排架-渡槽-水三维耦合体系地震响应分析

本文应用任意拉格朗日-欧拉(ALE)方法，针对不同的水位、不同支撑高度，研究渡槽结构在EL CennD地震波激励下的振动反应。研究表明，矩形渡槽中水体的晃动幅度十分显著，水体晃动呈多波振荡；排架高度越大，水体的晃动幅度越大，水体晃动反应越滞后于地震输入，个激励引起的动水压力对渡槽槽身应力的影响不可忽视；三维排架-渡槽-水耦合体的自振特性、排架高度、外激励等是影响渡槽中水体振荡反应和耦合体动力性能的重要参数，二维渡槽模型刚化了渡槽结构，不能真实反映三维耦合体的动力性能。

Seismic response of frame-supported large rectangular aqueduct-water 3-D coupling system

Arbitrary Lagrangian Eulerian (ALE) method is used to study the seismic response of frame-upported large-scale rectangular aqueduct-water system and reaction of aqueduct structure with different depths of water and different heights of support under EL Centro earthquake action. It is found that significant sloshing occur to the water in the aqueduct, which presents a multi-wave behavior. With the increase of the height of frame the sloshing amplitude of the aqueduct-water system become larger, and the sloshing effect is lagged behind the earthquake action. The effect of hydrodynamics pressure acting on the aqueduct wall due to external excitation is significant. The characteristic of the self-vibration, height of frame and the external excitation are the main parameters affecting the sloshing effect of water and dynamic characteristics of the coupling system. The 2-D rigidified aqueduct cannot correctly simulate the dynamic characteristics of the complicated 3-D frame-aqueduct water coupling system.