基于MSC.Marc的碾压混凝土重力坝动力计算

Dynamic Calculation of Roller Compacted Concrete Gravity Dam Based on MSC.Marc

针对MSC.Marc软件进行结构振型分解反应谱法动力分析时后处理方面的不足,通过Marc软件子程序接口FORCDT,利用Fortran语言开发的程序,实现了基于Marc软件的振型分解反应谱法结构动力响应分析。采用该程序对某碾压混凝土重力坝进行动力分析,结果表明该碾压混凝土重力坝整体应力状态良好,除坝踵附近和碾压混凝土层面上游侧的局部范围受应力集中影响,竖直向拉应力超过坝体材料的抗拉强度外,其余部位的应力和坝体强度安全均满足规范要求,验证了所开发程序的可行性。

To deal with the deficiency of post-processing for dynamic analysis of structures with mode-superposition response spectrum method in MSC software, Fortran language is used to develop the programs through subroutine interface FORCDT in Marc, which realizes the dynamic response analysis of structures based mode-superposition response spectrum method in MSC software. Dynamic analysis of one roller compacted concrete gravity dam was accomplished by using the developed programs. The results show that the integral stress state of the roller compacted concrete gravity dam is good; except the vertical normal stresses of nearby dam heel and partially upstream range of roller Compacted concrete layer which is influenced by stress concentration exceed the tensile strength of material, both the stress of other area and strength safety of dam body meet requirement of specification. The engineering example demnostrates that the developed programs are feasible.