CN102095040A - Method and device for seismic strengthening of shape memory alloy pipe networks - Google Patents
Method and device for seismic strengthening of shape memory alloy pipe networks Download PDFInfo
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- CN102095040A CN102095040A CN 201010585958 CN201010585958A CN102095040A CN 102095040 A CN102095040 A CN 102095040A CN 201010585958 CN201010585958 CN 201010585958 CN 201010585958 A CN201010585958 A CN 201010585958A CN 102095040 A CN102095040 A CN 102095040A
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Abstract
The invention provides a method and device for seismic strengthening of shape memory alloy pipe networks, and the method and device provided by the invention are used for reducing the tensile stress and bending stress of pipelines in earthquakes, dissipating the earthquake input energy, decreasing the earthquake reaction of pipe networks and protecting the pipe networks from being damaged and destroyed under the action of the earthquake. The device provided by the invention is composed of pipelines, a fixed connecting piece flange, a pipeline flange, a pipeline connecting bolt, a shape memory alloy bar and a shape memory alloy bar connecting bolt, wherein the pipelines are connected with the pipeline flange; the pipeline flange is connected with the pipeline connecting bolt; the fixed connecting piece flange is positioned at two sides of the pipeline flange, and is connected with the shape memory alloy bar; and the shape memory alloy bar is connected with the shape memory alloy bar connecting bolt. The method and device provided by the invention have the advantages that the earthquake input energy is dissipated, the pipeline earthquake reaction is decreased, and the nonoccurrence of damage and destroy of the pipelines under the action of earthquake is prevented; and after the earthquake, because the shape memory alloy has the capability of self restoration, the deformation of the pipelines is reset automatically without any maintenance and replacement.
Description
(1) technical field
The present invention relates to pipe technology, is exactly a kind of marmem pipe net Shockproof reinforcing method and device thereof specifically.
(2) background technique
Along with the development and the urbanization process of economical and society are accelerated, China's population and wealth are all progressively concentrated to the city, and the city heavy losses will occur inevitably when suffering the violent earthquake disaster.Pipe network is the important foundation facility of city operations, has born industry and delivery functions such as domestic water supply, air feed, fuel feeding and blowdown, for industrial production and daily life are transported various resources, as the blood circulation system in city.In a single day the lifeline pipe network system suffers eaerthquake damage, and the running of entire city just will stop, thereby brings huge inestimable economic loss.The repeatedly violent earthquake that countries in the world take place since 1971, for example SanFernando earthquake in 1971, Palm Springs in 1986 earthquake, Loma Prieta in 1989 earthquake, Northridge earthquake in 1994, nineteen ninety-five Kobe earthquake etc. all cause serious earthquake disaster to urban lifeline engineering and pipe network system.Above-mentioned earthquake disaster shows, and is serious by the direct economic loss that earthquake the caused indirect economic loss that is far from, and causes the reason of indirect economic loss to be attributed to the fragility of city lifeline system greatly again.The safety that improves life line system effectively is the work that meaning is very far-reaching.Meanwhile, China is in a few macroplate intersections, is universally acknowledged earthquake hotspot.Since on May 12nd, 08 Wenchuan special violent earthquake, repeatedly earthquake takes place again in China, and scholarly forecast China is about to enter the next earthquake high-incidence season.This shows that to the city lifeline system, especially existing pipe network carries out seismic hardening and transforms extremely urgent.
World developed country is the U.S. especially, just takes up to carry out life line system after San Fernando in 1971 earthquake, comprises the seismic hardening of urban pipe network.Successively set up that a linked groups and department carry out the seismic hardening research of pipe network surplus in the of ten, and in engineering practice is used, obtained effect preferably.Sun and Shien discover, is welded to connect for the pipeline for non-, and it is relevant that 80% pipeline destroyed and the joint of pipeline are destroyed, so the reinforcing of pipeline is the most effectual way that reduces the pipeline eaerthquake damage.Mainly contain two kinds for the pipeline strengthening method at present: a kind of is to strengthen join strength, strengthen its resistivity, but this method easily causes the brittle failure of connection part; Another kind method is Connecting format to be set at flexibly connect, and can produce bigger distortion in seismic process, thereby main distortion is concentrated on the joint of pipeline, has protected the destruction of pipeline itself.But this method easily causes the pipe joint distortion excessive because distortion concentrates on the pipe joint place, causes problems such as leakage.
