CN114018342B - Dynamic response test device under sudden failure action of suspension tunnel supporting member - Google Patents
Dynamic response test device under sudden failure action of suspension tunnel supporting member Download PDFInfo
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- CN114018342B CN114018342B CN202111537210.0A CN202111537210A CN114018342B CN 114018342 B CN114018342 B CN 114018342B CN 202111537210 A CN202111537210 A CN 202111537210A CN 114018342 B CN114018342 B CN 114018342B
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- 239000000725 suspension Substances 0.000 title claims abstract description 26
- 230000004044 response Effects 0.000 title claims abstract description 21
- 230000009471 action Effects 0.000 title claims abstract description 12
- 238000004873 anchoring Methods 0.000 claims abstract description 24
- 210000000078 claw Anatomy 0.000 claims abstract description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims description 9
- 230000001133 acceleration Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 238000004088 simulation Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 101100460844 Mus musculus Nr2f6 gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a dynamic response test device under the sudden failure action of a suspension tunnel supporting member. The device comprises a test pipeline, a pipeline end hoop, a pipeline anchoring support, a pipeline middle hoop, a pipeline supporting member, a supporting member anchoring support, a pipeline supporting member to be disabled, a supporting member disabling triggering device and a sensor measuring device. The test pipeline is fixed through the end hoop and the bracket, and a pipeline supporting member is arranged on the test pipeline. The test tube and the support member are provided with sensors. The pipe support member to be disabled is cut in its middle portion into an engageable saw tooth form. The supporting member failure triggering device is a pneumatic mechanical claw, can clamp the sawtooth part, and can also be suddenly loosened to simulate the supporting member failure. The invention can realize test simulation and data recording under the condition of sudden failure of the underwater suspension tunnel supporting member.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a dynamic response test device under the action of sudden failure of a supporting member of a suspension tunnel.
Background
With the continuous development of economy and science and technology in China, the requirement of crossing three straits and communicating continents with partial islands in China is more urgent, and the method is a necessary way for promoting the strategy of ocean strong China. The suspension tunnel is mainly composed of: 1) A tunnel pipe body which is suspended under water by buoyancy for about 30 m; 2) Revetment segment structures; 3) A support member of the tunnel pipe body; 4) The deep water foundation of the seabed anchoring supporting member is composed of four parts. The novel structure of the suspension tunnel has the unique advantages of large spanning capacity, no influence of bad weather in the operation stage, relatively low manufacturing cost and the like, and is considered to be the most prospective novel cross-sea traffic structural form in the 21 st century. In recent years, scholars at home and abroad have developed extensive researches on the suspended tunnel, but the suspended tunnel is not put into practice worldwide at present, and the main reason is that the public still has doubt on the safety of the suspended tunnel.
The supporting member of the suspension tunnel is generally of an elongated structure, has small bending rigidity and mainly bears axial force (tensile force or pressure), and has the effects of balancing buoyancy and gravity of the pipe body on one hand and limiting excessive vibration of the underwater tunnel pipe body in a complex water flow environment on the other hand. The supporting member is an important bearing member of the suspension tunnel, and the connection part of the suspension tunnel pipe body and the supporting member is regarded as a weaker area in the whole structure, and the suspension tunnel supporting member has the risk of sudden failure under the effects of seawater corrosion, vibration fatigue, even external sunken ship, submarine impact and the like. Once the local supporting member suddenly fails, the strong vibration of the whole suspension tunnel and the sudden increase of the stress of the rest supporting members are inevitably caused, and the safe operation of the suspension tunnel is seriously threatened.
Currently, there is a very lack of research on the dynamic response of a suspended tunnel in the event of a sudden failure of the support member. Therefore, the invention is necessary to provide a dynamic response test device under the sudden failure action of the support member of the suspension tunnel based on a scale model, so that the dynamic response test device is used for carrying out the sudden failure dynamic response test of the local support member, is not only beneficial to grasping the vibration mechanism of the suspension tunnel, verifying the accuracy of the related suspension tunnel theory and numerical model, but also accumulates experience for the suspension tunnel engineering practice in the future.
