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Mechanics Model for Simulating RC Hinges under Reversed Cyclic Loading.

Ahmad Azim Shukri1, Phillip Visintin2, Deric J Oehlers3

  • 1Department of Civil Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia. ahmadazimshukri@gmail.com.

Materials (Basel, Switzerland)
|August 5, 2017
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Summary
This summary is machine-generated.

This study introduces a new displacement-based method to predict reinforced concrete (RC) hinge behavior under cyclic loads. The approach accurately models partial interaction, crucial for seismic and blast resistance.

Keywords:
RC beamsconcrete softeningcyclic loadinghinge lengthtension stiffening

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Area of Science:

  • Structural Engineering
  • Materials Science

Background:

  • Predicting reinforced concrete (RC) hinge behavior under severe cyclic loads (earthquakes, blasts) is critical for structural safety.
  • Existing strain-based methods struggle to simulate localized partial interaction (PI) behaviors in RC hinges.
  • PI in tension governs crack behavior and tension stiffening; PI in compression dictates concrete softening wedge formation.

Purpose of the Study:

  • To develop a displacement-based segmental moment rotation (M/θ) approach for RC hinges.
  • To directly simulate localized partial interaction (PI) behaviors in both tension and compression regions.
  • To create a novel partial interaction model for the reinforcement-concrete load-slip relationship.

Main Methods:

  • Development of a displacement-based segmental moment rotation (M/θ) analysis.
  • Formulation of a partial interaction (PI) model for reinforcement-concrete bond.
  • Simulation of localized slip behaviors in tension and compression zones of RC hinges.

Main Results:

  • The proposed segmental approach directly simulates PI behaviors in RC hinges.
  • A new model accurately predicts the tension stiffening load-slip response.
  • The method enhances the prediction of M/θ response under cyclic loading.

Conclusions:

  • The displacement-based segmental M/θ approach effectively captures RC hinge PI behaviors.
  • This method offers a more direct simulation compared to empirical factors in strain-based approaches.
  • The developed PI model is essential for accurate prediction of RC structure response to cyclic events.