CN203798665U - Side-direction instability prevention device for steel-frame structure test - Google Patents

Abstract

The invention relates to an anti-lateral instability device for a steel frame structure test, which belongs to the field of steel structure research. Fix the beam-column test model (4) on the supporting bottom beam (10), the support platform (1) is fixed on the supporting bottom beams (10) on both sides of the column structure of the test beam-column model (4), and the column structure slides The supports are distributed on the column structure of the test beam-column model (4) according to requirements; the beam structure sliding support is fixed on the beam of the test beam-column model (4). The utility model can arrange the positions for installing the sliding bearings according to the needs, all of which are assembled structures.

Description

Anti-lateral instability device for steel frame structure test

technical field

The utility model relates to steel structure frame test equipment, which belongs to the field of steel structure research in civil engineering specialty.

Background technique

With the continuous advancement of science and technology, the rapid development of the national economy, and the continuous increase in national steel production, the status of steel structures in the construction industry has gradually improved. Coupled with the characteristics of light weight and high strength of steel structures, the development of steel structures in the construction industry will only increase. No reduction. The natural disasters caused by major earthquakes have also led scholars from various countries to focus on the study of steel frame ductile joints, and various ductile joints of steel frame structures with different connection forms have emerged. The research at this stage is based on the relevant experimental research of joints, but whether this kind of ductile joints have the same ductility performance in an actual structure, whether it is necessary to weaken every joint in a structure, and whether it is necessary to All joints are weakened in the same way, which requires us to carry out experimental research on steel frame structures with ductile joints, rather than a single joint study.

To study the mechanical performance of ductile joints in steel frame structures, we often choose to conduct relevant tests and performance test analysis on steel frame structures. In order to study the seismic performance and related ductility of steel frame structures, we choose to apply horizontal loads to Pseudo-static tests are performed to simulate seismic loading at this level of loading. For such a steel frame with no floor and no retaining wall, the lateral restraint effect of the floor and retaining wall is lost. For such compression-bending and tension-bending members, the corresponding slenderness ratio definitely does not meet the specification requirements, so when the horizontal load is applied, the entire structure may be damaged due to out-of-plane instability of beams and columns. In this way, the ductile failure of the structure we want cannot be achieved, and the ductility performance of the corresponding ductile joints cannot be obtained, so the related research on ductile joints will fall short. For this reason, we should first consider the problem of out-of-plane instability of the steel frame structure when carrying out the test design of the steel frame structure. Under the action, the corresponding ductile failure occurs.

Utility model content

In order to prevent the lateral instability of the steel frame structure test, the utility model aims to provide a test device for the research test of the seismic performance and ductility of the steel frame structure. The technical scheme of the utility model is as follows:

The anti-lateral instability device for the steel frame structure test is composed of multiple support platforms, multiple column restraint devices and multiple beam structure restraint devices;

The support platform is a cubic box-shaped column structure, and multiple rows of bolt holes are reserved on the two opposite vertical surfaces of the box-shaped column structure for fixing horizontal lap connecting rods of different heights, lap connecting rods and support connecting rods. The rods are all angle steel; multiple support platforms of the same structure are fixed on the support bottom beam at intervals; the front and rear ends of the same height between each two adjacent support platforms are respectively connected by horizontal support links The support platforms at both ends are fixed to each other; the two ends of the support connecting rod are fixed on the overlapping connecting rods of the support platforms at both ends;

The column restraint device consists of column restraint guide rails, column restraint sliders and fixtures for fixing the test beam-column model; the horizontal beams are respectively fixed on the opposite facades of the front and rear two support links at the same height between adjacent support platforms. The column restraint guide rail of the test beam-column model, the two column restraint sliders are respectively installed on the respective column restraint guide rails; the column structure of the test beam-column model is between the two column restraint sliders, and the column structure of the test beam-column model is the same as that of the front and rear columns The constraint sliders are fixed to each other by clamps; other column structures of the test beam-column model are fixed between other adjacent support platforms in the same way;

The beam restraint device is composed of beam restraint guide rail, beam restraint slider, tensile connecting rod and fixture for fixing the test beam-column model; The beams of the test beam-column model are perpendicular to each other; the beam constraint slider is installed on the beam constraint guide rail; the beam constraint slider is fixedly installed on the beam constraint slider for connecting to the beam of the test beam-column model beam; the tension link and the test beam The beams of the column model are fixedly connected by clamps; the length of the tension link is variable.

