Intercity railway viaduct pier-support-beam rail integrated structure low-cycle reciprocating load derrick test device and use method thereof

Abstract

The invention discloses an inter-city railway viaduct pier-support-beam rail integrated structure low-cycle reciprocating load derrick test device and a use method thereof. The inter-city railway viaduct pier-support-beam rail integrated structure low-cycle reciprocating load derrick test device comprises an experiment platform, a self-lifting reaction frame, a reaction wall back wall, a longitudinal force application system, a transverse force application system and a pier-support-beam rail integrated structure used for experiment. The bridge pier-support-beam rail integrated structure comprises a bridge pier, a support and two beam rail structures, and the two beam rail structures are assembled into a derrick beam rail through derrick steel beams and derrick rivets. Two beam-rail structures are bound together, the two beam-rail structures form a whole during loading and can work cooperatively, the participation influence of the beam-rail, the expansion joint and the support can be considered in the test, the pier-support-beam-rail multi-component synergistic effect cannot be considered, and the problems that in the prior art, the mechanical and anti-seismic performance research of the bridge pier cannot be considered are solved. And the balance of the beam rail structure cannot be realized.

Description

Technical Field

[0001] The present invention relates to the field of rail transit earthquake-resistant and disaster-prevention engineering, and in particular to a low-cycle reciprocating load holding rod test device of an intercity railway viaduct pier-support-beam-rail integrated structure and a use method thereof. Background Art

[0002] Rail transit test equipment is equipment and facilities used to test and verify rail transit vehicles, systems and related technical performance. It is used to verify the various performance indicators of the rail transit system including vehicles, lines, signals, etc., to ensure its reliability, safety, comfort, energy saving and environmental protection in actual operation.

[0003] The existing rail transit pier-support-beam-rail integrated structure test device uses a loading device fixed on the top of the pier, that is, one end of the loading device is connected to the top of the pier, and the other end is connected to the actuator to realize the low-cycle reciprocating load test of the rail transit pier. However, this experimental device cannot consider the synergistic effect of the pier-support-beam-rail multi-components, and can only obtain the mechanical and seismic performance of the pier. This is mainly because the supports on the piers of the existing test device support the left and right beam-rail structures, and the balance of the beam-rail structure cannot be achieved. The experimental results are not accurate enough, and the experimental factors are not comprehensive enough.

[0004] Therefore, how to make the two beam-rail structures of the rail transit pier-support-beam-rail integrated structure form a whole when loaded, work together to achieve the balance of the beam-rail structure, is an area that the existing rail transit pier-support-beam-rail integrated structure test device urgently needs to be improved. Summary of the invention

[0005] The supports on the existing bridge piers mentioned above support the left and right beam-rail structures, and the balance of the beam-rail structures cannot be achieved. It is impossible to consider the synergistic effect of the pier-support-beam-rail multi-components, and only the mechanical and seismic performance of the pier can be obtained. The present invention provides a low-cycle reciprocating load holding rod test device for the integrated structure of the pier-support-beam-rail of an intercity railway viaduct and its use method. The invention idea of ​​the test device comes from the operation of "binding" objects with ropes in daily life, which binds the left and right beam-rail structures together, that is, "holding rods", so that the two beam-rail structures form a whole when loaded. The specific technical scheme is as follows: Firstly, the present invention provides a low-cycle reciprocating load arm test device for an intercity railway viaduct pier-support-beam-rail integrated structure, comprising an experimental platform, a self-lifting reaction frame, a reaction wall back wall, a longitudinal force application system, a transverse force application system and a pier-support-beam-rail integrated structure for experiments; the pier-support-beam-rail integrated structure comprises a pier, a support, and two beam-rail structures, which are assembled into an arm beam-rail by an arm steel beam and arm rivets; the self-lifting reaction frame, the reaction wall back wall and the pier-support-beam-rail integrated structure are all arranged on the experimental platform, and the reaction wall back wall is located on one side of the self-lifting reaction frame; the longitudinal force application system comprises a hydraulic jack, which is arranged on the self-lifting reaction frame; the transverse force application system comprises a servo hydraulic actuator, which is arranged on the reaction wall back wall; the pier-support-beam-rail integrated structure is located directly below the hydraulic jack, and the servo hydraulic actuator is aligned with the arm beam rail of the pier-support-beam-rail integrated structure.

[0006] The aforementioned intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load arm test device, the said arm steel beams are two, which are arranged in parallel on the outside of the two beam-rail structures; both ends of the arm steel beams are provided with rivet holes, the said arm rivets anchor the two arm steel beams together from both ends, and assemble the two beam-rail structures into an arm beam-rail.

