基于抗震韧性指标的单层球面网壳施工期抗倒塌性能评价与优化  

Assessment and optimization of collapse resistance for single-layer spherical reticulated shell during construction based on seismic resilience index

作　　者：赵隽妍 张天龙 周宇伟 Zhao Junyan;Zhang Tianong;Zhou Yuwei(School of Civil Engineering and Architecture,Hainan University,Haikou 570228,China)

机构地区：[1]海南大学土木建筑工程学院,海南海口570228

出　　处：《海南大学学报（自然科学版）》2023年第4期414-421,共8页Natural Science Journal of Hainan University

基　　金：海南省自然科学基金(520QN232);国家自然科学基金(51968020)。

摘　　要：为评价施工期未合拢、非完整的单层球面网壳结构抗倒塌性能,本文提出了考虑施工全过程的网壳结构安全功能曲线,建立了基于抗震韧性指标的网壳施工期抗倒塌性能评价方法,并以跨度40m的K8型单层球面网壳结构为例,开展了不同施工方案下结构的抗倒塌性能评价与优化分析.分析结果表明:不同施工阶段下非完整单层球面网壳抗倒塌性能不同,非完整网壳抗倒塌性能评价须考虑施工全过程的影响.通过计算网壳施工全过程的抗震韧性指标,有效判别了网壳抗倒塌性能的最不利施工阶段为第14施工步骤.通过对韧性指标较低的施工步进行拼装方案优化,优化后最不利施工阶段的损伤杆件数量减少了29.32%,韧性值提高了18.12%,有效提高了网壳施工全过程的抗倒塌性能.In the report,in order to evaluate the collapse resistance capacity of an incomplete and unclosed sin-gle-layer spherical reticulated shell during construction,the seismic resilience curve for the whole process con-struction of reticulated shell was proposed,and the seismic resilience evaluation method for the whole process of single-layer spherical reticulated shell structure construction was established by improving the structural safety recovery function of the reticulated shell.The Kiewitt-8 single-layer spherical reticulated shell with a span of 40 m was used as an example to perform the assessment and optimization of collapse resistance under the different construction schemes.The results showed that the collapse resistance capacity of the incomplete single-layer spherical reticulated shell structure under different construction stages is different;it is necessary for the evalua-tion of the collapse resistance capacity of the incomplete spherical reticulated shell that the effects during the whole construction process should be taken into accounts.The seismic toughness index was calculated,and the data suggested that the worse construction stage for the collapse resistance capacity was the fourth stage.The op-timization of the schemes with the lower toughness index was performed,and the data suggested that the number of the damaged poles during the worse construction stage for the collapse resistance capacity decrease by 29.32%,the toughness index increase by 18.12%,which improve the collapse resistance capacity significantly.

关 键 词：单层球面网壳 抗倒塌性能 施工期 抗震韧性指标 

分 类 号：TU443[建筑科学—岩土工程]