低周反复荷载下再生混凝土密肋复合墙体抗震性能试验研究  

Mechanical characteristics and seismic performance of multi-rib slab wall

作　　者：姚谦峰[1,2] 余晓峰[1] 张荫[1] 黄炜[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《建筑结构学报》2009年第S2期1-6,共6页Journal of Building Structures

基　　金：国家自然科学基金项目(50578021);陕西省自然科学基金(2006E214);陕西省教育厅专项基金(06JK254)

摘　　要：对3榀1∶2比例模型,再生骨料取代率分别为100%、50%和0的密肋复合墙体,进行低周反复水平荷载作用下的抗震性能对比试验。研究了再生混凝土密肋复合墙体的破坏机制、承载力、延性、滞回特性、耗能及刚度退化等性能,建立了再生混凝土墙体的退化三线型恢复力模型。研究发现:墙体属于剪切破坏;对于最大水平承载力,50%取代率的墙体和普通混凝土墙体相比没有下降,而100%取代率墙体承载力下降18%;对于延性系数,随着取代率的增加而提高;对于耗能能力,3榀墙体差别不大。试验表明:50%取代率密肋复合墙体具有良好的抗震性能,应用于实际工程完全可行;而100%取代率墙体需慎用。Under low-cyclic horizontal loading,three recycled concrete multi-ribbed composite walls(composed of 100%,50%,0 recycled aggregate) are studied in this paper.The seismic behaviors of recycled concrete multi-ribbed composite walls,such as the failure patterns,hysteretic loop,ductility,deterioration of stiffness and energy dissipation,etc.,are examined.Finally,tri-linear retrograde restoring force model of the recycled concrete wall is established.The test results indicate: the failure pattern of the multi-ribbed wall using recycled concrete is shearing failure;the maximum horizontal bearing capacity of the recycled concrete multi-ribbed wall,composed of 50% recycled aggregate,is no less than the natural concrete wall,however,the bearing capacity of the wall,composed of 100% recycled aggregate,is lowered by 18%;ductility factors increase as the replacement rate of recycled aggregate increase;the three multi-ribbed walls have no difference in energy dissipation.This study concludes that the recycled concrete multi-ribbed wall,whose displacement rate is 50%,has better seismic properties and is quite feasible for practical civil engineering;the recycled concrete multi-ribbed wall,whose displacement rate is 100%,should be used carefully.

关 键 词：密肋复合墙体 再生混凝土 恢复力模型 延性 刚度退化 耗能 

分 类 号：TU399[建筑科学—结构工程] TU311.3