【摘要】 为研究烟囱在地震作用下的动力特性和地震反应,应用有限元分析软件,对天津某钢厂150 m钢筋混凝土烟囱进行模拟分析。分析结果表明,在罕遇地震作用下,烟囱顶部位移的时程反应比多遇地震增加显著,其烟囱顶部加速度有明显动力放大效应;结构的变形到达峰值的时刻随着阻尼比的增大,烟囱顶点位移达到峰值的时间有提前的趋势;在双向地震波同时输入时,Y方向的位移分量、速度分量和加速度分量增加显著,而X方向基本没有变化。烟囱阻尼比和二维地震波参数变化对烟囱地震反应的影响较为明显。更多还原

【Abstract】 Taking the reinforced concrete chimney in a certain plant of Tianjin for example,the dynamic properties and seismic response of chimney under earthquake action are analysed here based on the finite element analysis software,so as to provide references for the anti-quake design of tall chimney structures.The analysis results show that the effect of the damping ratio and seismic parameter variation are relatively obvious on seismic response of the chimney,and the analysis of calculation results manifests the validity and efficiency of using the three-dimensional finite element model in terms of seismic reaction analysis.更多还原