The structural performance concept of the bridge in Japan considers two levels of seismic performance which realizes elastic behavior under common earthquake then prevents the structure collapse and limits the structure damage under severe earthquake. Also, the behavior and the parameter of reinforced concrete (RC) column accompanied with friction device were determined successfully based on the experiment and numerical analysis. On the other hand, the problem of medium span bridge bearing support in the regions where to have extreme temperatures fluctuation is deterioration. It is triggered by the superstructure suppression which sustains thermal expansion, creeps, and shrinkages phenomena. This study proposes the structural system of integrated bridge pier with triple RC column accompanied by friction damper plus gap which substitutes the conventional bridge pier structural system. Numerical analysis is performed for this system with fiber element model. It shows that the proposed structure has an excellent performance not only under small deformation to allocate thermal expansion of the superstructure but also under seismic load. The structural simulations with di erent limit state of column location and the di erent yield strength of reinforcing steel configuration are conducted to get better structural cost-performance option.
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