- 摘 要
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(北京市建筑設(shè)計研究院 100045)
【提要】 新中國國際展覽中心主登錄大廳屋蓋結(jié)構(gòu)方案采用了兩撐桿張弦梁結(jié)構(gòu)體系。介紹了屋蓋的結(jié)構(gòu)布置,對兩撐桿張弦梁進行了穩(wěn)定分析和整體計算分析,分析表明兩撐桿張弦梁滿足強度、剛度的要求。討論了兩撐桿張弦梁與普通張弦梁的差異、預(yù)拉力的確定、高跨比的影響和結(jié)構(gòu)的抗風(fēng)設(shè)計等問題。針對兩撐桿張弦梁撐桿間距較遠的特點,給出應(yīng)用該類結(jié)構(gòu)的一些建議。
【關(guān)鍵詞】 撐桿 張弦梁結(jié)構(gòu) 初始預(yù)拉力 高跨比 抗風(fēng)設(shè)計
Structural Analysis of Two Braced Bars Beam String Structure Roof in Main Entry Hall of New China International Exhibition Center/Huang Guohui,Wang Zhigang(Beijing Institute of Architectural Design,Beijing 100045,China)
Abstract:Two braced bars beam string roof structure (BSS) is used in main entry hall of New China International Exhibition Center.The design of the roof is introduced.The stability analysis and integral calculation analysis are performed for the two braced bars BSS.The results show that the two braced bas BSS can meet the demand of strength and stiffness.Some problems such as difference between two braced bas BSS and general BSS,confirmation of pretensioning force,influence of heighttospan ratio and design of wind resistance are analyzed and discussed.Suggestions are given for the application of this structure according to larger space between two braced bars.
Keywords:braced bar;beam string structure;initial tensile force;heightspan ratio; wind resistance design