The tension connecting rod is composed of two superimposed rods with bolt holes reserved, and the length of the superposition of the two rods can be reduced or increased as required.

Fixedly install rubber pads on the contact surface between the fixture and the test beam-column model.

Multiple column restraints can be installed on the column structure of each test beam-column model as required.

Multiple beam restraints can be installed on the beam structure of each test beam-column model as required.

The beneficial effect of the utility model is to adjust the installation position of the constraint device according to the size of the test model according to the needs of the designer. The beam restraint device and the column restraint device all adopt the assembled structure, and the corresponding restraint points can be added according to the demand, and the relative distance between the restraints can also be adjusted according to the size of the model. The whole device is easy to install.

Description of drawings

Accompanying drawing 1 is the front elevation view of the column structure restraint device of the present invention.

Accompanying drawing 2 is the top view of the utility model column structure constraint device.

Accompanying drawing 3 is the top view of the beam structure constraint device of the present invention.

In the figure: 1 support platform, 2 lap connecting rod, 3 supporting connecting rod, 4 test beam-column model, 5 column constrained guide rail, 6 column constrained slider, 7 beam constrained guide rail, 8 beam constrained slider, 9 tensile Connecting Rod, 10 Support Bottom Beam

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

The anti-lateral instability device for the steel frame structure test is composed of multiple support platforms, multiple column restraint devices and multiple beam structure restraint devices;

The support platform 1 is a cubic box-shaped column structure, and multiple rows of bolt holes are reserved on the two vertical surfaces opposite to the box-shaped column structure for fixing horizontal lap connecting rods 2 of different heights, lap connecting rods 2 and the support connecting rod 3 are all angle steel; a plurality of support platforms 1 of the same structure are fixed on the support bottom beam 10 at intervals; the front and rear ends of the same height between each two adjacent support platforms are respectively horizontal The support connecting rod 3 fixes the support platforms at both ends of it to each other; the two ends of the support connecting rod 3 are fixed on the overlapping connecting rods 2 of the support platforms at both ends;

The column restraint device is composed of column restraint guide rail 5, column restraint slide block 6 and fixtures for fixing the test beam-column model 4; between adjacent support platforms 1 at the same height, the front and rear support links 3 are opposite to each other. The horizontal column restraint guide rails 5 are respectively fixed on the surface, and the two column restraint sliders 6 are respectively installed on the respective column restraint guide rails 5; between the two column restraint sliders 6 is the column structure of the test beam-column model 4, and the test beam The column structure of the column model 4 and the two front and rear column restraint sliders 6 are fixed together by clamps; the other column structures of the test beam-column model 4 are fixed between other adjacent support platforms in the same way;

The beam restraint device is composed of beam restraint guide rail 7, beam restraint slider 8, tensile connecting rod 9 and clamps for fixing the test beam-column model 4; The upper end on one side of the surface, and perpendicular to the beam of the test beam-column model 4; the beam constraint slider 8 is installed on the beam constraint guide rail 7; the beam constraint slider 8 is fixedly installed for connecting to the beam of the test beam-column model 4 Tensile connecting rod 9; the stretched connecting rod 9 is fixedly connected with the beam of the test beam-column model 4 through a clamp; the length of the stretched connecting rod 9 is variable.

The tension connecting rod 9 is composed of two rods superimposed on each other with bolt holes reserved, and the length of the two rods can be reduced or increased as required.

A rubber pad is fixedly installed on the contact surface between the fixture and the test beam-column model 4.

Multiple column restraint devices can be installed on the column structure of each test beam-column model 4 as required.

Multiple beam restraint devices can be installed on the beam structure of each test beam-column model 4 as required.

