Numerical study on seismic behaviour of reinforced concrete structures with steel brace and infill wall (original) (raw)

2018, Nucleation and Atmospheric Aerosols

The behaviour of the structure of reinforced concrete (RC) due to seismic load was studied numerically where RC structures of 2, 3, and 4 storey were modelled to reveal their seismic behaviour. Nonlinear static pushover analysis was also carried out to determine its performance. The structures were strengthened using steel frames, steel braces or infill walls with concentric openings. RC open frame structure (MF) was firstly designed in accordance with Indonesian Code, SNI 2847:2013. The MF model was then strengthened, particularly in the middle span, either with steel frame on surrounding beams and columns (MFF) or reinforced with X, A, or V steel bracing (BFX, BFA, and BFV). The bracing model was further added with steel frames (FBFX, FBFA, and FBFV). The MF was also reinforced with infill walls with concentric opening of 20%, 40%, and 60% (IF20, IF40, and IF60). From the results of the analyses, it can be concluded that the addition of bracing with and without steel frames and infill walls with concentric opening can stiffen the structures. Steel framed brace model was the most rigid one. The level of performance of the reinforced MF model using steel bracing with and without steel frames increased from Immediate Occupancy (IO) to Operational Level (B), but the level decreased into Collapse Prevention (CP) for the model with infill walls. The performance of RC reinforced with steel frames remained at Immediate Occupancy (IO) level.