T形、L形钢管混凝土柱抗震性能试验研究

本文对6根T形6、根L形钢管混凝土柱进行低周反复荷载试验研究,对试件破坏过程及结果进行了较为详细的描述,给出了荷载-位移曲线及骨架曲线。在此基础上,考虑了轴压比、钢管壁厚、内填混凝土强度对T形、L形钢管混凝土柱承载力和延性的影响。得出如下结论:随着轴压比增加,极限荷载提高不显著或下降,延性随着轴压比增加而下降;极限荷载和延性随着钢管壁厚加大而提高;混凝土强度提高对极限荷载增加很显著,但对延性影响不显著。

Experimental study on seismic behavior of concrete-filled steel T-section and L-section columns

This paper presents an experimental study on seismic behavior of six concrete-filled steel T-section columns and six L-section columns under axial compression and cyclic lateral load. The failure procedures and results are described in detail. The load-displacement curves and skeleton curves for each specimen are given. Based on these, the effect of axial compression ratio, thickness of steel tube and strength of filled-in concrete on load-resistant capacity and ductility are investigated. At last, the seismic behavior of T-section columns are compared with that of L-section columns. The following results have been obtained: with the increase of axial compression ratio, the load-resistant capacity does not increase significantly or even reduces, and meanwhile ductility decreases; with the increase of the thickness of steel tube, the load-resistant capacity and ductility are improved; strength of filled-in concrete has a large effect on ultimate strength of specimens, but has no significant effect on ductility.