The specific installation method of the equipment is as follows:

Assemble the column restraint guide rail 5, the column restraint slider 6 and the fixture to form the column restraint sliding support;

Assembling the tensile connecting rod 9 and the clamp to form a beam-constrained sliding support;

The installation process of the column restraint device: first install the test model 5, and then determine the fixed position of the support platform 1 by measuring the distance, so that each of the two columns of the test model 5 is between the two support platforms 1; The support platform 1 is fixed on the support bottom beam 10 . Calculate the installation height of the column-constrained sliding support theoretically, and install the lap link 2 at this height, fix the lap link 2 with bolts; fix the support link 3 with the lap link 2, and adjust Bolts are used to keep the supporting link 3 parallel to the supporting bottom beam 10. The column-constrained sliding bearing is fixed with the supporting link 3 by bolts.

Two circular section metal beam constraint guide rails 7 are fixed on the steel plate. A group of beam constraint sliders 6 are respectively installed on the two beam constraint guide rails 7, and the upper and lower beam constraint sliders 6 are aligned up and down, and the beam constraint sliding bearings are fixed on the beam constraint sliders 6 by bolts, so that the beam The constrained sliding support can move along the beam constraining guide rail 7 .

Claims (5)

1. steel-frame structure is tested anti-side direction unstability device, a plurality of bearing platforms, a plurality of post restraint device and a plurality of girder construction restraint device, consists of;

Bearing platform (1) is a cube box column structure, reserved many row's bolts hole on two relative vertical planes of box column body structure, be used for the fixedly level overlap joint connecting rod (2) of differing heights, overlap joint connecting rod (2) and support link (3) are all angle steel; Bearing platform (1) interval of a plurality of same structures is fixed on and is supported on bottom girder (10); The front and back end of the sustained height between each two adjacent bearing platforms uses respectively the support link (3) of level that the bearing platform at its two ends is interfixed; The two ends of support link (3) are fixed on the overlap joint connecting rod (2) of its two end bearings platform;

Post restraint device retrains guide rail (5), post constraint slide block (6) by post and forms for the fixture of fixation test beam column model (4); On the relative facade of former and later two support link (3) of the sustained height between adjacent bearing platform (1), the post of fixing horizontal retrains guide rail (5) respectively, and two posts constraint slide blocks (6) are arranged on respectively on post constraint guide rail (5) separately; Between two post constraint slide blocks (6), be the rod structure of test beam column model (4), fixed with each other by fixture between the rod structure of test beam column model (4) and former and later two posts constraint slide block (6); Other rod structure of test beam column model (4) is fixed between other adjacent bearing platform in the same way;

Beam restraint device retrains guide rail (7), beam constraint slide block (8), stretching connecting rod (9) by beam and forms for the fixture of fixation test beam column model (4); Beam constraint guide rail (7) is fixed on the upper end of supporting bottom girder (10) and bearing platform (1) place vertical plane one side, and mutually vertical with the crossbeam of test beam column model (4); Beam constraint slide block (8) is arranged on beam constraint guide rail (7); The upper fixed installation of beam constraint slide block (8) is used for being connected to the stretching connecting rod (9) of test beam column model (4) crossbeam; Stretching connecting rod (9) is fixedly connected with by fixture with the crossbeam of test beam column model (4); The length of stretching connecting rod (9) is variable.

2. steel-frame structure according to claim 1 is tested anti-side direction unstability device, and the connecting rod (9) that it is characterized in that stretching is comprised of two rod members that are reserved with bolt hole that are mutually superimposed, and two rod members reduce or increase the length of stack as required.

3. steel-frame structure according to claim 1 is tested anti-side direction unstability device, it is characterized in that fixedly mounting rubber blanket on the surface of contact of fixture and test beam column model (4).

4. steel-frame structure according to claim 1 is tested anti-side direction unstability device, it is characterized in that on the rod structure of each test beam column model (4), installing as required a plurality of post restraint devices.

5. steel-frame structure according to claim 1 is tested anti-side direction unstability device, it is characterized in that in the girder construction of each test beam column model (4), installing as required a plurality of beam restraint devices.