The civil engineering structure seismic hardening that develops into of structural vibration control and intellectual material provides new technological approaches.Main controlling method has ACTIVE CONTROL, Passive Control and intelligent control in the civil engineering.Marmem is a kind ofly to have perception, driving and the new function material of multiple mechanical property such as reset certainly.The marmem that wherein is in austenitic state has super elastic characteristics, and when its maximum distortion was no more than 8%, material deformation can recover fully automatically.Since the super elastic shape memory alloy characteristic well from reset function, be a kind of excellent material that structure is carried out seismic hardening.Shape memory alloy material has all obtained using widely in fields such as Aero-Space, machinery, medical and civil engineerings, has wherein developed multiplely from the resetting structure vibration control apparatus in the civil construction project field, is a kind of intellectual material with extensive prospect.
(3) summary of the invention
The object of the present invention is to provide a kind of tensile stress of pipeline under the earthquake and marmem pipe net Shockproof reinforcing method device that damage and failure does not take place for flexural stress, the energy of dissipation earthquake input, the earthquake response that reduces pipe network, protection pipe network of reducing under geological process.
The object of the present invention is achieved like this: described marmem pipe net anti-seismic strengthening device, it is made up of pipeline, fixed connecting piece flange, piping flange, pipeline connecting bolt, marmem rod and marmem rod connecting bolt, pipeline connecting tube flange, piping flange connecting tube connecting bolt, the fixed connecting piece flange is positioned at the piping flange both sides, the fixed connecting piece flange connects the marmem rod, and the marmem rod connects marmem rod connecting bolt.Described a kind of marmem pipe net Shockproof reinforcing method, step is as follows:
The first step: select the thick Q235 steel plate of 10mm, make marmem rod fixed connecting piece, the internal diameter of link equates with outer diameter tube, external diameter is not less than internal diameter and adds 8cm, close the quantity of rod according to shape-memory, link is along the symmetrical perforate of external diameter periphery, and pore size and shape-memory close the equal diameters of rod;
Second step: select diameter range carefully excellent, form screw thread by being machined in marmem rod two ends at the austenite NiTi of 10-30mm marmem;
The 3rd step: fixed connecting piece and pipe wall welding is fixing, the marmem rod is penetrated the link attachment hole, and undertaken closely fixing by bolt.
Marmem pipe net Shockproof reinforcing method of the present invention and device thereof; the superelasticity large deformation that utilizes marmem is from reset function; and the energy dissipation capacity under the large deformation effect; reduce the tensile stress and the flexural stress of pipeline under the earthquake; the energy of dissipation earthquake input; reduce the earthquake response of pipeline, damage and failure does not take place under geological process with the protection pipeline.After earthquake finishes, because marmem has runback potential energy power, the present invention will make the distortion of pipeline be automatically reset, and not need any maintenance and replacement.
(4) description of drawings
Fig. 1 is a structural representation of the present invention.
(5) embodiment
The invention will be further described for example below in conjunction with accompanying drawing.
Embodiment 1: in conjunction with Fig. 1, the device that a kind of marmem pipe net of the present invention Shockproof reinforcing method adopts is by pipeline (1), fixed connecting piece flange (2), piping flange (3), pipeline connecting bolt (4), marmem rod (5) and marmem rod connecting bolt (6) are formed, pipeline (1) connecting tube flange (3), piping flange (3) connecting tube connecting bolt (4), fixed connecting piece flange (2) is positioned at piping flange (3) both sides, fixed connecting piece flange (2) connects marmem rod (5), and marmem rod (5) connects marmem rod connecting bolt (6).
Embodiment 2: in conjunction with Fig. 1, the present invention comprises piping flange two ends fixed connecting piece and the NiTi marmem under austenitic state is carefully excellent.Wherein the diameter of marmem rod and quantity are according to the size of pipeline and the target design of providing fortification against earthquakes.Fixed connecting piece and pipeline welding are fixed, and according to the perforate of the quantity of marmem rod symmetry, and the marmem rod are carried out bolt with link on link.
The present invention is primarily aimed at the seismic hardening of pipeline, its main thought is by the large deformation of super elastic shape memory alloy characteristic and runback potential energy power, can protect pipeline in earthquake, to be without prejudice better, so in whole seismic process, greatly improve the possibility of life line system proper functioning, also can reduce the danger that causes the secondary disaster that big bang brings such as natural gas leaking; And after shake,, can in very short time, automatically reset by its ability that can recover automatically, thereby eliminated since for a long time pipeline rehabilitation the massive losses that brings to economic development.
Embodiment 3: marmem pipe net Shockproof reinforcing method of the present invention, and technological scheme realizes by following three steps:
The first step: select to be not less than the thick Q235 steel plate of 10mm, make marmem rod fixed connecting piece.The internal diameter of link equates that with outer diameter tube external diameter is not less than internal diameter and adds 8cm.According to the quantity that shape-memory closes rod, link is along the symmetrical perforate of external diameter periphery, and pore size and shape-memory close the equal diameters of rod.
Second step: select diameter range carefully excellent, form screw thread by being machined in marmem rod two ends at the austenite NiTi of 10-30mm marmem.
