中、小型铁路客站钢网架-混凝土框架混合结构体系地震易损性研究  

Seismic fragility analysis of steel latticed roof-concrete frame structure of small and medium sized railway passenger station

作　　者：吕晓寅[1] 刘书壮 李超慧 邢佶慧[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]首创置业股份有限公司,北京100022

出　　处：《建筑结构学报》2016年第S1期85-92,共8页Journal of Building Structures

基　　金：国家自然科学基金面上项目(51278036)

摘　　要：针对中、小型铁路客站典型钢网架-大开间、大开洞混凝土框架混合结构体系,选取8条天然地震波,以地面峰值加速度为地震动强度指标,最大层间位移角为结构损伤指标,采用增量动力分析法,开展了地震灾变行为研究,进行地震易损性评估。结果表明:分析混合结构体系在地震作用下的位移响应时,宜采用三向或水平双向地震动输入;强震下混合结构体系的破坏主要集中在下部混凝土框架结构,钢屋盖的塑性发展滞后于下部结构;1/450、1/280、1/95和1/45可作为中、小型铁路客站站房结构OP、IO、LS和CP四个性能水准对应的层间位移角限值。Research on seismic behavior of structures with steel latticed steel roof and large bay and large opening concrete frames,which are the typical structural system adopted in small and medium size railway passenger stations was carried out. The peak ground acceleration and maximum inter-story drift ratio were extracted as ground motion intensity index and structural damage index respectively to perform the incremental dynamic analysis under eight earthquake waves. Moreover,seismic fragility of real railway stations with latticed steel roof-concrete frame structure was also investigated. Research results show that three dimensional earthquake input or at least two horizontal earthquake excitations should be considered in the analysis of dynamic response of such structures. Under strong earthquakes,damage concentrates mainly in the concrete frames and the plasticity in steel roof is developed later than the yielding of the concrete frame. In addition,1 /450,1 /280,1 /95 and 1 /45 are proposed as the design limits of inter-story drift ratio according to the OP,IO,LS and CP seismic performance levels for small and medium size railway passenger stations.

关 键 词：中、小型铁路客站 钢网架-混凝土框架混合结构 增量动力分析 地震易损性 风险评估 

分 类 号：TU398.9[建筑科学—结构工程] TU311.3