- 摘 要
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(1上海原構(gòu)設(shè)計咨詢有限公司， 上海 200233； 2 中國建筑上海設(shè)計研究院有限公司， 上海 200062)
［摘要］固原體育場整體為單側(cè)橢圓形，立面為馬鞍形，長軸方向長約為240m，短軸方向長約為45m，下部為局部4層混凝土框架結(jié)構(gòu)，上部結(jié)構(gòu)采用桅桿柱懸臂桁架結(jié)構(gòu)。分別對罩棚懸挑桁架的結(jié)構(gòu)選型、斜拉索角度等進(jìn)行探討，確定其合理的結(jié)構(gòu)布置形式及結(jié)構(gòu)相關(guān)參數(shù)。對屋蓋進(jìn)行風(fēng)洞試驗數(shù)值模擬分析，給出本項目最不利風(fēng)向下的風(fēng)荷載體型系數(shù)和風(fēng)振響應(yīng)因子。針對本項目結(jié)構(gòu)超長的特點，對結(jié)構(gòu)整體進(jìn)行超長結(jié)構(gòu)應(yīng)力分析和設(shè)計。采用SAP2000軟件對在不同荷載組合作用下考慮拉索單元非線性影響進(jìn)行結(jié)構(gòu)整體抗震分析、懸挑桁架撓度及應(yīng)力、屋蓋整體穩(wěn)定性及關(guān)鍵節(jié)點應(yīng)力分析。分析結(jié)果表明：1.0恒載+1.0風(fēng)吸和1.0恒載+1.0風(fēng)壓+0.7雪載工況為位移控制工況； 豎向地震組合工況并非桿件應(yīng)力控制工況，風(fēng)荷載工況為桿件應(yīng)力主控工況。屋蓋整體穩(wěn)定性分析表明：桁架的屈曲穩(wěn)定系數(shù)大于5.0，結(jié)構(gòu)整體穩(wěn)定性能良好。關(guān)鍵節(jié)點應(yīng)力分析結(jié)果表明：桿件應(yīng)力均低于材料的設(shè)計應(yīng)力值，滿足規(guī)范要求。研究成果可對桅桿柱斜拉懸臂桁架罩棚結(jié)構(gòu)設(shè)計提供借鑒。
［關(guān)鍵詞］固原體育場； 懸挑鋼桁架； 桅桿柱； 拉索； 超長混凝土結(jié)構(gòu)； 溫度應(yīng)力； 風(fēng)洞試驗數(shù)值模擬； 抗震分析
中圖分類號：TU398-7文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)23-0001-07
Structural design of Guyuan Stadium
WANG Xiaohui1, ZHAO Yanlu2
(1 Yuangou Architects & Consultants, Shanghai 200233, China;2 China Architecture Shanghai Design Research Institute Co., Ltd., Shanghai 200062, China)
Abstract:Guyuan Stadium is a single-sided ellipse with a saddle-shaped fa-ade, the length of its long axis is about 240m and the length of its short axis is about 45m, and the lower part of it is a partial 4-story concrete frame structure and the upper structure adopts the mast column cable-stayed cantilever truss structure. The selection of the cantilevered truss structure of the canopy and the angle of the stay cables were discussed, and its reasonable structure layout and structural related parameters were determined. The wind tunnel test numerical simulation analysis of the roof was carried out and the wind load shape coefficient and wind vibration response factor under the most unfavorable wind direction for this project were given. In view of the super-long structure of this project, the stress analysis of super-long structure and design were carried out for the whole structure. The overall seismic analysis of the structure, the deflection and stress of the cantilever truss, the overall stability of the roof and the stress analysis of key joints were mainly done by using SAP2000 considering the nonlinear effects of cable elements under different load combinations. The analysis results show that 1.0 dead load+1.0 wind suction and 1.0 dead load+1.0 wind pressure+0.7 snow load conditions are displacement control conditions; vertical seismic combined conditions are not stress control conditions of members, and the wind load conditions are stress control conditions of members. The overall stability analysis of the roof shows that the buckling stability coefficient of the truss is greater than 5.0, and the overall stability of the structure is favorable. The stress analysis results of key joints show that the stresses of the members are lower than the design stress values of the materials, which meets the specification requirements. The research results can provide reference for the canopy structural design of the mast column cable-stayed cantilever truss.
Keywords:Guyuan Stadium; cantilever steel truss; mast column; cable; super-long concrete structure; temperature stress; wind tunnel test numerical simulation; seismic analysis.
作者簡介：王曉輝，碩士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email:wangxh@yuangou.design。
