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(中國(guó)建筑設(shè)計(jì)研究院  北京 100044)
【提要】  唐山市國(guó)際會(huì)展中心展廳采用混凝土巨型框架結(jié)構(gòu)體系,巨型柱為現(xiàn)澆鋼筋混凝土框架形成的筒體,大跨度梁采用現(xiàn)澆混凝土箱形截面。采用后張預(yù)應(yīng)力技術(shù),結(jié)合后澆帶設(shè)置與預(yù)應(yīng)力筋連接器,實(shí)現(xiàn)了雙向大跨度結(jié)構(gòu)、超長(zhǎng)預(yù)應(yīng)力筋的分段多次張拉。在設(shè)計(jì)中還提出了確定超長(zhǎng)混凝土樓板在施工階段和使用階段中的應(yīng)力與預(yù)應(yīng)力值的數(shù)值計(jì)算方法。
【關(guān)鍵詞】  巨型框架  大跨度  超長(zhǎng)結(jié)構(gòu)  預(yù)應(yīng)力  混凝土收縮應(yīng)力
Superlength Largespan Prestressed RC Structure of Tangshan International Convention & Exhibition Center/Fan Zhong, Wang Daqing, Tang Jie, You Tianzhi, Bi Lei, Wang Chunguang(China Architecture Design & Research Group, Beijing 100044,China)
Abstract:The megaframe concrete structural system is adopted for the main exhibition hall of Tangshan International Convention & Exhibition Center. The huge columns consist of casein site RC frametube and the largespan beams are made by RC boxsections. Using post tension technique and combining postcast band and prestressed tendon connectors, multisection tension is realized for the twoway large span RC structure. Numerical method for calculating stress and prestressed for superlength RC slabs in both construction and usage is also presented.
Keywords:megaframe；largespan； superlength structure；pre－stressed； shrinkage