[0007] The aforementioned intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device and its use method, the self-lifting reaction frame includes a column and a reaction beam erected on the column, the hydraulic jack is suspended on the reaction beam, and is used to apply vertical reaction force to the pier-support-beam-rail integrated structure.

[0008] Preferably, in the aforementioned intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load arm test device, the hydraulic jack applies force to the arm beam-rail of the pier-support-beam-rail integrated structure, and a load-sharing beam is provided between the hydraulic jack and the arm beam-rail structure to evenly distribute the vertical axial force applied by the hydraulic jack to the two beam-rail structures.

[0009] The aforementioned intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load arm test device, the servo-hydraulic actuator is arranged on the back wall of the reaction wall through the actuator connecting steel base plate, so as to apply a lateral reaction force to the pier-support-beam-rail integrated structure; the servo-hydraulic actuator includes a mounting support, a telescopic force rod and a force end head, the mounting support is fixed on the actuator connecting steel base plate, the telescopic force rod can adjust the angle up and down around the mounting support, and the force end head is located at the front end of the telescopic force rod, and acts on the arm steel beam of the arm beam rail.

[0010] The aforementioned intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load gripper test device, the lateral force application system also includes a fine leveling device, the fine leveling device is installed on the servo hydraulic actuator and the back wall of the reaction wall, and is used to adjust the balance between the servo hydraulic actuator and the pier-support-beam-rail integrated structure.

[0011] Preferably, in the aforementioned intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load gripper test device, the fine leveling device includes a manual pulley and two steel hinges, one end of each steel hinge is connected to the telescopic force-applying rod of the servo hydraulic actuator, and the manual pulley is installed on the back wall of the reaction wall. The servo hydraulic actuator is adjusted by lowering or raising the manual pulley, so that the intersection of the lateral axial force applied by the servo hydraulic actuator and the vertical axial force applied by the hydraulic jack is always maintained on the center line of the pier-support-beam-rail integrated structure.

[0012] The aforementioned intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device, wherein a rubber pad is provided between the two beam-rail structures of the pier-support-beam-rail integrated structure.

[0013] The aforementioned intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device, the experimental platform is a reaction wall ground anchor groove, and the piers of the pier-support-beam-rail integrated structure are fixed on the reaction wall ground anchor groove by ground anchor rods.

[0014] Secondly, the present invention provides a method for using the aforementioned intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device, comprising the following steps: 1) Fix the self-lifting reaction frame on the anchor groove of the reaction wall, fix the servo hydraulic actuator on the back wall of the reaction wall, construct the pier, support, beam-rail structure into a complete pier-support-beam-rail integrated structure according to the requirements of the drawings, and fix the bottom of the pier component on the anchor groove of the reaction wall; 2) Tie the two beam-rail structures together with the pole steel beam and pole rivets to assemble them into a pole beam-rail. The compression degree of the rubber pad between the two beam-rail structures can be controlled by adjusting the pole rivets. 3) Connect the servo hydraulic actuator to the back wall of the reaction wall through the actuator connecting steel bottom plate, fix the servo hydraulic actuator on the back wall of the reaction wall, and install the fine leveling device on the servo hydraulic actuator and the back wall of the reaction wall to adjust the balance between the servo hydraulic actuator and the loaded specimen; 4) Fix the hydraulic jack on the self-lifting reaction frame, and place a load-sharing beam between the hydraulic jack and the beam rail to evenly distribute the axial force applied by the hydraulic jack to the left and right beam rail structures; 5) Apply the force end of the servo hydraulic actuator to the steel beam of the beam rail. After the servo hydraulic actuator and the hydraulic jack apply force or displacement, start the low-cycle reciprocating load test of the pier-support-beam rail integrated structure.

[0015] Beneficial effects of the present invention: 1) The holding rod test device of the present invention bundles the left and right beam-rail structures together, namely the "holding rod", so that the two beam-rail structures form a whole when loaded and can work together. The influence of the beam-rail, expansion joint and support can be considered in the test, and the synergistic effect of the pier-support-beam-rail multi-component cannot be considered, which solves the problem that the balance of the beam-rail structure cannot be achieved in the current research on the mechanics and seismic performance of the piers.

[0016] 2) The pole holding test device of the present invention is simple to manufacture, easy to operate, and stable to use. During the experiment, it can be used immediately after installation without adjustment. It is simple to operate and has no other auxiliary actions. The servo hydraulic actuator can realize the test loading when it works, and it has good practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a low-cycle reciprocating load holding rod test device of an intercity railway viaduct pier-support-beam-rail integrated structure and a method for using the same; Figure 2 It is a side view schematic diagram of the intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device and its use method of the present invention; Figure 3 It is a schematic diagram of the side structure of the holding rod beam rail of the present invention; Figure 4 It is a schematic diagram of the holding rod beam rail structure of the present invention; Figure 5 It is a top view schematic diagram of the holding rod beam rail of the present invention.

