CN115290456A - Test device and test method for simulating containment ring beam ultimate bearing capacity reduced scale - Google Patents
Test device and test method for simulating containment ring beam ultimate bearing capacity reduced scale Download PDFInfo
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
- G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention relates to a test device and a test method for simulating a containment ring beam ultimate bearing capacity scale, and belongs to the technical field of containment ring beam simulation equipment. A ring beam structure test piece of the test device is of an arc-shaped structure, three metal corrugated pipes are arranged in the ring beam structure test piece and the tooth block part respectively, and a first prestressed steel strand, a second prestressed steel strand and a third prestressed steel strand which penetrate through the ring beam structure test piece and the tooth block part are arranged in the three metal corrugated pipes; one end of the first prestressed steel strand, the second prestressed steel strand and the third prestressed steel strand is provided with an anchorage device, and the other end of the first prestressed steel strand, the second prestressed steel strand and the third prestressed steel strand is correspondingly provided with a first oil jack, a second oil jack and a third oil jack. The invention rotates the ring beam structure test piece by 90 degrees and lays the test piece, thereby being convenient for pouring the test piece, installing data acquisition equipment, loading prestress and observing cracks, and overcoming the pouring and placing difficulties caused by irregular shape.
Description
Technical Field
The invention relates to a test device and a test method for simulating a containment ring beam ultimate bearing capacity scale, and belongs to the technical field of containment ring beam simulation equipment.
Background
The containment vessel is a safety barrier of the nuclear power station, and guarantees that radioactive substances released to the environment are within allowable limits under normal operation or under temperature and pressure caused by a loss of coolant accident. The containment can bear natural disasters such as tornadoes, earthquakes, tsunamis and the like, can bear the impact of external flying objects, and has good sealing property and structural resistance for bearing the pressure of a loss of coolant accident no matter under any severe environmental conditions.
At present, the research on nuclear containment structure at home and abroad is mainly divided into the following aspects: (1) researching prestress loss of a containment; (2) researching a containment overall performance test method; (3) The research under the action of the internal pressure comprises the research under the design reference pressure and the research under the super-design reference pressure; (4) researching under the action of seismic load; (5) Research under the action of high temperature generated by loss of coolant accident (LOCA) (6) research under the action of impact load.
Because the ring beam part in the nuclear power containment is generally not the first damage part, the numerical simulation research on the ring beam part is less, and the test research is more few. However, the ring beam is an important part of the containment, and the safety of the containment is very important for the containment.
Therefore, the complex stress performance of the ring beam part in the nuclear power containment vessel needs to be researched in a scale test mode.
Disclosure of Invention
The invention provides a device and a method for simulating a containment ring beam ultimate bearing capacity scale test aiming at the problems, so as to realize the simulation of the real stress state of the containment ring beam and obtain an accurate test result.
The invention adopts the following technical scheme:
the invention relates to a test device for simulating the limit bearing capacity contraction scale of a containment ring beam, which comprises a ring beam structure test piece, a first oil pressure jack, a second oil pressure jack, a third oil pressure jack, a first prestressed steel strand, a second prestressed steel strand, a third prestressed steel strand and a metal corrugated pipe,
the ring beam structure test piece is of an arc-shaped structure, the arch surface of the arc-shaped structure ring beam structure test piece is provided with a tooth block part, three metal corrugated pipes are respectively arranged in the ring beam structure test piece and the tooth block part, and a first prestressed steel strand, a second prestressed steel strand and a third prestressed steel strand which penetrate through the ring beam structure test piece and the tooth block part are arranged in the three metal corrugated pipes;
the prestressed steel strand I is a vertical steel strand; the second prestressed steel strand and the third prestressed steel strand are dome steel strands; one ends of the first prestressed steel strand, the second prestressed steel strand and the third prestressed steel strand are provided with anchorage devices, and the other ends of the first prestressed steel strand, the second prestressed steel strand and the third prestressed steel strand are correspondingly provided with a first oil jack, a second oil jack and a third oil jack.
According to the simulation containment ring beam ultimate bearing capacity scale test device, the tooth block part is connected with the joint end face of the ring beam structure test piece arch face, one end face is a vertical end face, and the other end face is an inclined end face; the transition surface from the vertical end surface to the inclined end surface is in a sawtooth shape.
The invention relates to a test device for simulating the limit bearing capacity of a containment ring beam, which also comprises a pressure sensor; a plurality of strain gauges are pre-embedded on the steel bars in the tooth block part; and the plurality of strain gauges are led out by leads.
