Numerical modeling of rebar buckling in reinforced concrete members using truss analogy
Reinforced concrete (RC) structures in earthquake prone regions are designed to achieve the seismic performance objectives. In end regions of RC members, longitudinal reinforcing bars may develop buckling due to high compressive strains under reversed cyclic loadings. The performance based assessmen...
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| Format: | Article |
| Language: | English |
| Published: |
Pamukkale University
2018-06-01
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| Series: | Pamukkale University Journal of Engineering Sciences |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/pub/pajes/issue/38095/437111 |
| Summary: | Reinforced
concrete (RC) structures in earthquake prone regions are designed to achieve
the seismic performance objectives. In end regions of RC members, longitudinal
reinforcing bars may develop buckling due to high compressive strains under
reversed cyclic loadings. The performance based assessment for RC structures
should rely on analytical models which can account for the effect of rebar
buckling on the nonlinear response. This study extends a previously proposed
nonlinear truss modeling approach for modeling RC elements whose response is
affected by rebar buckling. Nonlinear truss model includes diagonal truss
elements accounting for biaxial effects in compression and tension stiffening
for concrete elements in the horizontal and vertical directions. The truss
elements representing reinforcing steel are provided with a uniaxial material
model which can explicitly account for inelastic buckling and fracture of
rebars. The modeling approach is validated with experimental test results on
one RC beam considering mesh size effects on the response. Numerical model
computed strength degradation in moment-drift ratio response of the beam in
accordance with the experimental results. |
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| ISSN: | 1300-7009 2147-5881 |