Disclosure of Invention
The invention aims to provide a dynamic response test device under the sudden failure action of a support member of a suspension tunnel, which provides an effective test means for analyzing the dynamic response of the suspension tunnel under the accidental action of the sudden failure of the support member and the force redistribution in the residual structure.
The invention is used for simulating the sudden failure of the support member of the pipe body of the suspension tunnel and recording the dynamic response data of the suspension tunnel in the process, and the test device comprises a test pipe, a pipe end hoop, a pipe anchoring support, a pipe middle hoop, a pipe support member, a support member anchoring support, a support member to be failed, a support member failure triggering device and a sensor measuring device.
The test pipeline is an aluminum alloy pipe body with a uniform section;
the test pipeline just passes through the hoop at the end part of the pipeline; the test pipeline anchoring bracket is a triangular steel bracket and comprises a fixing screw, a horizontal platform and an inclined strut; the anchor ear at the end part of the pipeline is fixed on a horizontal platform by a fixing screw, and the horizontal platform is fixedly connected with the diagonal bracing;
The middle part of the test pipeline is provided with middle hoops of the pipeline at intervals;
the middle hoop of the pipeline comprises two identical annular hoops, a middle hoop fixing screw of the pipeline and a supporting member fixing screw; installing two annular hoops in the middle of the test pipeline, and connecting the two annular hoops with screws and clamping the test pipeline;
the pipeline supporting member is an aluminum alloy hollow pipe, and holes are formed in the two ends of the pipeline supporting member so as to be convenient for bolting; one end of the pipeline supporting member is connected with the middle anchor ear of the pipeline through a supporting member fixing screw, and the other end of the pipeline supporting member is connected with the supporting member anchoring bracket;
The pipeline supporting member is clamped between the two L-shaped beams and is fixedly connected by the screws;
The material of the pipeline supporting member to be disabled is the same as that of the test pipeline supporting member, and the pipeline supporting member is only broken in the middle of the member and cut into two mutually meshed saw-tooth forms; one end is connected with the middle anchor ear of the pipeline through a supporting member fixing screw, and the other end is connected with the two L-shaped beams through a supporting member anchoring bracket fixing screw;
the supporting member failure triggering device is a pneumatic mechanical claw and is arranged at a sawtooth-shaped meshing part of the pipeline supporting member to be failed, and when the mechanical claw is tightly held, the supporting member to be failed can be meshed, so that the axial force can be normally transmitted; when the gripper is released, the support member to be disabled will disengage rapidly under axial force;
The sensor measuring device comprises a displacement sensor, a strain sensor and an acceleration sensor, and is arranged on the test pipeline;
the sensor measuring device also comprises a tension pressure sensor which is arranged on the test pipeline supporting member and the supporting member to be failed;
The invention has the advantages of clear structure, convenient installation, safety and reliability. The dynamic response test simulation under the sudden failure action of the suspension tunnel supporting member under the setting of different test working conditions (such as the failure position of the suspension tunnel supporting member, the number of the supporting members and the like) can be realized.
Drawings
FIG. 1 is a schematic elevational view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view A-A of the test tube, tube end anchor ear and test tube anchor bracket of FIG. 1;
FIG. 3 is a B-B cross-sectional view of the middle anchor ear and tube support member of the tube of FIG. 1;
FIG. 4 is a detail view of the support member anchor bracket of section C of FIG. 1;
fig. 5 is a detailed view of the support member and support member failure triggering apparatus of fig. 1, which is intended to fail at section D.
The structure in the figure is as follows: the test pipeline 1, the pipeline end anchor hoop 2, the pipeline anchoring support 3, the pipeline middle anchor hoop 4, the pipeline supporting member 5, the supporting member anchoring support 6, the supporting member 7 to be in failure and the supporting member failure triggering device 8.
