(1 中南建筑设计院股份有限公司， 武汉 430071；2 北京工业大学空间结构研究中心， 北京 100124；3 烟台大学土木工程学院， 烟台 264005)

摘要: 针对温州某体育馆圆柱面弦支穹顶屋盖结构的索系选型，建立了 Levy 型索系方案和无环索型索系方案。探讨了两种方案的建筑美感，比较了两种方案的经济指标。 采用 MIDAS Gen 软件建立模型分析结构在静力荷载作用下的杆件内力、节点位移和上部网壳应力，探讨了两种方案的结构刚度和索力分布特点。 采用弧长法进行荷载￣位移全过程分析，探讨了两种方案的静力承载力和破坏模式。 基于拆除构件法分析了结构断索后的响应，探讨了两种方案的抗连续倒塌性能。 结果表明:无环索方案在经济指标方面优于 Levy 型方案；两种方案的静力破坏模式均为强度破坏，但无环索方案的承载力较大。 无环索方案的结构刚度更大、索力较低且每层索力分布均匀，上部网壳应力更小；两种方案在断索后均未发生连续倒塌，Levy 型方案在环索局部破断后结构刚度下降较大，索力损失较多，无环索方案发生内力重分布且索力损失不明显，抗连续倒塌性能好于 Levy 型方案。

关键词: 大跨空间结构；弦支穹顶结构；圆柱面弦支穹顶结构；无环索弦支穹顶结构；拆除构件法

中图分类号:TU398. 7 文献标志码:A 文章编号:1002￣848X(2022)01￣0041￣08

DOI:10. 19701 / j. jzjg. 20211056

Comparative study on the performance of Levy type and loop￣free type cable￣strut system ofcylindrical suspen￣dome

LI Hongsheng1， XUE Suduo2， WU Yifeng1， LIU Renjie3， LI Xiongyan2， FU Li1

(1 Central￣South Architectural Design Institute Co.， Ltd.， Wuhan 430071， China；2 Spatial Structures Research Center， BeijingUniversity of Technology， Beijing 100124， China；3 College of Civil Engineering， Yantai University， Yantai 264005， China)

Abstract: Aiming at designing the cable￣strut system of the cylindrical suspen￣dome roof structure in a gymnasium inWenzhou， a Levy type scheme and a loop￣free type cable￣strut scheme were proposed. The architectural beauty of the twoschemes was discussed. The economic indicators were compared. The MIDAS Gen software was used to establish a model toanalyze the component internal force， joint displacement and stress of upper reticulated shell under the static load actions，and the structure stiffness and cable force distribution characteristics were discussed. The load￣displacement analysis wascarried out by the arc length method， and the static bearing capacity and failure mode of the two schemes were discussed.Based on the dismantling component method， the response of the structure after cable breaking was analyzed， and theprogressive collapse resistance was discussed. The results show that the loop￣free type scheme is better than the Lery typescheme in terms of the economic factors. The static failure modes of the two schemes are both strength failure. The carryingcapacity of the loop￣free type scheme is relatively larger. The loop￣free type scheme has greater structural rigidity， lowercable forces and uniform cable force distribution in each layer， and its stress of upper reticulated shell is smaller. There isno progressive collapse in two schemes after the cable breaking. The Levy type scheme has a significant reduction instructural rigidity after the loop cable is partially broken， and has cable force loss. The internal force of the loop￣free typestructure is redistributed and the loss of cable force is not obvious， and it has better progressive collapse resistanceperformance than Levy type scheme.

Keywords:large￣span spatial structure；suspen￣dome structure；cylindrical suspen￣dome structure；loop￣free type suspen￣dome structure；dimantling component method

∗山东省自然科学基金青年项目(ZR201911030049)，国家自然科学基金面上项目(51778017)。

第一作者:李宏胜，学士，教授级高级工程师，主要从事建筑结构设计，Email:79211959@ qq. com。

[引用本文] 李宏胜，薛素铎，吴逸枫，等. 圆柱面弦支穹顶 Levy 型与无环索型索系性能对比研究[J]. 建筑结构，2022，52(1):41￣48，69. LI Hongsheng，XUE Suduo，WU Yifeng，et al. Comparative study on the performance of Levy typeand loop￣free type cable￣strut system of cylindrical suspen￣dome[J]. Building Structure， 2022， 52(1):41￣48，69.