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Uniaxial Concrete Constitutive Model for ABAQUS Beam Element(PDF)

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

Issue:
2018年05期
Page:
194-202
Research Field:
Publishing date:

Info

Title:
Uniaxial Concrete Constitutive Model for ABAQUS Beam Element
Author(s):
WANG Qiang;  CHANG Kai;  HOU Kang-kang;  LU Jiong;  LIU Lin
School of Civil Engineering, Shenyang Jianzhu University
Keywords:
concrete constitutive model;  design code;  beam-column member;  hysteresis behavior;  user material subroutine
PACS:
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DOI:
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Abstract:
In order to accurately simulate the hysteresis behavior of reinforced concrete (RC) column-beam member, the concrete constitutive relations in Code for design of concrete structures (GB 50010—2010) was supplemented and amended. By using the originorientedmodel and tensile stressstrain curve shifted with the residual strain of compression, the hysteretic rules for tension loading and unloading as well as reversal between tension and compression were supplemented. The confinement parameter λt based on volume stirrup ratio, the confinement effects of the stirrup were considered in the compression envelop. The arithmetic of additional strain in the concrete constitutive relation in Code for design of concrete structures (GB 50010—2010) was also modified, so that the loading and unloading modulus of compression could reflect the unrecoverable characteristic of compression damage of concrete with cyclic loading. The UMAT and VUMAT concrete user subroutines in software ABAQUS were developed respectively, and attached to the implicit and explicit dynamic analyses of concrete constitutive model of beam element. The hysteretic performance of RC columns under cyclic loading was numerically simulated. The results show that the numerical simulation results of the model are in good agreement with the experimental results of the pseudo-static tests. The established model can meet the demand for analyzing the nonlinear performance of RC column-beam element under the multiaxial loading conditions.

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Last Update: 2018-09-03