End clamping and supporting clamp for RC column lateral impact test

Abstract

The utility model discloses an end part clamping and supporting clamp for a lateral impact test of an RC column. The end part clamping and supporting clamp comprises two clamping blocks and a steel base, each clamping block is of a cuboid structure, a rectangular groove is formed in one side face of each clamping block, the side faces, provided with the rectangular grooves, of the two clamping blocks are oppositely arranged, and the two rectangular grooves form a rectangular through hole. Each clamping block is provided with two groups of opposite-pull screw rod holes, the two groups of opposite-pull screw rod holes are respectively formed in the two sides of the rectangular groove, and opposite-pull screw rods are arranged in the opposite-pull screw rod holes, so that the connection of the two clamping blocks is realized; and the clamping blocks are fixed on the steel base through bolts. The test column has the advantages of high rigidity, high strength, large clamping force, simple structure and the like, the test column is simple to mount and dismount and convenient to use, the test efficiency can be improved, potential safety hazards are reduced, the test column can be repeatedly used after being manufactured and formed at a time, and the test cost is reduced.

Description

Technical Field

[0001] The utility model relates to an end fixing clamp used for RC (reinforced concrete) column lateral impact test. Background Art

[0002] In recent years, accidents involving collisions between vehicles and ships and bridge piers have become common. These accidents can cause varying degrees of damage to the bridge piers. In severe cases, they can also cause the collapse of the upper bridge structure, resulting in serious casualties and economic losses. When subjected to horizontal dynamic effects such as collisions between vehicles and ships, vertical load-bearing bridge piers will exhibit mechanical behaviors and damage characteristics that are different from those of static effects, which will affect the bearing capacity, stability and safety of the bridge piers. Therefore, the horizontal impact resistance of bridge piers is an issue worthy of attention. At present, scholars in the field of engineering structures often use model tests and finite element analysis, among which model tests are particularly important for the study of such complex stress behaviors.

[0003] At present, in the simulated impact test of structural columns, the column specimens are often cast together with the heavy and large foundation base. Although the integral casting of the column and the foundation base can better simulate the fixed support constraint at the bottom of the column, the installation and anchoring of the foundation base have relatively high requirements for the test device, and the heavy base often becomes loose or slides due to insufficient anchoring during the test. When the column and the foundation base are cast in place as a whole, the process of template production and support system is relatively complicated. When the number of column specimens is large, the test cost of the overall casting will be high, and the construction period is long, which is not conducive to the development of experimental research. The end fixing clamp designed by the utility model for the specimen column does not need to make a heavy and large foundation base, but only needs to make the column specimen. In this way, the template production and support system are relatively simple, which can greatly reduce the production cost of the specimen column. The end support fixture is composed of a grooved high-strength steel component and an outer layer of high-strength reinforced concrete. It is fixed and anchored by high-strength tension screws to ensure that the fixture has greater rigidity, strength and stability, avoiding loosening and sliding. It can also be manufactured once and used repeatedly, and the installation and disassembly of the test column is relatively simple, which can also improve the test efficiency and save costs. Summary of the invention

[0004] In order to solve the above technical problems, the utility model provides an end fixing fixture for RC column lateral impact test which has simple structure, low cost, convenient installation and disassembly of test specimens and improved test efficiency.

[0005] The technical solution adopted by the utility model is:

[0006] An end fixing fixture for RC column lateral impact test comprises two clamping blocks and a steel base; the clamping block is a rectangular parallelepiped structure, one side of which is provided with a rectangular groove, the sides of the two clamping blocks provided with the rectangular grooves are arranged opposite to each other, and the two rectangular grooves form a rectangular through hole; the clamping block is provided with two groups of tension screw holes, the two groups of tension screw holes are respectively arranged on both sides of the rectangular groove, and tension screws are arranged in the tension screw holes to realize the connection of the two clamping blocks; the clamping block is fixed to the steel base by bolts.

[0007] Furthermore, a T-shaped slot is provided on the top surface of the steel base, a T-shaped bolt is provided in the T-shaped slot, and the T-shaped bolt passes through the bolt hole of the clamping block and is fixed to the clamping block by a nut.

