Seismic Microzonation For Urban Planning and Vulnerability Assessment OF non-Engineered Struture in Earthquake Prone Area, Padang, Indonesia

Putra, Rusnardi Rahmad and Junji, Kiyono and Rijal, Fahmi and Syahril, Syahril (2017) Seismic Microzonation For Urban Planning and Vulnerability Assessment OF non-Engineered Struture in Earthquake Prone Area, Padang, Indonesia. In: Third International Conference on Science, Engineering & Environment (SEE), 13-16 November 2017, Australia.

[img]
Preview
Text
seismic microzonation ok baru.pdf

Download (2MB) | Preview

Abstract

Padang city is located at earthquake prone area, several powerful earthquakes have struck Padang during recent years, one of the largest of which was an M 7.6 event that occurred on September 30, 2009 and caused more than 1000 casualties. The basic purpose of seismic microzonation is to produce input for urban planning and to supply site specific ground motion data to be used for the assessment of the vulnerability of the non-structure houses stock. A very detailed geological and geotechnical studies were conducted to evaluate the variation of site characterization within the city of Padang. We performed single observations of microtremors at 110 sites in Padang. The results enabled us to estimate the site-dependent amplification characteristics of earthquake ground-motion. We also conducted a 12-site microtremor array investigation to gain a representative determination of the soil condition of subsurface structures in Padang. Based on soil characteristic in whole Padang, We simulated the recorded ground motion of earthquake 2009 to obtain ground motion whole Padang. This seismic microzonation is a parameter for vulnerability assessment to non-engineered houses. We conducted vulnerability assessment to non-engineered structure of houses stock to estimate current structure condition to face predicted earthquake event in near future. About 1400 non-engineered structure were assessed and interviewed. The residents received explanations for each item on the questionnaire from the interviewers, and answers were filled in directly on the answer sheets. This survey produced a map of the shaking intensity and houses’ vulnerability distribution in Padang. From the dispersion curve of microtremor array observations, the central business district of Padang corresponds to relatively soft soil condition with Vs 30 less than 400 m/s, the predominant periods due to horizontal vertical ratios (HVSRs) are in the range of 2.0 to 4.0 s, and 98% of houses in high risk due to predicted earthquake. These results enable produce clear information to Padang people including local government of Padang how to create a mitigation system to reduce earthquake risk.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > T Technology (General)
Divisions: Fakultas Teknik > Teknik Sipil dan Bangunan - D3
Depositing User: Mrs. Wiwi Sartika
Date Deposited: 08 Feb 2018 06:38
Last Modified: 14 May 2018 03:52
URI: http://repository.unp.ac.id/id/eprint/12654

Actions (login required)

View Item View Item