According to the test device for simulating the limit bearing capacity of the containment ring beam, the steel bars along each corner in the tooth block part are provided with the strain gauge.
The invention relates to a test device for simulating the limit bearing capacity contraction scale of a containment ring beam, wherein an anchorage device comprises an anchor plate, an anchor lower base plate and a spiral stirrup; the lower anchor base plate is of a cylindrical structure, and a spiral stirrup is sleeved on the outer side of the lower anchor base plate; one axial end of the anchor lower backing plate is connected with the metal corrugated pipe, and the other end of the anchor lower backing plate is provided with an anchor plate; the anchor plate is used for fixing the prestressed steel strand; the driving end of the oil jack is connected with the lower anchor backing plate; and a pressure sensor is arranged between the driving of the oil jack and the anchor plate.
The invention discloses a simulation containment ring beam ultimate bearing capacity shrinkage test device which further comprises a polytetrafluoroethylene plate, wherein a ring beam structure test piece is placed on the polytetrafluoroethylene plate.
The invention discloses a test method for simulating a containment ring beam ultimate bearing capacity scale test device, which comprises the following steps:
calculating the stress condition of a ring beam structure test piece with the size reduced in equal proportion under corresponding working conditions by using structure calculation software according to the actual size of the ring beam structure;
step two, preparing a ring beam structure test piece and a tooth block part according to the stress condition of the ring beam structure test piece obtained in the step one, and installing a strain gauge; reserving a corrugated pipe and installing an anchorage device in the ring beam structure test piece and the tooth block part, and installing a prestressed steel strand after pouring and curing the ring beam structure test piece and the tooth block part;
step three, placing the ring beam structure test piece prepared in the step two on a polytetrafluoroethylene plate, and respectively installing a first oil pressure jack, a second oil pressure jack and a third oil pressure jack at corresponding positions of a tooth block part on the ring beam structure test piece;
step four, operation of the test and recording of data: and controlling each oil jack to sequentially apply pressure to the ring beam structure test piece and the tooth block part, and recording the strain and displacement conditions of the ring beam structure test piece and the tooth block part through the strain gauge until the ring beam is damaged.
The test method of the limit bearing capacity contraction test device for the ring beam of the quasi-containment shell comprises the following steps of pre-jacking a ring beam structure test piece and a tooth block part by a first oil jack, a second oil jack and a third oil jack, and then anchoring a steel strand penetrating through the first oil jack; and connecting the lead of the strain gauge with corresponding data acquisition equipment.
The invention relates to a test method of a limit bearing capacity scale test device of a quasi-containment ring beam, which comprises the following four specific steps:
1) Controlling the oil jack III to apply pressure to the ring beam so as to simulate the equivalent radial prestress of the prestressed steel bars in the containment at the ring beam; keeping the load and recording the strain and displacement conditions;
2) Controlling the second oil jack to apply pressure to the ring beam so as to simulate the prestress of a prestressed tendon of a dome in the containment vessel; keeping the load and recording the strain and displacement conditions;
3) Controlling the oil jack to carry out graded loading on the ring beam so as to simulate the prestress of the pure vertical prestressed tendon in the containment vessel;
in the pressure applying process, initial pressure is applied firstly, the strain and displacement conditions are recorded, and the crack development condition is observed; and then increasing the load step by step, recording the strain and displacement conditions, and observing the crack development condition until the ring beam is damaged.
Advantageous effects
The test device for simulating the limit bearing capacity of the containment ring beam is characterized in that a ring beam structure test piece is rotated by 90 degrees and laid horizontally, so that the pouring of the test piece, the installation of data acquisition equipment, the loading of prestress and the observation of cracks are facilitated, and the difficulty in pouring and placing caused by irregular shape is overcome.
According to the test device for simulating the limit bearing capacity of the containment ring beam, the ring beam structure test piece and the loading device form a self-balancing system, and the ring beam structure test piece is fixed without an additional fixing device.
According to the test device for simulating the limit bearing capacity of the containment ring beam, the polytetrafluoroethylene plate is laid under the ring beam structure test piece, so that the friction force between the ring beam structure test piece and the ground is reduced, the radial constraint is reduced as much as possible, and the actual boundary condition of the ring beam is simulated more accurately.
The invention provides a test device for simulating the limit bearing capacity of a containment ring beam, which utilizes a pressure sensor to monitor the internal force of a prestressed tendon in real time and accurately simulates the actual stress state of the ring beam by adjusting the tension of three prestressed steel strands.
