馬拉維國(guó)家體育場(chǎng)結(jié)構(gòu)設(shè)計(jì)
韓玲1，卜龍瑰1，張春濃2，徐斌1，朱忠義1
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（1 北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045； 2 萬達(dá)文化旅游規(guī)劃研究院， 北京 100000）
［摘要］馬拉維國(guó)家體育場(chǎng)結(jié)構(gòu)分為看臺(tái)和鋼結(jié)構(gòu)屋蓋兩部分。看臺(tái)屬于超長(zhǎng)結(jié)構(gòu)，采用鋼筋混凝土框架結(jié)構(gòu)體系；鋼結(jié)構(gòu)屋蓋采用立體拱桁架+聯(lián)系桁架結(jié)構(gòu)體系。鋼結(jié)構(gòu)屋蓋拱腳支墩采用重力式天然基礎(chǔ)，并配合預(yù)應(yīng)力鋼絲束與看臺(tái)底板拉結(jié)，通過基礎(chǔ)底部的摩擦力、支墩背部的被動(dòng)土壓力以及預(yù)應(yīng)力鋼絲束拉力共同抵抗鋼結(jié)構(gòu)屋蓋內(nèi)外拱的水平推力，其中支墩背部的被動(dòng)土壓力作為結(jié)構(gòu)安全貯備。通過合理設(shè)計(jì)鋼結(jié)構(gòu)屋蓋拱腳支墩的平面形狀使鋼結(jié)構(gòu)屋蓋內(nèi)外拱的拱腳水平推力與基礎(chǔ)底板拉力的合力點(diǎn)位于墩臺(tái)的形心位置，從而使拱腳基礎(chǔ)反力均勻布置。對(duì)鋼結(jié)構(gòu)屋蓋進(jìn)行了恒載+滿跨活載工況和恒載+半跨活載工況下的穩(wěn)定性分析，對(duì)關(guān)鍵節(jié)點(diǎn)進(jìn)行了精細(xì)化有限元分析。結(jié)果表明，鋼結(jié)構(gòu)屋蓋的整體穩(wěn)定性和節(jié)點(diǎn)承載力均滿足設(shè)計(jì)要求。［關(guān)鍵詞］拱腳基礎(chǔ); 超長(zhǎng)結(jié)構(gòu); 大跨度; 立體拱桁架; 整體穩(wěn)定中圖分類號(hào)：TU318， TU393.3 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)18-0075-07
Structural design of Malawi National StadiumHan Ling1, Bu Longgui1, Zhang Chunnong2, Xu Bin1, Zhu Zhongyi1(1 Beijing Institute of Architectural Design, Beijing 100045, China; 2 Wanda Cultural Tourism Planning & Research Institute, Beijing 100000, China)Abstract: Malawi National Stadium is divided into stand and steel structure roof. The stand is a super-long reinforced concrete frame structure. The upper steel structure roof adopts three-dimensional arch truss and connecting truss structure. Steel structure roof arch foot buttress adopts the gravity type natural foundation, and it is pulled together with stand floor by prestressed steel tendons. The horizontal thrusts of inner and outer arches for steel roof structure are resisted by friction at the foundation base, passive earth pressure of the buttress back, and prestressed steel tendons. The passive earth pressure of the buttress back is taken as structure security reserve. Through reasonable design of the plane shape of the arch foot buttress of steel structure roof, horizontal thrusts of the roof arch foot of inner and outer arches and foundation base tension had the resultant force point located at the centroid position of the buttress, so that the base reaction force of arch foot was uniformly distributed. The stability analysis of the steel structure roof was carried out under the working condition of gravity load and full live load, and gravity load and half live load. Fine finite element analyses of key nodes were carried out. The results show that the overall stability and the nodes bearing capacity of the steel structure roof can meet the design requirements.Keywords: arch foot foundation; super-long structure; large-span; three-dimensional arch truss; overall stability
作者簡(jiǎn)介：韓玲，高級(jí)工程師，Email: hanl_2823@biad.com.cn。
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