高耸进水塔拦污栅墩连系梁结构体系的抗震分析

针对高耸进水塔拦污栅墩连系梁结构在地震作用下容易产生较大的拉应力的现象,采用ANSYS有限元分析理论,建立进水塔有限元模型,选用反应谱法计算进水塔结构在地震作用下的动力响应。通过设计3种方案,对比研究拦污栅墩连系梁结构存在的必要性以及横梁(垂直水流向)、纵梁(顺水流向)尺寸大小对进水塔关键部位的应力和形变的影响。结果表明:高耸进水塔结构,增大横梁尺寸可减小自身轴向拉应力、并限制拦污栅墩位移。而增大纵梁尺寸则会对局部结构产生不利影响,因此适当增加横梁尺寸,减小纵梁尺寸可有效降低成本,提高结构安全度。该研究可为结构相似的进水塔拦污栅墩的连系梁尺寸调整提供参考。

Seismic analysis of connecting beam structure of trash rack on high-rise intake tower

In view of the phenomenon that the connecting beam of the high-rise intake tower is easy to generate large tensile stress under earthquake action, the finite element model of the intake tower was established by the ANSYS finite element analysis theory, and the dynamic response of the structure under earthquake action was calculated by the reaction spectrum method. By designing three schemes, the necessity of the existence of the connecting beam structure of the trash rack and the influence of the cross beam (vertical flow direction) and the longitudinal beam (flow direction) on the stress and deformation of the key part of the intake tower are studied. The results showed that the high intake tower can decrease the axial tensile stress and limit the displacement of the barrier pier, by increasing the cross beam size. Increasing the longitudinal beam size will adversely affect the local structure. Therefore, by appropriately increase the cross beam size and reduce the longitudinal beam size can effectively reduce the cost and improve the structural safety. This conclusion provides reference for the size adjustment of the connecting beam of high intake towers with similar structures.