填充墙框架结构延性破坏准则  

Ductility failure criterion for infilled-wall frame structures

作　　者：付国[1] 何斌[1] 吴守军[1] FU Guo;HE Bin;WU Shoujun(College of Water Resource and Architectural Engineering,Northwest A&F University,Yangling 712100,China)

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《建筑结构学报》2022年第11期117-125,共9页Journal of Building Structures

基　　金：国家自然科学基金项目(52008339);陕西省自然科学基础研究计划项目(2017 JQ5113)。

摘　　要：填充墙框架结构与纯框架结构抗震性能差异显著,建立填充墙框架结构的破坏准则,有助于揭示填充墙破坏对结构整体性能的影响规律,阐明其性能退化机理。为此,对14组共59榀不开洞填充墙框架模型的变形能力和承载力对结构性能退化的影响规律进行研究,得到破坏过程中框架柱、填充墙及整体性能退化之间的量化关系,进而提出不开洞填充墙框架的延性破坏准则和性能评价标准。研究结果表明:填充墙框架模型对应延性准则的破坏指数平均值在0.724~0.928之间,延性准则能够实现填充墙框架结构倒塌破坏的量化表征;综合6组19榀填充墙框架的试验现象、性能退化特点和破坏指数统计结果,建议中等破坏和严重破坏临界点破坏指数分别取0.1和0.4,延性准则可用于填充墙框架结构的抗震性能研究和倒塌破坏评估。The seismic performance of frame structures significantly differs to that of infilled-wall frame structures.Establishing failure criterion for the infilled-wall frame structure is helpful to reveal the effect of the damage of infilled-wall on the overall performance of infilled-wall frame structure,and clarify its performance degradation mechanism.In the present work,the deformation ability and bearing capacity of 59 infilled-wall frame structures in 14 groups were obtained,and their influence on performance degradation were studied.The effects of frame column,infilled-wall and frame on the failure of infilled-wall frame structure were established quantitatively.Furthermore,the ductile failure criterion and performance evaluation standard of infilled-wall frame structure were proposed.The results show that the average damage index calculated by the proposed ductile failure criterion is in the range of 0.724-0.928,suggesting the proposed ductile criterion can quantitatively describe the failure of infilled-wall frame structure.By comprehensively considering the experimental phenomena,characteristics of performance degradation and damage index of 19 infilled-wall frame structures in six groups,the critical damage index corresponding to medium damage and severe damage was recommended to be 0.1 and 0.4 respectively.The proposed ductile failure criterion is suitable for seismic performance study and damage evaluation of infilled-wall frame structures.

关 键 词：填充墙框架 变形能力 延性准则 性能退化 破坏指数 

分 类 号：TU375.401[建筑科学—结构工程]