Development of fragility curve due to the effect of tsunami force on existing building in Banda Aceh city

Zu Irfan,Abdullah Abdullah,Moch Afifuddin,A Rahman,Y Idris,I Rusydy,T Musa,H.A Haridhi,A Opdyke,A Suppasri,E Meilianda,Muksin Muksin,E Mas

doi:10.1051/e3sconf/202234002002

Abstract

Aceh is located on the Indian Ocean Coast which is very prone to Tsunamis, this is due to frequent large earthquakes due to Megatrust faults, such as those that occurred during the earthquake on December 26, 2004. Based on the 2012 Aceh earthquake, the Acehnese prefer horizontal evacuation to vertical evacuation [1]. In this case, many people in Banda Aceh do not believe in the strength of TVE buildings (distrust building). From this research, it it is possible for the Acehnese will do the same thing in the future when the tsunami occurs. Horizontal evacuation puts them at risk of traffic accidents so that they cannot reach a safe area in a short time, whereas through vertical evacuation they can reach the TVE of a building in a short time due to its proximity to settlements. When the earthquake and tsunami occured Banda Aceh in 2004, many buildings were destroyed due to the earthquake load and also the Tsunami load. For this problem, a vulnerability analysis of buildings that can be used as TVE buildings can be carried out. If an earthquake magnitude more than 7.0 Mw can cause a tsunami, the TVE building should be counted on the structural strength caused by the Tsunami waves. In this research, a hydrodynamic analysis will be carried out due to air pressure and collision which is a function of velocity and depth of flow and also the influence of drag and drift variables on the building.

Highlights

Aceh is located on the Indian Ocean Coast which is very vulnerable to Tsunami hazards, this is because large earthquakes often occur due to megatrust faults, such as what happened during the earthquake in 26 December 2004
The Indian Ocean coast is very vulnerable to Tsunamis [2], and Sumatra Island is a seismic gap area which has the potential for large-scale earthquakes [3]
Goto et al found that during the earthquake that occurred on April 11, 2012, in Banda Aceh, in 2012 it did not cause a Tsunami, 78% of refugees were stuck in traffic

Summary

Introduction

Aceh is located on the Indian Ocean Coast which is very vulnerable to Tsunami hazards, this is because large earthquakes often occur due to megatrust faults, such as what happened during the earthquake in 26 December 2004. It is necessary to assess the vulnerability of the building to forces due to earthquake and tsunami loads. The Indian Ocean coast is very vulnerable to Tsunamis [2], and Sumatra Island is a seismic gap area which has the potential for large-scale earthquakes [3]. The survey found that vertical evacuation reduced evacuation time: 71% of those evacuated to a tall building or mosque reached this destination within 20 minutes (this rose to about 91% at 40 minutes), while only ~15% of those who evacuated horizontally reach their destination within 20 minutes (this rises to only 35% at 40 minutes) [4].

Tsunami loads

Fragility curve

Findings

Result and discussion