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Constant-axial-force self-balanced loading device for different column section joints

A loading device and self-balancing technology, applied in the direction of applying repeated force/pulsation force to test the strength of materials, etc., can solve the problems that the vertical force cannot be kept constant, the loading frequency and continuity cannot be effectively controlled, and large test errors, etc. , to achieve the effect of effective clamping, avoiding progress delay, and convenient operation

Inactive Publication Date: 2013-07-17
HOHAI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The loading frequency and continuity of the reciprocating load applied by the hydraulic jack cannot be effectively controlled. The vertical force cannot be kept constant, resulting in a large experimental error

Method used

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  • Constant-axial-force self-balanced loading device for different column section joints
  • Constant-axial-force self-balanced loading device for different column section joints

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Embodiment Construction

[0014] For the convenience of description, the "left", "right", "upper" and "lower" referred to below are consistent with the left, right, up and down directions of the drawings themselves, but do not limit the structure of the present invention.

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] like figure 1 , 2 Shown: a constant axial force self-balancing loading device for nodes with different column sections. The two sides of the bottom beam 1 are fixedly connected to the ground through ground anchor bolts. The bottom spherical hinge 2 is placed on the bottom beam after adjusting the angle and fixed with high-strength bolts. The lower reaction force plate 3 is fixedly connected with the bottom spherical hinge 2 with high-strength bolts. The lower clamping structure 7 is fixedly installed on the lower reaction plate 3 by bolts. The lower clamping structure 7 and the up...

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Abstract

The invention discloses a constant-axial-force self-balanced loading device for different column section joints. The constant-axial-force self-balanced loading device comprises a bottom beam, a bottom spherical hinge, a lower reaction plate, a lower clamping structure, a beam-column joint test piece, an upper clamping structure, a hydraulic jack, an upper-end hinge support and an upper reaction plate which are sequentially connected with one another from bottom to top. The upper reaction plate is connected with the lower reaction plate by reaction draw bars, adjusting bolts are respectively mounted on the left side and the right side of the upper clamping structure and the left side and the right side of the lower clamping structure, and steel clamp plates are mounted among the clamping structures and the column-beam joint test piece. The constant-axial-force self-balanced loading device has the advantages that the device can be self-balanced in a test procedure, the axial pressure keeps constant in the test procedure, and the device is simple in structure, convenient to detach, low in material consumption and applicable to tests for hysteretic behavior of the different column section beam-column joints under the condition of low-cycle repetitive load.

Description

technical field [0001] The invention relates to a constant axial force self-balancing loading device for nodes with different column sections, which belongs to the field of concrete buildings. Background technique [0002] In the field of civil engineering, it is very important to study the hysteretic behavior of beam-column joints. In structures containing beam-column joints, the joints are often weak links, and their hysteretic properties have a great influence on the seismic performance of the entire structure. Accurately measuring the hysteretic properties of joints is crucial for evaluating the ductility, deformation capacity and Energy consumption capacity is of great significance. [0003] At present, the quasi-static test is mainly used to study the hysteretic performance of beam-column joints. A constant axial pressure is applied to the column end through a jack, and a low-cycle reciprocating vertical load is applied to the beam end using a hydraulic jack. The vert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/36
Inventor 沈德建崔正华李明殷粉芳江倩艳邓树成
Owner HOHAI UNIV
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