Seismic Performance Assessment of Reinforced Concrete Moment-Resisting Frames with Shear Walls Reinforced by Shape Memory Alloy Bars

Shape Memory Alloy (SMA) reinforcing bars, due to their unique self-centering capability and high energy dissipation, can significantly enhance the seismic performance of structures located in high-seismic-risk regions. In reinforced concrete (RC) buildings, the combined use of Special Moment-Resisting Frames (SMRF) and Reinforced Concrete Shear Walls is a common lateral load–resisting system. Although the inherent ductility of SMRFs improves their seismic response, the influence of integrating SMA reinforcement within structural elements of such systems has not yet been comprehensively investigated. In this study, a ۱۲-story RC building located in a very high seismic hazard zone, consisting of an SMRF and RC shear walls, was modeled and analyzed in three different cases using various types of SMA reinforcing bars. The results indicated that the inclusion of SMA reinforcement led to an average reduction in total building weight by approximately ۰.۱۳%, a decrease in support moments by about ۱۰.۲۲%, and a reduction in peak interstory drift by nearly ۱۰.۴۲% compared to the reference model without SMA bars. These findings highlight the high efficiency of SMA reinforcement in enhancing seismic performance and reducing the vulnerability of RC structures.

کلیدواژه ها:

Shape Memory Alloy (SMA) ، Special moment-resisting frame ، Reinforced concrete shear wall ، Seismic Performance