Detailed Description
The invention is described below with reference to the drawings and the detailed description.
As shown in fig. 1, a dynamic response test apparatus for a sudden failure of a suspended tunnel support member, comprising: the test pipeline 1, the pipeline end hoop 2, the pipeline anchoring support 3, the pipeline middle hoop 4, the pipeline supporting member 5, the supporting member anchoring support 6, the supporting member 7 to be in failure, the supporting member failure triggering device 8 and the sensor measuring device.
The test pipeline 1 is an aluminum alloy pipe body with a uniform section.
As shown in fig. 1 and 2, the test pipe 1 passes right through the pipe end anchor ear 2, which grips the test pipe. The test pipeline anchoring bracket 3 is a triangular steel bracket and comprises a fixing screw 3-1, a horizontal platform 3-2 and an inclined strut 3-3; the horizontal platform 3-2 is fixedly connected with the diagonal brace 3-3, and the pipe end hoop 2 is fixed on the horizontal platform 3-2 by the fixing screw 3-1, so that the test pipe 1 is connected with the test pipe anchoring support 3 through the pipe end hoop 2.
As shown in fig. 1 and 3, three pairs of annular hoops 4 in the middle of the pipeline are installed on the pipeline at equal intervals, each pair of hoops 4 comprises two identical annular hoops 4-1, and the two annular hoops 4-1 are connected by a screw 4-2 and clamp the test pipeline 1. The sensor measuring device comprises a displacement sensor, a strain sensor and an acceleration sensor, and is arranged on the aluminum alloy test pipeline 1.
As shown in fig. 1, 3 and 4, the pipe supporting member 5 is an aluminum alloy hollow pipe, and is provided with holes at two ends for facilitating the bolting; one end of the pipeline supporting member 5 is connected with the middle hoop 4 of the pipeline through a supporting member fixing screw 4-3.
As shown in fig. 1 and 4, the support member anchoring bracket 6 includes two L-shaped beams 6-1 and support member anchoring bracket fixing screws 6-2, and the pipe support member 5 is sandwiched between the two L-shaped beams 6-1 and is penetrated and fixedly connected by the screws 6-2. In this way, one end of the pipeline supporting member 5 is connected with the middle hoop 4 of the pipeline, and the other end is hinged with the supporting member anchoring bracket 6, so that the pipeline supporting member can bear the pulling and pressing forces along the axial direction of the hollow pipe.
As shown in fig. 1 and 5, the pipe support member 7 to be failed is made of the same material as the rest of the test pipe support member 5, is broken only in the middle of the member, and is cut into two serration forms capable of being engaged with each other; similarly, the pipe support member 7 to be disabled is connected at one end to the pipe middle anchor ear 4 by the support member set screw 4-3 and at the other end to the two L-beams 6-1 by the support member anchor bracket set screw 6-2. Five pipe support members 5 and one pipe support member 7 to be failed are mounted on the test pipe 1 in total.
As shown in fig. 1 and 5, the supporting member failure triggering device 8 is a pneumatic control mechanical claw, and an external compressed air source is used for controlling the clamping or loosening of the mechanical claw; when the mechanical claw is tightly held, the pipeline supporting member 7 to be disabled is originally broken into two sections, and the saw-tooth-shaped parts are tightly attached to each other under the action of circumferential pressure of the mechanical claw and can bear certain pulling pressure along the axial direction of the supporting member; a pull pressure sensor is provided on the test tube support member 5 and the support member 7 to be disabled.
After the dynamic response test device under the sudden failure effect of the suspension tunnel supporting member is installed, the opening of the aluminum alloy pipe body 1 is closed and placed in a water tank. Because the test pipeline is subjected to gravity and water buoyancy at the same time, unbalance exists between the gravity and the buoyancy, and the pipeline supporting member 5 and the meshed failure-simulating supporting member 7 are in a stretching or compressing state so as to balance the gravity and the buoyancy of the test pipeline.
