斜拉桁架施加预应力后的节点位移分析与拟合
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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 bearing loads.The cable-stayed 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.
Cable-stayed truss with triangular cross-section has been adopted in this paper.It has great unloading effect and is more reasonable when bearing loads.The cable-stayed 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.
引文
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[13]肖汝诚,项海帆.斜拉桥索力优化的影响矩阵法[J].同济大学学报(自然科学版),1998,26(3):235-240.
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[15]张圣勤.MATLAB7.0实用教程[M].北京:机械工业出版社,2006.
[2]汪长林.斜拉空间桁架结构在静力和竖向地震作用下的受力性能[D].西安:西安建筑科技大学,2006.
[3]邓华.拉索预应力空间网格结构设计的几个概念[J].工业建筑,2002,30(10):64-67.
[4]董石麟,邓华.预应力网架结构的简捷计算法及施工张拉全过程分析[J].建筑结构学报,2001,22(2):18-22.
[5]冯健,张耀康.预应力斜拉网格结构的静力优化分析[J].东南大学学报(自然科学版),2004,33(5):583-587.
[6]严慧,熊卫.斜拉网架结构静力、动力特性的研究[J].工程力学,1994(增刊),1379-1384.
[7]蓝天.空间钢结构的应用和发展[J].建筑结构学报,2001,22(4),2-8.
[8]曹亮良.某车站雨棚斜拉立体桁架结构的静力有限元分析[D].西安:西安建筑科技大学,2008.
[9]RAJENDRAN M,MURUGADOSS J,JUSTIN S.Optimal de-sign of space truss using ant colony metaphor and genetic al-gorithm-a comparative study[J].Journal of Structural En-gineering,2006,33(3):215-224.
[10]缪正华,于月民,丁元柱.形状记忆聚合物复合材料梁的弯曲变形[J].黑龙江科技学院学报,2008,18(1):73-76.
[11]GRECO M,GESUALDO F,VENTURING W,et al.Non-linear positional formulation for space truss analysis[J].Fi-nite Elements in Analysis and Design,2006,42(12):1079-1086.
[12]孙伟.预应力钢桁架结构的设计与极限承载力分析[J].河北工程大学学报(自然科学版),2009,26(1):46-50.
[13]肖汝诚,项海帆.斜拉桥索力优化的影响矩阵法[J].同济大学学报(自然科学版),1998,26(3):235-240.
[14]高永强,王秀红.考虑弯曲刚度的斜拉索固有振动特性分析[J].河北工程大学学报(自然科学版),2008,25(4):20-24.
[15]张圣勤.MATLAB7.0实用教程[M].北京:机械工业出版社,2006.
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