Seismic capacity evaluation of the damaged reinforced concrete building during Palu earthquake 2018

Fajar Nugroho,S.-J Hwang,I.W Segara,A Hakam,L Comfort

doi:10.1051/e3sconf/202015605004

Fajar Nugroho, S.-J Hwang + Show 3 more

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https://doi.org/10.1051/e3sconf/202015605004

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Abstract

This paper presents an evaluation of the seismic capacity of the Dean Building of The Faculty of Social and Political Science of Tadulako University due to the Palu Earthquake 2018. The building was built in 2016 and went into use in 2017. The building is made from a reinforced concrete frame consisting of three floors and collapsed after the earthquake. Data for the analysis are taken from the Detail Engineering Design of the Dean Building of The Faculty of Social And Political Science of Tadulako University in 2015. Seismic capacity evaluated based on Standard for Seismic Evaluation of Existing Reinforced Concrete Buildings issued by the Japan Country. The analysis are done on the 1st-floor structure because the most significant sliding force happens on the first floor. Seismic capacity is invoked in the form of a link between the lateral strength and the ductility index. By using Japanese standards, the building's seismic capacity is relatively small in withstanding the earthquake load and collapsed the building. Based on observations in the field by conducting non-destructive testing using hammer tests, the concrete material had relatively low quality and a failure to connect the column beams by insufficiently reintegrating and resulted in a collapse of the building.

Highlights

IntroductionAlmost all Indonesian territory, such as Sumatera, Java, Bali, Nusa Tenggara, Sulawesi, and Papua, are prone to earthquakes followed by a tsunami
This study evaluated the seismic capacity of a reinforced concrete building 2 floors to without and by taking into account the influence of brick walls by applying a diagonal model strut to the brick wall
Another detail information on the building structure that required for calculation such as column size, column detail, reinforcement quality is obtained from detailed engineering design (DED) drawing of the Dean Building

Summary

Introduction

Almost all Indonesian territory, such as Sumatera, Java, Bali, Nusa Tenggara, Sulawesi, and Papua, are prone to earthquakes followed by a tsunami. In September 2018 magnitude 7,5 earthquake followed by a tsunami occurred in Palu, Central Sulawesi [2]. The Meteorology Climatology and Geophysics Agency of Indonesia (BMKG) records Donggala-Palu Earthquake occurring on September 28, 2018, at 06:02 p.m. WITA (Middle Indonesian Time) with hypocentre 10 km and magnitude 7,5. The earthquake that followed by the tsunami caused infrastructure damage and caused fatalities. As of October 21, 2018, The National Disaster Management Agency of Indonesia (BNPB) recorded 2.256 people died, 1.309 people were declared missing, 4.162 people were injured, and 223.751 people had been displaced at 122 areas. The financial loss due to the earthquakes, tsunamis, and liquefaction reached over 13,82 trillion rupiah [3]

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