Pressure torsion test loading device for steel tube concrete pile

Abstract

The invention discloses a pressure torsion test loading device for a steel tube concrete pile. Through the pressure torsion test loading device for the steel tube concrete pile, two problems that the rotation of the steel tube concrete pile is affected when the pressure is applied in a previous pressure torsion test and the torque change rule in the test process is not constant are solved. The pressure torsion test loading device for the steel tube concrete pile comprises a pressure jack, a pressure sensor, a pressure bearing, a round groove disc, a rolling shaft support, a tension jack and a tension sensor, wherein counterforce pillars are mounted on the ground; the pressure jack is mounted on the counterforce pillar at one side; the front end of the pressure jack is provided with the pressure sensor and the pressure bearing; the top end of the tension jack is provided with the tension sensor which is connected with a steel wire rope wound on the round groove disc; the rolling shaft support and a pedestal are mounted under the round groove disc. In test, the steel tube concrete pile is mounted on the counterforce pillars; the other end of the steel tube concrete pile is mounted on the round groove disc; a torque is provided by the tension jack; an axial pressure is provided by the pressure jack; load values are collected by the two sensors. The pressure torsion test loading device for the steel tube concrete pile also has the characteristics of simple overall structure, convenience in assembly and recyclability, and the like.

Description

technical field [0001] The invention relates to the technical field of test of civil engineering building components, in particular it is a loading device for compression and torsion tests of steel tube concrete columns. Background technique [0002] In civil engineering, when the side columns of steel tube concrete frames, power transmission towers and leg columns of offshore oil production platforms are subjected to wind and earthquake loads, there may be a state of compression and torsion. At present, there are few experiments to study the compression and torsion of CFST columns. The main reason is that the loading device is difficult to realize. When the axial pressure is applied, the friction between the CFST column and the CFST column is relatively large, which affects the rotation; when the torque is applied, the change law is not constant and can only be approximated. The difference between the test results and the finite element analysis results is large, which cann...

AI Technical Summary

Problems solved by technology

[0004] The advantages of the present invention are: solve the two major problems of affecting the rotation of the concrete filled steel pipe column when the pressure is applied in the previous compression torsion test and the inconstant torque variation law during the test process, the results of the compression and torsion test of the steel tube concrete column after the present invention are compared with the finite element The analysis results are in good agreement, and the present invention also has the characteristics of convenient assembly and recyclable use.

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