Concrete simply supported beam static load test reaction frame and static load test method

Abstract

The invention provides a concrete simply supported beam static load test reaction frame and a static load test method.The reaction frame comprises a base, a supporting assembly arranged on the base, a pressurizing assembly arranged on the supporting assembly and a test station jointly defined by the base, the supporting assembly and the pressurizing assembly; wherein the supporting assembly further comprises steel trusses arranged at the two ends of the base in the length direction of the base, after the to-be-tested concrete beam is arranged on the test station in a matched mode, the pressurizing assembly is erected on the steel trusses so that a static load test can be conducted, in the test process, large hoisting equipment does not need to move repeatedly, and the steel trusses do not need to be installed; the distance between the steel trusses can be adjusted according to the beam width and the beam length of concrete to be measured, the device can be suitable for various beam bodies of different specifications, the input of materials in the construction process is saved, and the device has the advantages of being simple in structure, simplifying the construction procedure, reducing the construction risk, reducing the construction cost and improving the construction efficiency. And popularization and implementation are facilitated.

Description

Technical Field

[0001] The present application belongs to the technical field of bridge engineering, and specifically relates to a static load test reaction frame and a static load test method for a concrete simply supported beam. Background Art

[0002] In the prior art, the static load test of a simply supported concrete beam is a test method used to evaluate the performance of a concrete beam under static load. In this test, the reaction frame plays a vital role in providing and maintaining stable loading on the concrete beam. The reaction frame must be designed to withstand the forces generated during the test and ensure the accuracy and safety of the loading.

[0003] In the prior art, during the construction of a bridge project, after the beam body is produced, a specified number of finished beams need to be subjected to a static load test. The existing static load test device generally uses a customized steel truss for testing. The steel truss is erected above the beam body to be tested, and then the two ends of the steel truss are anchored to the ground or a beam with a steel strand before a static load test is performed. The existing concrete simply supported beam static load test reaction frame steel truss is generally located above the beam body to be tested, and large-scale lifting equipment is required for static load testing. Moreover, this reaction frame is generally only applicable to one beam length. When there are many types of beam lengths in the beam manufacturing site, different types of reaction frames need to be set for different beam lengths, which increases the construction cost and is not efficient. Therefore, there is an urgent need for a concrete simply supported beam static load test reaction frame with strong adaptability that can be used for static load tests on beams of different lengths and specifications. Summary of the invention

[0004] In order to solve the technical problems in the prior art that, during the static load test of concrete beams for bridge construction, customized steel trusses are generally used for testing, the steel trusses are erected above the beam to be tested, and the two ends of the steel trusses are anchored to the ground or beams with steel strands before the static load test is carried out, large-scale lifting equipment is required for the static load test, and such reaction frames are generally only applicable to one beam length, have poor applicability, and cannot meet the actual construction needs of bridges, the present application proposes a static load test reaction frame for concrete simply supported beams.

[0005] In order to solve the technical problem raised by the present application, the present application also provides a static load test method for a concrete simply supported beam.

[0006] The present application adopts the following scheme: a concrete simply supported beam static load test reaction frame, including a base, a support assembly arranged on the base, a pressure assembly arranged on the support assembly, and a test station formed by the base, the support assembly and the pressure assembly. The concrete beam to be tested can be set on the test station, the support assembly includes a steel truss arranged on both ends of the base along the length direction of the base, and the pressure assembly is mounted on the steel truss to apply pressure to the concrete beam to be tested.

[0007] In one embodiment, the steel truss includes a lower chord arranged on the end of the base, an upper chord arranged on the lower chord, and a reinforcement rod group arranged between the upper chord and the lower chord, the pressure assembly is mounted on the upper chord, and the steel truss is used to support the pressure assembly.

