利用ansys solid65 单元探究复杂应力条件下的混凝土结构.pdfVIP

建筑结构,Building Structure,33(6), 2003,22~24 利用 ANSYS Solid 65 单元分析复杂应力条件下的混凝土结构 陆新征，江见鲸 清华大学土木工程系，北京，100084 摘 要：在大型有限元软件 ANSYS 中，为混凝土材料专门定义了一种单元：Solid 65。它 不但可以模拟混凝土材料特有的开裂，压碎等力学现象，而且预先定义好了混凝土的破坏准 则,为使用者提供了很多方便。在本文中，作者结合自己的科研工作，通过 4 个科研项目实 例，介绍了 Solid 65 单元在框架、叠合梁、约束混凝土柱、组合结构节点等问题中的应用。 详细讨论了 Solid 65 单元和钢筋、型钢、钢管、碳纤维等不同材料共同工作时建模的方法及 相互连接的处理。这些计算实例表明，在准确建立有限元模型并合理选择各种材料组合方法 的前提下，利用 ANSYS 可以对各种混凝土结构进行准确的模拟，从而可以减小试验工作量， 节省开支。但是，如果有限元模型建立不当，也会造成错误的结果，本文中对这些错误进行 归类分析，提出了解决方法。 关键词：有限元，混凝土，ANSYS ； Analysis for Concrete Structure under Complex Stress Condition with Solid 65 FEA Element of ANSYS LU Xinzheng, JIANG Jianjing Department of Civil Engineering, Tsinghua University, Beijing, 100084 Abstract: In the FEA software of ANSYS, an element type of “Solid 65” is defined for concrete material, specially. It not only can simulate the typical mechanics behavior of concrete such as crack and crush, but also includes the failure criteria of concrete. This applies a lot of convenience to the user. In this paper, according to the research work of the author, the applications of Solid 65 in frame structure, composite beam, confined column and joint of composite structure are presented together with 4 practical examples. And the methods to setup the connection between concrete and other materials are discussed in details, when the concrete is working together with other materials such as rebar, section steel, steel tube and carbon fiber. These examples show that with proper FEA model and connection method, ANSYS can simulate concrete structure precisely. Hence, it can reduce the test work and save the cost. However, if the FEA model is not correct, there will be mistakes in the results. These mistakes are classified in this paper and advises are given to avoid th