顶板开洞断面地铁车站的弹塑性地震响应参数化分析  

Parameteric Analysis on the Elasto-plastic Seismic Performance of Underground Station Structures with Opening Hole on the Roof

作　　者：周兵[1] 薛荣乐 周臻[2] 王永玮 Zhou Bing;Xue Rongle;Zhou Zhen;Wang Yongwei(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063 [2]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096

出　　处：《特种结构》2020年第3期48-54,共7页Special Structures

基　　金：国家重点研发计划(2018YFC0705700);国家自然科学基金(51878150)。

摘　　要：基于土-结构相互作用的弹塑性动力分析,研究顶板开洞对地铁车站地震响应的影响机理。首先介绍了粘弹性人工边界地震动的输入方法,验证了粘弹性人工边界及地震动输入方式的可靠性;然后进行了钢筋和考虑受拉混凝土单轴本构的二次开发,验证了模型的可靠性;最后,通过ABAQUS有限元软件,以某中庭式地铁车站为原型,研究是否开洞、开洞尺寸及开洞位置对车站地震响应的影响。研究结果表明:顶板开洞降低地铁车站刚度,且随开洞尺寸的增大,其对刚度的削弱越严重,因此开洞车站水平加速度小于未开洞车站,而位移呈相反趋势;中庭顶板开洞方式引起的车站结构受力较为均匀,其地震响应对于结构设计的影响小于其他工况计算的结果。Based on the elasto-plastic analysis of soil-structure interaction,the parameter of underground station with opening hole on the sides roof was analyzed.The method of ground motion input with viscoelastic artificial boundary was introduced firstly and the reliability of the viscoelastic boundary and ground motion input method were verified.Then the uniaxial constitutive model of steel bars and concrete considering tension was developed and verified.Lastly,based on a subway station with an atrium roof,the parameter of station including without opening hole,the size and position of opening hole were calculated with ABAQUS.The results showed that the opening hole in roof reduce the stiffness of subway station and with the increasing of size of hole,the stiffness is weaken more seriously.Therefore,the horizontal acceleration of subway station with opening hole is larger than station without hole while displacement showed the opposite trend.Because of the force in subway station with opening hole at atrium roof was more uniform,and the influence of its seismic response on structural design was less than other conditions.

关 键 词：开洞断面 地铁车站抗震 二次开发 参数化分析 混凝土损伤 

分 类 号：U231.4[交通运输工程—道路与铁道工程]