方钢管混凝土柱抗剪试验研究

Experimental study of square concrete-filled steel tube columns subjected to shearing

对20个方钢管混凝土柱抗剪力学性能的进行试验研究,得出方钢管混凝土柱在剪力作用下的荷载-位移曲线,考察了其力学性能,研究受力破坏过程,并分析了一些参数如剪跨比、轴压比等对抗剪承载力的影响。试验结果表明,方钢管混凝土柱抗剪具有良好的承载能力和塑性性能。最后,推荐了工程设计实用的抗剪承载力计算公式。

An experimental study on the shear resistance performance of 20 square concrete-filled steel tube （CFST） columns was conducted. The load-displacement curves of CFST columns subjected to shearing force were obtained. Meanwhile, the mechanical properties and the failure modes were analysed. The influences of parameters, including shear span ratio and axial compression ratio, upon the shearing behaviour were also investigated. The experimental results indicate that CFST columns have favourable shear bearing capacity and plastic property. Calculation formula of shear bearing capacity for CFST columns in the practical engineering design were recommended.