BFRP与CFRP约束混凝土短柱抗震性能计算分析  

Computational evaluation of seismic performance of short columns confined with BFRP and CFRP

作　　者：欧阳利军[1,2] 陆洲导[2] 陈惟珍[3] 

机构地区：[1]同济大学航空航天与力学学院,上海200092 [2]同济大学土木工程学院,上海200092 [3]同济大学结构工程与防灾研究所,上海200092

出　　处：《江苏大学学报（自然科学版）》2013年第4期460-465,共6页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50778134);土木工程防灾国家重点实验室基金资助项目(SLDRCE09-D-02);温州市科技计划项目(G20080053)

摘　　要：为分析玄武岩纤维布和碳纤维布约束混凝土短柱的抗震性能,对5根采用了2种纤维布横向包裹约束的混凝土短柱和1根对比混凝土短柱进行了低周反复荷载试验,分析了各试件的延性、刚度和承载力退化规律、等效粘滞阻尼系数,对各试件耗能能力进行了比较.BFRP布和CFRP布约束短柱极限荷载最大提高幅度分别为12.3%和9.7%,极限位移最大提高幅度分别为58.3%和83.3%.同等工况下,2种纤维布约束混凝土短柱的抗震性能相近.试验中,玄武岩纤维布和碳纤维布的抗拉强度均未充分发挥.To investigate the seismic performance of short columns confined with BFRP and CFRP, the low cyclic loading tests were conducted on one comparative short column and five RC short columns confined with two types of composites. Ductility, degeneration laws of stiffness and bearing capacity, equivalent viscous damping coefficient were analyzed. The energy dissipation ability of specimens was compared. The results show that the maximum increases of ultimate load of column confined by BFRP and CFRP are 12.3% and 9.7% , respectively. The maximum increases of ultimate displacement are 58.3% and 83.3% , respectively. The confined specimens show similar seismic performance under the same conditions. The high tensile strength of BFRP and CFRP does not play full role in the tests.

关 键 词：短柱 玄武岩纤维 碳纤维 约束 抗震性能 

分 类 号：TU375.3[建筑科学—结构工程]