基于空间等效桁架单元方法的钢筋混凝土结构非线性分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
针对传统有限元分析的复杂性以及裂缝描述不准确等缺点,从空间应力单元出发,结合平面等效桁架单元的研究方法,提出了一种空间等效桁架单元;基于空间等效桁架单元和空间应力单元刚度等效的原则,推导了等效后的单元刚度矩阵、杆件截面面积和杆件轴力计算公式,探讨了空间等效桁架单元应用于钢筋混凝土结构非线性分析的相关问题;借助ANSYS 10.0采用该方法对一桥墩结构进行计算分析,并与采用平面等效桁架单元方法和试验方法所得结果进行了对比。结果表明:采用该方法对钢筋混凝土结构进行分析能够满足工程精度要求,并且能够准确描述裂缝的开展。
In order to deal with complexity of traditional finite element analysis and inaccurate description of cracks,a kind of space equivalent truss element was proposed based on space stress element and plane equivalent truss element method.Based on the principles of stiffness equivalence for space equivalent truss element and space stress element,the equivalent element stiffness matrix,the equivalent sectional area of member bar and the calculation formula of axial force were derived.The problems related to space equivalent truss element used in nonlinear analysis of reinforced concrete(RC)structure were discussed.A bridge pier structure was analyzed by space equivalent truss element with ANSYS 10.0,and the analysis results were compared with the results of plane equivalent truss element and test.The results show that the proposed method is feasible to analyze RC structure,and can satisfy the requirements of engineering precision and accurately describe the crack development.
引文
[1]NGO D,SCORDELIS A C.Finite Element Analysis of Reinforced Concrete Beams[J].ACI Journal Proceedings,1967,64(3):152-163.
    [2]王传志,过镇海,张秀琴.二轴和三轴受压混凝土的强度试验[J].土木工程学报,1987,20(1):15-27.WANG Chuan-zhi,GUO Zhen-hai,ZHANG Xiu-qin.Experimental Investigation of Concrete Strength Under Biaxial and Triaxial Compressive Stresses[J].China Civil Engineering Journal,1987,20(1):15-27.
    [3]吕西林,金国芳,吴晓涵.钢筋混凝土结构非线性有限元理论与应用[M].上海:同济大学出版社,1997.LU Xi-lin,JIN Guo-fang,WU Xiao-han.Nonlinear FEM Theory and Application of Reinforced Concrete Structures[M].Shanghai:Tongji University Press,1997.
    [4]HIRAISHI H.Evaluation of Shear and Flexural Deformations of Flexural Type Shear Walls[J].Bulletin of the New Zealand National Society for Earthquake Engineering,1984,17(2):135-144.
    [5]吴方伯,丁先立,周绪红,等.采用等效平面桁架单元对钢筋混凝土结构进行非线性分析[J].建筑结构学报,2005,26(5):112-117.WU Fang-bo,DING Xian-li,ZHOU Xu-hong,et al.Study on the Nonlinear Analysis of Reinforced Concrete Structures by Equivalent Plane Truss Element Method[J].Journal of Building Structures,2005,26(5):112-117.
    [6]秦东.钢筋混凝土桥墩横向地震破坏与倒塌的计算机仿真[D].上海:同济大学,2000.QIN Dong.Computer Simulation for Transverse Earthquake Damage and the Collapse of Reinforced Concrete Bridge Pier[D].Shanghai:Tongji University,2000.
    [7]江见鲸.钢筋混凝土结构非线性有限元分析[M].西安:陕西科学技术出版社,1994.JIANG Jian-jing.Nonlinear Finite Element Analysis of Reinforced Concrete Structure[M].Xian:Shaanxi Science and Technology Press,1994.
    [8]康清梁.钢筋混凝土有限元分析[M].北京:中国水利水电出版社,1996.KANG Qing-liang.Finite Element Analysis of Reinforced Concrete Structure[M].Beijing:China Water&Power Press,1996.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心