Finite element modeling of corroded RC beams using cohesive surface bonding approach

Mohammed A. Al-Osta; Hamdi A. Al-Sakkaf; Alfarabi M. Sharif; Shamsad Ahmad; Mohammad H. Baluch

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자료유형: 학술저널

저자정보: Mohammed A. Al-Osta (King Fahd University of Petroleum & Minerals) Hamdi A. Al-Sakkaf (King Fahd University of Petroleum & Minerals) Alfarabi M. Sharif (King Fahd University of Petroleum & Minerals) Shamsad Ahmad (King Fahd University of Petroleum & Minerals) Mohammad H. Baluch (King Fahd University of Petroleum & Minerals)

저널정보: 한국계산역학회 Computers and Concrete, An International Journal Computers and Concrete, An International Journal Vol.22 No.2

발행연도: 2018.1

수록면: 167 - 182 (16page)

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The modeling of loss of bond between reinforcing bars (rebars) and concrete due to corrosion is useful in studying the behavior and prediction of residual load bearing capacity of corroded reinforced concrete (RC) members. In the present work, first the possibility of using different methods to simulate the rebars-concrete bonding, which is used in three-dimensional (3D) finite element (FE) modeling of corroded RC beams, was explored. The cohesive surface interaction method was found to be most suitable for simulating the bond between rebars and concrete. Secondly, using the cohesive surface interaction approach, the 3D FE modeling of the behavior of non-corroded and corroded RC beams was carried out in an ABAQUS environment. Experimental data, reported in literature, were used to validate the models. Then using the developed models, a parametric study was conducted to examine the effects of some parameters, such as degree and location of the corrosion, on the behavior and residual capacity of the corroded beams. The results obtained from the parametric analysis using the developed model showed that corrosion in top compression rebars has very small effect on the flexural behaviors of beams with small flexural reinforcement ratio that is less than the maximum ratio specified in ACI-318-14 (singly RC beam). In addition, the reduction of steel yield strength in tension reinforcement due to corrosion is the main source of reducing the load bearing capacity of corroded RC beams. The most critical corrosion-induced damage is the complete loss of bond between rebars and the concrete as it causes sudden failure and the beam acts as un-reinforced beam.

참고문헌 (46)

참고문헌 신청

Abaqus Manual, A. / 2013 / Abaqus Analysis User's Manual version 6.13 / Dassault Systemes Simulia Corp.

2014 / ACI committee 318, Building Code Requirements for Structural Concrete and Commentary, ACI 318-14

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