[0008] In one embodiment, the reinforcing rod group includes inclined rods arranged alternately along the length direction of the upper / lower chord rods, and a vertical rod arranged between two adjacent inclined rods, wherein the vertical rod is perpendicular to the lower chord rod, and an angle A is arranged between two adjacent inclined rods, and an angle B is arranged between each inclined rod and the lower chord rod, and the degree of the angle A satisfies the following relationship: 60°≤angle A≤90°; and the degree of the angle B satisfies the following relationship: 45°≤angle B≤60°.

[0009] In one embodiment, the base includes a plurality of base beams spaced apart along the length direction of the lower chord, the plurality of base beams are symmetrically arranged at both ends of the lower chord along the length direction of the lower chord, the concrete beam to be tested can be mounted on the plurality of base beams, and the pressure assembly is mounted on the upper chord to apply pressure to the concrete beam to be tested.

[0010] In one embodiment, the base beam includes a main beam, a first connecting portion arranged at both ends of the main beam along the length direction of the main beam, and a first pad arranged between the two first connecting portions. The base beam is detachably connected to the lower chord through the first connecting portion. When the concrete beam to be tested is erected on the base beam, the first pad is arranged on the main beam at a position corresponding to the concrete beam to be tested.

[0011] In one embodiment, the first connecting portion includes two connecting ear plates spaced apart on the end portions of the main beam, the two connecting ear plates together enclosing a connecting groove, a first connecting hole passing through the two connecting ear plates, and a connecting pin matchingly passing through the first connecting hole, and the lower chord rod can be matched in the connecting groove so that the lower chord rod can be removably mounted on the main beam.

[0012] In one embodiment, the pressurizing assembly includes a crossbeam mounted on the upper chord, second connecting parts arranged on both ends of the crossbeam along the length direction of the crossbeam, and a jack arranged between the two second connecting parts, the crossbeam is detachably connected to the upper chord via the second connecting parts, and when the concrete beam to be tested is placed on the test station, the jack is used to apply pressure to the upper surface of the concrete beam to be tested.

[0013] In one of the embodiments, the second connecting portion includes a tension steel bar group provided on the end of the crossbeam, and a second connecting hole provided on the upper chord at a position corresponding to the tension steel bar group. The tension steel bar group can be matched and extended into the second connecting hole so that the crossbeam can be detachably provided on the upper chord.

[0014] In one embodiment, along the height direction of the vertical rod, the second connecting hole and the vertical rod are located in the same straight line position, and when the cross beam is mounted on the upper chord, along the length direction of the cross beam, the second connecting hole and the jack are located in the same straight line position.

[0015] In one of the embodiments, it also includes a beam delivery assembly, which includes a sliding seat arranged on a reference plane, and a second pad block group arranged on the sliding seat at a position corresponding to the concrete beam to be tested. Both ends of the concrete beam to be tested can be mounted on the second pad block group to slide relative to the reference plane through the sliding seat.

[0016] In order to solve the technical problem raised by the present application, the present application also provides a static load test method for a concrete simply supported beam, comprising the following steps:

[0017] Step 101. Design and manufacture a base, a support assembly and a pressure assembly in sequence according to the specifications of the concrete beam to be tested. After the manufacture is completed, the support assembly is arranged on the base, and the pressure assembly is mounted on the support assembly to form the above-mentioned reaction frame for static load test of a concrete simply supported beam;

[0018] Step 102: The concrete beam to be tested is transported to a test station formed by a base, a support assembly and a pressurizing assembly by means of a beam transport assembly, and the pressure output end of the pressurizing assembly is fitted to the upper surface of the concrete beam to be tested;

[0019] Step 103. Conduct a static load test. When the concrete beam to be tested is matched and placed on the test station, start the pressurizing component so that the output end of the pressurizing component outputs pressure on the upper surface of the concrete beam to be tested. When the pressure at the output end of the pressurizing component reaches the value set in the standard range, the static load test is completed, and the concrete beam to be tested is transported to the designated storage station through the beam delivery component.

