竖向地震作用对超大型冷却塔结构的影响分析

采用ABAQUS有限元分析软件,分别对不考虑和考虑土-结构相互作用的超大型冷却塔结构进行了弹性和弹塑性时程分析,研究了竖向地震作用对超大型冷却塔结构的影响以及考虑土-结构相互作用后竖向地震作用影响的差异。结果表明:竖向地震作用对冷却塔塔壳的竖向加速度和竖向位移、塔壳喉部主应力影响明显,对支柱轴力有一定影响,对结构水平向的地震响应影响相对较小;考虑土-结构相互作用后,竖向地震作用对支柱的竖向加速度、支柱内力以及塔壳喉部的主应力影响略有增大。

Influence of Vertical Earthquake Action on Super Large Cooling Tower

Using ABAQUS finite element analysis software,elastic and elastic-plastic time-history analysis are conducted respectively on super large cooling tower considering soil-structure interaction or not.The influence of vertical earthquake action on super large cooling tower and the difference after considering soil-structure interaction are investigated.The results show that the vertical earthquake action affects obviously on vertical acceleration and vertical displacement of upper structure and the principal stress at the throat of the cooling tower.It also affects axial force of columns to a certain extent.But the influence of vertical earthquake action on the horizontal seismic response of structure is relatively minor.After considering the soil-structure interaction,the influence of vertical earthquake action on the vertical acceleration and the internal forces of columns and the principal stress at the throat of the cooling tower is slightly increased.