Aceh located in earthquake disaster-prone area because it is located between two tectonic plates and also surrounded by several active volcanos. When earthquakes shake, the building frequency (f) should not be equal to the natural soil frequency (fn) as it may cause the collapse of buildings. The purpose of this study is to determine dynamic seismic parameters value on the surface layers for forthcoming disaster mitigation. The object study for this research were Rahmatullah Lampuuk Mosque, Sultan Iskandar Muda Airport, Lambaro Bridge in Aceh Besar, TDMRC building, and Taman Sari. Soil samplings from the locations and data obtained from the BMKG such as earthquake center map, coordinates, magnitude, and earthquake depths were used in the study. The result of this research was Gmax value based on Richart method. Kramer method was also used for computing the fn parameters. Some static and dynamic calculation of design parameter result from Rahmatullah Lampuuk Mosque shows that with void ratio (e) = 0.92, the Gmax = 266 × 103 kg/ms2, Vs = 10.096 m/s and fn = 2.524 Hz. The comparison of fn and fstructure = 2.50 Hz which not equal to zero make the building were safe from collapse during previous earthquakes in Aceh.
This paper examines urban safety of coastal zone in Banda Aceh city, based on multidisciplinary aspect. Firstly, from the perspective of geophysics aspect, the disasters are affected by the imbalance of the law of action-reaction, that material experiences repeated recurring collapse in return-period. Secondly, geotechnical considerations are a required to ensure the safety aspect in term of construction of escape hill. Lastly, from regional planning aspect, this research finds that the increasing of immigrating population to the high-risk coastal zone has not been followed by the development of evacuation facilities, amongst are escape hills. One consideration in escape hill development is the influence of freeboard and run up level, to obtain a safe embankment height and soil bearing capacity. Based on the soil properties c=0.03 kN/m2 and φ=32.5º was able to build escape hill up to a height of 8.00 m in stable with safety factor SF=2.6. Material sets with these variations can be proposed to establish the term of reference and detail engineering design in carrying out the escape hill construction at this location. This research finds that it is needed to build 12 more evacuation sites to improve urban safety in Banda Aceh City.
Earthquake threats that had caused tsunami hazards with a lack of optimal efforts in the construction of evacuation sites, it is necessary to conduct studies on evacuation sites as escape hill. One method of overcoming building construction on the effect of freeboard and run-up level of vertical walls in one of tsunami evacuation models that need to be analyzed for the maximum height that is suitable against the lateral force of tsunami wave. This study’s purpose is to calculate the stability of slope and embankment high on escape hill and calculate the safety factor of soil bearing capacity. The data obtained from the undisturbed sample are then taken to the laboratory for physical and mechanical properties analysis and slope failure of escape hill calculated using the finite element method. This study of maximum embankment height the escape hill for evacuation site, stability obtained at an altitude of 10.0 m and safety factors are 2.14 to 2.84 which is very safe. From the material set design that has been done, it is shown that the modeling of materials set with variations of soil cohesion value (c) and the value of the shear angle in the soil (φ) the safety factor of 2.412.
This time, many people in Indonesia, especially in Bandar Lampung, use coastal areas as a place to live and depend on their lives there. However, there are still many people who live in poverty and housing conditions that tend to be inadequate and have a bad enough environmental quality, making the settlement areas look so slum. If the coastal area is compared to other areas, it tends to be more prone to disasters due to the factor of low income communities being unable to carry out the recovery process independently. The purpose of this research is to formulate general zoning regulations in coastal areas of Bandar Lampung to reduce flood risk. The method of this research is map overlapping, quantitative descriptive analysis and formulating general zoning regulations. This research argues that general zoning regulation could be adopted to mitigate flood risk.
Green space is an important component of city life that functions to maintain urban ecosystem. The presence of green space is increasingly pressed dueto the rapid rate of urbanization in Indonesia which has an impact on the increasing challenge of green space provisioning in urban area. One of the land that can be optimized as green space is degraded or abandoned landthat can be caused by various factors, one of which is natural disasters. BNI Tibang City Forest and BNI Trembesi City Park are green open space developed on abandoned land affected by the Tsunami disaster that struck Aceh in 2004. This study aims to examine the collaboration between government and non-government stakeholders in regenerating Tsunami affected land into green space area, consisting of BNI Tibang City Forest and BNI City Park. The result of the study showed that the regeneration of abandoned land into green space area in two study cases area has contributed respectively 6.75 hectares and 2.59 hectares. Besides, the study showed that a number of non-governmental stakeholders consisting of non-governmental organizations (NGOs), the private sector, and the community were involved in the initiation, implementation and maintenance stages of the BNI Tibang City Forest and the BNI Trembesi City Park with the collaboration degree reaching the partnership between government and non-government stakeholders.
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