高强钢绞线网-聚合物砂浆抗震加固框架梁柱节点的试验研究  

Experimental study on beam-column connections strengthened with high-strength steel wire mesh and polymer mortar

作　　者：曹忠民[1] 李爱群[1] 王亚勇[2] 姚秋来[2] 

机构地区：[1]东南大学土木工程学院 [2]中国建筑科学研究院工程抗震研究所,北京100013

出　　处：《建筑结构学报》2006年第4期10-15,共6页Journal of Building Structures

基　　金：建设部研究开发项目(05-k4-18)

摘　　要：进行了4个采用高强钢绞线网-聚合物砂浆加固的钢筋混凝土框架节点和1个对比节点的低周反复荷载试验,比较了4种加固方案的破坏形态、承载力、延性和刚度退化等抗震性能。研究结果表明:采用高强钢绞线网-聚合物砂浆加固后,节点的极限受剪承载力提高了19%左右,破坏形态更加具有延性特征。分析了相应的加固机理,并提出了高强钢绞线网-聚合物砂浆加固钢筋混凝土框架节点受剪承载力的计算方法,计算结果与试验结果符合良好。Four beam-column model connections strengthened with high-strength steel wire mesh and polymer mortar and one control model with nonductile reinforcement details were tested under reversed cyclic loading to study the effect of seismic retrofit. Comparisons of the ultimate strength, ductility, failure mode, and stiffness degradation of the strengthened and the control models showed the beneficial effects of the wire mesh and mortar. The shear-resisting capacity of strengthened connections was increase up to 19%, and the brittle joint shear failure mode was transformed into ductile failure mode with plastic hinging at beam ends. Based on the analysis of the strengthening mechanism, a method was proposed for calculating the shear strength of the beam-column connections strengthened with steel wire mesh and polymer mortar.

关 键 词：梁柱节点 加固 高强钢绞线网 聚合物砂浆 试验研究 

分 类 号：TU375.4[建筑科学—结构工程] TU317.1