基于多质点模型的地铁上盖框架-剪力墙结构抗震性能分析  

Seismic Performance Analysis for Upper Cover Frame-Shear Wall Structure of Urban Rail Transit Based on Flexure-Shear Type MDOF Nodel

作　　者：甘懿德 顾伟华 崔家春 GAN Yide;GU Weihua;CUI Jiachun(Shanghai Scientific Technology Development Branch of Arcplus Group PLC,Shanghai 200041,China;Arcplus Group PLC,Shanghai 200041,China)

机构地区：[1]华东建筑集团股份有限公司上海科技发展分公司,上海200041 [2]华东建筑集团股份有限公司,上海200041

出　　处：《结构工程师》2025年第1期74-83,共10页Structural Engineers

基　　金：上海市科技计划项目(21DZ1203401)。

摘　　要：针对地铁车辆基地上盖框架-剪力墙结构,基于Opensees提出了一种可以考虑抗震结构、15m层间单体隔震结构、9m层间单体隔震结构和9m层间整体隔震结构等多种结构方案的简化弯剪型多质点模型以及相应的参数标定方法,并通过与某地铁车辆基地上盖框架单体有限元分析结果的对比,验证了所提出计算模型的准确性。对比15m层间单体隔震结构和9m层间整体隔震结构的分析结果后发现,15m层间单体隔震质量参与系数最大的振型为以盖下结构振动为主的第三阶振型,而9m层间整体隔震结构质量参与系数最大的振型为周期最长的一阶隔震振型。弹塑性时程分析结果表明,9m层间整体隔震结构相比于15m层间单体隔震结构,能够减小38.4%的盖上结构层间剪力和71.4%的盖下结构层间剪力,同时使得最大弹塑性层间位移角减小50%。A simplified analysis method for upper cover frame-shear wall structures of urban rail transit was proposed based on the flexure-shear type MDOF model in Opensees.This method can consider various structural schemes of upper cover frame-shear wall structure,including seismic-resistant structure,15-meter-story individual isolation structure,9-meter-story individual isolation structure and 9-meter-story monolithic isolation structure.The corresponding parameter calibration method was also presented.The accuracy of the proposed method was verified by comparing analysis with the finite element analysis results of an upper cover shear wall structure.Comparing the analysis results of the 15-meter-story individual isolation structure and the 9-meter-story individual isolation structure,it was found that the dominant vibration mode with the highest participation coefficient of the former is the third mode,mainly characterized by the vibration of the upper structure.On the other hand,that of the latter is the first mode,which has the longest period and mainly characterized by the vibration of the structure above isolation layer.The results of the elastoplastic seismic time history analysis show that the 9-meter-story individual isolation structure can reduce the inter-story shear force of the upper structure by 38.4%and that of the substructure by 71.4%compared to the 15-meter-story individual isolation structure,with 50%reduction of the inter-story drift.

关 键 词：地铁车辆基地上盖 弯剪型多质点模型 弹塑性地震时程分析 抗震设计 

分 类 号：TU375.4[建筑科学—结构工程]