哈尔滨工程大学学报2025，Vol.46Issue(5)：899-907,9.DOI:10.11990/jheu.202304038
考虑多点输入的桂松干渠渡槽地震响应分析
Seismic response analysis of Guisong aqueduct considering multipoint input
摘要
Abstract
When the span of aqueduct is large,there is correlation between the ground motion frequency and phase of each support,so it is necessary to consider the influence of the coherence change on the structure in seismic response analysis.This study focuses on the Dapo aqueduct of the Guisong Trunk Canal in central Guizhou,examining the dy-namic response of the aqueduct structure under synthetic wave and multipoint excitation,considering the spatial vari-ation of ground motion.The fluid-structure interaction between the water body and the aqueduct walls was simplified using the Westergaard additional mass method.A fluid-structure coupling dynamic analysis model was then developed to calculate the displacement and offset of the aqueduct structure under both empty and full water conditions,followed by damage assessment.The results show that the aqueduct experiences significant transverse displacement when filled with water during an earthquake,although most of the structure remains in an elastic state.Large-scale plastic dam-age occurs in the supporting columns at both ends of the aqueduct,with some reinforcement at the bottom yielding,yet the deformation meets relevant specifications.Under uniform excitation,the supporting columns at both ends show extensive plastic damage,while other columns are less affected.By contrast,under multipoint excitation,all support-ing columns exhibit large-scale plastic damage.Both excitation types cause concentrated plastic damage at the contact points between the aqueduct bottom and trough pier,as well as at the joints between the trough and the beam.The study reveals that damage areas at the joints between the aqueduct body and the beam,the trough body and the pier,and the supporting columns are larger under multipoint excitation,with greater vertex displacement offset observed.关键词
大型渡槽/人工合成波/地震动/多点输入/动力响应/Westergaard附加质量法/流固耦合/损伤评估Key words
large aqueduct/synthetic wave/earthquake motion/multipoint input/dynamic response/Westergaard added mass method/fluid-structure interaction/damage assessment分类
建筑与水利引用本文复制引用
张中昊,吴谦,汪可欣,单立博..考虑多点输入的桂松干渠渡槽地震响应分析[J].哈尔滨工程大学学报,2025,46(5):899-907,9.基金项目
黑龙江省本科高校"优秀青年教师基础研究支持计划"重点项目(YQJH2023183) （YQJH2023183）
黑龙江省自然科学基金项目2018007) （）
黑龙江省博士后科研启动基金项目(LBH-Q17025) （LBH-Q17025）
东北农业大学"学术骨干"项目(54936512). （54936512）
