Development of a seismic risk map for the structural design code in Thailand | |
| Author | Lisantono, Ade |
| Call Number | AIT Thesis no.ST-94-14 |
| Subject(s) | Structural design Buildings--Earthquake effects |
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | For constructing a seismic zoning map, three main works should be done: (1) first establishing a magnitude-recurrence relationship; (2) formulating an appropriate attenuation model for area under consideration; and (3) deriving a probabilistic method for estimating parameters of ground motion. In practice, the incompleteness of earthquake data in some interval period, sometimes make it difficult to determine the magnitude-recurrence relationship. Therefore, the technique for establishing a magnitude-recurrence relationship from incomplete earthquake data which was proposed by STEPP in 1972 was applied. Seismic source zone calibrated by NUT ALAYA in 1985 was employed in this study for defining the earthquake sources. Then the magnitude-recurrence relationship in each seismic source zone was established. A study of attenuation models from isoseismal map was conducted. Two cases of the attenuation models were studied. The first one did not consider the site amplification factor while in the second, it was taken into consideration. These two cases of attenuation models were investigated and checked with the field records. Comparison with the various attenuation models was also conducted in order to get the most suitable attenuation model for Thailand. It was observed that Esteva's attenuation model was still more reliable than the others. With the magnitude-recurrence relationship and the attenuation model, the probabilistic model of peak acceleration of ground motion was derived. The probabilistic model proposed by CORNELL in 1968 was employed in this study. However, this method assumes that the distribution of earthquake magnitude was unbounded, that is no limit on upper bound earthquake magnitude, which is rather unrealistic for the analysis. Therefore a window function was introduced in this study for truncation the upper bound of magnitude. By using this model, the peak ground acceleration map with 10 % probability of exceedance in 50 years period were computed. Finally, the seismic risk map of Thailand with zone factor for structural design code was constructed. |
| Year | 1994 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pennung Warnitchai |
| Examination Committee(s) | Worsak Kanok-Nukulchai ;Taweep Chaisomphob ;Kamol Vajarasathira ; Jiaru, Qian |
| Scholarship Donor(s) | Atma Jaya Yogyakarta University Indonesia |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1994 |