钢筋砼电视塔地震反应的高振型影响
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摘要
钢筋砼电视塔为自立式高柔伸臂结构,在地震反应中,高振型的影响不容忽视.为从量上把握高振型的影响程度,本文采用基于振型叠加法的结构地震响应历程分析方法,分析了各阶振型尤其是高振型在响应时程内对结构总反应的贡献.结果表明:十阶以内的振型对结构地震反应的影响不容忽视,十阶以后的高振型则影响甚微.
R.C.TV tower is a special structure which is much more slender than general high-rise building structure. The influence of high modes of the structure will be remarkable. For studying the influence degrees, this paper uses the direct dynamic analysis method of structural seismic response which is based on the mode - superposition and investigates the contributions of every mode of the structure to seismic response, specially the contributions of high modes. The analysis results indicate that the contributions of the first ten modes should not be neglected and the-contributions of the other modes are negligible.
R.C.TV tower is a special structure which is much more slender than general high-rise building structure. The influence of high modes of the structure will be remarkable. For studying the influence degrees, this paper uses the direct dynamic analysis method of structural seismic response which is based on the mode - superposition and investigates the contributions of every mode of the structure to seismic response, specially the contributions of high modes. The analysis results indicate that the contributions of the first ten modes should not be neglected and the-contributions of the other modes are negligible.
引文
[1]吴广珊等.高耸钢筋砼电视塔模型动力特性的敲击法试验研究.烟台大学学报,1994;(3).
[2]吴广珊.高耸钢筋砼电视塔模型的动力特性及地震反应.硕士学位论文,清华大学土木工程系,1989.
[3]R.W.克拉夫,J.彭津著.王光远等译.结构动力学.北京:科学出版社,1981.
[2]吴广珊.高耸钢筋砼电视塔模型的动力特性及地震反应.硕士学位论文,清华大学土木工程系,1989.
[3]R.W.克拉夫,J.彭津著.王光远等译.结构动力学.北京:科学出版社,1981.
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