[0018] In the figure: 1. Experimental platform; 2. Self-lifting reaction frame; 21. Column; 22. Reaction beam; 3. Reaction wall back wall; 4. Pier-support-beam-rail integrated structure; 41. Pier; 42. Support; 43. Beam-rail structure; 5. Holding rod steel beam; 6. Holding rod rivet; 7. Hydraulic jack; 8. Servo hydraulic actuator; 9. Load-sharing beam; 10. Actuator connecting steel bottom plate; 11. Leveling device; 12. Rubber pad; 13. Ground anchor rod. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with embodiments and drawings. Example

[0020] This embodiment is a low-cycle reciprocating load holding rod test device for an intercity railway viaduct pier-support-beam-rail integrated structure and a method for using the same. Figures 1 to 5 As shown, the test device includes an experimental platform 1, a self-lifting reaction frame 2, a reaction wall back wall 3, a longitudinal force application system, a transverse force application system and a pier-support-beam-rail integrated structure 4 for the experiment. The pier-support-beam-rail integrated structure 4 includes a pier 41, a support 42, and two beam-rail structures 43, and the two beam-rail structures 43 are assembled into a holding beam-rail by a holding beam steel beam 5 and a holding beam rivet 6; that is, the left and right beam-rail structures are bundled together, that is, "holding the beam", so that the two beam-rail structures form a whole when loaded and can work together.

[0021] The self-lifting reaction frame 2, the reaction wall back 3 and the pier-support-beam-rail integrated structure 4 are all arranged on the experimental platform 1, and the reaction wall back wall 3 is located on one side of the self-lifting reaction frame 2; preferably, the experimental platform 1 is a reaction wall ground anchor groove, and the piers of the pier-support-beam-rail integrated structure 4 are fixed on the reaction wall ground anchor groove through ground anchor rods 13. The longitudinal force application system includes a hydraulic jack 7, which is arranged on the self-lifting reaction frame 2; the lateral force application system includes a servo hydraulic actuator 8, which is arranged on the reaction wall back wall 3; the pier-support-beam-rail integrated structure 4 is located directly below the hydraulic jack 7, and the servo hydraulic actuator 8 is aligned with the beam rail of the pier-support-beam-rail integrated structure 4, so that the influence of the participation of the beam rail, expansion joint and support can be considered in the test, and the synergistic effect of the pier-support-beam-rail multi-components cannot be considered, which solves the problem that the current research on pier mechanics and seismic performance cannot achieve the balance of the beam-rail structure.

[0022] Specifically, in the intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load arm test device described in this embodiment, there are two arm steel beams 5, which are arranged in parallel on the outside of the two beam-rail structures 43; both ends of the arm steel beam 5 are provided with rivet holes, and the arm rivets 6 anchor the two arm steel beams 5 together from both ends to assemble the two beam-rail structures 43 into an arm beam rail. The self-lifting reaction frame 2 includes a column 21 and a reaction beam 22 erected on the column 21, and the hydraulic jack 7 is suspended on the reaction beam 22 to apply a vertical reaction force to the pier-support-beam-rail integrated structure 4. The hydraulic jack 7 applies force to the arm beam rail of the pier-support-beam-rail integrated structure 4, and a load-sharing beam 9 is provided between the hydraulic jack 7 and the arm beam rail structure to evenly distribute the vertical axial force applied by the hydraulic jack 7 to the two beam rail structures 43. The servo hydraulic actuator 8 is arranged on the back wall 3 of the reaction wall through the actuator connecting steel bottom plate 10, so as to apply a lateral reaction force to the pier-support-beam-rail integrated structure 4; the servo hydraulic actuator 8 includes a mounting support, a telescopic force rod and a force end head, the mounting support is fixed on the actuator connecting steel bottom plate, the telescopic force rod can adjust the angle up and down around the mounting support, and the force end head is located at the front end of the telescopic force rod, and acts on the steel beam 5 of the beam rail. The intercity railway viaduct pier-support-beam rail integrated structure low-cycle reciprocating load arm test device and its use method described in this embodiment, when the servo hydraulic actuator applies force or displacement, the pier-support-beam rail integrated structure starts to work. The self-lifting reaction frame provides reaction force for the hydraulic jack, which is the sum of the deadweight of the tracks, trains, and other auxiliary structures on the actual bridge; the reaction wall back wall provides reaction force for the servo hydraulic actuator, which is the external load applied to the actual bridge (such as earthquake load, wind load, train braking load, etc.).

