CN110567666A - Assemblable large-scale shaking table test protection device - Google Patents

Abstract

The assembleable large-scale shaking table test protection device of the present invention includes an anchoring structure and a shaking table protection frame erected on the anchoring structure; the anchoring structure includes a concrete anchor block and a column anchored on the concrete anchor block; the shaking table protection frame includes The steel frame is fixedly erected on the column, and the steel frame includes a Bailey truss main beam erected on the column and a Bailey truss sub-beam fixed on the main beam. The Bailey truss sub-beam includes a transverse Bailey truss beam and a longitudinal beam. The Lei truss beam, the transverse Bailey truss beam and the longitudinal Bailey truss beam are erected on the main beam of the Bailey truss to form a well-shaped structure for the placement of the shaking table. The beneficial effects of the present invention are: the new invention forms a space-enclosed frame on the neck of the test model, when the test structure collapses, the safety protection device can jam the test piece in time; the characteristics of simple assembly and hoisting; because the safety protection device shuttles through the space It can provide a layout platform for the test sensor, which is convenient for the test personnel to operate and observe the test phenomenon.

Description

Assemblable large-scale shaking table test protection device

technical field

The present invention relates to the technical field of vibration test safety protection, in particular to an assembled large-scale vibration table test protection device.

Background technique

Large-scale shaking table test is an important test technique in earthquake engineering research. In order to ensure the safety of personnel and equipment during the test, it is often necessary to design safety protection devices when conducting elastoplastic seismic response failure simulation tests of large-scale or full-scale structural models. The safety protection device should fully consider various possible unfavorable conditions (structure collapse, falling counterweight), so that the designed protective structure can reliably resist these unfavorable conditions. Therefore, how to design a safe and reliable device with sufficient strength and stability to resist the impact force when the test structure collapses, and at the same time, have enough rigidity to ensure that the device will not deform too much under construction and normal use, and Safety protection devices that are easy to install and disassemble have become a technical problem that needs to be solved in the design of safety protection devices for large-scale shaking table tests. At present, there is a lack of research on the design of large-scale shaker protection devices. Therefore, how to provide a large-scale vibration table test safety protection device with high rigidity, strong stability, and easy transportation and assembly is still an urgent problem to be solved.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide an assembled large-scale vibration table test protection device to solve the problem of lack of safety protection for large-scale vibration test tables in the prior art.

The assembled large-scale shaking table test protection device of the present invention comprises an anchoring structure and a shaking table protection frame erected on the anchoring structure;

Anchoring structure, including concrete anchor blocks and uprights anchored on the concrete anchor blocks;

The protection frame of the vibrating table includes the main beam of the Bailey truss erected on the upright column and the sub-beam of the Bailey truss fixed on the main beam, and the sub-beam of the Bailey truss includes transverse Lei truss girder and longitudinal Bailey truss girder, transverse Bailey truss girder and longitudinal Bailey truss girder are erected on the main beam of Bailey truss to form a well-shaped structure for the placement of the shaking table.

Further, adjacent main beams are connected and reinforced by reinforced beams of Bailey truss main beams.

Further, the adjacent transverse Bailey truss beams are connected and reinforced by transverse reinforcement beams.

Further, the adjacent longitudinal Bailey truss beams are connected and reinforced by longitudinally reinforced beams.

Further, the anchoring structure includes four uprights located on the four corners of the quadrilateral and concrete anchor blocks respectively arranged on the four uprights, and the main beam of the Bailey truss is erected between the two uprights.

Further, the length of the main beam of the Bailey truss is 18m.

Further, the weight of the concrete anchor block is 25t.

Further, the concrete anchor block is provided with anchor holes for the column to be anchored by high-strength bolts, and the diameter of the anchor holes is 50mm.

Further, the column is a steel body, and the column height is 2m.

The beneficial effects of the invention are: the new invention forms a space closed frame on the neck of the test model, when the test structure collapses, the safety protection device can jam the test piece in time; Steel wire, and can also withstand the impact force caused by the accidental fall of the counterweight; the Bailey truss of the entire safety device is erected horizontally, which conforms to the force characteristics of the Bailey beam, and the overall stability is good through the effect of stiffening the beam; at the same time, The Bailey sheet itself is easy to assemble and hoist, which solves the problems of convenient installation, unloading and transportation. Due to the large shuttle space of the safety protection device, it can provide a layout platform for the test sensor, which is convenient for the test personnel to operate and observe the test phenomenon.

