CN211855653U - Device for testing horizontal restraining force of beam end - Google Patents

Abstract

The utility model provides a test device for the horizontal restraint force of a beam end, which comprises an upper end restraint member, a lower end restraint member and a support frame; the support frame supports the test member of the beam end to be measured, and the end of the test member is arranged on the Between the upper end restraining member and the lower end restraining member; the first connecting member passes through the first connecting plate, the experimental member and the reserved holes on the second connecting member in turn to realize the clamping of the experimental member by the upper end restraining member and the lower end restraining member; It also includes an upper force sensor, a lower force sensor and a reaction force frame; the upper force sensor and the lower force sensor are all connected with a data processing module. The application of the technical solution can accurately test the change trend of the horizontal restraint force of the beam end of the test member during the test process, and then obtain the change process of the internal force of the section of the test beam when it is deformed, thereby contributing to the research of related theories.

Description

Test device for horizontal restraint force of beam end

technical field

The utility model relates to the technical field of civil engineering test, in particular to a test device for the horizontal restraint force of beam ends.

Background technique

In the field of civil engineering, the beam is an important load-bearing component, and its basic mechanical properties determine the overall working performance of the building. The study of its mechanical properties is an important research direction in structural engineering. At present, it is necessary to carry out structural stress tests for beam members in engineering construction or theoretical research to determine the relevant material and structural performance parameters.

In actual working conditions, the boundary conditions of beams are various, and there are horizontal constraints and vertical constraints at the same time. Horizontal constraints have a non-negligible impact on the mechanical properties of beams. However, in the national standard "Standard for Test Methods of Concrete Structures" (GB/T50152-2012), only vertical restraint devices and methods are given, and there is a lack of devices and methods for testing the horizontal restraint force of beam ends in engineering test. inconvenience. In previous studies, most of the tests were limited to the actual conditions of the specimen or conditional limitations, and the magnitude of the horizontal restraint force at the beam end could not be directly measured, or the test beam end was converted by indirect testing of the axial strain and section axial stiffness. There is a certain uncertainty in the horizontal restraint force; only a few experiments use the end restraint device and the concrete specimen to be cast as one, but it is inconvenient to use, and it is easy to cause waste of the end device, and the use efficiency is low.

Utility model content

The purpose of the utility model is to provide a test device for the horizontal restraint force of the beam end, which can accurately test the change trend of the horizontal restraint force of the beam end of the test member during the test process, and then obtain the change process of the internal force of the section of the test beam when it is deformed. , thus contributing to the research of related theories.

In order to solve the above technical problems, the utility model provides a test device for the horizontal restraint force of a beam end, which includes an upper end restraint member, a lower end restraint member and a support frame; the support frame supports the test member of the beam end to be measured, and the test member The end of is arranged between the said upper end restraining member and the lower end restraining member;

The upper restraint member is provided with a first connection plate, the lower end restraint member is provided with a second connection plate, and the first connection plate, the second connection plate and the experimental member are all provided with reserved holes, through the first connection The parts pass through the first connecting plate, the experimental member and the reserved holes on the second connecting member in turn to realize the clamping of the experimental member by the upper-end restraining member and the lower-end restraining member;

It also includes an upper force sensor, a lower force sensor and a reaction force frame; the upper force sensor is connected between the upper end restraint member and the reaction force frame, and the lower force sensor is connected between the lower end restraint member and the reaction force frame. The upper force sensor and the lower force sensor are both connected with a data processing module.

In a preferred embodiment, a left connecting steel plate and a right connecting steel plate are arranged on the left and right sides of the upper end restraining member and the lower end restraining member; the right connecting steel plate is fixedly connected with an upper force sensor and a lower force sensor; The second connecting piece passes through the reserved holes on the left connecting steel plate and the right connecting steel plate to realize the clamping and fixing of the upper end restraining member and the lower end restraining member by the left connecting steel plate and the right connecting steel plate.

In a preferred embodiment, the ends of the upper force sensor and the lower force sensor away from the right connecting steel plate are also fixedly connected with a reaction force frame connecting steel plate; The reserved holes on the force frame realize the fixed connection between the upper force sensor and the lower force sensor and the reaction force frame.

In a preferred embodiment, the support frame includes a horizontally arranged frame beam and a frame column vertically arranged on both sides of the frame beam; the experimental member is arranged on the frame beam.

In a preferred embodiment, a double-layer steel backing plate is further arranged between the frame beam and the experimental member, and a steel roller is also arranged between the double-layered steel backing plate.

In a preferred embodiment, the reserved holes are all bolt holes.