[0023] In addition, in the intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load gripper test device described in this embodiment, the lateral force application system also includes a fine leveling device 11, and the fine leveling device 11 is installed on the servo hydraulic actuator 8 and the reaction wall back wall 3, and is used to adjust the balance between the servo hydraulic actuator 8 and the pier-support-beam-rail integrated structure 4, that is, to adjust the servo hydraulic to adjust the position of the servo hydraulic actuator and the pier-support-beam-rail integrated structure and the reaction wall back wall, to ensure that the servo hydraulic actuator, the pier-support-beam-rail integrated structure specimen, and the reaction wall back wall centers can be maintained on the same center line. Specifically, the fine leveling device 11 includes a manual pulley and two steel hinges, one end of each of the steel hinges is connected to the telescopic force rod of the servo hydraulic actuator 8, and the manual pulley is installed on the back wall 3 of the reaction wall. The servo hydraulic actuator 8 is adjusted by adjusting the manual pulley to lower or raise the adjustment so that the intersection of the lateral axial force applied by the servo hydraulic actuator 8 and the vertical axial force applied by the hydraulic jack 7 is always maintained on the center line of the pier-support-beam-rail integrated structure 4.

[0024] In the intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device described in this embodiment, a rubber pad 12 is provided between the two beam-rail structures of the pier-support-beam-rail integrated structure 4, which is used to simulate the expansion joint between the main beams of an actual bridge. Because the bridge structures in the rail transit field range from a few to dozens or even hundreds of spans, the length of each span of the main beam is about 32 meters, and an expansion joint structure is provided between each span, making the test more accurate.

[0025] The method for using the intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device described in this embodiment includes the following steps: 1) Fix the self-lifting reaction frame on the anchor groove of the reaction wall, fix the servo hydraulic actuator on the back wall of the reaction wall, construct the pier, support, beam-rail structure into a complete pier-support-beam-rail integrated structure according to the requirements of the drawings, and fix the bottom of the pier component on the anchor groove of the reaction wall; 2) Tie the two beam-rail structures together with the pole steel beam and pole rivets to assemble them into a pole beam-rail. The compression degree of the rubber pad between the two beam-rail structures can be controlled by adjusting the pole rivets. 3) Connect the servo hydraulic actuator to the back wall of the reaction wall through the actuator connecting steel bottom plate, fix the servo hydraulic actuator on the back wall of the reaction wall, and install the fine leveling device on the servo hydraulic actuator and the back wall of the reaction wall to adjust the balance between the servo hydraulic actuator and the loaded specimen; 4) Fix the hydraulic jack on the self-lifting reaction frame, and place a load-sharing beam between the hydraulic jack and the beam rail to evenly distribute the axial force applied by the hydraulic jack to the left and right beam rail structures; 5) Apply the force end of the servo hydraulic actuator to the steel beam of the beam rail. After the servo hydraulic actuator and the hydraulic jack apply force or displacement, start the low-cycle reciprocating load test of the pier-support-beam rail integrated structure.

[0026] Therefore, the pole holding test device of the present invention also has the advantages of simple construction and manufacturing, convenient operation, stable use, and during the experiment, it can be installed and used without adjustment, simple operation, and no other auxiliary actions. The servo hydraulic actuator can realize the test loading, and has very good practical value.

[0027] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A low-cycle reciprocating load holding rod test device for an intercity railway viaduct pier-support-beam-rail integrated structure, characterized in that: It includes an experimental platform (1), a self-lifting reaction frame (2), a reaction wall back wall (3), a longitudinal force application system, a transverse force application system and a pier-support-beam rail integrated structure (4) used for the experiment; The pier-support-beam-rail integrated structure (4) comprises a pier (41), a support (42), and two beam-rail structures (43); the two beam-rail structures (43) are assembled into a spar beam-rail by means of a spar steel beam (5) and a spar rivet (6); The self-elevating reaction frame (2), the reaction wall back (3) and the pier-support-beam rail integrated structure (4) are all arranged on the experimental platform (1), and the reaction wall back (3) is located on one side of the self-elevating reaction frame (2); The longitudinal force application system comprises a hydraulic jack (7) which is arranged on the self-lifting reaction frame (2); the lateral force application system comprises a servo hydraulic actuator (8) which is arranged on the reaction wall back wall (3); The pier-support-beam-rail integrated structure (4) is located directly below the hydraulic jack (7), and the servo hydraulic actuator (8) is aligned with the beam-rail of the pier-support-beam-rail integrated structure (4).

