斜拉桁架施加预应力后的节点位移分析与拟合  

Analysis and fitting to nodal displacements of cable-stayed truss with triangular cross-section after applying prestressing force

作　　者：仲济涛[1] 何丽丽[1] 高瑞贞[1] 张京军[1] 

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038

出　　处：《河北工程大学学报（自然科学版）》2009年第4期1-3,12,共4页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：河北省自然科学基金资助项目(E2008000731);河北省教育厅科学研究计划资助项目(2006107)

摘　　要：斜拉桁架采用了卸载效应大,受力合理的三角形截面。运用ANSYS10.0软件建立了斜拉立体桁架模型,并对其斜拉索中施加不同预应力后的节点竖向位移进行了分析,通过MAT-LAB7.0软件对节点竖向位移进行拟合,得到了拟合曲线多项式,克服了以往单纯针对节点进行分析的缺陷。分析结果表明,斜拉索中施加预应力可以很好地控制结构的竖向位移。Cable - stayed truss with triangular cross - section has been adopted in this paper. It has great unloading effect and is more reasonable when beating loads. The cablestayed space truss model was built by ANSYS10.0 software. The analysis is performed for vertical displacements of nodes after applying various prestressing force to stayed cables. Then the vertical displacements of nodes are fitted by MATLAB7.0 software and the curve - fitting polynomials are obtained, which overcomes the disadvantage that only nodal analysis was performed before. The analysis results show that applying prestressing force to stayed cables can control the vertical displacements well.

关 键 词：斜拉桁架 预应力 位移 ANSYS MATLAB 

分 类 号：TU311.4[建筑科学—结构工程]