考虑填充墙平面内外相互作用评估RC框架-填充墙结构抗整体性倒塌能力  

GLOBAL COLLAPSE RESISTANCE CAPACITY INVESTIGATION OF INFILLED RC FRAME CONSIDERING IN-PLANE AND OUT-OF-PLANE INTERACTION OF INFILL WALLS

作　　者：韩建平[1,2] 黄林杰[1,2] 孙小云[1,2] 

机构地区：[1]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050 [2]兰州理工大学防震减灾研究所,甘肃兰州730050

出　　处：《工程力学》2016年第9期146-154,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(51268036);甘肃省科技支撑计划项目(1204FKCA126)

摘　　要：首先简要阐述了可模拟填充墙平面内外相互作用的纤维离散化梁-柱单元模型。其次,基于Open Sees分析软件,对某倒塌试验的4层钢筋混凝土框架-填充墙结构进行了数值模拟,数值模拟结果与试验结果的对比表明考虑平面内外相互作用的纤维离散化梁-柱单元模型模拟框架-填充墙结构中的填充墙是有效的。最后,基于校准后的数值分析模型,利用Open Sees分析软件对某钢筋混凝土框架-填充墙结构教学楼,区分考虑和不考虑填充墙平面内外相互作用两种情况,分别建立三维空间模型,进行了静力推覆分析和增量动力分析,进而利用24条地震动记录输入下的增量动力分析结果,给出了具有50%倒塌概率的结构抗整体性倒塌能力。分析结果对比表明不考虑填充墙平面内外相互作用会明显低估结构的抗倒塌能力。Firstly, the model was discussed for beam-column elements with fiber discretization to consider the in-plane and out-of-plane interactions of infill walls. Then, a shaking table test model of a 4-storey infilled RC frame was developed and analyzed via the finite element software, Open Sees. The comparison with the experimental results indicates that the numerical model considering in-plane and out-of-plane interactions of unreinforced masonry infill walls is valid for modeling the infilled RC frame structure. Finally, based on the calibrated numerical model, a three-dimensional model for the infill RC frame of a teaching building was established via Open Sees. And the static pushover analysis and incremental dynamic analysis were carried out on the model with and without considering in-plane and out-of-plane interactions of unreinforced masonry infill walls. Furthermore, incremental dynamic analysis results under 24 suites of ground motion records were used to evaluate the global collapse resistance capacity of the structure with 50% collapse probability. The comparison of the results shows that without considering in-plane and out-of-plane interactions of infill walls, the global collapse resistance capacity of the structure will be underestimated obviously.

关 键 词：平面内与平面外相互作用 填充墙 多层RC框架-填充墙 增量动力分析 抗整体性倒塌能力 

分 类 号：TU352.1[建筑科学—结构工程] TU375.4