Lalu Makrup
Jurusan Teknik Sipil, Fakultas Teknik Sipil Dan Perencanaan, Universitas Islam Indonesia, Yogyakarta, Indonesia

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Journal : Teknisia

ANALISIS HAZARD GEMPA DKI JAKARTA METODE PROBABILISTIK DENGAN PEMODELAN SUMBER GEMPA 3 DIMENSI Yunalia Muntafi; Widodo Pawirodikromo; Lalu Makrup
TEKNISIA Vol. XX, No. 2, November 2015
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

History records that Jakarta as the capital of Indonesia ever rocked by a devastating earthquake in 1699, 1780, 1883 and 1903, resulting in loss of physical, mental and material. The existence of several active faults around Jakarta potentially be the source of the earthquake that shook Jakarta. Therefore, the analysis of seismic hazard for Jakarta area is needed. The study was conducted by the method of Probabilistic Seismic Hazard Analysis (PSHA) with 3D modeling of seismic source and latest attenuation equations (Next Generation Attenuation) in accordance with the method used in the manufacture of the latest earthquake map (Earthquake Hazard Map of Indonesia 2010). The aims of this research are to (1) conduct hazard analysis seismic probabilistic as a reference value of the intensity of the hazard seismicity, (2) analyze deagragasi as early determinant of modification recording time history seismic acceleration corresponding to Jakarta bedrock and (3) analyze the spectral matching which then carried the ground motion design for Jakarta. The results of seismic hazard analysis shows that maximum acceleration at bedrock (PGA) for the Jakarta area with 500-year return period amounted to 0.236 g still in the range of PGA Jakarta by Indonesian Earthquake Hazard Map of latest ISO 1726-2012 (0.20g-0.25g). This value is close to the value of the Hutapea’s research results (2009), amounting to 0.239g. However, it is higher than the proposed PGA of Irsyam et al (2008) which amounted to 0.20g, and lower than the value of PGA on Indonesian earthquake map published by the USGS in which Jakarta was in the range of 0.245g - 0.326g. Based on the deagregation analysis, obtained two sets of real-time earthquake data, namely time history of Kocaeli earthquake in 1999 and Landers earthquake in 1992 to present megathrust and shallow crustal earthquake source, then by spectral matching analysis, obtained two synthetic ground motions for each seismic source mechanisms in the period of 0.2 sec and 1.0 sec for Jakarta.
ANALISIS PERCEPATAN TANAH PERMUKAAN DI WILAYAH RIAU DENGAN METODE PSHA Elvis Saputra; Lalu Makrup; Fitri Nugraheni; Widodo .
TEKNISIA Vol. XXV, No. 1, Mei 2020
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol25.iss1.art5

Abstract

The western region of Sumatra Island is an area located on the world's active plate margin, which is reflected by the high frequency of earthquake events. An effort to reduce the impact of the earthquake disaster is to conduct a seismic hazard analysis. There have been many studies on seismic hazard in the West Sumatra region. Still, in the surrounding areas such as Riau, which borders directly with the territory, there has never been an earthquake hazard mapping micro zonation. This study aims to determine the value of surface acceleration for various districts or cities in Riau Province, by knowing the amount of surface acceleration, it will be able to identify the areas that have a relatively high level of earthquake risk. The Surface acceleration analysis is done by using the probabilistic Seismic hazard method (PSHA) using The SR Model software. The results of this study are obtained from 12 districts or cities located in Riau in which three areas have a high value of surface acceleration, those are Rokan Hulu regency, Kampar regency), and Kuantan Singingi regency). The amount of surface acceleration in Riau province in the 0.0 second period or peak ground acceleration (PGA) is in the range 0.097 - 0.78 g, then in the 0.2 second period the surface acceleration is in the range 0.204 – 1.943 g, and in the 1 second period of the surface acceleration is in the range 0.176 - 1.155 g.
EVALUASI STRUKTUR GEDUNG FAKULTAS HUKUM UNIVERSITAS ISLAM INDONESIA YOGYAKARTA BERDASARKAN PERCEPATAN GEMPA YANG DIHITUNG SECARA PROBABILISTIK Wisnu Erlangga; Lalu Makrup; Malik Musthofa; Suharyatmo
TEKNISIA Vol 27 No 1 (2022): Teknisia
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol27.iss1.art4

Abstract

Earthquake shocks generally cause the biggest shocks in building structures. Earthquake waves, generated by an earthquake event, are the main cause of this shaking. A new building of the Faculty of Law, Islamic University of Indonesia, was selected for this research to evaluate the effect of earthquake shaking on the structural response. A developed time history-based artificial earthquake ground motion was used in the structural analysis. Furthermore, the time history was developed based on spectral matching with target spectra derived from a probabilistic seismic hazard analysis. This analysis results in the building structure's seismic response, which is then evaluated based on the parameters set by the earthquake standards/regulations for buildings. This building is relatively safe against design earthquake shocks based on the results.