钢筋混凝土管柱-钢桁架混合结构抗震性能  

Seismic performance of vertical hybrid structure consisting of reinforced concrete pipe column and steel truss

作　　者：岳健广[1] 钱江[1] 白国良[2] 李红星[3] 雷拓[1] 

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]西安建筑科技大学土木学院,陕西西安710055 [3]西北电力设计院,陕西西安710032

出　　处：《江苏大学学报（自然科学版）》2010年第5期606-611,共6页Journal of Jiangsu University：Natural Science Edition

基　　金："973"国家重点基础研究发展计划项目(2007CB714202)

摘　　要：以某钢筋混凝土管柱-钢桁架竖向混合结构为背景,采用集中塑性铰有限元模型,对该结构进行动力弹塑性计算,分析了该结构的破坏机理.基于结构内容物的抗震设防指标,评价了结构的抗震性能水准,研究了钢筋混凝土管柱纵筋配筋率和壁径比对混合结构抗震性能的影响.研究表明,在7度罕遇地震作用下,该结构满足基于内容物的抗震设防基本要求;结构破坏集中在柱根,为单道防线的柱铰破坏模式;角柱与内柱为结构薄弱环节;钢桁架屈服杆件主要分布在悬挑端及与柱头连接的区域;建议该结构的柱纵筋最小配筋率不小于0.5%,柱壁径比不小于0.100.By means of the plastic hinge method,an elastic-plastic model for an actual structure was established.The failure mechanism of the structure was analyzed by the elastic-plastic time-history analysis.According to the performance index of the internal-equipment-based seismic design method,the seismic performance of the structure,and the effect of the reinforcement ratio and wall diameter ratio of the concrete pipe column were analyzed.The results indicate that under the 7-degree intensity of the seldomly occurred earthquake,the seismic performance level of the structure is satisfied with the basic fortification requirement of the internal-equipment-based seismic design.The columns are the single defense line for the structure to resist the earthquake action,and the corner/inner columns are firstly damaged.Most plastic hinges of the steel truss occur in the cantilever range and around the top of the columns.The total longitudinal reinforcement ratio and wall diameter ratio of the concrete pipe column could be greater than 0.5% and 0.100,respectively.

关 键 词：钢筋混凝土管柱 混合结构 配筋率 壁径比 塑性铰 

分 类 号：TU375[建筑科学—结构工程] TU313