- 摘 要
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黃季陽1，聶悅2，王樹1，張國軍1，葛家琪1，沈斌3（1 中國航空規(guī)劃建設發(fā)展有限公司，北京 100120； 2 北京市海淀區(qū)住房和城鄉(xiāng)建設委員會，北京 100083； 3 北京市建筑工程研究院，北京 100039）
［摘要］中關(guān)村國家自主創(chuàng)新展示中心采用折線形預應力大跨度空間桁架鋼結(jié)構(gòu)體系，該預應力體系在同類鋼結(jié)構(gòu)工程中應用很少，因此結(jié)構(gòu)預應力體系選型及施工方法模擬分析對工程的安全性和可靠性具有重要的意義。采用不同計算模型，選取拉索布置形式、預應力度、桁架高跨比等幾種主要參數(shù)，進行結(jié)構(gòu)體系布局研究，總結(jié)預應力體系選型關(guān)鍵參數(shù)的合理取值范圍；對相同承載力控制指標下預應力體系與非預應力體系進行了靜力分析及靜力彈塑性全過程分析，確認了預應力體系的有效性；應用單元生死法對結(jié)構(gòu)預應力施工進行全過程模擬計算，分析了不同支撐安裝方式對結(jié)構(gòu)最終力學性能的影響，確定了合理的施工方案；同時進行了折線形轉(zhuǎn)換節(jié)點的預應力損失分析及摩阻試驗，通過對比位移、索力等關(guān)鍵參數(shù)的施工監(jiān)測數(shù)據(jù)與理論計算值，驗證了結(jié)構(gòu)設計的安全性。
［關(guān)鍵詞］折線形預應力體系；靜力彈塑性；單元生死法；施工模擬
中圖分類號：TU391-3文獻標識碼：A文章編號：1002-848X(2012)01-0049-06
Design and research on a prestressed steel truss structure with broken line form cable in exhibition center of National Innovation of Zhongguancun
Huang Jiyang1, Nie Yue2, Wang Shu1, Zhang Guojun1, Ge Jiaqi1, Shen Bin3（1 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China；2 Beijing Haidian District Municipal Commisson of Housing and UrbanRural Development, Beijing 100083, China；3 Beijing Building Construction Research Institute, Beijing 100039, China）
Abstract:A large-span space truss structure with broken line form prestressed cable is used in exhibition center of National Innovation of Zhongguancun. The prestressed system is seldom used in similar steel structure engineering, therefore the selection of prestressed structure system and simulation analysis of construction method have vital significance on the safety and reliability of the project. Different calculation models were adopted and several main parameters, such as layout forms of cables, prestressed degree, height-span ratio of truss were selected to research the distribution of structure system and summarize the reasonable selection of the key parameters of prestressed system. Under the same control index of bearing capacity, the performance of the static and static elastic-plastic of prestressed system and non-prestressed system were analyzed to confirme the effectiveness of prestressed system. The method of killing or activating element was applied to simulate and calculate the whole process of prestressed construction of structure. The influence on the final mechanical properties of the different support installation ways was analyzed and the reasonable construction plan was determined. The analysis of prestress loss of broken line form transfer joint and the friction resistance test were also done. By comparing the key parameters, such as displacement, cable force and so on between construction monitoring data and theoretical calculations, the security of the structural design was verified.
Keywords:broken line form prestressed system; static elastic-plastic; killing or activating element method; construction simulation
作者簡介：黃季陽，碩士，工程師，Email:hibye_5d@163.com。
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