The effect of a large podium on a tall building's seismic response subjected to far-fault ground motion | |
| Author | Sok, Thearith |
| Call Number | AIT Thesis no.ST-25-03 |
| Subject(s) | Tall buildings--Earthquake effects Earthquake resistant design Earthquake engineering Structural engineering |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | This study evaluates the seismic performance of a 45-story reinforced concrete core wall building with varying podium-tower configurations under Far-Fault (FF) ground motions. Using both Linear Time History Analysis (LTHA) and Nonlinear Time History Analysis (NLTHA), the research investigates key response parameters such as story shear along the height, floor acceleration, diaphragm in-plane shear, and localized seismic demand fluctuating in columns.The presence of a large podium significantly influences the structural behavior, resulting in increased acceleration demands at the podium interface and shifting shear forces from core walls to perimeter columns. Diaphragm shear demands at the podium interface level are found to exceed PEER-ATC limits in most configurations, particularly near the top surface. NLTHA results show a redistribution of internal forces and slightly reduced shear demands compared to LTHA, but both confirm critical stress concentrations in the podium region.Additionally, the study highlights changes in chord rotations of coupling beams and rebar strains at core wall corners, which remain within permissible limits but show localized intensities at certain levels. For benchmarking purposes, limited comparisons with Near-Fault (NF) ground motion data obtained from a peer study further illustrate the relative intensity and distribution differences.Overall, the findings underscore the importance of accounting for podium effects in high-rise buildings and offer insights for improving seismic design strategies under far fault conditions. |
| Year | 2025 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Krishna, Chaitanya;Anwar, Naveed (Co-chairperson) |
| Examination Committee(s) | Pennung Warnitchai;Thanakorn Pheeraphan |
| Scholarship Donor(s) | AIT Scholarship |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2025 |