CN210953301U - A protective bracket suitable for shaking table test - Google Patents

Abstract

The utility model relates to a protective bracket suitable for a vibrating table test, which is used for protecting a vibrating table (5) arranged in a channel and comprises 2 longitudinal beams (1), 2 cross beams and at least 2 cantilever arms (4), wherein the cross beams comprise 2 main cross beams (2) and 2 auxiliary cross beams (3), the 2 longitudinal beams (1) are symmetrically arranged on the ground at the two sides of the channel along the cross-groove direction and are positioned at the two sides of the vibrating table (5), the 2 main cross beams (2) are arranged at the two sides of the vibrating table (5) along the cross-groove direction, the two ends of each main cross beam (2) are fixedly connected with the 2 longitudinal beams (1), the 2 auxiliary cross beams (3) are respectively and fixedly connected with one side of the 2 main cross beams (2) facing the channel side by side, the 2 cantilever arms (4) are respectively and fixedly connected with one side of the 2 longitudinal beams (1) facing the vibrating table (5) side by side, the protective bracket is provided with a cover plate. Compared with the prior art, the utility model has the advantages of the security is high, the flexibility is good.

Description

A protective bracket suitable for shaking table test

technical field

The utility model relates to the field of civil engineering, in particular to a protection bracket suitable for a vibration table test.

Background technique

The shaking table test can obtain the dynamic response of the component under the earthquake action by inputting the ground motion to the test component through the shaking table table, which is an effective method to obtain the dynamic response of the structure under the earthquake action. The multi-point shaking table seismic simulation system is composed of a channel and multiple shaking tables in the channel. When multiple shaking tables are located in a channel, multiple shaking tables form a large linear shaking table group. Multiple shaking tables can also be used. Distributed in two channels that are not on the same straight line, the shaking tables in the two channels together form a polygonal shaking table group, and the polygon shaking table group is used as a large shaking table. The multi-point shaking table earthquake simulation system can be applied to bridge engineering, building and space structure, underground engineering, lifeline engineering and disaster prevention and mitigation engineering, etc., providing a vibration and earthquake simulation experiment platform for a wide range of civil engineering disciplines.

Since the vibration displacement of the vibration table design is large and the actuator is directly supported on the side wall of the channel, the vibration table is far from the edge of the channel, and the following two problems exist in the vibration test:

First, it is not conducive to erecting a simple supporting scaffold structure for sensor installation. If the sensor bracket is installed on the table, due to the vibration of the bottom, the top of the bracket is prone to large natural vibration, which affects the measurement results;

Second, due to the large gap between the shaking table and the channel, debris can easily fall into the gap and affect the test, and even lead to safety accidents and damage to the shaking table.

Utility model content

The purpose of this utility model is to provide a protective support suitable for shaking table test in order to overcome the defects of the above-mentioned prior art, improve the test ability and measurement level of the multi-point shaking table group, improve the test safety and laboratory performance. Service level, with the advantages of good security and high flexibility.

The purpose of the present utility model can be achieved through the following technical solutions:

A protective bracket suitable for a shaking table test, used to protect a shaking table placed in a channel, includes 2 longitudinal beams, 2 transverse beams and at least 2 pick arms, and the transverse beam includes 2 main beams and 2 Auxiliary beams, the two longitudinal beams are placed symmetrically on the ground on both sides of the channel along the groove direction and are located on both sides of the vibration table, and the two main beams are arranged along the groove direction on both sides of the vibration table And the two ends of each main beam are fixedly connected with 2 longitudinal beams, the 2 auxiliary beams are respectively connected side by side with the side of the 2 main beams facing the channel, and the 2 pick arms are respectively connected with the 2 The side of the longitudinal beams facing the vibrating table is fixedly connected side by side, and the protective bracket is provided with a cover plate for covering the gap between the trusses of the protective bracket.

Further, the rectangular area enclosed by the described sub-beam and the pick arm is located just above the vibrating table surface, and when the vibrating table is at rest and the maximum amplitude, the vertical projection surface of this rectangular area on the vibrating table table is included in the vibration table. inside the countertop.

Further, when the number of the pick arms exceeds 2, the remaining pick arms are symmetrically arranged side by side on the side of the 2 pick arms connected with the 2 stringers facing the vibration table except for the 2 pick arms connected with the 2 longitudinal beams. .

Further, the two ends of the upper chord of the main beam are provided with seamless steel pipes, the connection position of the longitudinal beam and one end of the main beam is provided with seamless steel pipes, and the two ends of the upper chord of the main beam are provided with seamless steel pipes. The mating connection of seam steel pipes and bolts is fixedly connected to the longitudinal beam.

Further, both ends of the lower chord of the main beam are fixedly connected to the two longitudinal beams through a triangular plate.

