半再生混凝土框架的抗震性能  

Seismic performance of reinforced semi-recycled concrete frame

作　　者：吕西林[1] 张翠强[1] 周颖[1] 卢文胜[1] 曹万林[2] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]北京工业大学建筑工程学院,北京100124

出　　处：《中南大学学报（自然科学版）》2014年第4期1214-1226,共13页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51078274);北京市科技计划重大项目(D09050600370000)

摘　　要：为了研究半再生混凝土框架结构的抗震性能,设计一个1/4缩尺8层框架结构的模型,对其进行模拟地震整体结构振动台试验,依次对整体结构进行8度多遇烈度、8度基本烈度、8度罕遇烈度以及更强烈度的地震输入,研究整体结构的破坏模式与抗震性能,并进行整体结构弹塑性时程计算以及易损性分析。研究结果表明:半再生混凝土8层框架破坏模式为强柱弱梁破坏模式;在多遇烈度和罕遇烈度阶段,层间位移角均小于规范限值,满足8度抗震设防要求;半再生混凝土8层框架层间位移角满足规范要求;在多遇烈度下,该结构超越正常使用状态(层间位移角为1/550)概率为79.30%,但在罕遇烈度下,超越生命安全状态(层间位移角为1/50)概率为32.29%,表明该结构依概率满足规范限值要求。The shaking table test on a 1/4 scaled 8-story reinforced semi-recycled concrete （RSRC） frame was conducted to study the failure mode and seismic performance of the frame. The earthquake scenarios of the shaking table test included four levels, i.e. frequently occurred, basic level, and rarely occurred earthquakes of intensity 8, and more strong earthquake larger than rarely occurred earthquakes of intensity 8. Meanwhile, elasto-plastic time history analysis and fragility analysis were carried out to simulate and evaluate the behaviors of the RSRC frame. The results indicate that the failure mechanism of the structure is strong column and weak beam. The structure can meet the requirements in code for seismic design of buildings during the frequently-occurred earthquake as well as the rarely-occurred earthquake. The structure can meet the inter-storey drift ratio limit in code for seismic design of buildings. The probability exceeding the state of Immediately occupation（inter-storey drift ratio is 1/550） is 79.30%, but the probability exceeding the state of life safety（inter-storey drift ratio is 1/50） is 32.29%, which can meet the requirements in the seismic design code in the sense of probability.

关 键 词：半再生混凝土 框架 振动台试验 弹塑性时程分析 易损性分析 

分 类 号：TU375[建筑科学—结构工程] TU317