文章摘要
翟永梅,刘瑶,陈贻辉,符徐霞.单层连方型球面网壳与下部支承结构协同工作的强震失效研究[J].地震工程学报,2020,42(2):299-303,310. ZHAI Yongmei,LIU Yao,CHEN Yihui,FU Xuxia.Failure Modes of Single-layer Lamellar Spherical Reticulated Shellsunder Cooperative Work with Lower SupportingStructures and Severe Earthquakes[J].China Earthquake Engineering Journal,2020,42(2):299-303,310.
单层连方型球面网壳与下部支承结构协同工作的强震失效研究
Failure Modes of Single-layer Lamellar Spherical Reticulated Shellsunder Cooperative Work with Lower SupportingStructures and Severe Earthquakes
投稿时间:2017-08-20  
DOI:10.3969/j.issn.1000-0844.2020.02.299
中文关键词: 单层连方型球面网壳;强震作用;整体结构;失效模式
英文关键词: single-layer lamella spherical reticulated shell;severe earthquake;overall structure;failure mode
基金项目:国家自然科学基金面上项目"基于高分辨率遥感影像的城市建筑物震害预测研究"(51178351);"十三五"国家重点研发项目"滨海城市重大基础设施灾变机理、风险评估与监测预警原理与方法"(2016YFC0800209)
作者单位
翟永梅 同济大学上海防灾救灾研究所, 上海 200092 
刘瑶 同济大学土木工程学院, 上海 200092 
陈贻辉 上海中建建筑设计院有限公司, 上海 200122 
符徐霞 同济大学土木工程学院, 上海 200092 
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中文摘要:
      基于ABAQUS有限元分析,研究了单层连方型球面网壳结构在90种工况下的3种失效模式:弱支承结构失效模式、强支承结构失效模式和中等支承结构失效模式。不同失效模式下结构所能承受的极限加速度有较大差别。结构处于弱支承或强支承状态时失效极限荷载较低,处于中等支承时失效荷载较高;在由弱或强支承向中等支承过渡的区间,结构的失效荷载呈现逐渐增加的趋势。当上下部结构刚度比较匹配时,二者才能充分发挥抗震性能,同时结构的极限承载力也会相对较高。下支承柱刚度是影响结构失效模式和极限荷载的主要因素之一,研究结果表明,随着支承刚度的增加,结构极限荷载呈先增加后减小的趋势。随着屋面等效荷载的增加,结构的极限承载力将会降低,在地震中更容易发生破坏。
英文摘要:
      This paper proposes three structural failure models of single-layer lamellar spherical reticulated shells under 90 working conditions based on ABAQUS finite element analysis; these models include the failure modes of weakly supported structures, strongly supported structures, and moderately supported structures. The ultimate acceleration of the structure markedly differs under different failure modes, and the ultimate failure loads of the structure under the failure modes of weak and strong support are low, while that under the failure mode of moderate support is relatively high. The failure load of the structure presents an increasing trend in the interval from weak or strong support to medium support. When the stiffness of the upper and lower structures is matched, the ultimate bearing capacity of the structure is relatively high. The stiffness of the lower supporting columns is one of the main factors affecting the failure modes and ultimate loads of a structure. Increases in supporting stiffness cause the ultimate load of the structure to first increase and then decrease. As the equivalent load of the roof increases, the ultimate bearing capacity of the structure decreased and shows greater potential to be damaged in an earthquake.
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