【摘要】：國家會(huì)展中心是由主展廳及相關(guān)配套建筑組成的特大型會(huì)展綜合體項(xiàng)目。4個(gè)主展廳單體覆蓋面積大,各單體鋼屋蓋平面投影尺寸為297m×350m,為大跨、大懸挑、超長的結(jié)構(gòu)形式。介紹了主展廳鋼屋蓋的結(jié)構(gòu)方案演變過程以及鋼屋蓋的抗風(fēng)設(shè)計(jì)和為降低溫度變化影響所采取的技術(shù)手段。主展廳鋼屋蓋是在綜合考慮建筑功能需要、外觀效果及結(jié)構(gòu)安全可靠和結(jié)構(gòu)經(jīng)濟(jì)性等因素的前提下,經(jīng)過多方案比選,確定采用空間桁架結(jié)構(gòu)體系。通過在屋蓋懸挑部位設(shè)置抗風(fēng)拉桿,有效降低風(fēng)吸作用下桁架懸臂端的變形以及桁架桿件的內(nèi)力。采用橡膠支座可有效解決由于溫度變化在超長鋼結(jié)構(gòu)中產(chǎn)生的過大溫度應(yīng)力的問題。主展廳鋼屋蓋結(jié)構(gòu)選型合理,可實(shí)現(xiàn)結(jié)構(gòu)的安全可靠并具有較好的經(jīng)濟(jì)性。
[Abstract]:The National Convention and Exhibition Center is a super large scale exhibition complex project composed of main exhibition hall and related supporting buildings. The four main exhibition halls have large coverage area, and the projection size of each single steel roof is 297m 脳 350m, which is a large span, large cantilever and super long structure form. This paper introduces the evolution process of the structural scheme of the steel roof of the main exhibition hall, the wind-resistant design of the steel roof and the technical measures to reduce the influence of temperature change. The steel roof of the main exhibition hall is determined to adopt the space truss structure system on the premise of the comprehensive consideration of the building function, the appearance effect, the safety and reliability of the structure and the economic efficiency of the structure, and through the comparison and selection of many schemes, the space truss structure system is adopted. In order to reduce the deformation of the cantilever end of the truss and the internal force of the truss member under the action of the wind suction, the anti-wind pull rod is set in the cantilever part of the roof. Rubber bearing can effectively solve the problem of excessive temperature stress caused by temperature change in super long steel structure. The steel roof structure selection of the main exhibition hall is reasonable, which can realize the safety and reliability of the structure and have better economy.
【作者單位】： 華東建筑設(shè)計(jì)研究總院;清華大學(xué)建筑設(shè)計(jì)研究院;
【分類號】：TU973.13

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