摘要
某框架结构位于7度(0.1 g)抗震设防区域,楼(屋)面有多处开洞且尺寸较大,属于高烈度下的平面不规则结构。采用NosaCAD结构分析软件分别按弹性和刚性楼面假定对该结构进行弹塑性时程分析,研究该结构在7度罕遇地震作用下的抗震性能。分析结果表明:罕遇地震下,塑性铰首先出现在梁上,部分柱子一端出现塑性铰。结构最大层间位移角小于规范限值1/50,可以满足"大震不倒"的抗震设防要求。楼面大开洞对该结构的变形和整体损伤状况有一定影响。刚性楼面假定下的结构只呈现平动响应,弹性楼面假定下结构出现扭转响应并且构件损伤程度大于刚性楼面假定下的计算结果。
With large opening floors, a frame structure,which is located in 7 seismic intensity （0.1 g） area, is an irregular plane building structure under the high seismic intensity area. In this paper, in order to study seismic behaviors of the structure in rare intensity of 7 degree （0.1 g） earthquakes, NosaCAD was used to perform elasto-plastic time history analysis. The results indicate that yielding hinges firstly occur in some beams under rare frequency earthquakes. Some yielding hinges appear at one end of some columns. The maximum inter-story drift of the structure can meet the requirement of the Chinese code. The structure satisfies the code requirements of no collapse under rare earthquakes. The irregular floors have some effect on deformation and damage of the structure. There are only translational responses for the rigid-floor assumed structure, but not only torsional response but also relative large component damage occur inthe elastic-floor assumed structure.
出处
《结构工程师》
北大核心
2017年第2期70-78,共9页
Structural Engineers
