(1 重庆大学土木工程学院，重庆 400045； 2 中国建筑西南设计研究院，成都 610081)
［摘要］通过对一倒圆角三角形弦支穹顶结构4种预应力方案的静力分析，比较了不同的预应力设置方案下结构的最大竖向位移、上部网壳构件的最大轴力和支座径向位移。在此基础上提出了进一步提高此类结构受力性能指标的综合优化方案。分析结果表明：在选择预应力优化方案时为防止结构变形和预应力损失的影响，需要对结构进行形态分析；最优的预应力方案是在几何法和刚性索法的基础上得出的，预应力方案的选择需要基于结构的各项性能指标来综合判断。
［关键词］倒圆角三角形弦支穹顶；形态分析；张力补偿法；几何法；刚性索法
Prestress optimization of chamfering triangle suspen-dome structure
Yang Bo1, Dai Guoxin1, Nie Shidong1, Wang Liwei2, Yang Wen2, Yang Xi2(1 College of Civil Engineering, Chongqing University, Chongqing 400045, China;2 China Southwest Architectural Design and Research Institute, Chengdu 610081, China)
Abstract:Based on the static analysis of four prestress methods for the same chamfering triangle suspen-dome structure, the internal force of the member, joint displacement and the support horizontally radial dispalcement were compared. In addition, the compositive prestress optimization, which could increase the load-capability dramatically, was proposed. The analysis results indicate that in order to prevent the deformation of structure and reduce the influence of prestress loss, it is necessary to conduct the structural shape analysis when selecting the prestress optimization method. The optimization of prestress method is found based on the geometry method and rigid cable method, therefore the selection of prestress method should be judged according to the different structural performance and response.
Keywords:chamfering triangle suspen-dome structure; shape analysis; tension compensation method; geometry method; rigid cable method
作者简介：杨波，博士研究生，Email:YANG0206@ntu.edu.sg。
参考文献
［1］郭云. 弦支穹顶结构形态分析、动力性能及静动力试验研究［D］. 天津：天津大学，2003.
［2］张晓峰. 奥运羽毛球馆弦支穹顶结构整体稳定及动力性能研究［D］. 北京：北京工业大学，2008.
［3］黄冬明. 弦支穹顶施工过程中预应力优化设计与试验研究［D］. 北京：北京工业大学，2007.