| Author | Tuladhar, Rabin |
| Call Number | AIT Thesis no.ST-02-4 |
| Subject(s) | Earthquake hazard analysis Thailand Bangkok
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Engineering. |
| Publisher | Asian Institute of Technology |
| Abstract | Bangkok, the capital city of Thailand, is located at a remote distance from seismic sources.
However, it has a substantial risk from distant earthquakes due to the ability of underlying
soft clay to amplify ground motions. It is therefore imperative to conduct a detailed
seismic hazard assessment of the area. Seismic microzonation of big cities, like Bangkok,
provides a basis for site-specific risk analysis, which can assist in mitigating earthquake
damages. In this study, a seismic microzonation map for Greater Bangkok is constructed
using Microtremor Technique.
Microtremor observations were conducted at more than 150 sites around Greater Bangkok.
The predominant periods of the ground were determined from the horizontal to vertical
(H/V) spectral ratios of microtremors and a microzonation map was developed for Greater
Bangkok on the basis of the variation of the predominant period. Moreover, equivalent
linear analysis was carried out for available soil profiles at different sites using the
computer program Shake91 to validate the results from microtremor measurements. The
study manifests that the lower-central plain in Greater Bangkok, underlain by thick, soft
clay layer, has remarkably long predominant period. However, the period decreases at the
boundary of the plain. The study exhibits the possibility of long-period ground vibrations
in Bangkok due to distant eaithquakes, which might have severe effects on the structures
especially those with long natural periods like high-rise buildings and long-span bridges.
The results from this study are expected to serve as a basis for a detailed seismic hazard
assessment of the city. |
| Year | 2002 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Yamazaki, Fumio;Pennung Warnitchai |
| Examination Committee(s) | Worsak Kanok-Nukulchai;Pichai Nimityongskul |
| Scholarship Donor(s) | Government of Japan |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2002 |