[0008] Furthermore, a gasket is provided between the nut and the clamping block.

[0009] Furthermore, the number of the tension screw holes in each group of tension screw holes is three; and each clamping block is fixed to the steel base by four T-bolts.

[0010] Furthermore, the clamping block includes a steel frame; the steel frame includes a bottom plate, two vertical plates, two top plates and a U-shaped groove plate; the two vertical plates are parallel, and the vertical plates are welded to the bottom plate perpendicular to the bottom plate; the bottom wall of the U-shaped groove plate is welded to the top of the two vertical plates, and the bottom wall of the U-shaped groove plate is parallel to the bottom plate; the two top plates are respectively welded to the top of the two side walls of the U-shaped groove plate; and the relative end faces of the two top plates are respectively flush with the inner walls of the two side walls of the U-shaped groove plate; reinforced concrete is poured in the groove between the top plate and the bottom plate and in the through hole between the two vertical plates.

[0011] Furthermore, ribs I and II are provided between the two vertical plates, the top surface of rib I is welded to the bottom wall of the U-shaped groove plate, and the two side surfaces of rib I are respectively welded to the two vertical plates; the bottom surface of rib II is welded to the bottom plate, and the two side surfaces of rib II are respectively welded to the two vertical plates; a triangular reinforcing rib I is welded between the top plate and the side wall of the corresponding U-shaped groove plate; a triangular reinforcing rib II is welded between the outer side of the vertical plate and the bottom plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model not only has the advantages of high rigidity, high strength, large clamping force, simple structure, etc., but also the installation and disassembly of the test column are simple and easy to use, which can improve the test efficiency and reduce safety hazards. The utility model can be used repeatedly after being manufactured once, which reduces the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model.

[0015] Figure 2It is a structural diagram of the clamping block of the utility model.

[0016] Figure 3 It is a three-dimensional diagram of the steel frame of the clamping block of the utility model.

[0017] In the figure: 1-column specimen, 2-clamp, 3-tension screw, 4-bolt, 5-nut, 6-washer, 7-steel base, 8-anchor bolt, 9-hexagonal nut, 10-washer, 11-foundation, 12-steel skeleton, 13-reinforced concrete, 14-tension screw hole, 15-bolt hole, 16-reinforcement rib I, 17-rib I, 18-bottom plate, 19-vertical plate, 20-top plate, 21-U-shaped groove plate, 22-rib II, 23-reinforcement rib II. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] like Figure 1-3 As shown, the utility model includes two clamping blocks 2 and a steel base 7; the clamping block 2 is a rectangular parallelepiped structure, and a rectangular groove 2-1 is provided on one side thereof. The sides of the two clamping blocks 2 provided with the rectangular groove 2-1 are arranged opposite to each other, and the two rectangular grooves 2-1 form a rectangular through hole. The clamping block is provided with two groups of tension screw holes and two groups of bolt holes, and the two groups of tension screw holes 14 are respectively arranged on both sides of the rectangular groove, with three in each group. Two groups of bolt holes 15 are respectively arranged on both sides of the rectangular groove, with two in each group.

[0020] The tension screw hole 14 is arranged perpendicular to the bottom surface of the rectangular groove 21. A tension screw 4 is arranged in the tension screw hole 14 to realize the connection between the two clamping blocks 2 and fixed by a nut 5, and a gasket 6 is arranged between the nut 5 and the clamping block. The bolt hole is parallel to the bottom surface of the rectangular groove 21 and perpendicular to the tension screw hole 14. The clamping block 2 is fixed to the steel base by bolts 4. A T-slot is arranged on the top surface of the steel base 7, and the bolt 4 is a T-bolt, and the bolt head of the T-bolt is arranged in the T-slot. The T-bolt passes through the bolt hole 15 of the clamping block 2 and is fixed to the clamping block 2 by a nut. A gasket 6 is arranged between the nut and the clamping block. The steel base 7 is fixed to the foundation 11 by a plurality of anchor bolts 8.