By adopting the test method for simulating the containment ring beam ultimate bearing capacity reduced scale test, the numerical simulation results of the stress condition and the like of the ring beam reduced scale test piece obtained by the structural calculation software are used for guiding the design of the reduced scale test model. The test result and the numerical simulation result can be mutually verified, and the reliability of the ring beam ultimate bearing capacity scale test result is ensured.
By adopting the test method for simulating the containment vessel ring beam ultimate bearing capacity scale test, the test device is relatively simple, the test method is relatively convenient and fast to operate, the actual boundary condition and the stress state of the ring beam in the containment vessel can be reasonably and accurately simulated, and the ultimate bearing capacity, the damage mode and the stress characteristic of the ring beam can be objectively and truly reflected.
Drawings
FIG. 1 is a schematic diagram of a modeling step of a containment ring beam limit bearing capacity scale test simulated by Abaqus;
FIG. 2 is a structural design diagram of a test piece for a containment ring beam ultimate bearing capacity scale test;
FIG. 2 (a) is a front elevation view of a test piece;
FIG. 2 (b) is a side elevation of a test piece
FIG. 2 (c) isbase:Sub>A sectional view taken along line A-A in FIG. 2 (base:Sub>A);
FIG. 2 (d) is a sectional view taken along line B-B of FIG. 2 (c);
FIG. 2 (e) is a sectional view taken along line C-C in FIG. 2 (C);
FIG. 3a is a schematic diagram of arrangement of prestressed steel strands in a containment ring beam ultimate bearing capacity scale test;
FIG. 3b is a schematic diagram of anchoring of prestressed steel strands in a containment ring beam ultimate bearing capacity scale test;
FIG. 4 is a schematic diagram of arrangement of a steel bar strain gauge for a containment ring beam ultimate bearing capacity scale test;
FIG. 5 is a front schematic view of a test device for a containment ring beam ultimate bearing capacity scale test;
FIG. 6 is a schematic side view of a test device for a containment ring beam ultimate bearing capacity scale test.
In the figure: 1. a ring beam structure test piece; 2. a first oil jack; 3. a second oil jack; 4. a third oil jack; 5. a polytetrafluoroethylene sheet; 6. a first prestressed steel strand; 7. a second prestressed steel strand; 8. a prestressed steel strand III; 9. an anchor plate; 10. a pressure sensor; 11. anchoring a base plate; 12. a spiral stirrup; 13. a metal bellows; 14. a strain gauge.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention. The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 5 and 6: the device for simulating the containment ring beam limit bearing capacity shrinkage test comprises a ring beam structure test piece 1, a first oil jack 2, a second oil jack 3, a third oil jack 4, a first prestressed steel strand 6, a second prestressed steel strand 7, a third prestressed steel strand 8 and a metal corrugated pipe 13;
the ring beam structure test piece 1 is of an arc-shaped structure, the arch face of the arc-shaped structure ring beam structure test piece 1 is provided with a tooth block part, three metal corrugated pipes 13 are respectively arranged in the ring beam structure test piece 1 and the tooth block part, and a prestressed steel strand I6, a prestressed steel strand II 7 and a prestressed steel strand III 8 which penetrate through the ring beam structure test piece 1 and the tooth block part are arranged in the three metal corrugated pipes 13; one ends of the first prestressed steel strand 6, the second prestressed steel strand 7 and the third prestressed steel strand 8 are provided with anchorage devices, and the other ends of the first prestressed steel strand, the second prestressed steel strand and the third prestressed steel strand are correspondingly provided with a first oil jack 2, a second oil jack 3 and a third oil jack 4. The ring beam structure test piece 1 is placed on the polytetrafluoroethylene plate 5 to reduce the friction between the ring beam structure test piece and a test field.
As shown in fig. 2 (a), (b), (c), (d), (e), and fig. 3 a: the tooth block part is connected with the joint end face of the arch face of the ring beam structure test piece, one end face of the tooth block part is a vertical end face, and the other end face of the tooth block part is an inclined end face; the transition surface from the vertical end surface to the inclined end surface is in a sawtooth shape. The prestressed steel strand I6 is a vertical steel strand; the second prestressed steel strand 7 and the third prestressed steel strand 9 are dome steel strands.
As shown in fig. 4, a plurality of strain gauges 14 are pre-embedded on the steel bars in the tooth block part; and the plurality of strain gauges are led out by leads. The strain gauges are respectively G1, G2, G3, G4, G5, G6, G7, G8, G9, G10, G11, G12, G13, G14, G15 and G16; and a strain gage is arranged on the steel bar along each corner part in the tooth block part.
