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（蘇州科技學(xué)院土木工程系，215011）

［提要］蘇州高等教育園主入口鋼結(jié)構(gòu)預(yù)應(yīng)力拉索拱是教育園的標(biāo)志性建筑。結(jié)構(gòu)建筑造型復(fù)雜，體量較大，結(jié)構(gòu)采用了空間管桁架形式。討論了結(jié)構(gòu)計(jì)算和設(shè)計(jì)中的主要問(wèn)題，包括桿件設(shè)計(jì)、節(jié)點(diǎn)設(shè)計(jì)和抗震分析等。分析結(jié)果表明，此類(lèi)管桁架結(jié)構(gòu)按桁架模型和剛架模型計(jì)算結(jié)果整體上差別不大，但局部桿件可能需要考慮次彎矩的不利影響；預(yù)應(yīng)力的大小影響拉索拱的模態(tài)和自振周期；拉索預(yù)應(yīng)力的取值要綜合考慮結(jié)構(gòu)的整體反應(yīng)、變形要求和經(jīng)濟(jì)性等因素。

［關(guān)鍵詞］拉索拱；管桁架；結(jié)構(gòu)設(shè)計(jì)；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