基于MSC.Marc的高拱坝蓄水期变形分析

针对高拱坝复杂的结构布置及施工工艺,基于大型有限元分析软件MSC.Marc,在建立的包含坝体分缝的三维有限元非线性分析模型中,对坝体横缝采用Contact单元、诱导缝采用Gap单元分别进行模拟,并通过杀死、激活技术及子程序的应用,实现坝体浇筑、接缝灌浆及蓄水过程较为真实的模拟计算。工程实例分析获得了坝体施工蓄水期变形规律及不同分缝的开合度变化情况,指出考虑接触和施工蓄水模拟后,高水位时坝体最大径、切向位移均出现在距坝顶约1/3拱高处。

MSC.Marc-based deformation analysis of high arch dam in water storage period

A 3-D nonlinear finite element model of a high arch dam with complex construction technology and structure is established based on MSC.Marc software analysis.In this model,the dam transverse joints and induced joints are simulated as Contact elements and Gap elements,respectively.Then,by utilization of killing,activating element technology and application of a Marc subroutine,the accurate simulation of deformation during the dam pouring,joint grouting and water storage periods is realized.Through a case study,the deformation law in the water storage period and the opening-closing degree change of different joints are obtained.It is pointed out that the largest radial and tangential displacement occur at a location 1/3 of the dam height from the dam crest.