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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Teknisia AGREGAT
Lalu Makrup
Jurusan Teknik Sipil, Fakultas Teknik Sipil Dan Perencanaan, Universitas Islam Indonesia, Yogyakarta, Indonesia
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Deagregasi Hazard Dan Rekomendasi Ground Motion Sintetik Di Provinsi Riau Elvis Saputra; Lalu Makrup
AGREGAT Vol 6, No 1 (2021): Vol.6, No.1 (2021)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v6i1.8323

Abstract

AbstractIndonesia is recorded to have experienced several large earthquakes and caused many casualties. One of the efforts that can be made to reduce the risk of earthquake disasters is to design buildings with an earthquake-resistant concept. In building planning with the concept of earthquake resistance, especially high buildings, time history data is needed in planning earthquake loads. The availability of time history data in Indonesia is still a big problem. To overcome this data limitation, an alternative can be provided by creating a synthetic ground motion. The purpose of this research is to provide time history data in Riau Province which can be used as a reference in designing earthquake loads for building planning. Determination of Uniform Hazard Spectrum (UHS) was carried out using a probabilistic method, followed by spectral matching to obtain synthetic ground motion. The results of this study indicate that the risk of earthquakes is represented in the form of acceleration values in Riau province at UHS which have an acceleration value of 0.27 g at T = 0 seconds, 0.63 g at T = 0.2 seconds, and 0.41 g at T = 1 second. The source of the earthquake that is predicted to have the largest contribution to earthquake risk is the shallow crustal earthquake source, namely the Barumun Fault with a dominance of 63.68%. The results of synthetic ground motion for Riau Province have a maximum acceleration value of 0.26 g. Keywords: Earthquake, probability method (PSHA), synthetic ground motion              AbstrakIndonesia tercatat telah mengalami beberapa kali gempa dengan kekuatan yang cukup besar dan menyebabkan banyak korban jiwa. Salah satu upaya yang dapat dilakukan untuk mengurangi risko bencana yang diakibatkan oleh gempa adalah mendesain bangunan dengan konsep tahan gempa. Dalam perencanaan bangunan dengan konsep tahan gempa teurtama gedung tinggi dibutuhkan data time history dalam merencanakan beban gempa. ketersediaan data tim history di Indonesia saat ini masih menjadi kendala. Untuk mengatasi keterbatasan data tersebut, maka diberikan alternatif dengan membuat ground motion sentetik. Tujuan dilakukannya penelitian ini adalah untuk menyediakan data time history rekaman gempa di Provinsi Riau yang dapat jadikan referensi dalam mendesain beban gempa untuk perencanaan gedung. Penentuan Uniform Hazard Spectrum (UHS) dilakukan dengan metode probabilistik, kemudian dilanjutkan dengan melakukan spectral matching untuk mendapatkan ground motion sintetik. Hasil dari penelitian ini diperoleh risiko gempa yang direpresentasikan dalam bentuk nilai percepatan di provinsi Riau pada UHS memiliki nilai percepatan 0.27 g pada T = 0 detik, 0.63 g pada T = 0.2 detik, dan 0.41 g pada T = 1 detik. Sumber gempa yang diprediksi memiliki kontribusi terbesar terhadap risiko gempa adalah sumber gempa shallow crustall yaitu Sesar Barumun dengan dominasi sebesar 63,68%. Hasil Ground motion sintetik untuk Provinsi Riau memiliki nilai percepatan maksimum sebesar 0.26 g.
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.
Perbandingan Peta Percepatan Tanah di Permukaan sebagai Dasar Perencanaan Tata Ruang Berbasis Mitigasi Bencana di Provinsi Riau Elvis Saputra; Fitri Nugraheni; Widodo Pawirodikromo; Lalu Makrup
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2, DESEMBER 2021
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1277.257 KB) | DOI: 10.14710/mkts.v27i2.36902

Abstract

Spatial planning has an important role in disaster mitigation efforts. The availability of earthquake maps is very useful in spatial planning. The need for spatial planning today is micro spatial planning. Therefore, the 2017 national earthquake map needs to be detailed into a micro zonation map at the district or city scale. The ground acceleration presented in the national earthquake map was the acceleration at bedrock, while in spatial planning it is the necessary acceleration at the surface. Therefore, the purpose of this research was to obtain a map of the earthquake at the surface with a micro-scale. Determination of the acceleration value at the surface was carried out by two models. Model-1, the surface acceleration was obtained by multiplying the results of the PSHA analysis at bedrock by the amplification factor based on SNI-1726. While Model-2, the acceleration value at the surface was directly obtained from the results of PSHA analysis using the average surface shear wave velocity (Vs30) based on data from the USGS. The result of this study showed that from the 2 analytical models used, Model-2 has a higher surface acceleration value than Model-1. Riau Province has 12 districts. in general, the 12 districts were included in the low to moderate risk index class, but there was one district that was close to the high index class, namely Rokan Hulu district.
Co-Authors Fitri Nugraheni Malik Musthofa Saputra, Elvis Suharyatmo Widodo . Widodo Pawirodikromo Wisnu Erlangga Yunalia Muntafi