Seismic Damage Analysis of Reinforced Concrete Frame of Public Buildings in Ipoh Subjected to Acheh Earthquake Event

Abstract

This study addresses the vulnerability of public buildings in Malaysia subjected to earthquakes from Sumatra and Philippines. A case study that has been conducted on medium-rise reinforced concrete buildings which are mostly categorized as moment resisting frames. Block K (Federal Reserve Unit), Islamic Complex, and Police Quarters were chosen as main models for this study. The building was analyzed using Finite Element Modeling (FEM) under variety of earthquake intensities from Time History Analysis (THA) considering low to medium earthquake intensities. The yield point at beam-column connections was analyzed to determine the damage index and damage level of the building. The performance of critical frame reinforced concrete building when subjected to earthquake motion (Near source: Acheh) was addressed. The buildings evaluated were subjected to low-intensity earthquakes. There are different damage levels that affect the frames when different intensities are applied by looking at structural and non-structural damage. The level of the damage state (minor, moderate, major, collapse levels) has been defined as well. As a result, the high-rise building developed plastic hinge due to the earthquake intensity of 0.05 g and have damage indexes in the range 0.050 (light damage level) to 1.0 (collapse). A greater damage index means that the members yield earlier and the plastic rotation is larger and vice versa. As for the result, the damage to columns is light, the damage level of most columns is “medium destruction,” and the performance of the high-performance concrete is satisfactory.