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All Journal Lowland Technology International Journal of the Civil Engineering Forum
Lindung Zalbuin Mase
University of Bengkulu
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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A comparative study of geophysical measurements to characterise the local site condition of Bengkulu City, Indonesia Lindung Zalbuin Mase; Samsul Bahri; Aliawan Saputra
Lowland Technology International Vol 22 No 3 (2020): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v22i2, Septemb.630

Abstract

Bengkulu City is one of the vulnerable areas to undergo earthquakes in Indonesia. Two major earthquakes happened in 2000 and 2007 had appeared the issue that the site condition played the important role in determining the seismic effect in Bengkulu City. However, the detail understanding of local site condition including the parameter to measure it, is still not fully achieved. This paper presents a comparative study of geophysical measurement to characterise local site condition in Bengkulu City. The geophysical surveys using Multichannel Analysis of Surface Wave (MASW) and Ambient Noise of Microtremor methods are performed to several sites in Bengkulu City. Furthermore, the inversion analysis to generate shear wave velocity (Vs) is performed. The comparisons to site class and time-averaged shear wave velocity for first 30 m depth (Vs30) are also compared. The results show that MASW results tend to be more conservative than Microtremor results. However, both measurements show the similar tendency for site class condition. This study also proposed the empirical models in estimating Vs30 and seismic vulnerability (Kg) indices for Bengkulu City. Those models are reliable in engineering practice application in Bengkulu City.
Implementation of Agent Based Modelling to Observe the Evacuating Behavior at Faculty of Engineering Building, University of Bengkulu, Indonesia Hardiansyah; Wida Fitrianip; Annisa Fitria Edriani; Robi Hardiansyah; Rizka Lestyanti; Lindung Zalbuin Mase
Journal of the Civil Engineering Forum Vol. 8 No. 2 (May 2022)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6134.376 KB) | DOI: 10.22146/jcef.3589

Abstract

Evacuation is an important issue during the occurrence of an earthquake, due to the influence of people’s responsive behaviours to the disaster. This indicates the occurrence of overcrowded conditions, which causes the conflict of people’s movement. It is also one of the main reasons the process of evacuation is difficult, leading to the necessity to specifically model the movement within each building. Therefore, this study aims to analyze the earthquake evacuation modelling in Faculty of Engineering building, University of Bengkulu, Indonesia. This used a multi-agent programmable modelling environment known as NetLogo, which adopted an ABM model that is often utilized to observe elemental movement response. The agents occupying the building also moved to the stairs and evacuation doors, for exit towards the assembly point, which was located in front and behind Faculty of Engineering. The agent-based modelling is then conducted by inputting the layout of the building and the number of occupants in each room. Furthermore, the simulations were performed by considering various agents’ capacity in the building, during the evacuation. The results showed the time taken for the agents to exit the building during the disaster. This confirmed that the required exit time generally decreased with the increasing population percentage in the building. During this process, the conflict point also occurred around the corridor of Floors 1 and 2 (T1, T2 and T3), as well as the exits of the building (P1, P2, P3, and P4). This was due to the occurrence of a high density when agents carry out evacuation movements. Based on these results, the placement of signs was recommended, as guidelines during the evacuation process.
Co-Authors Aliawan Saputra Annisa Fitria Edriani Hardiansyah Rizka Lestyanti Robi Hardiansyah Samsul Bahri Wida Fitrianip