As shown in fig. 3 b: the anchorage device comprises an anchor plate 9, an anchor lower backing plate 11 and a spiral stirrup 12; the anchor lower backing plate 11 is of a cylindrical structure, and the outer side of the anchor lower backing plate 11 is sleeved with a spiral stirrup 12; one axial end of the anchor backing plate 11 is connected with the metal corrugated pipe 13, and the other end of the anchor backing plate 11 is provided with an anchor plate 9; the anchor plate 9 is used for fixing the prestressed steel strand; the driving end of the oil jack is connected with the anchor lower backing plate. And a pressure sensor is arranged between the drive of each oil jack and each anchor plate.
As shown in fig. 1: the invention relates to a test device and a test method for simulating the limit bearing capacity of a containment ring beam, wherein the test method comprises the following steps:
calculating the stress condition of the ring beam with the size reduced in equal proportion under corresponding working conditions by using structural calculation software; and establishing a refined ring beam test model matched with the test by using Abaqus.
And (3) sequentially tensioning the three steel strands according to the test loading sequence by adopting a cooling method.
And obtaining the numerical simulation result of the ring beam scale test, wherein the numerical simulation result comprises a concrete stress cloud picture, a concrete tensile or compressive damage cloud picture, a steel bar stress cloud picture and the like, and the reference is provided for the subsequent ring beam test.
Step two, preparing a ring beam and an experimental device: the method comprises the steps of reducing the size of a containment ring beam in an equal proportion mode to obtain a ring beam structure test piece for testing, reserving a corrugated pipe, installing an anchorage device and a strain gauge, pouring and curing the ring beam structure test piece, and installing a prestressed steel strand I6; a second prestressed steel strand 7; a prestressed steel strand III 8;
step three, mounting a ring beam limit bearing capacity test device: placing the ring beam structure test piece prepared in the second step on a polytetrafluoroethylene plate 5; three oil jacks are sequentially installed at proper positions. And pre-jacking each oil jack, and then anchoring the steel strand penetrating through the oil jack. The displacement gauges are mounted to the ring beam and the displacement gauges and strain gauges 14 are connected to respective computers.
Step four, operation of the test and recording of data:
firstly, controlling a third oil jack 4 to apply pressure to the ring beam so as to simulate the equivalent radial prestress of a third prestressed steel strand 8 in the containment at the ring beam; the load was maintained and the strain and displacement were recorded.
Controlling the second oil jack 3 to apply pressure to the ring beam so as to simulate the prestress of a second dome prestress steel strand 7 in the containment vessel; the load was maintained and the strain and displacement were recorded.
And controlling the first oil jack 2 to carry out graded loading on the ring beam so as to simulate the prestress of the first pure vertical prestress steel strand 6 in the containment vessel. Firstly, applying initial pressure, recording strain and displacement conditions, and observing crack development conditions; and then gradually increasing the load, recording the strain and displacement conditions, and observing the crack development condition until the ring beam is damaged.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.
Claims (9)
1. Simulation containment ring roof beam ultimate bearing capacity reduced scale test device, its characterized in that: comprises a ring beam structure test piece, a first hydraulic jack, a second hydraulic jack, a third hydraulic jack, a first prestressed steel strand, a second prestressed steel strand, a third prestressed steel strand and a metal corrugated pipe,
the ring beam structure test piece is of an arc-shaped structure, the arch surface of the arc-shaped structure ring beam structure test piece is provided with a tooth block part, three metal corrugated pipes are respectively arranged in the ring beam structure test piece and the tooth block part, and a first prestressed steel strand, a second prestressed steel strand and a third prestressed steel strand which penetrate through the ring beam structure test piece and the tooth block part are arranged in the three metal corrugated pipes;
the first prestressed steel strand is a vertical steel strand; the second prestressed steel strand and the third prestressed steel strand are dome steel strands; and one ends of the first prestressed steel strand, the second prestressed steel strand and the third prestressed steel strand are provided with anchorage devices, and the other ends of the first prestressed steel strand, the second prestressed steel strand and the third prestressed steel strand are correspondingly provided with a first oil jack, a second oil jack and a third oil jack.
2. The simulated containment ring beam ultimate bearing capacity reduced scale test device of claim 1, wherein: the tooth block part is connected with the joint end surface of the arch surface of the ring beam structure test piece, one end surface of the tooth block part is a vertical end surface, and the other end surface of the tooth block part is an inclined end surface; the transition surface from the vertical end surface to the inclined end surface is in a sawtooth shape.
