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Probabilistic seismic hazard map analysis for Aceh Tenggara district and microzonation for Kutacane city
IOP Conference Series: Earth and Environmental Science Pub Date : 2021-01-13 , DOI: 10.1088/1755-1315/630/1/012001
I. Irwandi 1, 2, 3 , Umar Muksin 1, 2, 3 , Asrillah 3 , Andrean V H Simanjuntak 4 , Asrurifak 5
Affiliation  

The Aceh Tenggara (Southeast Aceh) District, especially Kutacane, is located along with the main GSF (Great Sumatra Fault) system and the Tripa segment in particular based on seismic hazard map of Indonesia 2017. Therefore, the seismic hazard map needs to be updated based on the recent seismotectonic information and the latest active fault investigations. This paper discusses the updated seismic hazard map for the Aceh Tenggara district. In seismic hazard calculation, input source definition including fault characteristics, subduction zone, and seismicity background. Ground Motion Prediction Equation (GMPE) is used by the Indonesian official seismic hazard map 2017 to compute the hazard curve of strong ground shaking. Probability exceeding 2% and 10% for 50 years is chosen to calculate PGA (Peak Ground Acceleration) map on bedrock. On the other hand, Kutacane is located on a younger alluvium basin in the Holocene epoch thus site sediment amplification effect is taken into account in the microzonation calculations (local scale). The geomorphological slope is used to estimate the Vs30 distribution map. The site amplification is calculated based on PGA value on bedrock and Vs30 value on each site location. The Probabilistic Seismic Hazard Analysis (PSHA) is applied to produce seismic hazard maps as also used since many scientists and engineers in Indonesia although for critical infrastructure Neo-Deterministic Seismic Hazard Analysis (NDSHA) is suggested to be applied. The newly updated seismic hazard map can be used for the reference of infrastructure development in order to reduce the risk of disaster.



中文翻译:

亚齐登加拉地区的概率地震灾害图分析和库塔卡尼市的微区划

亚齐登加拉(亚齐东南部)地区,特别是库塔卡内,与主要的GSF(大苏门答腊断层)系统以及Tripa段一起定位,尤其是基于印度尼西亚2017年地震灾害图。因此,地震灾害图需要更新基于最新的地震构造信息和最新的活动断层调查。本文讨论了亚齐登加拉地区的最新地震灾害图。在地震危险计算中,输入源定义包括断层特征,俯冲带和地震活动背景。印度尼西亚官方地震灾害地图2017使用了地面运动预测方程(GMPE)来计算强烈地面震动的危害曲线。选择50年内超过2%和10%的概率来计算基岩上的PGA(峰值地面加速度)图。另一方面,Kutacane位于全新世时期的一个较年轻的冲积盆地上,因此在微区划计算(局部规模)中考虑了站点沉积物的放大作用。地貌坡度用于估算Vs30分布图。根据基岩上的PGA值和每个站点位置上的Vs30值来计算站点放大率。自印度尼西亚的许多科学家和工程师以来,概率地震危险性分析(PSHA)被用于制作地震危险性图,尽管建议在关键基础设施中应用新确定性地震危险性分析(NDSHA)。新近更新的地震灾害图可用于基础设施建设,以减少灾害风险。库塔卡因位于全新世时期的一个较年轻的冲积盆地上,因此在微区划计算(局部尺度)中考虑了站点沉积物的放大作用。地貌坡度用于估算Vs30分布图。根据基岩上的PGA值和每个站点位置上的Vs30值来计算站点放大率。自印度尼西亚的许多科学家和工程师以来,概率地震危险性分析(PSHA)被用于制作地震危险性图,尽管建议在关键基础设施中应用新确定性地震危险性分析(NDSHA)。新近更新的地震灾害图可用于基础设施建设,以减少灾害风险。库塔卡因位于全新世时期的一个较年轻的冲积盆地上,因此在微区划计算(局部尺度)中考虑了站点沉积物的放大作用。地貌坡度用于估算Vs30分布图。根据基岩上的PGA值和每个站点位置上的Vs30值来计算站点放大率。自印度尼西亚的许多科学家和工程师以来,概率地震危险性分析(PSHA)被用于生成地震危险性图,尽管建议在关键基础设施中应用新确定性地震危险性分析(NDSHA)。新近更新的地震灾害图可用于基础设施建设,以减少灾害风险。

更新日期:2021-01-13
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