地下厂房异型机墩结构动力分析

Dynamic analysis for special shape supporting structures of a underground hydropower building

用三维有限元方法,对国外某水电站地下厂房的环梁三立柱式异型机墩及风罩、厂房墙体、楼板梁系统所组成的整体结构进行了动力分析;对厂房内各种振源频率与支承结构固有频率间的耦合共振情况进行了校核。结果表明,该异型机墩结构的动力设计是实际可行的,对以后该种机墩结构型式的推广应用有重要的参考价值。

By the 3-D finite element method, this paper has completed dynamic analysis of the whole systems of a underground powerhouse, which is composed of a circular beam with three special shaped columns, bellows, walls, floor and beams. A resonance check between the frequencies of the vibration sources in the powerhouse and the inherent frequencies of the supporting structure is achieved, and the results show that the dynamic design of the underground powerhouse with special shape supporting structures is feasible.