When the mechanical claw suddenly loosens under the control of the external air source control switch, the circumferential pressure of the mechanical claw disappears, and the originally meshed pipeline supporting member 7 to be disabled is quickly released under the action of axial force, so that the sudden failure of the supporting member of the suspended tunnel is manually controlled and simulated, and the power response test simulation under the action of the sudden failure of the supporting member of the suspended tunnel can be realized.
By varying the mounting position of the pipe support member 7 to be disabled, experimental simulation of different failure positions of the support member can be achieved.
The displacement sensor, the strain sensor and the acceleration sensor are connected with a computer, so that the displacement, the strain and the acceleration of the test pipeline 1 are measured and recorded after the support member suddenly fails; meanwhile, the tension and pressure sensor is connected with a computer, so that the record of the axial force loss of the support member 7 to be disabled is realized, and the axial force variation of the rest pipeline support members 5 is measured and recorded.
Claims (5)
1. The dynamic response test device is used for simulating the sudden failure of the support member of the pipe body of the suspension tunnel and recording dynamic response data of the suspension tunnel in the process, and comprises a test pipe (1), a pipe end hoop (2), a pipe anchoring support (3), a pipe middle hoop (4), a pipe support member (5), a support member anchoring support (6), a support member (7) to be failed, a support member failure triggering device (8) and a sensor measuring device; the method is characterized in that:
the test pipeline (1) is an aluminum alloy pipe body with a constant section;
The test pipeline (1) passes through the hoop (2) at the end part of the pipeline; the test pipeline anchoring bracket (3) is a triangular steel bracket and comprises a fixing screw (3-1), a horizontal platform (3-2) and an inclined strut (3-3); the anchor ear (2) at the end part of the pipeline is fixed on the horizontal platform (3-2) by the fixing screw (3-1), and the horizontal platform (3-2) is fixedly connected with the diagonal bracing (3-3);
The middle part of the test pipeline (1) is provided with middle hoops (4) of the pipeline at intervals;
The middle hoop (4) of the pipeline comprises two identical annular hoops (4-1), a middle hoop fixing screw (4-2) of the pipeline and a supporting member fixing screw (4-3); two annular hoops (4-1) are arranged in the middle of the test pipeline (1), and the two annular hoops (4-1) are connected by screws (4-2) and clamp the test pipeline (1);
The pipeline supporting member (5) is an aluminum alloy hollow pipe, and holes are formed at two ends of the pipeline supporting member so as to be convenient for bolt connection; one end of a pipeline supporting member (5) is connected with a middle hoop (4) of the pipeline through a supporting member fixing screw (4-3), and the other end of the pipeline supporting member is connected with a supporting member anchoring bracket (6);
the pipeline supporting member (5) is clamped between the two L-shaped beams (6-1) and fixedly connected by the screws (6-2);
The material of the pipeline supporting member (7) to be disabled is the same as that of the test pipeline supporting member (5), and the pipeline supporting member is only broken in the middle part of the member and is cut into two mutually meshed saw-tooth forms; one end is connected with the middle hoop (4) of the pipeline through a supporting member fixing screw (4-3), and the other end is connected with the two L-shaped beams (6-1) through a supporting member anchoring bracket fixing screw (6-2);
The supporting member failure triggering device (8) is a pneumatic mechanical claw, is arranged at a sawtooth-shaped meshing part of the pipeline supporting member (7) to be failed, and can mesh the supporting member (7) to be failed when the mechanical claw is tightly held, so as to normally transmit the axial force; when the gripper is released, the support member (7) to be deactivated will be rapidly disengaged under axial force;
the sensor measuring device comprises a displacement sensor, a strain sensor and an acceleration sensor, and is arranged on the test pipeline (1);
the sensor measuring device also comprises a tension pressure sensor which is arranged on the test pipeline supporting member (5) and the supporting member (7) to be disabled.
