新型预应力组合钢桁架的有限元参数化分析  

Finite Element Parametric Analysis of New Type Prestressed Steel Truss

作　　者：程先春[1] 蔡小宁[2] 郭江培 周斌 CHENG Xian-chun CAI Xiao-ning GUO Jiang-pei ZHOU Bin(Jiangsu Posts ＆ Telecommunications Planning and Designing Institute Co., Ltd, Nanjing Jiangsu 210006 China School of Civil Engineering, Huaihai Institute of Technology,Lianyungang Jiangsu 222005 China Jiangsu Lianheng Institute of Architectural Design Co., Ltd, Changzhou Jiangsu 213000 China)

机构地区：[1]江苏省邮电规划设计院有限责任公司,江苏南京210006 [2]淮海工学院土木工程学院,江苏连云港222005 [3]江苏联恒建筑设计有限公司,江苏常州213000

出　　处：《江苏建筑》2017年第4期29-32,共4页Jiangsu Construction

基　　金：江苏省自然科学基金(BK20130408);江苏省高校自然科学研究项目(15KJB560001)

摘　　要：连云港市某高层建筑结构,由于跨度较大,荷载较大,因此在长跨方向的主梁采用新型预应力钢桁架结构。预应力钢桁架结构上弦为组合梁,主梁跨度方向在下弦圆钢管内布置直线预应力筋,采用SAP2000对其中1榀钢桁架进行有限元参数化分析,研究腹杆截面、混凝土板厚度、预应力筋根数、预应力筋张拉控制应力以及桁架高度的变化对承载力和变形的影响,所得结论可供设计参考。This project is a high-rise building structure of Lianyungang City. Because the span is large and the load is bigger, the long span main beam adopts the new prestressed steel truss structure. The prestressed steel truss structure is the composite beam and the span of the main beam is arranged in the lower chord round steel tube. A finite element parametric analysis of the steel trusses is carried out by SAP2000. The influence of the cross section of the truss, the thickness of the concrete slab, the number of stress tendons, the tension stress of prestressing tendon and the truss height on the bearing capacity and deformation is analysised. The conclusions can be used as reference for design.

关 键 词：预应力 钢桁架 承载力 变形 设计参数 

分 类 号：TU378.6[建筑科学—结构工程]