空间填充墙RC框架结构的静力弹塑性分析

现行规范对填充墙框架结构体系抗震设计方法存在不足之处.针对砌体填充墙框架结构水平地震作用下的受力特点, 结合填充墙的破坏特征, 建立墙框协同作用简化分析的空间等效斜撑力学模型, 在保持框架结构质量分布基本不变的情况下, 分别对两类填充墙竖向均匀、不均匀布置的带楼板框架结构和无填充墙仅带楼板框架结构进行不同加载模式下的静力弹塑性分析, 研究结构的基底剪力-顶点位移关系曲线、不同地震水平作用下结构层间位移角以及塑性铰的发展情况, 并对填充墙框架结构规范提供的设计方法进行安全评估.研究结果可为框架结构的抗震设计、评估及加固提供参考.

Pushover Analysis of Spatial Infilled Wall-RC Frame Structures

There was shortcoming in seismic design of infilled walls-frame structures in the present codes.The mechanical model of spatial infilled frame structure was set up by adopting the equivalent diagonal bracing mode,for which the character applied to the horizontal earthquake action to masonry infilled walls-frame structures can be shown,in combination with the failure mode of infilled walls. Three spatial models of frame structures with the slabs were provided with well-proportioned or disproportional infilled walls vertically,or without infilled walls. And then the pushover analysis of each model was carried out by two common load patterns. Such seismic indicators were analyzed and compared as the relationship curve of base shear force and roof lateral displacement,and plastic hinges distribution under different earthquake criteria. The analysis results can be referred as seismic design,performance evaluation and reinforcement design for frame structures.