西北水电Issue(4)：65-70,6.DOI:10.3969/j.issn.1006-2610.2026.04.009
基于流固耦合的U形渡槽横向地震响应简化计算方法
Simplified Calculation Method for Transverse Seismic Response of U-shaped Aqueduct Based on Fluid-Structure Interaction
摘要
Abstract
Aiming at the high complexity and low computational efficiency of the traditional fluid-structure interaction time-history anal-ysis method adopted in the transverse seismic design of U-shaped aqueducts,a simplified calculation method based on potential flow theory and response spectrum method is proposed.In this method,the dynamic effect of water inside the aqueduct under seismic excita-tion is decomposed into impulsive pressure and hydrodynamic sloshing pressure,which are equivalently converted into additional masses acting on the aqueduct structure.Furthermore,the analytical expression of hydrodynamic pressure for U-shaped cross-section is de-rived.Combined with the design response spectrum specified in seismic codes,the square root of the sum of squares(SRSS)method is used for mode superposition,and explicit formulas for key seismic responses such as pier base shear force are established.The pro-posed method is verified taking the 120 m-span continuous rigid-frame aqueduct at Sujiamiao as an engineering case.A refined two-dimensional fluid-structure interaction finite element model is built in ANSYS to carry out nonlinear time-history analysis for compara-tive verification.The results show that the proposed simplified method can effectively simulate fluid-structure interaction effects.The calculated pier base shear force agrees well with refined finite element simulation results,with a relative peak error of approximately 8.2%.In terms of computational efficiency,the method avoids complicated modeling and time-consuming computation;key response estimation can be completed within several minutes,greatly improving analysis speed.This method can serve as an efficient and relia-ble theoretical tool for preliminary seismic design,rapid safety evaluation and shape parameter optimization of aqueduct structures.关键词
渡槽/流固耦合/横向地震响应/简化计算/动水压力Key words
aqueduct/fluid-structure interaction/transverse seismic response/simplified calculation/hydrodynamic pressure分类
建筑与水利引用本文复制引用
刘毅斌,任苇,刘昊男,杨徐千..基于流固耦合的U形渡槽横向地震响应简化计算方法[J].西北水电,2026,(4):65-70,6.基金项目
陕西省自然科学基础研究计划项目(2022JQ-467) （2022JQ-467）
中国电建集团西北勘测设计研究院有限公司科研项目(2023100010) （2023100010）
