地下箱涵有限元结构分析
发布时间：2018-09-06 08:56
【摘要】：涵洞是一种应用广泛的地下建筑物，属于隐蔽工程，在国际上有生命线工程之称。钢筋混凝土箱涵作为水利工程中占据相当数量的一种涵洞类型，其结构设计尤为重要。 本文介绍了有限元方法进行箱涵结构计算的相关理论，总结概括了ANSYS中用到过的内力计算方法。借助大型通用有限元软件ANSYS，对紫金湖引水工程中的引水暗涵进行了三维实体有限元模型线性分析和二维梁单元模型模拟分析，并对钢筋混凝土箱涵进行非线性有限元分析，所做的主要研究工作如下： （1）介绍了ANSYS有限单元方法的原理及分析步骤，以及ANSYS用于箱涵结构分析的相关技术理论。 （2）总结了ANSYS求解实体结构内力的方法。并通过一个简支梁实例对实体单元模型内力求解的几种方法进行验证和优缺点分析。 （3）用ANSYS软件对紫金湖引水暗涵建立三维空间实体模型，并对三维有限元模型进行有水工况和无水工况下的计算分析，并比较分析不同工况下箱涵应力变形成果，确定控制工况为无水工况。基于APDL语言，，对ANSYS进行二次开发，编制内力求解批命令流，对无水工况的应力结果进行积分等运算，逐个求取箱涵各部件各部位的内力。 （4）分别使用结构力学方法和ANSYS梁单元有限元方法计算了紫金湖箱涵在控制工况下的内力，并对这几种方法得到的内力结果进行了比较分析，根据控制截面的内力成果进行配筋，对配筋成果也进行了比较分析。 （5）根据配筋结果，建立了钢筋混凝土箱涵有限元模型，进行了非线性有限元分析，验证配筋结果的可靠性。
[Abstract]:Culvert is a widely used underground building, which belongs to concealed engineering and is known as lifeline project in the world. Reinforced concrete box culvert is a kind of culvert in water conservancy engineering, and its structure design is very important. This paper introduces the theory of box culvert structure calculation by finite element method and summarizes the internal force calculation method used in ANSYS. In this paper, linear analysis of three-dimensional solid finite element model and simulation of two-dimensional beam element model are carried out for the diversion hidden culvert in Zijin Lake water diversion project with the aid of ANSYS, and nonlinear finite element analysis of reinforced concrete box culvert is carried out. The main research work is as follows: (1) the principle and analysis steps of ANSYS finite element method and the relevant technical theory of ANSYS used in box culvert structure analysis are introduced. (2) the method of ANSYS to solve the internal force of solid structure is summarized. Several methods for solving internal force of solid element model are verified and analyzed by a simple supported beam example. (3) Three-dimensional solid model of Zijin Lake water diversion hidden culvert is established by ANSYS software. The three-dimensional finite element model is calculated and analyzed under the condition of water and anhydrous, and the results of stress and deformation of box culvert under different working conditions are compared and analyzed, and the control condition is determined as anhydrous condition. Based on APDL language, the second development of ANSYS is carried out, the internal force is programmed to solve the batch command flow, and the stress results of anhydrous working condition are integrated. The internal forces of each part of the box culvert are calculated one by one. (4) the internal forces of the Zijin Lake box culvert under the control condition are calculated by using the structural mechanics method and the finite element method of the ANSYS beam element respectively. The results of internal forces obtained by these methods are compared and analyzed. According to the results of internal forces of the control section, the results of reinforcement are compared and analyzed. (5) according to the results of reinforcement, The finite element model of reinforced concrete box culvert is established and the nonlinear finite element analysis is carried out to verify the reliability of the reinforcement results.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U449.82
本文编号：2225846
[Abstract]:Culvert is a widely used underground building, which belongs to concealed engineering and is known as lifeline project in the world. Reinforced concrete box culvert is a kind of culvert in water conservancy engineering, and its structure design is very important. This paper introduces the theory of box culvert structure calculation by finite element method and summarizes the internal force calculation method used in ANSYS. In this paper, linear analysis of three-dimensional solid finite element model and simulation of two-dimensional beam element model are carried out for the diversion hidden culvert in Zijin Lake water diversion project with the aid of ANSYS, and nonlinear finite element analysis of reinforced concrete box culvert is carried out. The main research work is as follows: (1) the principle and analysis steps of ANSYS finite element method and the relevant technical theory of ANSYS used in box culvert structure analysis are introduced. (2) the method of ANSYS to solve the internal force of solid structure is summarized. Several methods for solving internal force of solid element model are verified and analyzed by a simple supported beam example. (3) Three-dimensional solid model of Zijin Lake water diversion hidden culvert is established by ANSYS software. The three-dimensional finite element model is calculated and analyzed under the condition of water and anhydrous, and the results of stress and deformation of box culvert under different working conditions are compared and analyzed, and the control condition is determined as anhydrous condition. Based on APDL language, the second development of ANSYS is carried out, the internal force is programmed to solve the batch command flow, and the stress results of anhydrous working condition are integrated. The internal forces of each part of the box culvert are calculated one by one. (4) the internal forces of the Zijin Lake box culvert under the control condition are calculated by using the structural mechanics method and the finite element method of the ANSYS beam element respectively. The results of internal forces obtained by these methods are compared and analyzed. According to the results of internal forces of the control section, the results of reinforcement are compared and analyzed. (5) according to the results of reinforcement, The finite element model of reinforced concrete box culvert is established and the nonlinear finite element analysis is carried out to verify the reliability of the reinforcement results.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U449.82
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