上盖框架建筑的大底盘地铁车站结构抗震计算的振型分解法-反应加速度法  

Mode Decomposition Method-reaction Acceleration Method for Seismic Analysis of Metro Station Structure with Large Chassis of Upper Frame Building

作　　者：李明 安军海 张学辉[1,2] 岳宏亮 赵志杰[1,2] LI Ming;AN Jun-hai;ZHANG Xue-hui;YUE Hong-liang;ZHAO Zhi-jie(School of Civil Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China;Innovation Center of Disaster Prevention and Mitigation Technology for Geotechnical and Structural Systems of Hebei Province(Preparation),Shijiazhuang 050018,China)

机构地区：[1]河北科技大学建筑工程学院,石家庄050018 [2]河北省岩土与结构体系防灾减灾技术创新中心(筹),石家庄050018

出　　处：《科学技术与工程》2023年第8期3403-3413,共11页Science Technology and Engineering

基　　金：河北省自然科学基金(E2019208150);河北省高等学校科学技术研究项目(QN2018089);河北科技大学教学改革项目(2019-YBA20)。

摘　　要：为得到上盖框架建筑时大底盘地铁车站结构的实用抗震设计方法,基于系列土-地铁车站及其上盖框架结构体系动力相互作用数值模拟试验,揭示了上盖框架结构对大底盘地铁车站结构地震响应的影响规律,再在借鉴地下结构抗震计算传统反应加速度法的基础上,提出一种适用于地上、地下一体化结构体系中的地下结构抗震分析的振型分解法-反应加速度法。首先,从理论上验证了振型分解法-反应加速度法的可行性,并详细介绍了该方法的力学模型和实施步骤;其次,以北京某核心区地铁车站与上盖高层建筑一体化工程为背景,对比时程法和传统反应加速度法的计算结果,分析了峰值加速度、结构刚度、土层刚度、上盖结构高度、地震波类型等影响因素下振型分解法-反应加速度法的计算效果。结果表明:所提出的振型分解法-反应加速度法是一个操作简便、精度较高且计算结果偏于安全的简化分析方法,可在类似工程的抗震计算中应用。In order to obtain the practical seismic design method of the metro station structure with large chassis of upper frame buildings,the influence law of upper frame building structure on seismic response of metro station structure was investigated based on series of numerical simulation experiments on dynamic interaction of soil-metro station with the upper frame building system and a simplified method called mode decomposition method-reaction acceleration method was proposed for the seismic design of seismic analysis of underground structure in the integrated structure system which refered to the basic principle of traditional reaction acceleration method as well.Firstly,the feasibility of mode decomposition-reaction acceleration method was verified theoretically,and the mechanical model and implementation steps of the proposed method were introduced in detail.Secondly,taking the integration project of subway station and upper cover high-rise building in a core area of Beijing as the background,the influence factors such as peak acceleration,structural stiffness,soil stiffness,upper cover structure height and seismic wave type were used to analyze computational accuracy of mode decomposition method-reaction acceleration method by comparing with the results of time history method and traditional reaction acceleration method.The results show that the proposed method is a simplified analysis method with simple operation,high accuracy and calculating results biased towards safety,which can be applied to the seismic calculation of similar projects.

关 键 词：抗震分析 地铁车站 上盖框架结构 振型分解法 反应加速度法 

分 类 号：TU247[建筑科学—建筑设计及理论] TU352.11