低周往复荷载下纤维混凝土增强框架节点抗剪性能试验研究  

Experimental research of shear behavior of frame joints by fiber reinforced concrete under reversed cyclic loading

作　　者：苏骏[1] 刘健平[1] 李威[1] 陈明[1] 

机构地区：[1]湖北工业大学土木工程与建筑学院,湖北武汉430068

出　　处：《地震工程与工程振动》2016年第2期36-41,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金重点项目(50908029)~~

摘　　要：通过4个高韧性纤维混凝土增强框架节点的低周反复荷载试验,得到了该节点的破坏形态、荷载-位移滞回曲线和骨架曲线,测得了纤维混凝土增强框架节点核心区抗剪承载力试验值,并与现行规范公式的计算值进行了比较分析。结果表明:在框架节点核心区使用高韧性纤维混凝土,可有效控制节点核心区裂缝数量和宽度;节点抗剪承载力和耗能能力均有显著提高,框架的抗震性能得到了增强;抗剪承载力试验值与理论计算值具有较好的一致性,所得结论可为实际工程中纤维混凝土增强框架节点的设计提供参考。Based on the reversed cyclic loading tests on four frame joints of high tough fiber reinforced concrete,the failure modes of the joints,the hysteretic curves and skeleton curves of load displacement were carried out.Meanwhile,the shear bearing capacity of core areas of frame joints of high tough fiber reinforced concrete was measured,and the experiment values are compared with the calculated values by the formulas in current specification. The results showed that the use of high tough fiber reinforced concrete to core areas of frame joints can effectively control the number and width of cracks. Shear capacity and energy dissipation capacity of joints were improved significantly and the seismic performance of framework is enhanced. The test values of shear capacity had good consistency with the calculated values. Thus the research results can provide a theoretical reference for the practical engineering design of fiber reinforced concrete frame joints.

关 键 词：纤维混凝土 框架节点 低周反复荷载 抗剪承载力 

分 类 号：TU317[建筑科学—结构工程] TU375.4