Seismic Performance of Multi-Story Reinforced Concrete Frame Structures Due to Vertical and Horizontal Irregularities
DOI:
https://doi.org/10.18196/st.v28i1.25184Keywords:
Vertical Irregularity, Multi-Story Building, STERA 3D, Time History, Seismic Performance.Abstract
The irregularities in structures affect their seismic performance, particularly in earthquake-prone areas, such as Indonesia. This study evaluates the seismic performance of multi-story reinforced concrete frame structures with vertical and horizontal irregularities. The building has 12 floors and features two different plans and vertical irregularities, namely the L and H buildings. Each horizontal irregularity has five variations of vertical irregularity. Th-e frame structure is analyzed using STERA 3D software for non-linear dynamic time-history analysis. El-Centro, Kobe, and Parkfield earthquake time history data were used in this study. The seismic behavior investigated in this study consisted of base shear force, lateral deformation, stiffness, displacement, drift ratio, maximum acceleration, and capacity curve. Numerical simulation results indicate that each model performs differently when subjected to the same seismic load and material properties. It can be concluded that vertical irregularity significantly affects the seismic performance of high-rise reinforced concrete structures. The maximum shear force with vertical irregularity is 133% higher for the L-Shape and 169% higher for the H-Shape compared to a building without vertical irregularities.
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