2. A dynamic response test apparatus under the influence of a sudden failure of a suspended tunnel support member as claimed in claim 1, wherein: the end hoop (2) is an omega-shaped whole, the test pipeline (1) can just pass through the circular ring of the end hoop (2), a protruding plate is arranged on the ring of the end hoop (2), and the end hoop is convenient to be connected to the pipeline anchoring support horizontal platform (3-2) by using the fixing screw (3-1).
3. A dynamic response test apparatus under the influence of a sudden failure of a suspended tunnel support member as claimed in claim 1, wherein: three pairs of identical annular hoops (4-1) are arranged on the test pipeline (1) at equal intervals, and then five pipeline supporting members (5) and one pipeline supporting member (7) to be disabled are installed.
4. A dynamic response test apparatus under the influence of a sudden failure of a suspended tunnel support member as claimed in claim 1, wherein: the pipeline supporting member (5) is an aluminum alloy hollow pipe and is provided with holes at two ends, and the two ends of the pipeline supporting member are respectively fixed to the middle anchor ear (4) of the pipeline and the supporting member anchoring bracket (6) through screws (4-2) and fixing screws (6-2); the boundary condition of the pipeline supporting member (5) is hinged, and the pipeline supporting member bears the pulling and pressing force along the axial direction of the hollow pipe.
5. A dynamic response test apparatus under the influence of a sudden failure of a suspended tunnel support member as claimed in claim 1, wherein: the supporting member failure triggering device (8) is a pneumatic control mechanical claw, and is externally connected with a compressed air source to control the clamping or loosening of the mechanical claw; when the mechanical claw is tightly held, the pipeline supporting member (7) which is originally broken into two sections and is to be disabled is tightly attached to the serrated part and is integrated with the serrated part under the action of circumferential pressure of the mechanical claw, and the pipeline supporting member can bear certain pulling pressure along the axial direction of the supporting member; when the gripper suddenly releases, the gripper hoop pressure is removed and the originally engaged pipe support member (7) intended to fail is quickly released, thereby manually controlling and simulating the sudden failure of the suspended tunnel support member.
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| CN202111537210.0A CN114018342B (en) | 2021-12-09 | 2021-12-09 | Dynamic response test device under sudden failure action of suspension tunnel supporting member |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111537210.0A CN114018342B (en) | 2021-12-09 | 2021-12-09 | Dynamic response test device under sudden failure action of suspension tunnel supporting member |
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| CN114018342A CN114018342A (en) | 2022-02-08 |
| CN114018342B true CN114018342B (en) | 2024-05-07 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034504A (en) * | 2014-05-26 | 2014-09-10 | 浙江大学 | Suspension tunnel whole impact response testing device |
| CN111413131A (en) * | 2020-05-22 | 2020-07-14 | 广西大学 | Suspension tunnel anchor rope inefficacy and dynamic response test device that collapses in succession |
| CN216433087U (en) * | 2021-12-09 | 2022-05-03 | 西南石油大学 | Dynamic response test device under sudden failure of suspension tunnel supporting member |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10969314B2 (en) * | 2019-07-05 | 2021-04-06 | Shandong University Of Science And Technology | Device and method for anchor bolt (cable) supporting structure test and anchoring system performance comprehensive experiment |
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2021
- 2021-12-09 CN CN202111537210.0A patent/CN114018342B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034504A (en) * | 2014-05-26 | 2014-09-10 | 浙江大学 | Suspension tunnel whole impact response testing device |
| CN111413131A (en) * | 2020-05-22 | 2020-07-14 | 广西大学 | Suspension tunnel anchor rope inefficacy and dynamic response test device that collapses in succession |
| CN216433087U (en) * | 2021-12-09 | 2022-05-03 | 西南石油大学 | Dynamic response test device under sudden failure of suspension tunnel supporting member |
Non-Patent Citations (1)
| Title |
|---|
| 移动荷载作用下悬浮隧道动力响应分析;项贻强;林亨;陈政阳;;振动与冲击;20180228(第04期);全文 * |
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