[0020] Compared with the prior art, this application has the following beneficial effects:

[0021] The present application provides a reaction frame and a static load test method for a concrete simply supported beam, wherein the reaction frame includes a base, a support assembly arranged on the base, a pressure assembly arranged on the support assembly, and a test station enclosed by the above three, wherein the support assembly also includes steel trusses arranged on both ends of the base along the length direction of the base. After the concrete beam to be tested is matched and arranged on the test station, the pressure assembly is erected on the steel truss to carry out a static load test. During the test, there is no need for large-scale lifting equipment to repeatedly move and install the steel truss, which saves resource investment and speeds up the construction progress. The distance between the steel trusses can be adjusted according to the beam width and beam length of the concrete to be tested, and can be applied to beams of various specifications, saving material investment during the construction process. It has the advantages of simple structure, simplified construction process, reduced construction risk, reduced construction cost, and easy promotion and implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a diagram of the use status of a reaction frame for a static load test of a concrete simply supported beam in the present application;

[0023] Figure 2 This application Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 This application Figure 2 A partial enlarged view of point B in the middle;

[0025] Figure 4 It is a structural schematic diagram of the steel truss of the present application;

[0026] Figure 5 It is a schematic diagram of the structure of the pressurized assembly of the present application after the jack is removed;

[0027] Figure 6 It is a structural schematic diagram of the base of this application;

[0028] Figure 7 It is a schematic diagram of the state in which the concrete beam to be tested in this application is transported to the reaction frame of the concrete simply supported beam static load test through the beam delivery assembly;

[0029] Figure 8 This is a diagram of the use status of a concrete simply supported beam static load test reaction frame for a concrete beam to be tested of a certain specification;

[0030] Fig. 9 This is a diagram of the use status of a concrete simply supported beam static load test reaction frame for a concrete beam to be tested of a certain specification;

[0031] Fig.10 This application Fig. 9 A partial enlarged view of point C in the middle;

[0032] Fig.11This application Fig. 9 A partial enlarged view of point D in the middle;

[0033] Fig.12 This is a usage status diagram of a concrete simply supported beam static load test reaction frame for a concrete beam to be tested in a certain specification. DETAILED DESCRIPTION

[0034] Combination Figure 1-12 The content shown further illustrates the technical solution provided by the present application, a concrete simply supported beam static load test reaction frame, comprising a base 1, a support assembly 2 arranged on the base 1, a pressure assembly 3 arranged on the support assembly 2, and a test station formed by the base 1, the support assembly 2 and the pressure assembly 3. The concrete beam to be tested can be set on the test station, the support assembly 2 includes a steel truss 20 arranged on both ends of the base 1 along the length direction of the base 1, and the pressure assembly 3 is erected on the steel truss 20 to apply pressure to the concrete beam to be tested.

[0035] The present application provides a reaction frame and a static load test method for a concrete simply supported beam, wherein the reaction frame includes a base, a support assembly arranged on the base, a pressure assembly arranged on the support assembly, and a test station enclosed by the above three, wherein the support assembly also includes steel trusses arranged on both ends of the base along the length direction of the base. After the concrete beam to be tested is matched and arranged on the test station, the pressure assembly is erected on the steel truss to carry out a static load test. During the test, there is no need for large-scale lifting equipment to repeatedly move and install the steel truss, which saves resource investment and speeds up the construction progress. The distance between the steel trusses can be adjusted according to the beam width and beam length of the concrete to be tested, and can be applied to beams of various specifications, saving material investment during the construction process. It has the advantages of simple structure, simplified construction process, reduced construction risk, reduced construction cost, and easy promotion and implementation.

[0036] During the actual implementation of this embodiment, the steel truss 20 includes a lower chord 21 arranged on the end of the base 1, an upper chord 22 arranged on the lower chord 21, and a reinforcing rod group 23 arranged between the upper chord 22 and the lower chord 21. The pressure component 3 is mounted on the upper chord 22, and the steel truss 20 is used to support the pressure component 3.

