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1. 安装MSC.MARC 2005有限元分析程序
2. 需自己准备混凝土材料参数输入文件“matcode.txt”, 其中 第一行需要输入 混凝土材料的种类数目，以下各行分别输入每种混凝土材料的弹性模量和单轴受压峰值强度（均以MPa为单位）
3. 执行方式为 m4_28_public -j UniComp_job1

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 论 文 题 目 期刊/会议名称 下载 基于通用有限元程序和微平面模型分析复杂应力混凝土结构 沈阳建筑大学学报(自然科学版), 2008 点击下载 Nonlinear FE model for RC shear walls based on multi-layer shell element and microplane constitutive model Proc. Computational Methods in Engineering And Science (EPMESC X), 2006 点击下载

Abstract: Nonlinear simulations for structures under disasters have been widely focused on in recent years. However, precise modeling for the nonlinear behavior of reinforced concrete (RC) shear walls, which are the major lateral-force-resistant structural member in high-rise buildings, still has not been successfully solved. In this paper, based on the principles of composite material mechanics, a multi-layer shell element model is proposed to simulate the coupled in-plane/out-plane bending and the coupled in-plane bending-shear nonlinear behaviors of RC shear wall. The multi-layer shell element is made up of many layers with different thickness. And different material models (concrete or rebar) are assigned to various layers so that the structural performance of the shear wall can be directly connected with the material constitutive law. And besides the traditional elasto-plastic-fracture constitutive model for concrete, which is efficient but does not give satisfying performance for concrete under complicated stress condition, a novel concrete constitutive model, referred as microplane model, which is originally proposed by Bazant et al., is developed to provide a better simulation for concrete in shear wall under complicated stress conditions and stress histories. Three walls under static push-over load and cyclic load were analyzed with the proposed shear wall model for demonstration. The simulation results show that the multi-layer shell elements can correctly simulate the coupled in-plane/out-plane bending failure for tall walls and the coupled in-plane bending-shear failure for short walls. And with microplane concrete constitutive law, the cycle behavior and the damage accumulation of shear wall can be precisely modeled, which is very important for the performance-based design of structures under disaster loads.

Keywords: shear wall, nonlinear analysis, microplane, finite element, multi-layer shell element

 单轴受压 单轴受拉 双轴破坏包络面 三轴受力破坏包络面 静水压力 滞回受力

 缪志伟, 陆新征, 李易, 叶列平, 基于通用有限元程序和微平面模型分析复杂应力混凝土结构, 沈阳建筑大学学报(自然科学版), 2008, 24(1), 49-53. Miao ZW, Lu XZ, Jiang JJ, Ye LP, Nonlinear FE model for RC shear walls based on multi-layer shell element and microplane constitutive model, Proc. Computational Methods in Engineering And Science (EPMESC X), Tsinghua University Press & Springer-Verlag, Aug. 2006, Sanya, Hainan,China, 2006, CDROM.
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