Deterministic Seismic Hazard Analysis in Thailand using Active Fault Data
To develop seismic design criteria for buildings, seismic hazard analysis is required to estimate the ground motion intensity with criteria such as peak ground acceleration (PGA). The seismic hazard can be analyzed by using two approaches: deterministic seismic hazard analysis (DSHA) and probabil...
Main Authors: | , , , |
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Format: | Article |
Language: | English |
Published: |
Universitas Indonesia
2016-12-01
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Series: | International Journal of Technology |
Subjects: | |
Online Access: | http://ijtech.eng.ui.ac.id/article/view/306 |
Summary: | To develop seismic design criteria for buildings, seismic hazard analysis is
required to estimate the ground motion intensity with criteria such as peak ground
acceleration (PGA). The seismic hazard can be analyzed by using two approaches: deterministic seismic hazard
analysis (DSHA) and probabilistic seismic hazard analysis (PSHA). In these two
approaches, the seismic hazard is evaluated from past earthquake events and
active faults data. In Thailand, seismic hazard is classified in the low lying regions; however, in recently years,
earthquakes have occurred frequently in the North of Thailand. To prevent and
reduce damage due to earthquakes in the future, determination of seismic hazard is needed. This research
proposes a deterministic
seismic hazard map evaluated from nineteen active faults affecting Thailand. Two types of active faults are
considered: first, an active fault in a subduction zone and second, a crustal fault. The seismic
hazard is evaluated by using a ground motion prediction equation (GMPEs). Four GMPEs are weighted equally for
seismic crustal fault, and two GMPEs are weighted equally for a seismic subduction zone. The
hypocentral distance is used to evaluate the seismic hazard for all ground
motion prediction equations. The Northern part and the Western part of Thailand
are high seismic hazard regions, because there are active faults with the large
possibility of earthquakes of a maximum magnitude. The seismic hazards in the North, West and Northeast of
Thailand are about 0.60 g. The seismic hazard in Bangkok is about 0.25 g due to the Three Pagoda fault and Sri
Sawat fault. The seismic hazard in the South of Thailand is about 0.40 g. |
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ISSN: | 2086-9614 2087-2100 |