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钢管混凝土模型拱动力特性分析
引用本文:熊峰,刘浩吾.钢管混凝土模型拱动力特性分析[J].西南交通大学学报,2005,40(2):195-199.
作者姓名:熊峰  刘浩吾
作者单位:1. 四川大学建筑与环境学院,四川,成都,610065
2. 四川大学水利水电工程学院,四川,成都,610065
基金项目:国家自然科学基金资助项目(50078016),土木工程防灾国家重点实验室开放基金资助项目
摘    要:通过振动台试验,获得了钢管混凝土模型拱结构的自振频率.利用结构分析软件SAP2000,采用三维梁单元,视钢管混凝土为组合材料,对结构动力特性进行了有限元计算,获得了结构的频率和振型,计算结果与试验结果吻合较好.为了扩大研究的范围,进一步分析了模型拱在不同条件下的动力特性.通过改变拱肋的刚度、横撑数目以及支撑条件,研究了结构频率和振型的变化,分析了影响钢管混凝土拱结构动力特性的因素.结果表明,加强横撑有利于提高结构的横向自振频率,拱肋刚度对结构自振频率影响不大.

关 键 词:钢管混凝土拱结构  动力特性  振动台试验
文章编号:0258-2724(2005)02-0195-05

Analysis for Dynamic Properties of Model Arch Structure of Concrete-Filled Steel Tube
XIONG Feng,LIU Hao-wu.Analysis for Dynamic Properties of Model Arch Structure of Concrete-Filled Steel Tube[J].Journal of Southwest Jiaotong University,2005,40(2):195-199.
Authors:XIONG Feng  LIU Hao-wu
Abstract:The natural frequencies of a model arch structure of concrete-filled steel tube were got by shaking table tests. In addition, a structural analysis software SAP2000 and the finite element method were used to obtain the natural frequencies and vibration modes of the structure. In the numerical analysis three dimensional beam elements were adopted and concrete-filled steel tube was taken as a combinatorial material. The computed results get a good agreement with the experimental ones. To extend the research, the dynamic properties of the model arch structure were analyzed under different cases. Through changing the structural stiffness, the number of lateral braces and fixed conditions, the changes of the natural frequencies and vibration modes were researched and factors influencing the dynamic properties of concrete-filled steel tubular arch structures were analyzed. The result shows that increasing lateral braces can increase the lateral frequencies of an arch structure, the stiffness of arch rib is not an important influencing factor to its natural frequencies.
Keywords:concrete-filled steel tubular arch  dynamic properties  shaking table test
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