ORCID Profile
0000-0002-7635-7626
Current Organisations
University of Adelaide
,
Universitas Syiah Kuala
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Publisher: Elsevier BV
Date: 07-2014
Publisher: Elsevier BV
Date: 05-2023
Publisher: IOP Publishing
Date: 06-2019
DOI: 10.1088/1755-1315/273/1/011001
Abstract: Preface The 11th Aceh International Workshop and Expo on Sustainable Tsunami Disaster Recovery, AIWEST-DR 2018, was organised from 10 to 12 October 2018. The bi-annual AIWEST-DR was conducted this time with the theme “ Advancing Science and Technology Innovation for Sustainable Disaster Resilience and Risk Reduction ”. Tsunami and Disaster Mitigation Research Center (TDMRC) of Syiah Kuala University was profoundly enjoying the collaboration with the International Research Institute of Disaster Science (IRIDeS) of Tohoku University in Japan in a joint-organizing committee. AIWEST-DR conference ensures opportunities for academics, professionals, researchers and students who are working on disaster-related research to communicate the science they produce not only among themselves, but also for the practitioners, governmental officers, and communities in disaster-prone areas. We also want to ensure the Sendai Framework for Disaster Risk Reduction (SFDRR) be resonant in the mind of all stakeholders. AIWEST-DR 2018 proceeding contains papers written by academics, professionals, researchers and students from at least six countries including Indonesia, Japan, Germany, Thailand, Malaysia and Saudi Arabia. Various research works related to the conference theme were presented during the conference. From a total of 62 full papers accepted upon review, they are categorized into the following specific topics: A. Tsunami, climate change and others coastal hazard B. Geohazard and hazard characteristics and modelling C. Community preparedness, disaster education, local and indigenous knowledge D. GIS and applied technology for disaster E. Recovery and human security
Publisher: Trans Tech Publications, Ltd.
Date: 11-2014
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.838-841.525
Abstract: This paper reports on part of an ongoing experimental program at The University of Adelaide on the flexural behavior of FRP-high-strength concrete (HSC)-steel double-skin tubular beams (DSTBs). The results from three circular DSTBs that were tested as simply supported beams in a four-point bending setup under monotonic loading are presented. The experimental study investigated the influences of the inner steel tube diameter and the use of mechanical connectors on the steel tube on the flexural behavior of DSTBs. The results indicate that DSTBs are capable of developing very high inelastic flexural deformations. However, the results also indicate that slip between the concrete and the steel tube of the DSTB can be relatively large, unless the bond between concrete and steel tube is enhanced through the use of mechanical connectors. It was also observed that the flexural behavior of DSTBs is influenced significantly by the diameter and thickness of the inner steel tube.
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2014
Publisher: Copernicus GmbH
Date: 11-07-2019
DOI: 10.5194/NHESS-19-1365-2019
Abstract: Abstract. Regional seismic risk assessment is paramount in earthquake-prone areas, for instance, to define and implement prioritisation schemes for earthquake risk reduction. As part of the Indonesia School Programme to Increase Resilience (INSPIRE), this paper proposes an ad hoc rapid-visual-survey form, allowing one to (1) calculate the newly proposed INSPIRE seismic risk prioritisation index, which is an empirical proxy for the relative seismic risk of reinforced concrete (RC) buildings within a given building portfolio (2) calculate the Papathoma Tsunami Vulnerability Assessment (PTVA) index, in any of its variations (3) define one or more archetype buildings representative of the analysed portfolio (4) derive detailed numerical models of the archetype buildings, provided that the simulated design is used to cross-check the model assumptions. The proposed INSPIRE index combines a baseline score, calibrated based on fragility curves, and a performance modifier, calibrated through the analytic hierarchy process (AHP) to minimise subjectivity. An attempt to define a multi-hazard prioritisation scheme is proposed, combining the INSPIRE and PTVA indices. Such a multi-level framework is implemented for 85 RC school buildings in Banda Aceh, Indonesia, the most affected city by the 2004 Indian Ocean earthquake–tsunami sequence. As part of the proposed framework, two archetype buildings representative of the entire portfolio are defined based on the collected data. Their seismic performance is analysed by means of non-linear static analyses, using both the analytical simple lateral mechanism analysis (SLaMA) method and numerical finite-element pushover analyses to investigate the expected plastic mechanisms and derive displacement/drift thresholds to define appropriate damage states. Finally, non-linear dynamic analyses are performed to derive fragility curves for the archetype buildings. This paper demonstrates the effectiveness of the INSPIRE data collection form and proposed index in providing a rational method to derive seismic risk prioritisation schemes and in allowing the definition of archetype buildings for more detailed evaluations/analyses.
