Microzonation of Greater Bangkok Using Microtremor Technique

Tuladhar, Rabin, Yamazaki, Fumio, and Warnitchai, Pennung (2009) Microzonation of Greater Bangkok Using Microtremor Technique. Lambert Academic Publishing, Germany.

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Abstract

Bangkok, the capital city of Thailand, is located at a remote distance from seismic sources. However, it has a substantial risk from these distant earthquakes due to the ability of the underlying soft clay to amplify ground motions. Seismic microzonation of big cities, like Bangkok, provides a basis for site-specific hazard analysis, which can assist in systematic earthquake mitigation programs. In this study, a seismic microzonation map fro the greater Bangkok area was constructed using microtremor observations. Microtremor observations were carried out at more than 150 sites in the greater Bangkok area. The predominant periods of the ground were determined from the horizontal to vertical (H/V) spectral ratio technique. A microzonation map was then developed for the greater Bangkok area based on the observations. The study shows that there is a great possibility of long-period ground vibration in Bangkok, especially in the areas near the Gulf of Thailand. This may have severe effects on long-period structures, such as high-rise buildings and long-span bridges.

Item ID: 18395
Item Type: Book (Research - A1)
ISBN: 978-3-8383-1127-2
Keywords: microzonation, Bangkok, earthquake, microtremor, H/V spectral ratio
Date Deposited: 10 Sep 2011 21:57
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090504 Earthquake Engineering @ 50%
09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 30%
09 ENGINEERING > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering @ 20%
SEO Codes: 87 CONSTRUCTION > 8702 Construction Design > 870201 Civil Construction Design @ 20%
87 CONSTRUCTION > 8703 Construction Materials Performance and Processes > 870301 Cement and Concrete Materials @ 60%
87 CONSTRUCTION > 8704 Construction Processes > 870401 Civil Construction Processes @ 20%
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