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（1 中國京冶工程技術(shù)有限公司， 北京 100088； 2 萬達(dá)商業(yè)規(guī)劃研究院有限公司， 北京 100022;3 北京東方國興建筑設(shè)計(jì)院有限公司， 北京 100044）
［摘要］某室內(nèi)主題樂園為大型室內(nèi)游樂場，屋蓋設(shè)有高空軌道觀覽車。本工程采用倒三角形立體鋼桁架與鋼筋混凝土框架的混合結(jié)構(gòu)形式，其中屋蓋結(jié)構(gòu)長242-4m，寬55-2～126-3m，主桁架最大跨度85-5m，局部弦桿采用高強(qiáng)度鋼材Q460GJD。主要介紹了屋蓋結(jié)構(gòu)體系、分析設(shè)計(jì)條件、分析設(shè)計(jì)結(jié)果、支座節(jié)點(diǎn)分析與設(shè)計(jì)、屋蓋軌道結(jié)構(gòu)分析與設(shè)計(jì)等。采用MIDAS/Gen軟件對整體結(jié)構(gòu)及支座節(jié)點(diǎn)進(jìn)行了計(jì)算分析，分析結(jié)果表明：各項(xiàng)設(shè)計(jì)指標(biāo)均滿足規(guī)范要求，選用的結(jié)構(gòu)體系及節(jié)點(diǎn)做法簡潔美觀、便于現(xiàn)場施工。
［關(guān)鍵詞］倒三角形立體鋼桁架； 大跨結(jié)構(gòu)； 節(jié)點(diǎn)設(shè)計(jì)； 軌道結(jié)構(gòu)
中圖分類號：TU392-3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)17-0013-05
Steel structural analysis and design of large-span roof of an indoor theme park
Zheng Chunlin1, Wang Hongbin1, Liu Xiangyang2, Zhang Yu1, Ge Wanyu3, Ding Jiyong3
(1 China Jingye Engineering Co., Ltd., Bejing 100088, China; 2 Wanda Commercial Planning & Research Institute Co., Ltd., Beijing 100022, China; 3 Beijing Dongfangguoxing Architectural Design Institute Co., Ltd., Beijing 100044, China)
Abstract:An indoor theme park is a large amusement park which installs high altitude track viewing vehicle. It adopts mixed structural form of inverted triangular spatial steel truss and reinforced concrete frame. The roof structure is 242-4m long and 55-2～126-3m wide. The maximum span of the main truss is 85-5m. High strength steel Q460GJD is used in some chords. The roof structural system, analysis and design conditions, analysis and design results, analysis and design of supporting joint and roof track structure were mainly introduced. Software MIDAS/Gen was used to calculate and analyze the overall structure and supporting joint. The results show that all design indexes meet the codes requirements. The selected structural system and joints design are simple, beautiful and convenient for construction.
Keywords:inverted triangular spatial steel truss; large-span structure; joint design; track structure
作者簡介：鄭春林，碩士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email：chunlinzheng@126.com。
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