TY - JOUR
T1 - Numerical simulation of reinforced concrete beam/column failure considering normal-shear stress interaction
AU - Long, X.
AU - Bao, J. Q.
AU - Tan, K. H.
AU - Lee, C. K.
PY - 2014/9/1
Y1 - 2014/9/1
N2 - Fibre beam elements have vast applications to simulate the behaviour of reinforced concrete beam/column members. If normal-shear interaction is ignored, separated normal and shear constitutive laws are usually used in fibre beam elements, which is invalid to simulate shear failure in beam/column members with small or medium shear span-to-depth ratios. In this paper, a fibre beam element is treated as a degenerated solid element, and a unified concrete constitutive model is proposed for the degenerated solid element. Different from the separated constitutive models, the unified concrete constitutive model incorporates normal and shear behaviour based on three dimensional stress-strain states and, thus, normal-shear interaction is naturally considered. Moreover, compressive failure, shear failure and tensile failure are accounted for. Therefore, beam/column members with a wide range of shear span-to-depth ratios can be simulated with the degenerated solid element considering normal-shear interaction. Lastly, a variety of examples are presented to demonstrate the applicability and reliability of the proposed method by comparing numerical predictions with experimental results.
AB - Fibre beam elements have vast applications to simulate the behaviour of reinforced concrete beam/column members. If normal-shear interaction is ignored, separated normal and shear constitutive laws are usually used in fibre beam elements, which is invalid to simulate shear failure in beam/column members with small or medium shear span-to-depth ratios. In this paper, a fibre beam element is treated as a degenerated solid element, and a unified concrete constitutive model is proposed for the degenerated solid element. Different from the separated constitutive models, the unified concrete constitutive model incorporates normal and shear behaviour based on three dimensional stress-strain states and, thus, normal-shear interaction is naturally considered. Moreover, compressive failure, shear failure and tensile failure are accounted for. Therefore, beam/column members with a wide range of shear span-to-depth ratios can be simulated with the degenerated solid element considering normal-shear interaction. Lastly, a variety of examples are presented to demonstrate the applicability and reliability of the proposed method by comparing numerical predictions with experimental results.
KW - 3D fibre beam element
KW - Normal-shear interaction
KW - RC beam-column members
KW - Shear failure
KW - Unified concrete plasticity model
UR - http://www.scopus.com/inward/record.url?scp=84901609120&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2014.05.011
DO - 10.1016/j.engstruct.2014.05.011
M3 - 文章
AN - SCOPUS:84901609120
SN - 0141-0296
VL - 74
SP - 32
EP - 43
JO - Engineering Structures
JF - Engineering Structures
ER -