Earthquake vulnerability assessment of the 6.5 Mw Pidie Jaya earthquake: Analytical-based fragility curves

Adrian Ulza,Yunita Idris,A Rahman,I Rusydy,T Musa,H.A Haridhi,Y Idris,A Suppasri,Muksin Muksin,E Mas,E Meilianda,A Opdyke

doi:10.1051/e3sconf/202234002008

Abstract

Nearly all residential houses were damaged due to 6.5 Mw earthquake in Pidie Jaya, 2016. The state of damage can be slight, moderate, and even can be extensive which lead to the collapsing. The confined masonry structure, which commonly found in Aceh, especially for housing construction, were seemingly prone to the extensive earthquake excitation. In this paper, analytical-based fragility curves are employed to the typical house structure. To account various uncertainty, 32 ground motion records are considered in the analysis. Based on the results, the fragility curve could render different interpretation if different definition of damage intensities is used.

Highlights

In the aftermath of the 6.5 Mw earthquake in Pidie Jaya Regency, Indonesia, severe damages are apparent in most of the buildings, and not to mention that several buildings are completely collapsed to the ground
Since most of the residential houses in Aceh province are quite typical to the damaged confined masonry that found in Pidie Jaya, its liability is certainly compromised, and in due course, the vulnerability of such structural system is pertinent to be investigated
Confined masonry is a non-engineered structural system, which favourably chosen as typical house construction in Indonesia and mostly in developing countries, by virtue of its material availability, construction practicality, and relatively low-cost compared to the engineered structural system, such as Reinforced Concrete Frame with Masonry Infills (RCFMI)

Summary

Introduction

In the aftermath of the 6.5 Mw earthquake in Pidie Jaya Regency, Indonesia, severe damages are apparent in most of the buildings, and not to mention that several buildings are completely collapsed to the ground. Since most of the residential houses in Aceh province are quite typical to the damaged confined masonry that found in Pidie Jaya, its liability is certainly compromised, and in due course, the vulnerability of such structural system is pertinent to be investigated. Based on the experimental study conducted by Sari et al [1], it can be observed that the diagonal crack was seemed on the specimen which has similar typology and structural configuration with typical housing in Pidie Jaya, Aceh, meaning that the confined masonry has the in-plane diagonal strut action, similar with RCFMI. The compressive strength of concrete is based on the average results of in-situ non-destructive test that is taken on field survey on several houses Other material properties, such as brick masonry and reinforcement bar can be determined by the typical material characteristics in Aceh. To investigate the vulnerability of structural model due to the variability of earthquake excitations, 32 strong ground motion records are considered, in which based on PEER NGA-West Database [10], and enlisted on Table 2

32 Darfield New Zealand 2010

Conclusion

Analysis Procedure for Estimating Seismic