大跨度主-副桁架钢结构的地震反应探讨分析
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摘要
桁架钢结构被广泛应用于大跨度建筑中,分析桁架钢结构的地震反应具有一定的现实意义。构建大跨度主-副桁架钢结构的有限元模型,以该模型作为研究对象,对其进行地震反应的探讨分析。采用自振特性分析方法在刚度和质量两个因素的基础上分析大跨度主-副桁架钢结构的自振特性;通过振型分解反应谱法分析大跨度主-副桁架钢结构的力学性能,利用桁架钢结构的力学性能分析其地震作用下的反应。模拟发现,大跨度主-副桁架钢结构刚度较好,其抗风柱柱脚连接处的受力最强且位移最大,为大跨度主-副桁架钢结构的地震反应研究提供参考,为其抗震设计提供初步依据。
The steel-truss structure is widely used in long-span buildings, so it is of practical significance to analyze its seismic response. In this paper, we describe our construction of finite element models of a long-span main and auxiliary steel-truss structures and discuss their seismic responses. Based on the two elements of stiffness and mass, we perform a natural vibration analysis of the natural vibration characteristics of the large-span main and auxiliary steel-truss structures. We then analyze the structural mechanical properties of the structures using the modal decomposition response spectrum method, and analyze the seismic response of the steel-truss structures with respect to their mechanical properties. The simulated results show that the structural stiffness of the steel structures is good. These study results provide a preliminary basis for the seismic design of large-span main and auxiliary steel-truss structures.
The steel-truss structure is widely used in long-span buildings, so it is of practical significance to analyze its seismic response. In this paper, we describe our construction of finite element models of a long-span main and auxiliary steel-truss structures and discuss their seismic responses. Based on the two elements of stiffness and mass, we perform a natural vibration analysis of the natural vibration characteristics of the large-span main and auxiliary steel-truss structures. We then analyze the structural mechanical properties of the structures using the modal decomposition response spectrum method, and analyze the seismic response of the steel-truss structures with respect to their mechanical properties. The simulated results show that the structural stiffness of the steel structures is good. These study results provide a preliminary basis for the seismic design of large-span main and auxiliary steel-truss structures.
引文
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[3] 范栋浩,杜咏,盛红梅.高温下张弦梁结构力学特征解析解[J].工程力学,2016,33(4):195-204.FAN Donghao,DU Yong,SHENG Hongmei.Mathematical Calculations for the Characteristics of Beam Srting Structure in Fire[J].Engineering Mechanics,2016,33(4):195-204.
[4] 邱金水,陈如木,刘伯运,等.穿舱电缆密封结构力学特性研究[J].海军工程大学学报,2017,29(3):70-75.QIU Jinshui,CHEN Rumu,LIU Boyun,et al.On Mechanical Behavior of Leakproof Stucture of Cable[J].Journal of Naval University of Engineering,2017,29(3):70-75.
[5] 周奇才,吴青龙,陈明阳,等.基于灵敏度分析的桁架结构动力学尺寸优化[J].中国工程机械学报,2016,14(3):254-258.ZHOU Qicai,WU Qinglong,CHEN Mingyang,et al.Dynamic Size Optimization of Truss Based on Sensitivity Analysis[J].Chinese Journal of Construction Machinery,2016,14(3):254-258.
[6] 梁卫靖,郭强,张路.南宁某大跨桁架转换结构水平地震作用分析[J].建筑结构,2017,47(s1):502-506.LIANG Weijing,GUO Qiang,ZHANG Lu.Analysis of Horizontal Seismic Action with a Large-Span Truss Transfer of Nanning[J].Building Structure,2017,47(S1):502-506.
[7] 刘福寿,金栋平.环形桁架结构径向振动的等效圆环模型[J].力学学报,2016,48(5):1184-1191.LIU Fushou,JIN Dongping.Equivalent Circular Ring Model for the Radial Vibration Analysis of Hoop Truss Structures[J].Chinese Journal of Theoretical and Applied Mechanics,2016,48(5):1184-1191.
[8] 宋正华,姜东,曹芝腑,等.含铰可展桁架结构非线性模型修正方法研究[J].振动与冲击,2018,37(1):21-26.SONG Zhenghua,JIANG Dong,CA Zhifu,et al.Nonlinear Model Updating Method for Deployable Trusses with Joints[J].Journal of Vibration and Shock,2018,37(1):21-26.
[9] 娄峰,潘文智,石开荣,等.大型钢结构球形支座力学性能试验研究[J].施工技术,2017,46(18):35-38.LOU Feng,PAN Wenzhi,SHI Kairong,et al.Experimental Study on Mechanical Properties of Spherical Bearings for Large Steel Structure[J].Construction Technology,2017,46(18):35-38.
[10] 张同忠,胡川,陈水荣,等.矩形钢管柱与矩形钢管桁架螺栓连接节点力学性能分析[J].钢结构,2017,32(6):77-82,86.ZHANG Tongzhong,HU Chuan,CHEN Shuirong,et al.Mechanical Properties Analysis of Rectangular SteelTubular Column and Rectangular Steel Tubular Truss Bolted Joint[J].Steel Construction,2017,32(6):77-82,86.