Steel-concrete composite column anti-seismic anti-torsion test loading device and manufacturing method thereof

Abstract

The invention relates to a steel-concrete composite column anti-seismic anti-torsion test loading device and a manufacturing method thereof, and belongs to the technical field of structure engineering. The steel-concrete composite column anti-seismic anti-torsion test loading device comprises a loading frame, a top beam, a base, an antifriction plate, a thrust jack, and two electro-hydraulic servo actuators. The loading frame is obtained by welding steel plates. All column bases of the loading frame are provided with bolt holes and are fixedly connected to the ground by ground anchor bolts. The top beam is obtained by welding steel plates. The bottom of the top beam is provided with bolt holes and is fixedly connected to a top steel plate of a test piece by bolts. The base is obtained by welding steel plates. The top of the base is provided with bolt holes and is connected to a bottom steel plate of the test piece by bolts. An upper end of the thrust jack is connected to the loading frame by a rolling bearing. The antifriction plate is horizontally arranged in the center of the top of the top beam. The electro-hydraulic servo actuators are arranged horizontally and are fixedly connected to the top beam. The steel-concrete composite column anti-seismic anti-torsion test loading device solves the problem of the prior art, has a simple structure, is convenient for use, has strong universality, can be used for anti-seismic anti-torsion tests on various steel-concrete composite columns, and has wide application prospects.

Description

technical field [0001] The invention relates to a loading device for an aseismic and torsional test of a steel-concrete composite column, belonging to the technical field of structural engineering, in particular to the technical field of structural engineering testing. Background technique [0002] Steel-concrete composite columns have been widely used in engineering practice, and their main types include concrete-filled steel tube columns shown in Fig. la and figure 1 Steel reinforced concrete column shown in b. The torsional performance of steel-concrete composite columns is a matter of great concern in seismic design. Under the action of horizontal earthquakes in the longitudinal direction of the actual bridge structure, in addition to the axial force and bending moment, there are also torque effects in the pier columns. As a result, the piers of the bridge are in a state of combined axial force-bending moment-torque. Under the combined stress state, the pier column is ...

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Problems solved by technology

However, the traditional torsion test loading device and test method have the following deficiencies: (1) The loading stroke is insufficient. Due to the better torsional ductility of the steel-concrete composite column, the torsion angle is larger at the limit state of the bearing capacity, so the test cannot be obtained. (2) The load mode is single, and only static torque and bending moment can be applied to the specimen alone, and the composite load of axial force, bending moment and torque with reciprocating characteristics cannot be applied; (3) Stable loading The stroke is small, and when the torsion angle is large, the displacement at the loading point has a nonlinear relationship with the torsion angle of the specimen, which makes it difficult to control the load increment in the later stage of loading; It is difficult to conduct a large number of parameter analysis on the seismic and torsional performance of composite columns

In view of the above reasons, the current seismic and torsional test research on steel-concrete composite columns is very difficult, and there is a lack of sufficient and reliable test data to provide scientific basis for engineering design.

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