[0021] The clamp block 2 includes a steel frame 12; the steel frame 12 includes a bottom plate 18, two vertical plates 19, two top plates 20 and a U-shaped groove plate 21; the two vertical plates 19 are parallel, and the vertical plates 19 are welded to the bottom plate 18 perpendicularly. The bottom wall of the U-shaped groove plate 21 is welded to the top of the two vertical plates 19, and the bottom wall of the U-shaped groove plate 21 is parallel to the bottom plate 18. The two top plates 20 are respectively welded to the top of the two side walls of the U-shaped groove plate 21; and the opposite end surfaces of the two top plates 20 are respectively flush with the inner walls of the two side walls of the U-shaped groove plate. Rib plate I17 and rib plate II22 are arranged between the two vertical plates 19, the top surface of rib plate I17 is welded to the bottom wall of the U-shaped groove plate 21, and the two side surfaces of rib plate I17 are respectively welded to the two vertical plates 19. The bottom surface of rib plate II22 is welded to the bottom plate, and the two side surfaces of rib plate II22 are respectively welded to the two vertical plates 19. A triangular reinforcing rib 16 is welded between the top plate 20 and the side wall of the corresponding U-shaped groove plate 21. A triangular reinforcing rib II 23 is welded between the outer side of the vertical plate 19 and the bottom plate 18. Reinforced concrete 13 is poured in the groove between the top plate 20 and the bottom plate 18 and in the through hole between the two vertical plates 19.

[0022] The specific manufacturing process of the clamp block 2 is as follows: first, the steel frame 12 is processed and manufactured, then the reinforced concrete 13 is poured, and through-holes for tension screws 14 and bolt holes 15 are reserved, and the manufacturing of a single clamp block 2 is completed after the concrete is cured and formed.

Claims

1. An end clamp for RC column lateral impact test, characterized by: It includes two clamping blocks and a steel base; the clamping block is a rectangular parallelepiped structure, one side of which is provided with a rectangular groove, the sides of the two clamping blocks provided with the rectangular grooves are arranged opposite to each other, and the two rectangular grooves form a rectangular through hole; the clamping block is provided with two groups of tension screw holes, the two groups of tension screw holes are respectively arranged on both sides of the rectangular groove, and tension screws are arranged in the tension screw holes to realize the connection of the two clamping blocks; the clamping block is fixed to the steel base by bolts.

2. The end clamp for RC column lateral impact test according to claim 1, characterized in that: The top surface of the steel base is provided with a T-shaped slot, in which a T-shaped bolt is arranged, and the T-shaped bolt passes through the bolt hole of the clamping block and is fixed to the clamping block through a nut.

3. The end clamp for RC column lateral impact test according to claim 2, characterized in that: A gasket is arranged between the nut and the clamping block.

4. The end clamp for RC column lateral impact test according to claim 2, characterized in that: The number of the tension screw holes in each group of tension screw holes is three; each clamp block is fixed to the steel base by four T-bolts.

5. The end clamp for RC column lateral impact test according to claim 1, characterized in that: The clamping block includes a steel frame; the steel frame includes a bottom plate, two vertical plates, two top plates and a U-shaped groove plate; the two vertical plates are parallel, and the vertical plates are perpendicular to the bottom plate and welded to the bottom plate; the bottom wall of the U-shaped groove plate is welded to the top of the two vertical plates, and the bottom wall of the U-shaped groove plate is parallel to the bottom plate; the two top plates are respectively welded to the top of the two side walls of the U-shaped groove plate; and the relative end faces of the two top plates are respectively flush with the inner walls of the two side walls of the U-shaped groove plate; reinforced concrete is poured in the groove between the top plate and the bottom plate and in the through hole between the two vertical plates.

6. The end clamp for RC column lateral impact test according to claim 5, characterized in that: Rib I and rib II are provided between the two vertical plates. The top surface of rib I is welded to the bottom wall of the U-shaped groove plate, and the two side surfaces of rib I are respectively welded to the two vertical plates; the bottom surface of rib II is welded to the bottom plate, and the two side surfaces of rib II are respectively welded to the two vertical plates; a triangular reinforcing rib I is welded between the top plate and the corresponding side wall of the U-shaped groove plate; a triangular reinforcing rib II is welded between the outer side of the vertical plate and the bottom plate.

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