Further, the upper chords of the main beam and the auxiliary beam arranged side by side are provided with seamless steel pipes in the same position, and the upper chord of the auxiliary beam is fixedly connected to the main beam through the matching connection of the seamless steel pipe and the bolt.

Further, the longitudinal beams are provided with supports, and both ends of the lower chords of the auxiliary beams are placed on the supports of the two longitudinal beams.

Further, the two ends of the upper chord of the pick-up arm and the upper chord of the longitudinal beam are provided with corresponding seamless steel pipes, and the upper chord of the pick-up arm is fixedly connected to the longitudinal beam through the fitting connection of the seamless steel pipe and the bolt.

Further, an equilateral angle steel is welded on the lower chord of the pick arm and the longitudinal beam, and the equilateral angle steel on the lower chord of the pick arm is placed on the equilateral angle steel on the lower chord of the longitudinal beam.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The utility model utilizes 2 longitudinal beams, 4 transverse beams and 2 pick arms to be assembled into a protective bracket that is fixed on the adjacent ground of the channel around the vibrating table, and the 4 transverse beams include 2 main transverse beams and at least 2 At the same time, a cover plate covering the truss gap of the protective bracket is provided on the top of the protective bracket, so the protective bracket can block the gap between the vibrating table and the channel, and the sundries will fall into the channel and cause safety accidents and accidents. The vibration table is damaged, and it is convenient to install test equipment at various positions of the protective bracket to avoid the impact of the shake table test on the test equipment, and to obtain the vibration test data of the specimen clearly and accurately at close range;

(2) The utility model connects two auxiliary beams with the main beam and the longitudinal beam through the seamless steel pipe and the support, and at least two pick arms are connected with the longitudinal beam through the seamless steel pipe and the equilateral angle steel. The size of the specimen placed on the table and the vibration amplitude of the vibrating table can choose whether to install the sub-beam and the pick arm. At the same time, the number of pick arms can be set flexibly, and the protective bracket can flexibly adjust the size of the covered area to ensure that the protective bracket covers the vibration to the greatest extent. It is suitable for test pieces of different sizes and different test requirements, and has good flexibility;

(3) The utility model fixes the main beam and the longitudinal beam through the seamless steel pipe and the triangular plate, and the main beam has different lengths and dimensions, which can be suitable for both single shaking table test and multi-point shaking table group vibration test. good flexibility;

(4) The utility model is provided with a cover plate used to cover the rectangular area on the top of the protective bracket. When the test is not carried out, a support is temporarily placed on the beam to support the cover plate. The construction personnel can easily walk on the cover plate. The board can also place small equipment, tools and sundries, which is conducive to the installation of test equipment and the enclosure and adjustment of test pieces;

(5) The protection bracket of the utility model is a steel truss structure, the structure is a stable self-balancing structure, and can be directly placed on the ground. The longitudinal beam and the ground do not need to be fixedly connected by bolts, and no additional weight is required, and the safety is good. , easy and flexible disassembly.

Description of drawings

Figure 1 is a schematic diagram of a fully assembled single vibrating table protective bracket;

Figure 2 is a schematic diagram of a partially assembled single vibrating table protective bracket;

Figure 3 is a schematic diagram of a fully assembled double-stage vibrating table protective bracket;

Figure 4 is a schematic diagram of a partially assembled double-stage vibrating table protective bracket;

5 is a partial structural diagram of a protective bracket;

Figure 6 is a front view of the equilateral angle steel connection;

Figure 7 is a side view of the equilateral angle steel connection.

Description of the labels in the figure:

1. Longitudinal beam, 2. Main beam, 3. Secondary beam, 4. Pick arm, 5. Vibrating table, 6. Equilateral angle steel, 7. High-strength bolt, 8. Triangle plate, 9. Support.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

A protection bracket suitable for shaking table test, adopts steel truss structure, used to protect shaking table 5 placed in the channel, including 2 longitudinal beams 1, 4 transverse beams and at least 2 cantilever arms 4, 4 transverse beams Including 2 main beams 2 and 2 auxiliary beams 3, 2 longitudinal beams 1 are symmetrically placed on the ground on both sides of the channel along the cross-groove direction and located on both sides of the vibrating table 5, and the 2 main beams 2 are along the groove direction. It is arranged on both sides of the vibrating table 5 and the two ends of each main beam 2 are fixedly connected with the two longitudinal beams 1, and the two auxiliary beams 3 are respectively arranged side by side on the side of the two main beams 2 facing the channel and are connected with the corresponding The main beam 2 is fixedly connected, and the two pick arms 4 are respectively arranged side by side on the side of the two longitudinal beams 1 facing the vibration table 5 and are fixedly connected with the corresponding longitudinal beam 1. The longitudinal beam 1 is the main force-bearing member, and the horizontal beam and the pick arm are arranged side by side. 4. Transfer all the received loads to the longitudinal beam 1.

