摘要
抽水蓄能电站地下厂房板梁柱结构在水力脉动作用下的动力响应值过大,是厂房结构抗振设计时需要关注的问题。依托某抽水蓄能电站地下厂房结构建立三维有限元模型,着重计算分析厂房楼板、立柱和楼梯结构在水力脉动作用下的振动响应,并针对振动响应较大的部位提出相应的优化设计方案,通过计算分析不同优化方案下厂房结构的水力脉动响应规律,对厂房板梁柱结构抗振优化提出建议。结果表明:针对立柱中段振动响应较大的情况,增设与立柱相同断面尺寸的水平横梁,其抗振效果明显优于单纯调整立柱截面尺寸的方案,并且增加该水平横梁能有效降低楼梯的振动响应;通过增加楼梯厚度或在其最大振动响应位置处增设一道0.5 m厚的墙体,均可有效降低楼梯的振动响应,其中将楼梯厚度调整为0.35 m的抗振优化效果最为显著。
The excessive dynamic response of plate-beam-column structural systems in underground powerhouses of pumped storage plants under hydraulic pulsation loads is a critical issue in the vibration-resistant design of powerhouse structures.A three-dimensional finite element model is developed based on the structural configuration of an underground powerhouse in a pumped storage power station.The primary focus is on calculating and analyzing the vibration response of key structural components,including the floor slabs,columns,and staircases,under hydraulic pulsation,and proposes optimization measures for components with excessive vibrations.Through computational analysis of hydraulic pulsation responses under different optimization schemes,this study proposes mitigation strategies for beam-columnslab structures in industrial plants.The results demonstrate that:For columns exhibiting high vibration amplitude in their mid-sections,adding horizontal beams with cross-sectional dimensions identical to those of the columns yields a significantly superior vibration reduction effect compared to merely adjusting the column cross-sectional size.Furthermore,the incorporation of horizontal beams effectively mitigates the vibration response of staircases.By increasing the thickness of staircases or adding a 0.5 m-thick wall at the locations of maximum vibration response,the vibration of staircases can be effectively reduced.Among these measures,adjusting the staircase thickness to 0.35 m proves to be the most effective in optimizing vibration performance.
作者
周超月
吴海林
何卫平
刘杰
ZHOU Chao-yue;WU Hai-lin;HE Wei-ping;LIU Jie(College of Hydraulic&Environmental Engineering,China Three Gorges University,Yichang 443002,Hubei Province,China)
出处
《中国农村水利水电》
北大核心
2026年第3期194-200,共7页
China Rural Water and Hydropower
基金
国家自然科学基金(51879146)。
关键词
抽水蓄能电站
地下厂房
板梁柱结构
水力脉动响应
数值模拟
pumped storage power station
underground powerhouse
plate-beam-column structure
hydraulic pulsation response
numerical simulation
