钢筋混凝土有限元在ANSYS中的实现.docxVIP

钢筋混凝土结构非线性有限元在 ANSYS 中的分析 王宝辉 （武汉理工大学 土建学院 430070） 摘 要:钢筋混凝土在土木工程中应用最为广泛,ANSYS 是功能最为齐全，是当今国际上流行的有限元分析软件,提供了多种单元模型和材料模型.但是由于混凝土材料的力学性能较为复杂.很难选取一种合适的模型来摸拟混凝土材料的本构关系。经济快捷的利用 ANSYS 对混凝土结构进行数值模拟计算，对提高整个土木工程行业的设计水平和质量，增加工程的综合经济效益有着重要的意义。非线性有限元方法可以满足人们对钢筋混凝土结构深入认识的需要,但是对钢筋混凝土结构进行有限元分析还存在不少困难。最后,结合一具体钢筋混凝土简支梁,应用ANSYS对其进行了有限元分析,并将计算值与实测值比较,结果表明该方法精度较高。 关键词: ANSYS;钢筋混凝土; 非线性有限元; 混凝土本构模型 Nonlinear Finite Element Analysis of Reinforced Concrete strueture with ANSYS Wang Baohui （College of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070） Abstract: Reinforced concrete and prestressed concrete structure applies in the civil engineering widely, ANSYS is the large-scale general FEA software whose function is most complete , Popular finite element code ANSYS provide many element models and material models, however it is still difficult to choice a proper model because the material properties of concrete are complex. It has great significance that to enhance the design level and the quality of the entire civil engineering profession and to increase comprehensive economic benefit of project, if the civil engineers can make expertly numerical simulation to concrete structure with ANSYS. Nonlinear finite element method for reinforced concrete structures to meet people s needs in-depth understanding , but of reinforced concrete structures for finite element analysis are still many difficulties. Finally, a concrete reinforced concrete simply supported beam, the ANSYS finite element analysis was carried out , and the calculated value is compared with the measured values ??, the results show that the method has a high accuracy. Key words: ANSYS; reinforcement concrete structure ; nonlinear finite element; constitutive model of concrete 1前言 混凝土是一种力学性能十分复杂的建筑材料,由水泥、砂、石、水及各种外加剂硬化而成,成分复杂,性能多样.迄今为止,还不能说对混凝土的力学性能己经完全掌握了。对于钢筋混凝土结构的分析和强度计算,传统的方法是建立基于大量试验研究的经验公式,对于常规设计而言,这种方法仍不失其实用价值。但是基于试验数据的经验公式并不能满足人们对钢筋混凝土结构深入认识的需要,诸如混凝土的弹塑性性质、混凝土的开裂及钢筋与混凝土的交互作用等。 1967年,Ngo和Scord