[0037] During the actual implementation of this embodiment, the reinforcing rod group 23 includes inclined rods 24 arranged alternately along the length direction of the upper chord rod 22 and / or the lower chord rod 21, and a vertical rod 25 arranged between two adjacent inclined rods 24, the vertical rod 25 is perpendicular to the lower chord rod 21, an angle A is provided between two adjacent inclined rods 24, and an angle B is provided between each inclined rod 24 and the lower chord rod 21, the degree of the angle A satisfies the following relationship: 60°≤angle A≤90°, and the degree of the angle B satisfies the following relationship: 45°≤angle B≤60°.

[0038] During the actual implementation, the degree of angle A is 60°, the degree of angle B is 60°, and the inclined rod, the upper chord rod and the lower chord rod together form an equilateral triangle, which can effectively improve the compressive strength of the steel truss and ensure the safety of bridge construction.

[0039] During the actual implementation of this embodiment, the base 1 includes a plurality of base beams 10 arranged at intervals along the length direction of the lower chord 21, and the plurality of base beams 10 are symmetrically arranged at the two ends of the lower chord 21 along the length direction of the lower chord 21. The concrete beam to be tested can be mounted on the plurality of base beams 10, and the pressure component 3 is mounted on the upper chord 22 to apply pressure to the concrete beam to be tested.

[0040] During the actual implementation of this embodiment, the base beam 10 includes a main beam 11, a first connecting portion 12 arranged at both ends of the main beam 11 along the length direction of the main beam 11, and a first cushion block 13 arranged between the two first connecting portions 12. The base beam 10 is detachably connected to the lower chord 21 through the first connecting portion 12. When the concrete beam to be tested is erected on the base beam 10, the first cushion block 13 is arranged on the main beam 11 at a corresponding position of the concrete beam to be tested.

[0041] During the actual implementation of this embodiment, the first connecting portion 12 includes two connecting ear plates 120 spaced apart on the end of the main beam 11, the two connecting ear plates 120 together enclose a connecting groove 121, a first connecting hole 122 passing through the two connecting ear plates 120, and a connecting pin 123 matchingly passing through the first connecting hole 122, and the lower chord rod 21 can be matched and arranged in the connecting groove 121, so that the lower chord rod 21 can be removably arranged on the main beam 11.

[0042] During the actual implementation of this embodiment, the pressurizing assembly 3 includes a crossbeam 30 mounted on the upper chord 22, a second connecting portion 31 provided on both ends of the crossbeam 30 along the length direction of the crossbeam 30, and a jack 32 provided between the two second connecting portions 31. The crossbeam 30 is detachably connected to the upper chord 22 via the second connecting portion 31. When the concrete beam to be tested is placed on the test station, the jack 32 is used to apply pressure to the upper surface of the concrete beam to be tested.

[0043] During the actual implementation of this embodiment, the second connecting portion 31 includes a tension steel bar group 310 arranged on the end of the crossbeam 30, and a second connecting hole 311 arranged on the upper chord 22 at a position corresponding to the tension steel bar group 310. The tension steel bar group 310 can be matched and extended into the second connecting hole 311, so that the crossbeam 30 can be detachably arranged on the upper chord 22.

[0044] During the actual implementation, along the height direction of the vertical rod, the second connecting hole and the vertical rod are located in the same straight line position. When the crossbeam is erected on the upper chord, along the length direction of the crossbeam, the second connecting hole and the jack are located in the same straight line position. This can effectively avoid the pressure application direction and the reinforcing rod group leaving an angle directly during the jack pressurization process. On the one hand, it can effectively improve the test accuracy, and on the other hand, it can avoid damage to the steel truss during the jack pressurization process, effectively ensuring construction safety.

[0045] During the actual implementation of this embodiment, it also includes a beam delivery assembly 4, which includes a sliding seat 40 arranged on a reference plane, and a second pad block group 41 arranged on the sliding seat 40 at a position corresponding to the concrete beam to be tested. Both ends of the concrete beam to be tested can be mounted on the second pad block group 41 to slide relative to the reference plane through the sliding seat 40.