The 3rd step: fixed connecting piece and pipe wall welding is fixing, the marmem rod is penetrated the link attachment hole, and undertaken closely fixing by bolt.
The working principle of marmem pipe net anti-seismic strengthening device:
Under geological process, when pipeline is subjected to tension, cause the stretch-draw of marmem rod simultaneously, the marmem rod will provide pulling force to pipeline, the axial deformation of restriction conduit.Simultaneously, if earthquake produces bending deflection to pipeline, also tension simultaneously of the shape-memory rod arranged of pipeline tensile zone then, its pulling force also suppresses the bending deflection of pipeline, reduces the damage and failure of structure.Simultaneously shape memory alloy material from reset function, will make pipeline can after shake, reset to reset condition.The marmem rod is in deformation process, and the energy of the earthquake that also dissipates input reduces the earthquake response of pipeline.
Claims (2)
1. marmem pipe net anti-seismic strengthening device, it is by pipeline (1), fixed connecting piece flange (2), piping flange (3), pipeline connecting bolt (4), marmem rod (5) and marmem rod connecting bolt (6) are formed, it is characterized in that: pipeline (1) connecting tube flange (3), piping flange (3) connecting tube connecting bolt (4), fixed connecting piece flange (2) is positioned at piping flange (3) both sides, fixed connecting piece flange (2) connects marmem rod (5), and marmem rod (5) connects marmem rod connecting bolt (6).
2. method that realizes by the described marmem pipe net of claim 1 anti-seismic strengthening device, it is characterized in that: step is as follows:
The first step: select the thick Q235 steel plate of 10mm, make marmem rod fixed connecting piece, the internal diameter of link equates with outer diameter tube, external diameter is not less than internal diameter and adds 8cm, close the quantity of rod according to shape-memory, link is along the symmetrical perforate of external diameter periphery, and pore size and shape-memory close the equal diameters of rod;
Second step: select diameter range carefully excellent, form screw thread by being machined in marmem rod two ends at the austenite Ni of 10-30mm Ti marmem;
The 3rd step: fixed connecting piece and pipe wall welding is fixing, the marmem rod is penetrated the link attachment hole, and undertaken closely fixing by bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010585958 CN102095040A (en) | 2010-12-14 | 2010-12-14 | Method and device for seismic strengthening of shape memory alloy pipe networks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010585958 CN102095040A (en) | 2010-12-14 | 2010-12-14 | Method and device for seismic strengthening of shape memory alloy pipe networks |
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| CN102095040A true CN102095040A (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010585958 Pending CN102095040A (en) | 2010-12-14 | 2010-12-14 | Method and device for seismic strengthening of shape memory alloy pipe networks |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482338A (en) * | 2014-12-09 | 2015-04-01 | 同济大学 | Water supply line K-shaped joint with emergency self-recovery capability |
| CN104600655A (en) * | 2013-10-30 | 2015-05-06 | 黄雪昀 | Strengthening structure for lightning rod device |
| CN104674969A (en) * | 2015-01-29 | 2015-06-03 | 苏州科技学院 | Annular curvature-related shape memory alloy damping device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0469491A (en) * | 1990-07-09 | 1992-03-04 | Toshiba Corp | Crack propagation suppression method for piping |
| CN2615225Y (en) * | 2003-04-25 | 2004-05-12 | 北京工业大学 | Shape memory alloy damper for construction structure |
| CN1303295C (en) * | 2005-01-20 | 2007-03-07 | 东南大学 | Super elastic shape memory alloy damper for rope, cable and slender rod |
-
2010
- 2010-12-14 CN CN 201010585958 patent/CN102095040A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0469491A (en) * | 1990-07-09 | 1992-03-04 | Toshiba Corp | Crack propagation suppression method for piping |
| CN2615225Y (en) * | 2003-04-25 | 2004-05-12 | 北京工业大学 | Shape memory alloy damper for construction structure |
| CN1303295C (en) * | 2005-01-20 | 2007-03-07 | 东南大学 | Super elastic shape memory alloy damper for rope, cable and slender rod |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600655A (en) * | 2013-10-30 | 2015-05-06 | 黄雪昀 | Strengthening structure for lightning rod device |
| CN104482338A (en) * | 2014-12-09 | 2015-04-01 | 同济大学 | Water supply line K-shaped joint with emergency self-recovery capability |
| CN104482338B (en) * | 2014-12-09 | 2016-08-24 | 同济大学 | One has emergent automatic recovery ability water supply line K shape joint |
| CN104674969A (en) * | 2015-01-29 | 2015-06-03 | 苏州科技学院 | Annular curvature-related shape memory alloy damping device |
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Application publication date: 20110615 |