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渡槽是输水工程中的控制性工程,在地震中容易发生破坏,导致沿线供水中断。虽然大量渡槽已经建成并投入使用,但关于渡槽的抗震研究还不够完善,在国内还没有统一的渡槽抗震简化计算方法。该文以流固耦合动力学为基础,结合反应谱理论,推导了渡槽横向地震响应的简化计算公式,并与非线性流固耦合有限元时程分析进行对比。对比结果表明:该文提出的简化计算方法可以快速计算渡槽的横向地震响应,计算结果不仅能够有效反映水体晃动对渡槽结构的减震作用,且与数值分析结果吻合较好。
Aqueduct is a controlled project in water conveyance project, which is prone to damage during earthquakes, resulting in water supply interruption along the route. Although a large number of aqueducts have been built and put into use, the research on aqueduct seismicity is still not perfect. There is no unified method to reduce the seismic resistance of aqueducts in China. Based on the fluid-structure interaction dynamics and the theory of response spectrum, a simplified calculation formula of aqueduct lateral seismic response is deduced and compared with the nonlinear finite element time-history analysis of fluid-structure interaction. The comparison results show that the simplified calculation method proposed in this paper can quickly calculate the transverse seismic response of the aqueduct. The calculated results can not only effectively reflect the damping effect of water sloshing on the aqueduct, but also agree well with the numerical analysis.