Compared with the prior art, the technical solution of the present utility model has the following beneficial effects:

The utility model provides a test device for beam end horizontal restraint force and a test method for beam end horizontal restraint force. The device has wide applicability and can be applied to test beams with rectangular cross-section and T-shaped cross-section. The device is economical, and compared with the end restraint device and the concrete test piece being poured into one piece, the device has a lower cost and can be reused.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the testing device of beam end horizontal restraint force in the preferred embodiment of the present utility model;

2 is a schematic front view of the overall structure of the testing device for the horizontal restraint force of the beam end in the preferred embodiment of the present utility model;

3 is a schematic front view of the positional relationship between the upper end restraint member, the experimental member and the lower end restraint member of the test device for the horizontal restraint force of the beam end in the preferred embodiment of the present utility model;

4 is a schematic structural diagram of the upper end restraining member of the testing device for the horizontal restraint force of the beam end in the preferred embodiment of the present invention.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

A test device for the horizontal restraint force of the beam end, with reference to Figures 1 to 4, includes an upper end restraint member 2, a lower end restraint member 3 and a support frame; the support frame supports the test member 1 of the beam end to be measured, and the experimental member 1 is The end is arranged between the upper end restraint member 2 and the lower end restraint member 3; the upper end restraint member 2 is provided with a first connection plate 17, and the lower end restraint member 3 is provided with a second connection plate, the first connection plate 17. The second connecting plate and the experimental member 1 are provided with reserved holes, and the first connecting member 11 passes through the reserved holes on the first connecting plate 17, the experimental member 1 and the second connecting member 12 in turn to realize the above. The upper end restraint member 2 and the lower end restraint member 3 clamp the experimental member 1; it also includes an upper force sensor 4, a lower force sensor 5 and a reaction force frame 6; the upper force sensor 4 is connected to the upper end restraint member 2 and the reaction force frame 6; Between the force frames 6 , the lower force sensor 5 is connected between the lower end restraining member 3 and the reaction force frame 6 ; the upper force sensor 4 and the lower force sensor 5 are both connected with a data processing module. A left connecting steel plate 13 and a right connecting steel plate 14 are provided on the left and right sides of the upper end restraining member 2 and the lower end restraining member 3; the right connecting steel plate 14 is fixedly connected with the upper force sensor 4 and the lower force sensor 5; The connecting piece 12 passes through the reserved holes on the left connecting steel plate 13 and the right connecting steel plate 14 to realize the clamping and fixing of the upper end restraining member 2 and the lower end restraining member 3 by the left connecting steel plate 13 and the right connecting steel plate 14 .

The ends of the upper force sensor 4 and the lower force sensor 5 away from the right connecting steel plate 14 are also fixedly connected with a reaction force frame connecting steel plate 15; the third connecting piece 16 passes through the reaction force frame connecting steel plate 15 and the reaction force frame 6 in sequence. The reserved holes above realize the fixed connection of the upper force sensor 4 and the lower force sensor 5 and the reaction force frame 6 .

The support frame includes frame beams 7 arranged horizontally and frame columns 8 arranged vertically on both sides of the frame beam 7 ; the experimental member 1 is arranged on the frame beam 7 .

A double-layer steel backing plate 9 is also arranged between the frame beam 7 and the experimental member 1 , and a steel roller 10 is also arranged between the double-layered steel backing plate 9 . In this embodiment, the reserved holes are all bolt holes.

A method for testing the horizontal restraint force of the beam end adopts the above-mentioned test device of the horizontal restraint force of the beam end; comprises the following steps:

(1) Process the test member; according to the purpose of the test, process the steel structure beam or composite structure beam or concrete beam of T-shaped section, that is, the test member; during production, on the test member 1 and the upper restraint member and the lower part The reserved holes on the constraining member shall be set at the corresponding upper and lower positions, so as to pass through later installation; the stirrups at the end of the beam shall be partially encrypted during fabrication to ensure that the damage position of the experimental member 1 is not at the opening position, so that the Guaranteed measurement accuracy and stability.