Publisher: Informa UK Limited
Date: 29-11-2019
Publisher: Elsevier BV
Date: 04-2023
Publisher: IWA Publishing
Date: 18-05-2023
Abstract: Adequate water, sanitation, and hygiene (WASH) facilities in schools are vital, especially for girls. This study addresses a gap in assessing the adequacy of WASH facilities' repair at schools affected by natural hazards. Central Sulawesi was used as a case study where principal interviews were conducted at 26 schools, and structured observations were made at 18 schools, 3 years after the earthquake in September 2018. Ten of 26 principals reported no damage to the toilets from the events of September 2018. Among those who did, a third felt that the fixes insufficiently met basic needs and that they did not deliver WASH services as well as they used to. Not all WASH inadequacy stemmed from the earthquake. Structured observations revealed that most toilets lacked soap, open water reserves were placed next to non-flush latrines, posing a high potential for vector-breeding, and there were inadequate facilities for menstrual hygiene management, including no bins. Recommendations include ensuring a supply of soap, adding lids to water storage containers, and providing sanitary napkins and lidded bins. Observations suggested that private schools provided a better level of WASH service than state schools, and schools in more hazardous zones did not take longer to recover.
Publisher: Trans Tech Publications, Ltd.
Date: 08-2013
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.743.39
Abstract: This paper reports on part of an ongoing experimental program at The University of Adelaide on the seismic behavior of high-strength concrete (HSC)-filled fiber reinforced polymer (FRP) tubes (HSCFFTs). The results from three square concrete-filled FRP tube (CFFT) columns that were tested under combined constant axial compression and reversed-cyclic lateral loading are presented. The main parameters of the experimental study included the axial load level, concrete strength, and FRP tube corner radius. The results indicate that square HSCFFT columns are capable of developing very high inelastic deformation capacities under simulated seismic loading. The results also indicate that increasing the corner radius beyond a certain threshold value provides no increase in column lateral drift capacities. It was observed that column deformability decreased with an increase in axial load level ( P/P o ) and concrete compressive strength ( f c ). The results of the experimental program are presented together with a discussion on the influence of the main parameters on the seismic behavior of CFFT columns.
Publisher: Elsevier BV
Date: 10-2023
Publisher: Elsevier BV
Date: 02-2015
Publisher: Elsevier BV
Date: 07-2016
Publisher: Author(s)
Date: 2018
DOI: 10.1063/1.5047297
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2013
Publisher: Institute of Research and Community Services Diponegoro University (LPPM UNDIP)
Date: 29-07-2022
DOI: 10.14710/MKTS.V28I1.40075
Abstract: The use of recycled coarse aggregate (RCA) could be an alternative solution to the scarcity of natural aggregates as a concrete material and also the problem of construction waste. This paper aim is to analyze the model of compressive stress-strain curve of recycled aggregate concretes based on the literature review using the statistical approach. Database of existing experimental tests from different researchers consists 124 test specimens that come from 25 previous published journal articles. The specimens was selected based on the proportion of RCA mixtures that been used which are 50% and 100% of the concrete aggregates. This research was using simple linear regression analysis method with Statistical Package for The Social Sciences (SPSS) software. The data of the specimen analysis was differentiated into three stages of analysis, namely the analysis for the whole group data specimens, the group of concrete specimens without any additives, and specimens that use additives. The results show that the significant value from the data analysis was lower than 0.05, which are the limit values for significant value of the data analysis. This means that the water-cement ratio has the influence to the compressive strength of RCA concrete mix.
Publisher: IOP Publishing
Date: 06-2019
DOI: 10.1088/1755-1315/273/1/012050
Abstract: The current rapid assessment of post-earthquake damaged houses has been done manually. The determination of the damage level is also very subjective. Moreover, the available time during a rapid assessment and limited number of enumerators lead to ineffective decisions for responses and assistances. There are several application had appeared trying to answer the problems, but still they have many types of data that need to be input and even need a lot of time to process. The system design to be simple, more user-friendly and time efficient to be operated during the assessment. This study is aimed to develop a conceptual design of a system to collect data of houses damaged by earthquake using mobile application which propose to work both online and offline. The system will consists of five components: mobile device, user, data center (web server and database), internet, and data processing center (administrator and manager to verify and analyze the data). The application design to be integrated with Google Maps containing concise data entry to facilitate users (trained users and common users) and to shorten the time of data collection. Final collected data will be presented through the website and perform descriptive and spatial analysis.
No related grants have been discovered for Yunita Idris.