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Journal : Serambi Engineering

Kajian Potensi Genangan dan Waktu Tiba Tsunami Di Kota Lhokseumawe Ibrahim; Tursina; Syarifah Keumala Intan; Mirza Fahmi; Zairipan Jaya; Abdullah Irwansyah
Jurnal Serambi Engineering Vol. 9 No. 2 (2024): April 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Lhokseumawe was one of the towns affected by the 2004 tsunami. During the last tsunami, tsunami waves arrived last on the coast of Lhokseumawe compared to the western and northern coastal areas of Aceh. Therefore, this tsunami modelling study was conducted to determine the arrival time of tsunami waves onthe coast of Lhokseumawe city and to determine the affected areas from the tsunami inundation map information. The method used is tsunami numerical modelling using the COMCOT (Cornell Multi Grid Coupled Tsunami Model) model. The earthquake source used to generate the tsunami is a 9.15 Mw earthquake of the magnitude of the 2004 earthquake, 8.0 Mw and 8.5 Mw earthquake scenarios. Bathymetric data were used to provide information on sea depth and topographic data to provide information on land elevation in the study area. Observation points were placed on the coast to record when the waves reached the coast. The maximum tsunami height occurred in Blang Mangat subdistrict with a tsunami height of 5 m and inundation distance of 1 km. The arrival time of the tsunami in Lhokseumawe town was 75-80 min after the earthquake. This information on tsunami height and arrival time can be used as preliminary information for tsunami mitigation planning and rapid response in the event of an earthquakewith tsunami potential.
Analisis Risiko Konstruksi Bangunan Gedung Bertingkat Sedang Dengan Metode HIRARC Reisya Nabila Hasibuan; Syarifah Keumala Intan; Herri Mahyar
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Construction projects are inherently dynamic and entail a certain degree of risk, particularly in the context of the construction of an eight-story building. The occurrence of risks within a project can result in financial losses, necessitating the identification and evaluation of potential risks. In this study, a construction risk analysis was conducted on a medium-rise building comprising eight floors, employing the Hazard Identification, Risk Assessment and Risk Control (Hirarc) method. A quantitative descriptive research study was conducted using a purposive sampling method, with a total of 36 respondents. The primary data were collected in the form of questionnaires, while the secondary data were sourced from Job Safety Analysis (JSA), K3 audit reports, and plan drawings. The quantitative descriptive questionnaire instrument was found to be valid and reliable. The results of the hazard identification process, based on data obtained from secondary sources, identified 45 potential risks. These were then subjected to a risk assessment based on probability and severity. The risk assessment results indicate that there is one high-risk activity, namely the modification of the structural design of the columns, beams, and floor plates. Additionally, there are 44 risks classified as moderate-risk. The most effective risk control strategy from an engineering perspective is to implement a flexible material procurement schedule, which facilitates improved communication and coordination. From an administrative standpoint, monitoring and evaluation represent key risk control measures.