| Author | Govindasamy, Anand V. |
| Call Number | AIT Thesis no. GE-00-10 |
| Subject(s) | Earthquake hazard analysis--Mathematical models
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-00-10 |
| Abstract | The major part of ground shaking during earthquakes is due to the upward
propagation of shear waves. However, it is difficult to consistently predict the response of
soil deposits to these waves in a convenient and reliable manner due to the non-linear
behavior of soil during large earthquakes. Three techniques, i.e. Non-linear Direct
Integration Method, Equivalent Linear Direct Integration Method and Equivalent Linear
Harmonic Vibration Method were analyzed and the applicability of the equivalent linear
method to large earthquakes evaluated. The analysis was done using actual earthquake
vibrations. It was found that the conventional equivalent linear method contains some
deficiencies when applied to large earthquakes. The deficiencies are overestimation of
peak acceleration under large earthquakes and underestimation of amplification factor at
high frequency region. To overcome these shortages the equivalent linear method was
subsequently modified. For large earthquakes, the procedure of obtaining equivalent
shear strain from maximum shear strain was modified where the conventional equivalent
shear strain constant of 0.65 is modified to 1.00. For underestimation of amplification
factor, the shear strain is taken as a function of frequency to overcome the frequency
dependent characteristics of the shear strain induced in the ground. It was found that the
modified equivalent linear method shows good agreement with the non-linear method. |
| Year | 2001 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-00-10 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Takemura, Jiro;Miura, Kinya; |
| Examination Committee(s) | Bergado, Dennes T. ;Noppadol Phien-wej ; |
| Scholarship Donor(s) | Asian Institute of Technology (Partial Scholarship); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2001 |