- 摘 要
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（1 浙江省建筑設計研究院， 杭州 310006； 2 浙江同濟科技職業(yè)學院， 杭州 311231）
［摘要］某醫(yī)院行政樓項目建筑高度約60m，為大跨度大懸挑鋼桁架轉(zhuǎn)換高層建筑結構。主體結構采用鋼-混凝土混合結構體系，底部兩側設置剪力墻底座并延至屋頂，4～5層為雙層雙向桁架轉(zhuǎn)換結構，最大邊跨桁架跨度58-8m，最大懸挑16-8m。剪力墻作為主要抗側力體系可有效抵抗地震作用和風等水平荷載，雙層雙向桁架轉(zhuǎn)換體系則作為上部結構的支撐轉(zhuǎn)換結構。主要研究了該建筑的結構體系及特點、結構構件的性能目標、整體指標的控制、轉(zhuǎn)換桁架的受力分析、彈性時程分析以及主要抗震構造措施。結果表明：雙層雙向轉(zhuǎn)換桁架結構有效實現(xiàn)了大跨度大懸挑的結構轉(zhuǎn)換及上部結構支撐，具有良好的受力性能。
［關鍵詞］轉(zhuǎn)換桁架； 鋼結構； 大跨度大懸挑； 節(jié)點分析； 性能化設計
中圖分類號：TU323-4文獻標識碼：A文章編號：1002-848X(2020)03-0013-07
Structural system design on the transition truss located at a higher level for the administration building of a hospital
Wang Zhen1, Yang Xuelin1, Lin Keyao1, Pang Chongan2, Feng Yongwei1
(1 Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China;2 Zhejiang Tongji Vocational College of Science and Technology, Hangzhou 311231, China)
Abstract:The administration building of a hospital is a large-span and large-cantilever steel truss transfer high-rise building with a construction height of about 60m. The main structure adopts the steel-concrete composite structural system. The bases of shear wall are set at both sides of the bottom and extend to the roof. The 4th to 5th floors are double-layer two-way truss transfer structure, with the maximum side span truss span of 58-8m and the maximum cantilever of 16-8m. As the main lateral force resisting system, shear wall can effectively resist horizontal loads such as earthquake action and wind load, while double-layer two-way truss transfer system is the supporting transfer structure for the superstructure. The structural system and its characteristics of the building, the performance objectives of the structural members, the control of the overall indicators, the mechanical analysis of the transfer truss, the elastic time-history analysis and the main seismic structural measures were studied. The results show that the double-layer two-way transfer truss structure effectively realizes the structural transfer of large-span and large-cantilever structure and the upper structure supporting, and has good mechanical performance.
Keywords:transfer truss; steel structure; large-span and large-cantilever; joint analysis; performance-based design
*浙江省建設科研項目(2015K11)，浙江省水利廳重點科技項目(RB1909)，杭州市下城區(qū)258人才資助經(jīng)費（下人社發(fā)［2018］31號）。
作者簡介：王震，博士，高級工程師，Email: wzjggc@163.com。
