非线性对大跨度张弦空间管桁结构荷载效应的影响
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摘要
以某展览馆屋盖工程为例建立有限元模型,利用ANSYS有限元软件及其APDL参数化语言建模计算分析,并在张弦管桁结构各个部位选择部分节点的位移和杆件的轴力,分析非线性对大跨度张弦管桁结构荷载效应的影响。研究表明:90m跨单榀张弦空间管桁结构在静态荷载(主要是指恒载、活载)的作用下,是否考虑非线性,对节点位移和轴力的影响总体较小,对轴力影响相对较大的是撑杆。就整体结构而言,材料非线性的影响较小。
An exhibition hall’s roof project was regarded as the engineering background, the ANSYS finite element software and APDL parametric design language were used, some node displacements and the axial forces were selected in order to analyze load effects for non-linear of long-span spatial tubular truss string structure.The results showed that the effects of nodal displacements and the axial forces were small whether to consider non-linear,the impact of pole’s axial forces was relatively large under the static load (mainly refered to the dead load, live load). On the whole structure, the effects of material nonlinearity was very small.
An exhibition hall’s roof project was regarded as the engineering background, the ANSYS finite element software and APDL parametric design language were used, some node displacements and the axial forces were selected in order to analyze load effects for non-linear of long-span spatial tubular truss string structure.The results showed that the effects of nodal displacements and the axial forces were small whether to consider non-linear,the impact of pole’s axial forces was relatively large under the static load (mainly refered to the dead load, live load). On the whole structure, the effects of material nonlinearity was very small.
引文
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[2]王秀丽.大跨度空间钢结构分析与概念设计[M].北京:机械工业出版社,2008.
[3]Guo Hao.Parametric Analysis of Single Beam String Struc-ture’s Mechanical Behavior and Study on Its Seismic Behavior[D].Xi’an:Chang’an University,2008.
[4]白正仙.张弦梁结构的理论分析与试验研究[D].天津:天津大学,1999.
[5]Zhang Q L.A Modified Nonlinear Member Element Allowing Large Loading and Displacement Increments[J].Communi-eations in Numerical Methods in Engineering,1996,12:23-24.
[6]The Writers of ANSYS Release11.0.Theory Reference for ANSYS11.0[M].Canonsburg,PA,USA:2009.
[7]The Writers of ANSYS Release11.0.Element Reference for ANSYS11.0[M].Canonsburg,PA,USA:2009.
[8]吕晓静.张弦空间桁架的静力性能及稳定性分析[D].西安:西安建筑科技大学,2003.
[9]刘尚伦.大跨度张弦桁架结构弹塑性地震响应分析[D].太原:太原理工大学,2008.
[10]管鹏.大跨度张弦立体桁架结构的找形和竖向地震响应研究[D].西安:西安建筑科技大学,2008.
[11]龚曙光,谢桂兰.ANSYS操作命令与参数化编程[M].北京:机械工业出版社,2004.
[12]胡国良,任继文.ANSYS11.0有限元分析入门与提高[M].北京:国防工业出版社,2009.
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