西南交通大学学报 2005, 40(2) 195-199 DOI:     ISSN: 0258-2724 CN: 51-1277/U

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本文关键词相关文章
钢管混凝土拱结构
动力特性
振动台试验
本文作者相关文章
熊 峰
刘浩吾
PubMed
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钢管混凝土模型拱动力特性分析

熊 峰;刘浩吾

四川大学建筑与环境学院,四川成都610065; 四川大学水利水电工程学院,四川成都610065

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   

Analysis for Dynam ic Properties ofM odelArch Structure ofConcrete-Filled SteelTube

XIONG Feng; LIUHao-wu

Dept. ofCivilEng., SichuanUniversity, Chengdu 610065, China; College ofWaterResource andHydropower, SichuanUniversity, Chengdu 610065, China

Abstract:

The natural frequencies of amodel arch structure of concrete-filled steel tube were got by shaking table tests. In addition, a structural analysis software SAP2000 and the finite elementmethod were used to obtain the natural frequencies and vibration modes of the structure. In the numerical analysis three dimensional beam elementswere adopted and concrete-filled steel tube was taken as a combinatorialmateria.l The computed results get a good agreementwith the experimental ones. To extend the research, the dynamic properties of themodel arch structurewere analyzed under different cases. Through changing the structural stiffness, the numberof lateralbraces 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 structureswere analyzed. The resultshows that increasing lateralbraces 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: dynamic properties   shaking table test    concrete-filled steel tubular arch  
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