摘要
目前关于地下结构地震响应的分析大多是计算给定的地下结构在给定地震动下的动力响应,而该结构在该动力响应下是否已破坏则不得而知,这就需进行地下结构抗震性能评价方法的研究。首先总结了目前国内外在地下框架结构破坏评价方法方面的研究,在此基础上,结合《建筑抗震设计规范》,提出了新的评价方法:基于层间位移角的构件变形能力评价和基于有效应力值的构件强度评价。然后,以地铁车站及地下人防工程等地下框架结构为例,建立其三维分析模型,计算其三维地震响应,主要包括结构的水平横向相对位移和结构受力,对地下框架结构抗震性能进行评价。分析表明:所提出的评价方法能初步应用于地下框架结构的抗震性能评价,但仍需进一步完善。研究成果和思路可为《建筑抗震设计规范》中地下建筑结构部分的补充和完善提供有益的帮助。
The study on seismic responses of underground structures is focusing on the specific structure under a given earthquake,and the safety of the structure is not known under the seismic responses.Therefore,much attention should be paid to the evaluation method for underground frame structures during earthquake.The researches on the evaluation methods for underground structures are summarized.A new evaluation method is presented based on the former research results and Chinese code for seismic design of buildings.The story drift angle is adopted to evaluate the deformability of structural components,and the effective stress value is employed to evaluate the strength of structural components in the method.Then,three-dimensional analysis models for underground frame structures,such as subway stations and civil defense engineering,are established and the seismic responses are calculated,including horizontal relative displacement and inner forces of structures.The seismic behaviors of these underground structures are evaluated.It can be seen from the analysis that the proposed evaluation method can be used to evaluate the seismic behaviors of underground frame structures,whereas it needs to be improved.The research results and approach are helpful for the supplementation and perfection of underground structures in Chinese code for seismic design of buildings.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2011年第4期593-598,共6页
Chinese Journal of Geotechnical Engineering
基金
中央高校基本科研业务费专项资金项目(2010-IV-010)
武汉市城乡建设委员会2010年科技项目
2010年度湖北省自然科学基金项目(2010CDB01005)
关键词
地下框架结构
地震响应
评价方法
层间位移角
underground frame structure
seismic response
evaluation method
story drift angle