The protection bracket is provided with a cover plate for covering the gap between the trusses of the protection bracket, and the outer cover plate can bear a uniform live load of 5kN/m2 except for its own weight. When the vibration test is not carried out, a support beam can be temporarily set up on the vibration table 5, and the test personnel can walk on the cover plate and perform the test operation. At the same time, test equipment, props and sundries can be placed on the cover plate; The support is removed during the test, and the protective bracket can block the groove gap to prevent the debris falling from the test piece from damaging the oil cylinder of the vibration table 5. At the same time, test equipment can be installed at various positions of the protective bracket to avoid vibration test on the test equipment. The vibration test data of the specimen can be observed clearly and accurately.

The table size of the shaking table is 6m×4m, the width of the channel is 9m, the distance between the two sides of the shaking table 5 is 1.5 m from the edge of the channel, the ground is higher than the table top of the shaking table 5, the main beam 2 has two sizes, the length, width and height are respectively. It is 5m×1.44m×0.6m and 11m×1.44m×0.6m. The auxiliary beam 3 has two sizes. The length, width and height are 5m×1.0m×0.4m and 11m×1.0m×0.4m respectively. The main beam 2 It is used together with the auxiliary beam 3.

Figure 1 is a schematic diagram of a fully assembled single vibrating table 5 protective bracket. The single vibrating table 5 protective bracket includes 2 longitudinal beams 1, 4 cross beams and 2 pick arms 4. The length and width of the longitudinal beam 1 are 11m × 1.0 m, the length, width and height of the main beam 2 are 5m×1.44m×0.6m, the length, width and height of the auxiliary beam 3 are 5m×1.0m×0.4m, and the length, width and height of the pick arm 4 are 5m×1.0m.

The rectangular area enclosed by the two auxiliary beams 3 and the two pick arms 4 is located directly above the table surface of the shaking table 5. When the shaking table 5 is at rest and has a maximum amplitude, the rectangular area is included in the table area of the shaking table.

3 is a schematic diagram of the fully assembled double-stage vibration table 5 protection bracket, the dual-stage vibration table 5 protection bracket includes 2 longitudinal beams 1, 4 transverse beams and 4 pick arms 4, except for the 2 longitudinal beams 1 connected with In addition to the pick arms 4, the other two pick arms 4 are symmetrically arranged side by side on the side of the two pick arms connected with the two longitudinal beams facing the vibration table, and the pick arms 4 are connected by seamless steel pipes.

As shown in Figure 5, the two ends of the upper chord of the main beam 2 are provided with seamless steel pipes, the connection position between the longitudinal beam 1 and one end of the main beam 2 is provided with seamless steel pipes, and the upper end of the main beam 2 is provided with seamless steel pipes and M22 high-strength bolts 7 The mating connection is fixedly connected with the longitudinal beam 1;

Both ends of the lower chord of the main beam 2 are fixedly connected with the two longitudinal beams 1 through the triangular plate 8;

The upper chords of the main beam 2 and the auxiliary beam 3 arranged side by side are provided with the same seamless steel pipe, and the upper chord of the auxiliary beam 3 is fixedly connected with the main beam 2 by the matching connection of the seamless steel pipe and the M22 high-strength bolts 7;

The longitudinal beam 1 is provided with a support 9, and both ends of the lower chord of the auxiliary beam 3 are placed on the supports 9 of the two longitudinal beams 1;

The two ends of the upper chord of the pick arm 4 and the upper chord of the longitudinal beam 1 are provided with corresponding seamless steel pipes.

As shown in Figures 6 and 7, the equilateral angle steel is welded on the lower chord of the pick arm 4 and the longitudinal beam 1, and the equilateral angle steel on the lower chord of the pick arm 4 is placed on the equilateral angle steel on the lower chord of the longitudinal beam 1.

Install the specimen on the table top of the shaking table 5, and place two longitudinal beams on the ground on both sides of the channel; When the number of vibration tables 5 is 1, the structure diagram is shown in Figure 2, and when the number of vibration tables 5 is 2, the structure diagram is shown in Figure 4; The vibration amplitude selects whether to install the sub-beam 3 and the pick arm 4; when the specimen on the shaking table 5 is located in the center area of the shaking table 5 and does not extend to the edge of the table, install the auxiliary beam 3 and the pick arm 4, and the number of the shaking table 5 is The structure diagram is shown in Figure 1 when there is one vibration table, and the structure diagram is shown in Figure 3 when the number of vibration tables 5 is two. When the vibration table vibrates with a maximum amplitude of 0.5m, the protective bracket can cover the entire range of the vibration table 5; When the number of beams 3, pick arms 4, and vibrating table 5 is one, the structure diagram is shown in Figure 2, and when the number of vibrating tables 5 is two, the structure diagram is Figure 4. When the vibration table 5 vibrates with the maximum amplitude of 0.5m, it can ensure that collided with the protective bracket.

