Seismic Fragility of Tall Concrete Wall Structures in Malaysia under Far-Field Earthquakes

Siti Aisyah,Mohammadreza Vafaei,Kotaiba Aljwim,Sophia C Alih

doi:10.2174/1874149501913010140

Abstract

Introduction: In recent years, the seismic vulnerability of structures in Malaysia has attracted the attention of researchers mainly because the majority of existing structures have not been designed for seismic actions. In this study, seismic vulnerability of tall concrete wall buildings has been investigated through the development of seismic fragility curves. Methods: Two 25-story tall buildings with similar plans but with the different number of parking levels were analyzed through the incremental dynamic analysis. The tall buildings were excited by 15 far-field earthquakes, and their inter-story drift demands and capacities were estimated. Nonlinear response of beams and columns was simulated through the lumped plasticity model. The inelastic response of concrete walls was taken into account through the use of distributed plasticity fibre-based elements. Results and Conclusion: The obtained results indicated that the probability of exceeding minor damage to the tall concrete wall buildings located in the Kuala Lumpur city was around 55%. However, the probability of collapse of these structures in the same city was less than 15%.

Highlights

In recent years, the seismic vulnerability of structures in Malaysia has attracted the attention of researchers mainly because the majority of existing structures have not been designed for seismic actions
P(DS|SI) is the conditional probability of exceeding the Damage State (DS) for the given seismic intensity (SI). π is the standard normal distribution; γC is the natural logarithm of the median of drift capacity for a particular damage state; γD|SI is the natural logarithm of calculated median demand drift given the seismic intensity from the best fit power law line
This study focused on the development of seismic fragility curves for tall concrete wall buildings in Malaysia

Summary

Introduction

The seismic vulnerability of structures in Malaysia has attracted the attention of researchers mainly because the majority of existing structures have not been designed for seismic actions. Seismic vulnerability of tall concrete wall buildings has been investigated through the development of seismic fragility curves. Tall buildings that have been constructed in major cities in Malaysia ranged from 20 to 50 stories and are used for office or residential purposes. Concrete walls are the main lateral force resisting system for the majority of tall buildings in Malaysia. (1), at the lower level of tall buildings, a few stories are used as the parking area. These stories are made by momentresisting frames so that enough open area is provided for cars to maneuver and park.

Methods

Results

Conclusion