(2) Process the supporting frame; the supporting frame is formed by connecting the frame beams 7 and the frame columns 8; according to the test requirements, install the supports in the form of supports recommended by the national standard "Test Methods for Concrete Structures" (GB/T50152-2012). . First, the steel roller 10 is welded to the lower steel backing plate of the double-layer steel backing plate 9, and then the whole is spot welded to the upper surface of the frame beam 7 of the supporting frame, and finally the double-layer steel backing plate 9 is welded. The upper steel backing plate is pre-placed on the upper part of the steel roller 10;

(3) Hoist the test member to the support frame;

(4) Install and debug the restraint system; the upper restraint member 2 and the lower restraint member 3 are welded by hot-rolled H-beam 2-1 and steel plate 2-2; the steel plate has four reserved holes, namely bolt holes; Installation process:

1) Level the end area of the test member with fine sand;

2) Place the upper end restraint member 2 on the surface of the experimental member 1, and align the reserved holes of the upper end restraint member 2 with the reserved holes on the experimental member 1; Extend the first connector 11, the extension bolt, into the reserved holes; The lower part of the extension bolt passes through the reserved hole of the lower end restraining member 3, and the bottom nut is tightened;

3) Place the left connecting steel plate 13 and the right connecting steel plate 14 with the reserved holes on both sides of the upper end restraining member 2 and the lower end restraining member 3 respectively, and set the reserved holes to them; the second connecting piece 12 That is, extend the bolt into the reserved hole and tighten the nut;

4) Align the reserved holes on the reaction force frame 6 with the reserved holes of the reaction force frame connecting steel plate 15, extend the third connector 16, namely the bolt, into the reserved hole and tighten the nut;

5) Install the upper force sensor 4 and the lower force sensor 5 between the reaction force frame 6 and the upper restraint member 2 and the lower restraint member 3;

6) Connect the data acquisition line of the force sensor to the data processing module, and carry out preliminary debugging;

7) The restraint system is installed;

(5) After the debugging is completed, by setting the upper force sensor 4 and the lower force sensor 5, the change process of the horizontal restraint force of the beam end during the test process is detected, so as to grasp the situation of the horizontal restraint force of the beam end;

(6) Analyze and process the test data and summarize the test phenomenon.

The utility model provides a test device for beam end horizontal restraint force and a test method for beam end horizontal restraint force. The device has wide applicability and can be applied to test beams with rectangular cross-section and T-shaped cross-section. The device is economical, and compared with the end restraint device and the concrete test piece being poured into one piece, the device has a lower cost and can be reused.

The above description is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited to this. Any insubstantial modification of the present invention is an act infringing the protection scope of the present invention.

Claims (6)

1. a test device of beam end horizontal restraint force is characterized in that comprising upper end restraint member, lower end restraint member and supporting frame; Described supporting frame supports the experimental member of beam end to be measured, and the end of described experimental member is arranged in the described experimental member. Between the upper end restraint member and the lower end restraint member; The upper restraint member is provided with a first connection plate, the lower end restraint member is provided with a second connection plate, and the first connection plate, the second connection plate and the experimental member are all provided with reserved holes, through the first connection The parts pass through the first connecting plate, the experimental member and the reserved holes on the second connecting member in turn to realize the clamping of the experimental member by the upper-end restraining member and the lower-end restraining member; It also includes an upper force sensor, a lower force sensor and a reaction force frame; the upper force sensor is connected between the upper end restraint member and the reaction force frame, and the lower force sensor is connected between the lower end restraint member and the reaction force frame. The upper force sensor and the lower force sensor are both connected with a data processing module. 2. The testing device for beam end horizontal restraint force according to claim 1, wherein the left and right connecting steel plates of the upper end restraining member and the lower end restraining member are provided with a left connecting steel plate and a right connecting steel plate; the right connecting The steel plate is fixedly connected with an upper force sensor and a lower force sensor; the second connecting piece passes through the reserved holes on the left connecting steel plate and the right connecting steel plate to realize the connection between the left connecting steel plate and the right connecting steel plate to the upper end restraining member and the lower end restraining member. Clamped and fixed. 3. The testing device for beam end horizontal restraint force according to claim 2, wherein the end of the upper force sensor and the lower force sensor far from the right connecting steel plate is also fixedly connected with a reaction force frame connecting steel plate; the third connection The parts pass through the connecting steel plate of the reaction force frame and the reserved holes on the reaction force frame in turn to realize the fixed connection between the upper force sensor and the lower force sensor and the reaction force frame. 4. The test device for beam end horizontal restraint force according to claim 3, wherein the support frame comprises a horizontally arranged frame beam and a frame column vertically arranged on both sides of the frame beam; the experiment Components are arranged on the frame beams. 5. the test device of beam end horizontal restraint force according to claim 4, is characterized in that, between described frame beam and experimental member, also set double-layer steel backing plate, also set between described double-layer steel backing plate Has steel rollers. 6 . The testing device for beam end horizontal restraint force according to claim 1 , wherein the reserved holes are all bolt holes. 7 .

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