The embodiment proposes a protective bracket suitable for a shaking table test, which further improves the test capability and measurement level of the multi-point shaking table group, improves the test safety and the service level of the laboratory, and the protective bracket can be fixed around the shaking table. On the ground adjacent to the channel, when the shaking table test is not carried out, a support beam can be temporarily set up on the shaking table 5. The test personnel can walk on the cover plate to walk and conduct experiments, and at the same time, some test equipment, etc. can be placed on the cover plate. Props and sundries; when the vibration test is performed on the shaking table 5, the protective bracket can block the groove gap to prevent the debris falling from the specimen from smashing the oil cylinder of the shaking table 5. At the same time, the protective bracket can be adjusted according to the size of the specimen. And the vibration amplitude of the vibrating table 5 adjusts the size of its covering area, which has good safety and high flexibility.

The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, any technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims. .

Claims (9)

1. The utility model provides a protective cradle suitable for shaking table is experimental for the protection is arranged in shaking table (5) in the channel in, its characterized in that, includes 2 longerons (1), 2 crossbeams and at least 2 and is chosen arm (4), the crossbeam include 2 main beam (2) and 2 auxiliary beam (3), 2 longerons (1) along striding groove direction symmetry place subaerial and the both sides that are located shaking table (5) in the channel both sides, 2 main beam (2) along following the groove direction set up in the both sides of shaking table (5) and the both ends of every main beam (2) and 2 longerons (1) fixed connection, 2 auxiliary beam (3) respectively with 2 main beam (2) towards one side fixed connection side of channel side by side, 2 choose arm (4) respectively with 2 longerons (1) towards one side fixed connection side by side of shaking table (5), and the protective bracket is provided with a cover plate for sealing gaps among the trusses of the protective bracket.

2. The protective bracket suitable for the shaking table test according to claim 1, characterized in that the rectangular area enclosed by the secondary beam (3) and the cantilever arm (4) is located right above the table top of the shaking table (5), and the vertical projection planes of the rectangular area on the table top of the shaking table (5) are contained in the table top of the shaking table (5) when the shaking table (5) is at rest and at the maximum amplitude.

3. The protective bracket suitable for the shaking table test is characterized in that when the number of the cantilever arms (4) exceeds 2, the rest cantilever arms (4) except the 2 cantilever arms (4) connected with the 2 longitudinal beams (1) are symmetrically arranged side by side on the side, facing the shaking table (5), of the 2 cantilever arms (4) connected with the 2 longitudinal beams (1).

4. The protective bracket applicable to the vibration table test is characterized in that seamless steel pipes are arranged at two ends of an upper chord of the main cross beam (2), seamless steel pipes are arranged at connecting positions of the longitudinal beam (1) corresponding to one end of the main cross beam (2), and two ends of the upper chord of the main cross beam (2) are fixedly connected with the longitudinal beam (1) through matching connection of the seamless steel pipes and bolts.

5. The protective bracket suitable for the test of the vibrating table as claimed in claim 1, wherein two ends of the lower chord of the main cross beam (2) are fixedly connected with the 2 longitudinal beams (1) through a triangular plate (8).

6. The protective bracket suitable for the vibration table test is characterized in that seamless steel pipes in the same position are arranged on the upper chords of the main cross beam (2) and the auxiliary cross beam (3) which are arranged side by side, and the upper chords of the auxiliary cross beam (3) are fixedly connected with the main cross beam (2) through the matching connection of the seamless steel pipes and bolts.

7. The protective bracket for the shaking table test is characterized in that the longitudinal beam (1) is provided with a support (9), and the two ends of the lower chord of the secondary cross beam (3) are placed on the supports (9) of the 2 longitudinal beams (1).

8. The protective bracket suitable for the vibration table test is characterized in that two ends of the upper chord of the cantilever arm (4) and the upper chord of the longitudinal beam (1) are provided with corresponding seamless steel tubes, and the upper chord of the cantilever arm (4) is fixedly connected with the longitudinal beam (1) through the matching connection of the seamless steel tubes and bolts.

9. The protective bracket suitable for the shaking table test is characterized in that equal-angle steel is welded on the lower chords of the cantilever arm (4) and the longitudinal beam (1), and the equal-angle steel on the lower chords of the cantilever arm (4) is placed on the equal-angle steel on the lower chords of the longitudinal beam (1).

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