顶部斜拉式跨河道多层钢框架施工技术及模拟分析  

Construction Technology and Simulation Analysis of a Top-cable-stayed River-crossing Multi-layer Steel Frame

作　　者：曲扬 刘书冬 谢波[1] 邱健 王文晋[1] 程建军[1] QU Yang;LIU Shudong;XIE Bo;QIU Jian;WANG Wenjin;CHENG Jianjun(The Third Construction Co.,Ltd.of China Construction Eighth Engineering Division,Nanjing,Jiangsu210046,China)

机构地区：[1]中建八局第三建设有限公司,江苏南京210046

出　　处：《施工技术（中英文）》2022年第14期68-71,共4页Construction Technology

基　　金：国家自然科学基金(51078289)。

摘　　要：西交利物浦大学太仓校区整体呈环形分布,采用顶部斜拉式大跨度多层钢框架结构跨河道连接教学楼。跨河连接体钢结构体系新颖、传力路径复杂,提出中心扩展法施工工艺,即先吊装主体核心钢结构再逐层扩展安装悬挑钢构件,而后张拉顶部斜拉索,最后将关键节点铰接变为刚接。采用MIDAS,ANSYS Workbench对施工过程进行模拟分析,并对在施结构进行健康监测和评估。结果表明,施工阶段构件应力比控制在0.5以内,具有富足的施工安全储备,斜拉索采用5级对称张拉可在卸载后达到设计索力。The Taicang campus of Xi’an Jiaotong-Liverpool University has a circular overall shape and a top-cable-stayed river-crossing multi-layer steel frame is adopted to connect the buildings.Featured with novel system and complex mechanics path,the river-crossing steel structure was constructed in a certain order,which called the central extension method.Firstly,the main steel members were hoisted,then the top cables were stretched layer by layer,finally the connections of key joints were transformed from hinge to rigid.The construction process was simulated and analyzed via MIDAS and ANSYS Workbench,and the health monitoring and assessment of the structure under construction were conducted.The result shows that the stress ratios of members are below 0.5 in overall with favorable safety redundancy.The force of top cables reaches the design value when the cables are stretched symmetrically five times before unloading.

关 键 词：钢结构 斜拉索 模拟分析 健康监测 中心扩展法 

分 类 号：TU745.2[建筑科学—建筑技术科学]