Description of drawings

The accompanying drawings that constitute a part of the present invention are used to assist the understanding of the present invention, and the content provided in the accompanying drawings and their related descriptions in the present invention can be used to explain the present invention, but do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 is a schematic structural diagram of an assembled large-scale vibration table test protection device of the present invention.

FIG. 2 is a schematic diagram of the installation structure of the threaded steel pipe and the steel gasket in the assembled large-scale shaking table test protection device of the present invention.

The relevant marks in the above drawings are:

1: concrete anchor block;

2: column;

3: Bailey truss main beam;

4: Transverse Bailey truss beam;

5: Longitudinal Bailey truss beam;

6: Main beam reinforced beam;

7: Lateral reinforced beam;

8: Longitudinal reinforced beam;

9: Shaker.

Detailed ways

The present invention will be clearly and completely described below with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before the present invention is described in conjunction with the accompanying drawings, it should be particularly pointed out that:

The technical solutions and technical features provided in each part including the following description in the present invention can be combined with each other under the condition of no conflict.

In addition, the embodiments of the present invention referred to in the following description are generally only some embodiments of the present invention, but not all of the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Regarding the terms and units in the present invention. The terms "comprising", "having" and any variations thereof in the description and claims of the present invention and related parts are intended to cover non-exclusive inclusion.

The assembled large-scale shaking table test protection device of the present invention is characterized in that it comprises an anchoring structure and a shaking table protection frame erected on the anchoring structure;

Anchoring structure, including concrete anchor block 1 and upright column 2 anchored on the concrete anchor block 1;

The vibrating table protection frame includes a Bailey truss main beam 3 that is fixedly erected on the upright column 2 and a Bailey truss sub-beam that is fixedly erected on the main beam. The Bailey truss sub-beam Including the transverse Bailey truss beam 4 and the longitudinal Bailey truss beam 5, the transverse Bailey truss beam 4 and the longitudinal Bailey truss beam 5 are erected on the Bailey truss main beam 3 to form a well-shaped structure for the vibrating table to be placed.

Adjacent Bailey truss main beams 3 are connected and strengthened by main beam reinforced beams 6 .

The adjacent transverse Bailey truss beams 4 are connected and reinforced by transverse reinforcement beams 7 .

Adjacent longitudinal Bailey truss beams 5 are connected and reinforced by longitudinal reinforced beams 8 .

The anchoring structure comprises four uprights 2 positioned on the four corners of the quadrilateral and concrete anchor blocks 1 respectively arranged on the four uprights 2, and the Bailey truss main beam 3 is set up between the two uprights 2.

The length of the Bailey truss main beam 3 is 18m.

The weight of the concrete anchor block 1 is 25t.

The concrete anchor block 1 is provided with anchor holes for anchoring the columns 2 through high-strength bolts, and the diameter of the anchor holes is 50 mm.

The column 2 is a steel body, and the height of the column 2 is 2m.

The operation steps of the present invention are as follows:

As shown in Figure 1 and Figure 2, in one step, four large gravity concrete anchor blocks 1 are placed on both sides of the vibrating table as the foundation of the entire safety protection device. The mass of each concrete anchor block 1 is 25t. There are anchor holes with a diameter of 50mm;

In the second step, four steel columns 2 with a height of 2m are placed on the concrete anchor block 1 according to the pre-designed position, and anchored with high-strength screws as the pier of the protective support;

In three steps, the main beam 4 of the Bailey truss with a span of 18m is connected to the tower on the ground;

In the fourth step, set up the two main beams 4 of the Bailey truss on the top surface of the steel column 2, keep a certain safety distance from the table top of the vibration table 9 and the bridge pier, and install two main beams between the two main beams of the Bailey truss 4 at the same time. Rib beam 6;

The fifth step is the hoisting of the test model on the shaking table and the assembly of the transverse Bailey truss beam 4 and the longitudinal Bailey truss beam 5 on the ground;

In the sixth step, the transverse Bailey truss beam 4 and the longitudinal Bailey truss beam 5 are erected on the main beam of the Bailey truss to form a well-shaped structure;

Seven steps, finally install the transverse reinforced beam 7 between the top transverse Bailey truss beam 4 and the longitudinal reinforced beam 8 between the longitudinal Bailey truss beam 5, thereby forming an overall safety protection structure, all reinforced beams 6 All are reinforced on the corresponding thunder truss beams by threaded steel pipes 10 and steel gaskets 11;

The eighth step is to install the auxiliary structure, and establish the sensor arrangement and test observation platform through the steel pipe scaffold.

