Bending torsion test loading device for steel tube concrete pile

Abstract

The invention discloses a bending torsion test loading device for a steel tube concrete pile. According to the bending torsion test loading device for the steel tube concrete pile, two problems that the bending moment condition is not ideal and simple, and the rotation of the steel tube concrete pile is not ideal when the torque is applied in a previous bending torsion test are solved. The bending torsion test loading device comprises two tension jacks, tension sensors, a connection joint, steel wire ropes, round groove discs, a fixed hinge support, a sliding hinge support, two counterforce pillars and rotation supports, wherein the rotation supports are mounted on the fixed hinge support and the sliding hinge support respectively; the two tension jacks are mounted on the outer sides of the two counterforce pillars respectively and located on different sides of the round groove discs on two ends of the steel tube concrete pile; the top ends of the tension jacks are provided with the tension sensors; the tension sensors are connected with the steel wire ropes which are wound on the round groove discs through connection joints. Due to the adoption of the bending torsion test loading device for the steel tube concrete pile, bending torsion test results of the steel tube concrete pile fit with finite element analysis results well. Meanwhile, the bending torsion test loading device for the steel tube concrete pile also has the characteristics of convenience in assembly and recyclability.

Description

technical field [0001] The invention relates to the technical field of civil engineering building structure tests, in particular to a loading device for bending and torsion tests of steel tube concrete columns. Background technique [0002] In civil engineering, steel pipe concrete is used as frame corner columns of buildings, piers of curved bridges and skew bridges of expressways, columns of offshore oil production platforms, directional towers of airports and central columns of spiral stairs, etc., under wind load Under the action of earthquake and earthquake, in addition to the axial pressure and bending moment, there is also the joint action of torque. Although the simultaneous bending and torsion of CFST is rare in actual engineering, the study of the working performance of bending-torsion members will help to understand the performance of compression-bending-torsion members and compression-bending-torsion-shear members. There is a need for in-depth research. [...

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Problems solved by technology

[0003] At present, there are few experiments to study the bending and torsion of CFST columns. The main reason is that the loading device is difficult to realize. When the bending moment is applied, the friction between the CFST column and the CFST column is relatively large, which affects the rotation. value, there is a large gap between the test results and the finite element analysis results, which cannot better guide engineering practice

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