预应力简支钢箱梁自振频率研究  

STUDY ON NATURAL FREQUENCIES OF SIMPLY SUPPORTED STEEL BOX GIRDER WITH PRESTRESSED TENDONS

作　　者：王佳伟[1] 贾艳敏[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《工程力学》2009年第1期120-124,共5页Engineering Mechanics

基　　金：黑龙江省交通厅2006年重点科技项目

摘　　要：建立了预应力钢箱梁振动性能的非线性分析模型,并推导了曲线型布索的预应力简支钢箱梁自振频率计算公式;以曲线型布索的预应力简支钢箱梁试验模型为基础,应用有限元分析软件ANSYS建立了预应力简支钢箱梁模型并对其进行模态分析,通过模型试验的自振频率测试结果和有限元分析结果验证了理论公式推导的正确性;采用理论计算和有限元数值计算相结合的方法研究了预应力钢索索力、锚固位置对预应力简支钢箱梁自振频率的影响。A nonlinear analytical model is formulated for the dynamic behavior of a simply supported steel box girder with curved prestressed tendons. The equation of motion for this steel box girder is rigorously derived using the variational principal of virtual work. A finite element model, based on the experimental model of the large-scale steel box girder with curved prestressed tendons, is established with ANSYS finite element analysis software. The accuracy of the proposed analysis is verified by the comparison between the result of dynamic testing on a large-scale steel box girder and that of finite element analysis. This paper presents the influence of the magnitude of prestress force, eccentricity of anchor on natural frequency of simply supported steel box girder with prestressed tendons.

关 键 词：预应力简支钢箱梁 动力性能 自振频率 模态分析 模型试验 

分 类 号：TU394[建筑科学—结构工程] TU311.3