施工技术2014年1月下 14CONSTRUCTION TECHNOLOGY第43卷第2期 DOI:10. 7672/sgjs2014020014 月牙形非封闭空间索桁架结构预应力施工技术* 罗斌'，郭正兴'，潘海涛²，杨小飞3 (1.东南大学土木工程学院，江苏南京210096；2.宁波市城建设计研究院有限公司， 浙江宁波315012；3.南京市建筑设计研究院，江苏南京210005） [摘要]乐清体育场挑蓬采用月牙形非封闭空间索桁架结构，由刚性外环梁柱、内环索、上径向索、下径向索、吊索 和压杆构成，属于张力结构体系。
本工程索桁架共38福，各福的悬挑长度和张拉力差异大，在中部索桁架的悬挑 端部存在上、下径向索交叉和上、下环索分叉，其间布置了压杆。
为减少施工支架搭设费用，采用发明专利技术“索 桁架固定千斤顶斜向牵引整体提升的无支架施工方法”，分3个施工阶段：低空无应力组装、空中斜向牵引提升和 高空分级同步张拉。
在施工全过程模拟分析中，由于存在刚体大位移和拉索大悬垂现象，因此采用发明专利技术 “确定索杆系静力平衡状态的非线性动力有限元法”进行分析，确定全过程的结构位形和内力状况。
[关键词】体育场；索桁架；组装；提升；张拉；数值模拟 [中图分类号】TU311[文献标识码]A[文章编号]1002-8498(2014)02-0014-04 Prestressed Construction on Space Cable-truss Structure withCrescentNon-closedPlan Luo Bin',Guo Zhengxing',Pan Haitao²,Yang Xiaofei (1.Civil Engineering College,Southeast Universty,Nanjing，Jiangsu 210096,China; 2.Ningbo Urban Construction Design and Research Institute Co.，Ld.，Ningbo，Zhejang 315012,China; 3.Nanjing Architectural Design and Research Institute Co.，Lad.，Nanjing，Jiangsu 210005,China) Abstract:Cable-truss structure is applied on space cable-truss roof structure with crescent non-closed plan of Yueqing Stadium, which consists of rigid beams and columns, circle cables，radial cables, suspender cables and pression bars.The whole structure includes38cable-trusses，andhalf of them have different overhang length and tensioning force. There exist bifurcations and pression bars between some upperradial cables and lowerradial cablesinthemiddle part ofstructure,andsodocircle cables. In order to decrease the cost of support facility， an inventive patent technology called “non- bracket tow-lifting with fixed jacks construction technology” is applied on this project. There are three stepsof theintegralinstallingmethodnamelyaprocessingfassembling stresslescable-barnground, to tow-lifting and tensioning the whole cable-truss in the air. Inventive patent-technology of “the nonlinearity power finite element method for assuring static equilibrium state of cable-bar” is applied in order to solve the...
