内外双重张弦网壳结构罕遇地震下的弹塑性动力响应分析  

Analysis on elastic-plastic dynamic responses of double inner and outer latticed shell string structure under rare earthquake

作　　者：马广英 姚云龙[2,3] 周观根[1] 夏巨伟 杨大彬 MA Guang-ying;YAO Yun-long;ZHOU Guan-gen;XIA Ju-wei;YANG Da-bin(Zhejiang Southeast Space Frame Co.,LTD,Hangzhou 311209,China;Associated Engineering Research Center of Mechanics&Mechatronic Equipment,Shandong Uniersity,Weihai 264209,China;Zhejiang Provincial Key Laboratory of Space Structures,Hangzhou 310058,China;Shanghai Constuctions Group Co.,LTD,Shanghai 200080,China;School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]浙江东南网架股份有限公司,浙江杭州311209 [2]山东大学力学与机电装备联合工程技术研究中心,山东威海264209 [3]浙江省空间结构重点实验室,浙江杭州310058 [4]上海建工集团股份有限公司,上海200080 [5]山东建筑大学土木工程学院,山东济南250101

出　　处：《空间结构》2021年第4期85-96,84,共13页Spatial Structures

基　　金：Shandong Provincial Natural Science Foundation(ZR2017MEE045);Foundation of Zhejiang Provincial Key Laboratory of Space Structures(201703);Shanghai Rising-Star Program(No.18QB1402200)。

摘　　要：通过对不同跨度、不同初始预张力、不同下部结构形式、不同支座连接条件、不同矢跨比以及不同内弦支结构尺寸的内外双重张弦网壳结构进行数值计算,考察其在罕遇地震作用下的弹塑性动力响应特点.所有模型的网壳杆件均采用非抗震荷载工况满应力优化设计,并满足多遇地震验算.地震波采用两条天然波和由规范反应谱生成的三向人工波.采用非线性时程法对内外双重张弦网壳进行弹塑性地震响应分析.基于计算结果,统计了8度罕遇地震作用下上部网壳塑性区域、塑性发展程度和残余变形的发展特点及其分布规律.研究表明,下部结构形式、支座连接条件以及跨度对内外双重张弦网壳的弹塑性响应最为敏感;地震波对塑性杆件数量和塑性应变大小有一定影响;所有模型均没有在罕遇地震下出现倒塌.Considering the effects of span,initial pretension,layout of the substructure,connection condition of support,rise-span ratio,size of inner string structure and selection of seismic waves,elastic-plastic dynamic responses of double inner and outer latticed shell string structure under rare earthquakes were investigated.The size of member section in the model was determined by the structural full-stress design under non-seismic load cases.Two natural waves and a three-way artificial wave generated from a standardized response spectrum were chosen as applied seismic waves.Nonlinear time-history method was used to analyze elastic-plastic seismic responses of double inner and outer latticed shell string structure.Based on the calculation results,the characteristics of plastic area of the upper latticed shell,the plasticity state,and the residual deformation characteristics and distribution under the 8-degree rare earthquake were studied.The research shows that the span,the substructure form and the connection condition of support are influential to the elastic-plastic responses of double inner and outer latticed shell string structure.Seismic wave has certain influences on the quantity of plastic members and magnitude of plastic strain.Collapses never happen for all models under rare earthquakes.

关 键 词：内外双重张弦网壳 罕遇地震 弹塑性动力响应 性能化抗震设计 

分 类 号：TU393.3[建筑科学—结构工程]