Study on an Application of a Buckling-Restrained Braced Frames System for Educational Building

This paper presents a comparison study on the application of the Buckling Restrained Braced Frame (BRBF) seismic resistance system to a 12-floor educational building in Surabaya, Indonesia. Due to the high seismic risk in Surabaya, educational buildings require reliable seismic resistance systems, and the BRBF system is one such system. The model of the existing building was built using a reinforced concrete moment-resistance frame (MRF), with a concrete shear wall as the added seismic resistance system. The modified model consists of a steel structure with a BRBF system, and Rectangular Concrete Filled Tube (RCFT) column were analyzed using a structural analysis program. The BRBF model was compared with the existing building model. Several aspects compared to both models resulted in different values for the natural period, mass participation, static and dynamic base shear, and story drift. For the natural period, the BRBF model yielded higher T values on both the orthogonal direction. The 90% mass participation requirement was fulfilled in the 8^th mode of the BRBF model; then, the existing structure model fulfilled the requirement in the 19^th mode. Both the static and dynamic base shear values of the existing structure model were higher than those of the BRBF model. For story drift, both structures satisfy the drift limit, with a higher value for the BRBF model than for the existing structure model. Further, it was found that the weight of the BRBF model is 40% less than that of the existing structure. Therefore, the foundation requirements of the BRBF model could be 55% less than those of the existing structure. This study is important for ensuring that the BRBF is a reliable option for achieving SDGs achieved by creating sustainable cities and communities by built disaster resilient infrastructure.