CFRP加固钢筋混凝土柱的多维拟静力试验研究

A quasi-static test on CFRP strengthened RC columns under combined seismic loading

为了研究多维地震作用下钢筋混凝土柱的 CFRP(碳纤维增强塑料 )加固效果 ,对六个尺寸相同而加固方式不同的矩形截面钢筋混凝土柱进行了拟静力试验研究。荷载采用轴压、双向弯曲、扭转的分别组合或共同作用不同荷载模式 ,以模拟多维地震动。研究结果表明 ,尽管构件的力学响应与加固方式、荷载作用方式有密切的关系 ,但CFRP加固能有效提高试件的延性和承载能力 ,对于多维地震动下的结构是一种理想的加固方法。

For the propose of investigating the strengthening effectiveness of CFRP on RC (reinforced concrete) structures under combined seismic loading, six RC column specimens of the same size strengthened by CFRP sheets with 1 or 2 layers orientated in different directions are studied experimentally by quasi -static test system. Loads including axial pressure, double bending and torsion are applied separately or together to simulate the complex seismic loading. Th e test results show that the technique of CFRP strengthening RC structure is pot ential and effective for significant improvements in ductility and ultimate strength of the structures, in spite of varying responses related on the bonding styles of CFRP and the loadings.