[0046] In order to solve the technical problem raised by the present application, the present application also provides a static load test method for a concrete simply supported beam, comprising the following steps:

[0047] Step 101. Design and manufacture a base, a support assembly and a pressure assembly in sequence according to the specifications of the concrete beam to be tested. After the manufacture is completed, the support assembly is arranged on the base, and the pressure assembly is mounted on the support assembly to form the above-mentioned reaction frame for static load test of a concrete simply supported beam;

[0048] Step 102: The concrete beam to be tested is transported to a test station formed by a base, a support assembly and a pressurizing assembly by means of a beam transport assembly, and the pressure output end of the pressurizing assembly is fitted to the upper surface of the concrete beam to be tested;

[0049] Step 103. Conduct a static load test. When the concrete beam to be tested is matched and placed on the test station, start the pressurizing component so that the output end of the pressurizing component outputs pressure on the upper surface of the concrete beam to be tested. When the pressure at the output end of the pressurizing component reaches the value set in the standard range, the static load test is completed, and the concrete beam to be tested is transported to the designated storage station through the beam delivery component.

[0050] During the actual implementation, the installation steps of the static load test reaction frame are as follows: the base is set on the ground, and the top of the base is flush with the ground elevation to facilitate the entry of the beam assembly. After the base is fixed, the steel truss is set at both ends of the detachable base along the length direction of the base through the first connection part, and then the first pad is set in the middle of the base as a support point for the concrete beam to be tested, and the connection strength between the steel truss and the base is strengthened with a connecting pin. When the pressure assembly is set on the steel truss through the second connection part, the installation of the static load test reaction frame is completed.

[0051] The present application provides a reaction frame and a static load test method for a concrete simply supported beam, wherein the reaction frame includes a base, a support assembly arranged on the base, a pressure assembly arranged on the support assembly, and a test station enclosed by the above three, wherein the support assembly also includes steel trusses arranged on both ends of the base along the length direction of the base. After the concrete beam to be tested is matched and arranged on the test station, the pressure assembly is erected on the steel truss to carry out a static load test. During the test, there is no need for large-scale lifting equipment to repeatedly move and install the steel truss, which saves resource investment and speeds up the construction progress. The distance between the steel trusses can be adjusted according to the beam width and beam length of the concrete to be tested, and can be applied to beams of various specifications, saving material investment during the construction process. It has the advantages of simple structure, simplified construction process, reduced construction risk, reduced construction cost, and easy promotion and implementation.

[0052] The above are only embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reaction frame for static load test of concrete simply supported beam, characterized in that: The invention comprises a base (1), a support assembly (2) arranged on the base (1), a pressure assembly (3) arranged on the support assembly (2), and a test station formed by the base (1), the support assembly (2) and the pressure assembly (3). The concrete beam to be tested can be arranged on the test station. The support assembly (2) comprises a steel truss (20) arranged on both ends of the base (1) along the length direction of the base (1). The pressure assembly (3) is mounted on the steel truss (20) to apply pressure to the concrete beam to be tested.

2. A reaction frame for static load test of a concrete simply supported beam according to claim 1, characterized in that: The steel truss (20) comprises a lower chord (21) arranged on the end of the base (1), an upper chord (22) arranged on the lower chord (21), and a reinforcing rod group (23) arranged between the upper chord (22) and the lower chord (21); the pressurizing component (3) is mounted on the upper chord (22); and the steel truss (20) is used to support the pressurizing component (3).

3. A reaction frame for static load test of concrete simply supported beam according to claim 2, characterized in that: The reinforcing rod group (23) comprises inclined rods (24) arranged in a staggered manner along the length direction of the upper chord rod (22) and / or the lower chord rod (21), and a vertical rod (25) arranged between two adjacent inclined rods (24), wherein the vertical rod (25) is perpendicular to the lower chord rod (21), an angle A is arranged between two adjacent inclined rods (24), and an angle B is arranged between each inclined rod (24) and the lower chord rod (21), wherein the degree of the angle A satisfies the following relationship: 60°≤angle A≤90°, and the degree of the angle B satisfies the following relationship: 45°≤angle B≤60°.