2. The intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device according to claim 1, characterized in that: There are two arm-holding steel beams (5), which are arranged in parallel on the outside of the two beam-rail structures (43); rivet holes are provided at both ends of the arm-holding steel beams (5), and the arm-holding rivets (6) anchor the two arm-holding steel beams (5) together from both ends, thereby assembling the two beam-rail structures (43) into an arm-holding beam rail.

3. The intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device according to claim 1, characterized in that: The self-lifting reaction frame (2) comprises a column (21) and a reaction beam (22) erected on the column (21); the hydraulic jack (7) is suspended on the reaction beam (22) to apply a vertical reaction force to the pier-support-beam-rail integrated structure (4).

4. The intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device according to claim 3, characterized in that: The hydraulic jack (7) applies force to the arm beam rail of the pier-support-beam rail integrated structure (4), and a load-sharing beam (9) is provided between the hydraulic jack (7) and the arm beam rail structure to evenly distribute the vertical axial force applied by the hydraulic jack (7) to the two beam rail structures (43).

5. The intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device and its use method according to claim 1, characterized in that: The servo hydraulic actuator (8) is arranged on the back wall (3) of the reaction wall through the actuator connecting steel bottom plate (10) to apply a lateral reaction force to the pier-support-beam rail integrated structure (4); the servo hydraulic actuator (8) comprises a mounting support, a telescopic force application rod and a force application end head, the mounting support is fixed on the actuator connecting steel bottom plate, the telescopic force application rod can adjust the angle up and down around the mounting support, and the force application end head is located at the front end of the telescopic force application rod and acts on the arm steel beam (5) of the arm beam rail.

6. The intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device according to claim 5, characterized in that: The lateral force application system also includes a fine-leveling device (11), which is installed on the servo hydraulic actuator (8) and the reaction wall back wall (3) to adjust the balance between the servo hydraulic actuator (8) and the pier-support-beam-rail integrated structure (4).

7. The intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device according to claim 6, characterized in that: The fine leveling device (11) comprises a manual pulley and two steel hinges, one end of each of the steel hinges is connected to a telescopic force-applying rod of a servo hydraulic actuator (8), and the manual pulley is mounted on a reaction wall back wall (3). The servo hydraulic actuator (8) is adjusted by adjusting the manual pulley to lower or raise the servo hydraulic actuator (8), so that the intersection of the lateral axial force applied by the servo hydraulic actuator (8) and the vertical axial force applied by the hydraulic jack (7) is always maintained on the center line of the pier-support-beam-rail integrated structure (4).

8. The intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device according to claim 1, characterized in that: A rubber pad (12) is provided between the two beam-rail structures of the pier-support-beam-rail integrated structure (4).

9. The intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device according to claim 1, characterized in that: The experimental platform (1) is a reaction wall ground anchor groove, and the piers of the pier-support-beam-rail integrated structure (4) are fixed on the reaction wall ground anchor groove via ground anchor rods (13).

10. The method for using the intercity railway viaduct pier-support-beam-rail integrated structure low-cycle reciprocating load holding rod test device according to any one of claims 1 to 9, characterized in that: The steps include: 1) Fix the self-lifting reaction frame on the anchor groove of the reaction wall, fix the servo hydraulic actuator on the back wall of the reaction wall, construct the pier, support, beam-rail structure into a complete pier-support-beam-rail integrated structure according to the requirements of the drawings, and fix the bottom of the pier component on the anchor groove of the reaction wall; 2) Tie the two beam-rail structures together with the pole steel beam and pole rivets to assemble them into a pole beam-rail. The compression degree of the rubber pad between the two beam-rail structures can be controlled by adjusting the pole rivets. 3) Connect the servo hydraulic actuator to the back wall of the reaction wall through the actuator connecting steel bottom plate, fix the servo hydraulic actuator on the back wall of the reaction wall, and install the fine leveling device on the servo hydraulic actuator and the back wall of the reaction wall to adjust the balance between the servo hydraulic actuator and the loaded specimen; 4) Fix the hydraulic jack on the self-lifting reaction frame, and place a load-sharing beam between the hydraulic jack and the beam rail to evenly distribute the axial force applied by the hydraulic jack to the left and right beam rail structures; 5) Apply the force end of the servo hydraulic actuator to the steel beam of the beam rail. After the servo hydraulic actuator and the hydraulic jack apply force or displacement, start the low-cycle reciprocating load test of the pier-support-beam rail integrated structure.

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