The impact of local soil class on the seismic behavior of a high-rise RC building

This study numerically examines the impact of different soil classes on the seismic behavior of a high-rise RC building.For this purpose, a symmetric-plan, 30-story building model with reinforced concrete (RC) shear walls was prepared.The structural system of the model included two E-shaped core shear walls connected with coupling beams, forming a dual structural system consisting of core shear walls and a moment-resisting RC frame.Subsequently, earthquake parameters were obtained considering two different soil classes.Finally, modal response spectrum analysis was conducted considering two different response behaviors corresponding to upper (tower) and lower (podium) sections to determine the seismic performance level based on Turkish Building Earthquake Code (TBEC) 2018 conditions.Consequently, the relationship between soil class and seismic effects on the structural behavior of a high-rise building was established through a finite element model.The comparison of analysis results indicates that when transitioning from the ZB to the ZC local soil class, the maximum increase in axial load occurred in the corner columns, while the greatest increases in shear force were observed in the link beams and frame beams.Additionally, the highest shear force increases in the outer facade beams were also noted.Moreover, the bending moment transferred to the core shear walls nearly doubled, with the maximum bending moments in the core walls occurring at the transfer floor.