4. A reaction frame for static load test of concrete simply supported beam according to claim 2, characterized in that: The base (1) comprises a plurality of base beams (10) arranged at intervals along the length direction of the lower chord (21); the plurality of base beams (10) are symmetrically arranged at two ends of the lower chord (21) along the length direction of the lower chord (21); the concrete beam to be tested can be mounted on the plurality of base beams (10); and the pressure component (3) is mounted on the upper chord (22) to apply pressure to the concrete beam to be tested.

5. A reaction frame for static load test of concrete simply supported beam according to claim 4, characterized in that: The base beam (10) comprises a main beam (11), first connecting parts (12) arranged at two ends of the main beam (11) along the length direction of the main beam (11), and a first cushion block (13) arranged between the two first connecting parts (12); the base beam (10) is detachably connected to the lower chord (21) via the first connecting parts (12); when the concrete beam to be tested is erected on the base beam (10), the first cushion block (13) is arranged on the main beam (11) at a position corresponding to the concrete beam to be tested.

6. A reaction frame for static load test of simply supported concrete beams according to claim 5, characterized in that: The first connecting portion (12) comprises two connecting ear plates (120) spaced apart on the ends of the main beam (11), the two connecting ear plates (120) together enclosing a connecting groove (121), a first connecting hole (122) passing through the two connecting ear plates (120), and a connecting pin (123) matchingly passing through the first connecting hole (122), and the lower chord (21) can be matchedly arranged in the connecting groove (121) so that the lower chord (21) can be detachably arranged on the main beam (11).

7. A reaction frame for static load test of simply supported concrete beams according to claim 2, characterized in that: The pressurizing assembly (3) comprises a crossbeam (30) mounted on the upper chord (22), second connecting parts (31) arranged on both ends of the crossbeam (30) along the length direction of the crossbeam (30), and a jack (32) arranged between the two second connecting parts (31); the crossbeam (30) is detachably connected to the upper chord (22) via the second connecting part (31); when the concrete beam to be tested is placed on the test station, the jack (32) is used to apply pressure to the upper surface of the concrete beam to be tested.

8. A reaction frame for static load test of simply supported concrete beams according to claim 7, characterized in that: The second connection portion (31) includes a tension steel bar group (310) arranged on the end of the cross beam (30), and a second connection hole (311) arranged on the upper chord (22) at a position corresponding to the tension steel bar group (310). The tension steel bar group (310) can be matched and extended into the second connection hole (311) so that the cross beam (30) can be detachably arranged on the upper chord (22).

9. A reaction frame for static load test of simply supported concrete beams according to claim 1, characterized in that: The invention also comprises a beam delivery assembly (4), wherein the beam delivery assembly (4) comprises a sliding seat (40) arranged on a reference plane, and a second pad block group (41) arranged on the sliding seat (40) at a position corresponding to the concrete beam to be tested, and both ends of the concrete beam to be tested can be mounted on the second pad block group (41) to slide relative to the reference plane through the sliding seat (40).

10. A static load test method for a simply supported concrete beam, characterized in that: The following steps are involved: Step 101. Design and manufacture a base, a support assembly and a pressure assembly in sequence according to the specifications of the concrete beam to be tested. After the manufacture is completed, the support assembly is arranged on the base, and the pressure assembly is mounted on the support assembly to form a concrete simply supported beam static load test reaction frame according to any one of claims 1 to 9; Step 102: The concrete beam to be tested is transported to a test station formed by a base, a support assembly and a pressurizing assembly by means of a beam transport assembly, and the pressure output end of the pressurizing assembly is fitted to the upper surface of the concrete beam to be tested; Step 103. Conduct a static load test. When the concrete beam to be tested is matched and placed on the test station, start the pressurizing component so that the output end of the pressurizing component outputs pressure on the upper surface of the concrete beam to be tested. When the pressure at the output end of the pressurizing component reaches the value set in the standard range, the static load test is completed, and the concrete beam to be tested is transported to the designated storage station through the beam delivery component.

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