（苏州科技学院土木工程系，215011）

［提要］苏州高等教育园主入口钢结构预应力拉索拱是教育园的标志性建筑。结构建筑造型复杂，体量较大，结构采用了空间管桁架形式。讨论了结构计算和设计中的主要问题，包括杆件设计、节点设计和抗震分析等。分析结果表明，此类管桁架结构按桁架模型和刚架模型计算结果整体上差别不大，但局部杆件可能需要考虑次弯矩的不利影响；预应力的大小影响拉索拱的模态和自振周期；拉索预应力的取值要综合考虑结构的整体反应、变形要求和经济性等因素。

［关键词］拉索拱；管桁架；结构设计；抗震分析

Design and Analysis of Prestressed Steel Arch of Suzhou Higher Education Town/Mao Xiaoyong, Gu Qiang, Yu Anlin, Tang Xingrong, He Ruoquan, Gao Xiaoying（Department of Civil Engineering, Suzhou Institute of Technology, Suzhou 215011, China)

Abstract:The prestressed steel arch of Suzhou Higher Education Town is a symbolic structure located at the gate of the town. The whole structure is large and complicated according to the conceptual design of architecture, and space tube truss structure was used. Main problems of analysis and design including member and joint design and seismic behavior etc. have been introduced. From analytical results, it is found that there is little difference between the result of truss model and beam model except discrete structure members. Prestress effected the basic natural vibration period and modal of the structure. During determining the initial prestress of the steel cable, such matters as the whole response of the structure, the deformation limit and economical efficiency etc. must be considered.  

Keywords:arch with steel prestressed cables; space tube truss structure; structure design; seismic analysis