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Equivalent Plane Truss Model Based on Finite Isoparametric Element(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2008年03期
Page:
108-114
Research Field:
Publishing date:
2008-09-20

Info

Title:
Equivalent Plane Truss Model Based on Finite Isoparametric Element
Author(s):
WU Fang-bo;  HAN Song;  SHANG Shou-ping;  ZHANG Yan-jun
School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China
Keywords:
finite element method;  plane stress element;  equivalent plane truss model;  isoparametric transformation;  RC structure
PACS:
TU375.5
DOI:
-
Abstract:
In order to solve the complexity of finit element method(FEM), embarking from the plane stress element in the elastic mechanics, infinite element method and finite element method were unioned, an equivalent plane truss model was proposed. Based on the equivalent of displacement between the plane stress element and the equivalent plane truss element, the equivalent element rigidity, equivalent section area of the truss bar and characteristic values of equivalent elastic module were analyzed. The element stiffness matrix, strain matrix and axis matrix of the equivalent truss model were built. Authors put forward the separate model of equivalent plane truss model, analyzed the common non-normal quadrilateral isoparametric element with the rebar, set up the isoparametric element stiffness matrix. A cantilever and a dam were researched, comparing the results which got from the equivalent plane truss model with that of finite element analysis software ANSYS 9.0. The results show that this model is feasible to analyze plane stress problem, it can satisfy the requirements of engineering precision. Meanwhile, the calculation model of the structure can be simplified, these adequately prove the scientificity of the equivalent plane truss model.

References:

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Memo

Memo:
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Last Update: 2008-09-20