混凝土拱坝稳定分析的理论与方法研究-水工结构工程专业论文.docxVIP

Abstract111e Abstract 111e arch dam stability is the key issue in arch dam design and analysis．This paper iS based on ANSYS，a big FEM simulation software．Based on ANSYS．an equivalent stress calculation program is designed，and a visual post-processing techniques for ANSYS results are discussed．The emphasis iS put on the abutment stability of the arch dam and the dam body upper—sliding stability．The main contents are as follows： 1．The basic theories and methods and their actualize techniques in ANSYS are introduced，which are used for elastic．plastic and nonlinear calculation for rock engineering and hydrostmcture engineering FEM analysis．To simulate the arch dam body concrete and the abutment rock，faults and the big fractures，the elements types and the material types in ANSYS are introduced and discussed． 2．The stress concentration will present when there are abrupt change of materials or geometry in FEM analysis．SO the results Can’t be used into design directly．To resolve this problem．the equivalent stress theories and their actualize techniques are discussed．An equivalent stress calculation program iS programmed，which is programmed using APDL language of ANSYS，then through the analysis of an example．it iS proved to be a correct and e瓶cient way． 3．The archdam body upper-sliding stability problem is payed more and more attention in recent archdam stability analysis．In this paper,it iS researched too．The upper-sliding calculation theories are discussed，and an assurance factor based on these theories is get．Through all example，it is proved to be on the safe side．A FEM analysis model based on ANSYS iS present．and it is discussed through an example，too．Through FEM method and也e rigid body ultimate equilibrium method，two assurance factor are get．The two results are compared and analyzed． 4．The joint develop techniques based on ANSYS and AutoCAD are discussed．The visual ways and techniques of the automatic reduction for archdam results are discussed too．To pr