ORCID Profile
0000-0001-7367-6181
Current Organisation
Universitas Syiah Kuala
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Publisher: Indonesian Journal on Geoscience
Date: 31-08-2017
Publisher: Elsevier BV
Date: 07-2018
Publisher: IOP Publishing
Date: 06-2019
Publisher: IOP Publishing
Date: 03-01-2020
Publisher: Thomas Telford Ltd.
Date: 02-2009
DOI: 10.1680/GENG.2009.162.1.41
Abstract: The tsunami that struck and devastated large sections of the coastline of Aceh in northern Sumatra, on 26 December 2004 was generated by a massive offshore earthquake of magnitude 9·3. As part of the reconstruction programme, UNICEF is engaged in the replacement of old schools and health clinics at over 580 locations throughout the province of Aceh and the island of Nias. The programme is urgent and tight, compounded frequently by difficult access. An approach to the examination of the ground conditions at the sites had to be established that would allow the use of light equipment and tools and a relatively unskilled workforce. In situ tests were conducted using a locally manufactured equivalent light Dutch cone apparatus, a dynamic cone penetrometer (DCP) and field vane equipment. Laboratory testing, apart from normal identification and classification tests, included undrained shear strength determinations. This paper sets out the modus operandi developed to suit the site conditions, and describes the types of soil and conditions encountered. The paper also presents a tentative correlation between the results of the in situ (DCP) testing and the undrained shear strength of the s les recovered for laboratory testing. The approach should have merit when responding to future disasters.
Publisher: IOP Publishing
Date: 2020
DOI: 10.1088/1757-899X/712/1/012013
Abstract: Analytical models have demonstrated that they are able to simulate reasonably well the seismic motions at the ground level. The most widely used model is the equivalent linear approach. This equivalent linear model was used to compute the free-field response of Meureudu-Pidie Jaya, Aceh Indonesia’s soft soils during the 2016 Pidie Jaya earthquake. The model computes the ground response of horizontally layered soil deposits subjected to transient and vertically propagating shear waves through the one-dimensional soil column. Each soil layer is assumed to be homogeneous, visco-elastic and infinite in the horizontal extent. The equivalent linear estimation of soil properties is taken to express the nonlinearity of the soil’s shear modulus and d ing values. These values are assumed to be a function of shear strain litude and determined by an iterative process that must be consistent with the level of the effective strain induced in each sub-layer. Starting with the highest shear modulus and a low d ing value, the shear modulus and the d ing ratio of each sub-layer are modified. The modification is based on the applicable relationship between both properties and the shear strain. The calculation is repeated until strain-compatible modulus and d ing values converge within a tolerance of 1%. This research reveals the ground motions of Pidie Jaya’s soils. The results of the analysis are presented.
Publisher: Elsevier BV
Date: 06-2020
Publisher: IOP Publishing
Date: 05-2019
DOI: 10.1088/1757-899X/523/1/012082
Abstract: This study investigates the grain size characteristics and sediment types of the Aceh’s coastal deposits that are primarily based on the sieve analysis. This study is mainly driven by two reasons. Firstly, this study is a preliminary effort to identify coastal sediment in the Aceh coastal areas. Secondly, this information is important to interpret the support mechanism of sediment during transportation and depositional processes. In this study, many sediment deposits from both the east and west coasts of Aceh were collected. Laboratory sieve analysis was carried out to these s les. Then, further analysis of this sieve analysis results is carried out. The analysis reveals the past transport mechanism of this study sand deposits which is river’s channel. However, such finding should be investigated further as all the tested sand were taken at the top surface and big main rivers are not indicated at both sand locations.
Publisher: International Journal of Geomate
Date: 06-2020
Publisher: Indonesian Journal on Geoscience
Date: 24-05-2017
Publisher: Elsevier BV
Date: 04-2020
Publisher: IOP Publishing
Date: 05-2019
DOI: 10.1088/1757-899X/523/1/012043
Abstract: A single ambient noise measurement has been found to be useful in investigating the near-surface geology in particularly for estimating site fundamental frequency. This single microtremor method is very attractive and has been successfully applied in many projects as the method is non-destructive, low cost, feasible for urban environments, fast, and deep penetration. Furthermore, this single microtremor method has been successfully applied in many projects. This paper presents the application of the single microtremor method to estimate the site fundamental frequency at a site in the historical city of Byblos, Lebanon. Pre-processing of industrial origin detection was carried out. Several durations of the measurements were investigated to obtain the most stable results. The site fundamental frequency was validated using one-dimensional site response analysis. The results are presented in this paper.
Publisher: Institute of Postgraduate Studies, Syiah Kuala University
Date: 25-01-2023
DOI: 10.13170/AIJST.11.3.28360
Abstract: Aceh is justified as one of the Indonesian provinces with a high level of seismicity. This high seismicity certainly has a severe negative impact on various aspects of human life in Aceh and the surrounding areas. Various types of efforts must be carried out to solve and mitigate the problem caused by each earthquake in Aceh and the surrounding areas. One aspect that can be carried out to minimize the hazards of seismic activity is the characterization of the source of the earthquake. This characterization can be used for various purposes for further seismic-related studies, including for studying seismic hazard analysis using the probabilistic seismic hazard analysis (PSHA) method. This research aims to determine the characteristics of the seismic source zones for Aceh and the surrounding areas. Based on the geological setting and seismicity catalog data of Aceh and the surrounding areas, a new model of seismic source zones was developed. This new model proposed for Aceh and the surrounding areas is ided into four zones: shallow background seismic source zones ( ided into two source zones), two deep background seismic source zones, two megathrust source zones, and one fault zone, namely the Sumatra fault zone. The results of this study suggest that Zone I and Zone II of shallow background seismic source zones have a-values of 2.36 and 4.7, b-values of 0.545, and Mmax of 7.7 and 6.8. Deep background seismic source zone I has an a-value of 4.43 and a b-value of 0.9 with a maximum magnitude of 7 Mw. Meanwhile, deep background seismic source zone II has an a-value of 3.28 and a b-value of 0.755 with a maximum magnitude of 6.1 Mw. Megathrust seismic source zone I has an a-value of 3.53 and a b-value of 0.691 with a Mmax of 7.7 Mw. Meanwhile, the megathrust seismic source zone II has an a-value of 3.81 and a b-value of 0.702 with a Mmax of 7.1 Mw. Sumatra fault seismic source zone has an a-value of 2.88 and a b-value of 0.615 with a Mmax of 6.7 Mw.
