基于全寿命效费比的地铁上盖隔震(振)结构优化设计方法  

Optimization design method for over-tracking seismic(vibration)isolation structures based on ratio of benefit to life cycle cost

作　　者：王振 李祚华 许亚昆 滕军 何春凯 WANG Zhen;LI Zuohua;XU Yakun;TENG Jun;HE Chunkai(School of Civil and Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China;CABR Shenzhen Construction Technology Co.,Ltd.,Shenzhen 518063,China)

机构地区：[1]哈尔滨工业大学(深圳)土木与环境工程学院,广东深圳518055 [2]深圳中建院建筑科技有限公司,广东深圳518063

出　　处：《地震工程与工程振动》2024年第4期1-14,共14页Earthquake Engineering and Engineering Dynamics

基　　金：国家重点研发计划(2022YFC3801201);深圳市可持续发展专项(KCXFZ202002011010039)。

摘　　要：隔震(振)技术是提升地铁上盖建筑抗震性能和舒适度的有效措施,优化此类结构设计方法具有现实意义和紧迫性。提出了适用于地铁上盖隔震(振)结构的全寿命效费比评估模型;采用基于结构响应的全寿命评估方法,研究了周期比、质量比、隔震层刚度及阻尼等关键结构参数对地铁上盖隔震(振)结构效益的影响;基于遗传算法提出了地铁上盖隔震(振)结构优化设计方法。研究结果表明:增加隔震层后结构地震损失主要集中于下部结构,上、下部结构质量比越大地震损失越小;上下部结构周期比越大,地震损失越小;隔振层刚度与隔振效益呈正相关;采用提出的优化算法对原型结构优化后,地震损失费用可减小30%,竖向振动加速度级可减小2 dB,验证了该方法的可行性。Seismic(vibration)isolation technology is an effective measure to improve the seismic performance and comfort of over-tracking buildings,and the design methods optimization of such structures has practical significance and urgency.This study proposes an evaluation model based on the ratio of benefit to life cycle cost that suitable for over-tracking seismic(vibration)isolation structures.The effects of key structural parameters such as period ratio,mass ratio,stiffness and damping of the isolation layer on the benefits of the over-tracking seismic(vibration)isolation structures were studied.Based on genetic algorithms,an optimal design method for over-tracking seismic(vibration)isolation structures is proposed.The research results show that the seismic losses of the structure after adding isolation layers are mainly concentrated in the substructure,and the greater the mass ratio of the upper and lower structures,the smaller the seismic losses.The period ratio of the upper and lower structures has a greater impact on the overall seismic losses of the structure.The larger the period ratio,the smaller the seismic losses.The stiffness of the isolation layer is positively correlated with the isolation efficiency.After using the optimization algorithm to optimize the prototype structure,both seismic losses and vertical acceleration vibration levels were reduced,verifying the feasibility of this method and providing reference for engineering design.

关 键 词：地铁上盖 隔震(振)结构 全寿命费用 效费比 优化设计 

分 类 号：TU318[建筑科学—结构工程] TU375