【摘要】 基于流固耦合动力分析理论,采用数值模拟方法,对输入波形式、上部结构槽数及下部排架高度等若干渡槽设计因素进行数值计算分析,研究地震激励下渡槽动水压力特性。结果表明:单、多槽侧壁动水压力分布规律基本相同,多槽中壁动水压力数值约为侧壁的2倍。传统渡槽抗震计算采用Westergaard动水压力修正解析解,但其仅考虑单槽槽身结构,而数值计算结果表明排架高度对渡槽动水压力影响较大;基于常用排架渡槽有限元模型数值计算,拟合出包含下部排架高度参数的动水压力公式,可供渡槽抗震设计参考。更多还原

【Abstract】 Based on the fluid-structure interaction theory,a systematic study of the characteristics of hydrodynamic pressure acting on aqueducts under earthquake loads was conducted using the numerical simulation method and considering design factors such as the input waveforms,the number of grooves in the upper structure,and the height of the lower framework.The results show that the hydrodynamic pressure on the sidewalls of a single groove and sidewalls of multiple grooves is basically the same.The hydrodynamic pressure on the middle wall of the multiple grooves is about twice that on the sidewall.The traditional seismic calculation of aqueducts uses the Westergaard hydrodynamic pressure to modify the analytical solution,but it only takes the single-groove body structure into account,and the numerical results show that the height of the framework has significant influence on the hydrodynamic pressure on the aqueduct.Based on the numerical calculation of the commonly used finite element model for framework-supported aqueducts,a hydrodynamic pressure formula considering the height of the lower framework was obtained,which can provide a reference for seismic design of aqueducts.更多还原