摘要
调压井作为一种地下薄壁结构,其动力特性对于围岩地质条件十分敏感。本文结合一工程实例,运用瞬态动力学方法,在进行调压井自振特性分析的基础上,按照单纯考虑水平地震荷载作用及考虑水平与竖向地震荷载组合作用两种计算工况,对不利围岩地质条件下施工期调压井的动力响应特性进行了有限元仿真分析。结果表明:在水平与竖向地震荷载组合作用下,衬砌结构位移及应力的分布规律与单纯水平地震荷载作用情况基本相同,但其位移及应力均有所增大。由此说明,地震组合作用增加了衬砌结构的动力反应,竖向地震作用也会影响衬砌结构水平方向的动力反应。因此,在进行调压井结构的抗震设计时,考虑水平与竖向地震的组合作用是必要的。
The surge tank is a kind of underground hydraulic structure.The dynamic characteristics of surge tank are comparatively sensitive to geology condition.Combined with one hydroelectric station＇s surge tank of Morocco in complicated geology condition,the dynamic characteristic of surge tank in construction period is analyzed by 3-D dynamic finite element method in this paper.The results showed the coupling effect of horizontal and vertical earthquake will obviously strengthen dynamic reaction of surge tank lining structure.Therefore,it is necessary to consider the coupling effect of horizontal and vertical earthquake in the anti-earthquake design of the surge tank.
出处
《水资源与水工程学报》
2011年第4期25-30,共6页
Journal of Water Resources and Water Engineering
基金
陕西省教育厅科学研究计划项目(03JK098)
关键词
水工结构
复杂围岩条件
施工期
调压井
动力特性
hydro-structure
complex geological condition
construction period
surge tank
dynamic characteristics
