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葉小剛 樓文娟 陳 勇 （浙江大學(xué)建筑工程學(xué)院 杭州 310027）秦從律 裘濤 （浙江大學(xué)建筑設(shè)計研究院 杭州 310027）肖建寶 （浙江省電力公司 杭州 310007）
[提要] 浙江省電力調(diào)度大樓門廳采用大跨高位鋼桁架轉(zhuǎn)換層結(jié)構(gòu)。為消除施工荷載及溫度對鋼桁架周邊結(jié)構(gòu)的影響，施工過程分兩階段進(jìn)行：第一階段大跨鋼桁架端部混凝土未澆注，鋼桁架支座處于可滑動鉸支狀態(tài)；第二階段，待上部結(jié)構(gòu)封頂后，再將鋼桁架端部實行固支。對該鋼桁架轉(zhuǎn)換層第一階段施工全過程的結(jié)構(gòu)應(yīng)力、位移進(jìn)行現(xiàn)場試驗研究，并將現(xiàn)場實測數(shù)據(jù)與縮尺模型試驗結(jié)果進(jìn)行對比。結(jié)果表明：第一施工階段鋼桁架撓度及應(yīng)力實測值與模型試驗值較接近，在溫度和施工荷載作用下鋼桁架端部產(chǎn)生了一定的水平位移，但其值遠(yuǎn)小于理想可動鉸支模型的計算結(jié)果。
[關(guān)鍵詞] 鋼桁架轉(zhuǎn)換層 施工階段 現(xiàn)場實測Field Measurement and Analysis of Long Span High-level Steel Truss Transffr Story StructlreYe Xiaogang, Lou Wenjuan, Chen Yong ( College of Civil Engineering and Architecture, Zhejiang Univcrsity, Hangzhou 310027,China )Qin CongLu, Pei Tao ( Architectural Design and Research Institute, Zhejiang University, Hangzhou 310027, China)Xiao Jianbao ( Zhejiang Electric Power Company, Hangzhou 310007, China)Abstract: High-level long span steel truss transfer stoy structure was adopted in the hall of Zhejiang electric power attempter building.To avoid the influence of constructing loads and temperature to the surrounding structure of the steel truss, the constructing process was divided into two stages. In the first stage, the concrete to the end of the transfer steel truss was not cast yet and the support of the truss can be referred to a moveable hinged support. After the upper stories were finished, the end of the steel truss was fixed. The stress and displacement of the first oonstructing stage are analyzed and compared with the model experimental results. It is shown that the test results of the deflection and the stress are close to the model experiment values.The temperature and the constructing loads from the upper stories may cause the horizontal displacement at the end of the steel truss, and the horizontal displacement is far less than the computed result of the moveable hinged support model.
Keywords: steel truss; transfer story; constructicn process; field measurement