Through the above eight steps, the safety protection measures for the large-scale shaking table test can be achieved, and the sensor arrangement platform is constructed. The implementation of the replacement of the test model after the test is completed is as follows:

In the ninth step, the whole well-shaped structure is lifted and moved, and the test model is exchanged;

In ten steps, the tic-tac-toe structure is assembled as a whole.

After the above ten steps, the first test model was lifted from scratch, the safety protection structure was assembled, the test was completed, the well-shaped structure was lifted, the first test model was lifted, the second test model was lifted, and the well The glyph structure is assembled, and the subsequent tests such as the completion of the test are cycled in turn.

In order to ensure that the protective device has sufficient safety protection capability, the buckling analysis results of the worst case under the expected impact load are shown in Table 1:

Table 1

modal Stability factor Modal description 1 6.9 first-order lateral bending 2 7.5 first-order lateral bending 3 11.7 Second-Order Lateral Bending 4 28.0 third-order lateral bending 5 33.3 Fourth-Order Lateral Bending

The stability coefficient of the first-order buckling mode is 6.9>2.5, which meets the requirements of "Code for Design of Highway Steel Structure Bridges" (JTG/D64-2015), and no lateral buckling failure occurs.

Claims (9)

1. Assemblable large-scale shaking table test protection device is characterized in that, comprising anchoring structure, the shaking table protection frame erected on the anchoring structure; Anchoring structure, including concrete anchor blocks (1) and uprights (2) anchored on the concrete anchor blocks (1); The vibrating table protection frame includes a main beam (3) of a Bailey truss that is erected on the upright column (2), and a sub-beam of the Bailey truss that is erected on the main beam. The Bailey truss sub-girders include the transverse Bailey truss beam (4) and the longitudinal Bailey truss beam (5), the transverse Bailey truss beam (4) and the longitudinal Bailey truss beam (5) in the Bailey truss main beam (3) ) is erected with a well-shaped structure for the vibrating table to be placed. 2 . The assembleable large-scale shaking table test protection device according to claim 1 , wherein the main beams ( 3 ) of adjacent Bailey trusses are connected and reinforced by the main beam reinforced beams ( 5 ). 3 . 3 . The assembleable large-scale shaking table test protection device according to claim 1 , wherein the adjacent transverse Bailey truss beams ( 4 ) are connected and reinforced by transverse reinforced beams ( 6 ). 4 . 4 . The assembleable large-scale shaking table test protection device according to claim 1 , wherein the adjacent longitudinal Bailey truss beams ( 5 ) are connected and strengthened by longitudinal reinforced beams ( 7 ). 5 . 5. The assembleable large-scale shaking table test protection device according to claim 1, wherein the anchoring structure comprises four uprights (2) located on the four corners of the quadrilateral and are respectively arranged on the four uprights (2) The concrete anchor block (1), the main beam (3) of the Bailey truss is erected between two uprights (2). 6 . The assembled large-scale shaking table test protection device according to claim 1 , wherein the length of the main beam ( 3 ) of the Bailey truss is 18 m. 7 . 7 . The assembleable large-scale vibration table test protection device according to claim 1 , wherein the weight of the concrete anchor block ( 1 ) is 25t. 8 . 8. The assembleable large-scale shaking table test protection device according to claim 1, wherein the concrete anchor block (1) is provided with an anchor hole for the column (2) to be anchored by high-strength bolts, and the anchor The hole diameter is 50mm. 9 . The assembleable large-scale vibration table test protection device according to claim 1 , wherein the column ( 2 ) is a steel body, and the height of the column ( 2 ) is 2 m. 10 .