(启迪设计集团股份有限公司, 苏州 215021)

摘要: 苏州新湖明珠城商业体天幕钢结构为树状柱支撑网壳结构,屋面网壳形状为自由曲面,采用三角形网格.各分支构件的极限屈曲荷载和树状支撑杆件的计算长度系数采用屈曲分析计算. 对树状柱构件采用二阶直接分析法进行复核,计算结果表明:与计算长度系数法对比,二阶直接分析法所得相应构件的应力比增大,网壳结构宜采用直接分析法设计. 针对结构整体稳定性,进行了线性与非线性全过程整体屈曲分析,同时采用二阶直接分析法考虑双非线性进行对比,以此从多角度了解整体结构屈曲失稳的行为,保证结构有足够的安全储备. 对部分失效分支进行抗连续倒塌分析,提出加强措施,以提高结构的安全性能. 对关键节点进行优化设计,并进行有限元分析,以提高节点连接的可靠性.

关键词: 单层网壳; 树状柱; 直接分析法; 非线性屈曲分析; 抗连续倒塌分析

中图分类号:TU393 文献标志码:A 文章编号:1002⁃848X(2022)07⁃0044⁃07

DOI:10. 19701 / j.jzjg.SZY2102

Design of Suzhou Xinhu Pearl City commercial skycurtain steel structure

WU Chuanchuan, DENG Chunyan, YUAN Xuefen

(Tus⁃Design Group Co., Ltd., Suzhou 215021,China)

Abstract: Suzhou Xinhu Pearl City commercial skycurtain steel structure is a tree⁃shape column supporting reticulted shellstructure. The shape of roof mesh shell is free⁃form surface and triangular mesh is adopted. The ultimate buckling load ofeach branch member and calculated length factor of tree⁃shape members were obtained by using the buckling analysis. Thesecond order direct analysis method was used to check the tree⁃shaped column members. The calculated results show thatthe stress ratio with second order direct analysis method of the corresponding members increases comparing with thecalculated length factor method, the second order direct analysis method should be used to design the reticulated shellstructure. In view of the overall stability of the structure, the whole process of linear and nonlinear global buckling analysiswere carried out, and the second order direct analysis method was adopted to consider the double nonlinear comparison, soas to understand the buckling behavior of the whole structure from multiple angles and ensure that the structure has enoughsafety reserve. The anti⁃continuous collapse analysis of partial branch failure was carried out, and the strengtheningmeasures were put forward to improve the safety performance of the structure. The key nodes were optimized and the finiteelement analysis was carried out to improve the reliability of node connection.

Keywords: single layer reticulated shell; tree⁃shape column; direct analysis method; nonlinear buckling analysis;anti⁃continuous collapse analysis

第一作者:武川川,硕士,高级工程师,主要从事高层建筑、钢结构结构设计研究,Email:chuanchuan.wu@ tusdesign.com.

[引用本文] 武川川,邓春燕,袁雪芬. 苏州新湖明珠城商业体天幕钢结构设计[J]. 建筑结构,2022,52(7):44⁃50.WU Chuanchuan,DENG Chunyan,YUAN Xuefen. Design of Suzhou Xinhu Pearl City commercial skycurtain steel structure[J]. Building Structure,2022,52(7):44⁃50.