| 张社荣,黄虎.考虑地震行波效应的大型水电站高耸进水塔群响应分析[J].水利学报,2009,40(9): |
| 考虑地震行波效应的大型水电站高耸进水塔群响应分析 |
| Analysis on seismic response of high intake tower group considering the effect of traveling wave |
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| DOI： |
| 中文关键词: 进水塔 地震 行波效应 碰撞 动接触 |
| 英文关键词: high intake tower group seismic response traveling wave effect dynamic contact collision |
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| 中文摘要: |
| 本文基于行波法结构振动反应的基本方程，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，用动接触方法模拟了糯扎渡水电站进水口整体塔群在地震作用下的响应和相邻塔段之间的相互作用。实例计算表明，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也影响不明显。 |
| 英文摘要: |
| The seismic response of the high intake tower group in the Nuozadu Hydro project, China, was analyzed based on the equation of traveling wave method for structural vibration. The accelerations at multi position are directly input to simulate the vibration forms of structure and the dynamic contact method was applied to study the possible dynamic contacts among the towers during the variation of earthquake space. The result indicates that the traveling wave seismic may affect the response of the tower group. The maximum displacement at the top of towers in the direction perpendicular to the flow is about 1.7cm, if the effect of traveling wave is taken into account. It is a little bit larger than that without effect of traveling wave. The joints between towers will open with maximum opening equal to 79mm. Slight collision between towers may occur. |
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