DESIGN AND DAMAGE ANALYSIS USING NONLINEAR METHODS ON REINFORCED CONCRETE BUILDINGS DUE TO EARTHQUAKE SEQUENCES

• Main Author: Michael
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74140
• Institution: Institut Teknologi Bandung

Code-based design and performance-based design utilize seismic load inputs that may occur based on PSHA (Probabilistic Seismic Hazard Analysis) analysis and calculations. Typically, this analysis is conducted by applying ground motion adjusted to the target MCER (Maximum Considered Earthquake Response) spectra through spectrum matching. The analysis is performed on 11 pairs of independent ground motions, and the average values are taken. However, regulations do not require an analysis of earthquake sequences. Therefore, in the event of an aftershock, it is necessary to determine whether the building still has the capacity to withstand such aftershocks. The phenomenon where a building can survive the main earthquake but eventually collapses due to an aftershock has occurred several times. One example is the CTV building, which suffered damage from the earthquake in New Zealand on September 4, 2010, followed by an aftershock with a magnitude of 6.2 on February 22, 2011, resulting in the collapse of the building. Based on the above case example, it is necessary to determine whether the damage caused by aftershocks needs to be considered in the design process. Analyzing the impact of aftershocks requires nonlinear analysis. To assess the level of structural damage caused by earthquake sequences, a cumulative damage index will be used. The cumulative damage index models utilized are the Park & Ang (1985) cumulative damage index and the modified Park & Ang cumulative damage index presented by Huanjun Jiang (2013).