考虑地震行波效应的大型水电站高耸进水塔群响应分析及碰撞研究

摘要：大型水电站进水塔塔群横向跨度大，地震空间效应会对塔群产生影响，工程界十分关注，真实模拟塔群结构对地震行波效应的响应也是计算分析的一个难点。本文采用直接加速度多点输入模拟大跨度结构在地震空间变化时的结构振动形态，用动接触方法模拟相邻塔段之间相互作用。计算表明对于大跨度高耸结构，地震行波效应对塔体动力反应有存在一定的影响，设计中需给予考虑；考虑行波效应时塔段之间分缝张开、而且有塔段碰撞现象；考虑地震行波效应与否对塔体顺水流向位移影响不大，对应力分布及最大值影响不明显。

The seismic response analysis and collision research on high inlet water towers of big hydropower station under traveling wave effect

Abstract: The span of big hydropower station high inlet water towers is long, the effect of seismic traveling wave is paid for more attention in engineering field, so there is a problem with the simulation of the seismic traveling wave effect in analysis for inlet water towers. In this paper, multi-point input for long span structure was used for simulating the structure form, and the method of dynamic contact was used for the towers. The result indicate, the seismic response exist in the long span high inlet tower considered traveling wave effect, it should be regarded in design; there are some patulous slots and collision between towers; and little effect gained for the displacement and the stress of towers considering traveling wave effect.