3. The simulated containment ring beam ultimate bearing capacity reduced scale test device of claim 2, wherein: the device also comprises a pressure sensor; a plurality of strain gauges are pre-embedded on the steel bars in the tooth block part; the plurality of strain gauges are led out by the lead.
4. The simulation containment ring beam ultimate bearing capacity reduced scale test device of claim 2 or 3, wherein: and a strain gage is arranged on the steel bar along each corner part in the tooth block part.
5. The simulation containment ring beam ultimate bearing capacity reduced scale test device of claim 1 or 3, characterized in that: the anchorage device comprises an anchor plate, an anchor lower backing plate and a spiral stirrup; the lower anchor base plate is of a cylindrical structure, and a spiral stirrup is sleeved on the outer side of the lower anchor base plate; one axial end of the anchor lower backing plate is connected with the metal corrugated pipe, and the other end of the anchor lower backing plate is provided with an anchor plate; the anchor plate is used for fixing the prestressed steel strand; the driving end of the oil jack is connected with the lower anchor backing plate; and a pressure sensor is arranged between the driving of the oil jack and the anchor plate.
6. The simulation containment ring beam ultimate bearing capacity reduced scale test device of claim 1, characterized in that: still include the polytetrafluoroethylene board, ring beam structure test piece is placed on the polytetrafluoroethylene board.
7. The test method for simulating the containment ring beam ultimate bearing capacity shrinkage test device according to claims 1 to 6 is characterized in that: the method comprises the following steps:
calculating the stress condition of a ring beam structure test piece with the size reduced in equal proportion under corresponding working conditions by using structure calculation software according to the actual size of the ring beam structure;
step two, preparing a ring beam structure test piece and a tooth block part according to the stress condition of the ring beam structure test piece obtained in the step one, and installing a strain gauge; reserving a corrugated pipe and installing an anchorage device in the ring beam structure test piece and the tooth block part, and installing a prestressed steel strand after pouring and curing the ring beam structure test piece and the tooth block part;
placing the ring beam structure test piece prepared in the second step on a polytetrafluoroethylene plate, and respectively installing a first oil jack, a second oil jack and a third oil jack at corresponding positions of a tooth block part on the ring beam structure test piece;
step four, operation of the test and recording of data: and controlling each oil pressure jack to sequentially apply pressure to the ring beam structure test piece and the tooth block part, and recording the strain and displacement conditions of each ring beam structure test piece and the tooth block part through the strain gauge until the ring beam is damaged.
8. The test method of the simulated containment ring beam ultimate bearing capacity scale test device according to claim 7, characterized in that: in the third step, pre-jacking the ring beam structure test piece and the tooth block part by using the first hydraulic jack, the second hydraulic jack and the third hydraulic jack, and then anchoring the steel strand penetrating through the first hydraulic jack; and connecting the lead of the strain gauge with corresponding data acquisition equipment.
9. The test method of the limit bearing capacity reduced scale test device for the quasi-containment ring beam according to claim 7, is characterized in that: the fourth step is as follows:
1) Controlling the oil jack III to apply pressure to the ring beam so as to simulate the equivalent radial prestress of the prestressed steel bars in the containment at the ring beam; keeping the load and recording the strain and displacement conditions;
2) Controlling the second oil jack to apply pressure to the ring beam so as to simulate the prestress of a prestressed tendon of a dome in the containment vessel; keeping the load and recording the strain and displacement conditions;
3) Controlling the oil jack to carry out graded loading on the ring beam so as to simulate the prestress of the pure vertical prestressed tendon in the containment vessel;
in the pressure applying process, firstly, applying initial pressure, recording the strain and displacement conditions, and observing the crack development condition; and then gradually increasing the load, recording the strain and displacement conditions, and observing the crack development condition until the ring beam is damaged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210890442.2A CN115290456A (en) | 2022-07-27 | 2022-07-27 | Test device and test method for simulating containment ring beam ultimate bearing capacity reduced scale |
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| CN202210890442.2A CN115290456A (en) | 2022-07-27 | 2022-07-27 | Test device and test method for simulating containment ring beam ultimate bearing capacity reduced scale |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118098653A (en) * | 2024-01-22 | 2024-05-28 | 广州市建筑材料工业研究所有限公司 | Spherical steel containment performance test device |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118098653A (en) * | 2024-01-22 | 2024-05-28 | 广州市建筑材料工业研究所有限公司 | Spherical steel containment performance test device |
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