Publisher: Author(s)
Date: 2017
DOI: 10.1063/1.4987079
Publisher: LPPM Unsyiah
Date: 30-12-2022
Publisher: Elsevier BV
Date: 10-2018
Publisher: Elsevier BV
Date: 09-2018
Publisher: Institute of Postgraduate Studies, Syiah Kuala University
Date: 31-12-2018
Abstract: Due to its continuous data recording capability, excellent repeatability and accuracy, relatively low cost and simplicity of operation, the cone penetration test (CPT) offers enhanced liquefaction assessment over its predecessor the standard penetration test (SPT). However, soil ageing, which influences the cyclic resistance ratio (CRR), is difficult, if not impossible, to be detected by the CPT due to disturbance during the test. This situation may lead to excessively conservative estimation of CRR values which result in conservative assessment of liquefaction potential. This paper presents and discusses liquefaction assessment using the CPT and methods for accounting for soil ageing. A field study, conducted at Gillman, South Australia, is presented and the study site is assessed for liquefaction potential. This paper also explores the influence of soil ageing on the subsequent liquefaction assessment.
Publisher: Author(s)
Date: 2018
DOI: 10.1063/1.5047286
Publisher: EDP Sciences
Date: 2018
DOI: 10.1051/MATECCONF/201819710002
Abstract: The city of Banda Aceh is potentially exposed to a significant seismic hazard of seismic site lification. Estimation of seismic site lification of the city is urgently required for any mitigation efforts as the city is founded on a thick, soft layer. This study aims to estimate seismic site lification of Banda Aceh's soil. Analytical models have demonstrated that they can simulate reasonably well the seismic ground motions lification. The most widely used model is the equivalent linear approach. The approach computes the ground response of horizontally layered soil deposits subjected to transient and vertically propagating shear waves through a one-dimensional soil column. As aforementioned, this study focuses on Banda Aceh-Indonesia which is founded on thick alluvium. Three actual historical time histories and three developed sub-surface models were used to estimate the seismic site lification of Banda Aceh's soft soil. The used time histories are of 2012 M8.1 Simeulue earthquake, 2013 M6.0 Mane-Geumpang earthquake and 2013 M6.2 Bener Meriah earthquake. Three sub-surface models of three separate sites across the city of Banda Aceh were developed. The site response analysis results reveal the ground motions lification of Banda Aceh's soils of up to 4.3. Thus, applying the seismic site lification for structural design at Banda Aceh can be further works.
Publisher: EDP Sciences
Date: 2018
DOI: 10.1051/MATECCONF/201819710001
Abstract: Reliable spectral displacement (SD) in a wide range of response periods is crucial in seismic vulnerability assessment for Banda Aceh-Indonesia as the city is founded on a thick-soft soil. This SD is excellent for estimating building drift ratio from which the vulnerability of building is assessed. SD can be obtained from conversion of the acceleration spectra (converted SD) and site response analysis (analyzed SD). In this paper, both converted- and analysed-SDs are developed for Banda Aceh’s soft soil case using three historical seismic events of the 2012 Simeulue II, the 2013 Mane-Geumpang, and the 2013 Bener Meriah earthquakes and three soil models from which acceleration-displacement response spectrum (ADRS) of Banda Aceh’s soft soil is proposed. This proposed ADRS is compared to the generic response spectra of Centre of Research and Development of Housing and Settlement (PUSKIM) Indonesia. It can be concluded that the Proposed ADRSs can be used as another source in determining the performance of a building beside the PUSKIM ADRSs. Furthermore, the developed SDs were used to calculate the drift of 2-, 3-, and 4-storey typical shop-house buildings at Banda Aceh-Indonesia.
Publisher: EDP Sciences
Date: 2022
DOI: 10.1051/E3SCONF/202234002009
Abstract: Ambient vibration measurement using a seismometer represent a non-invasive and non-destructive method for seismic-related studies. This method inhibits widespread applications, i.e., assessing site fundamental frequency, estimating bedrock level, calculating building natural frequency, deducing shear wave velocity profile. However, the instrument required to carry out such ambient vibration measurement is generally expensive. Recently, there is a low-cost Raspberry Shake 3D seismometer (RS-3D) available on the market. This seismometer is based on Raspberry Pi hardware. It contains three 4.5 Hz orthogonally oriented geophones, which can be set at a s ling rate of 100 Hz and a bandwidth of -3dB points at 0.6 to 34 Hz. Thus, laboratory testing was carried out to assess this device’s performance in this demanding application. Generally, RS-3D demonstrates a great performance. Further detailed results are presented in this paper.
Publisher: Elsevier BV
Date: 07-2019
No related grants have been discovered for Bambang Setiawan.