The effect of a large podium on a tall building's seismic response subjected to near-fault pulse-like ground motions | |
| Author | Ly, Chhayleang |
| Call Number | AIT Thesis no.ST-25-09 |
| Subject(s) | Tall buildings--Design and construction Tall buildings--Earthquake effects Earthquake resistant design |
| 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 examines the seismic response of a 45-story reinforced concrete core wall structure with various podium-tower configurations subjected to near-fault pulse-like ground motions. Both Linear Time History Analysis (LTHA) and Nonlinear Time History Analysis (NLTHA) are employed to evaluate critical response parameters, including shear demands on shear walls and columns, inter-story drift, floor acceleration, diaphragm in-plane shear, and localized force redistribution.The inclusion of a large podium notably alters structural behavior, leading to elevated acceleration demands at the podium-tower interface and a shift in shear forces from core walls to perimeter columns. Diaphragm shear at this interface often exceeds the PEER-ATC threshold, especially near the upper podium levels. While NLTHA indicates a redistribution of internal forces and slightly lower shear demands than LTHA, both analyses confirm the presence of significant stress concentrations in the podium region.Furthermore, variations in chord rotations of coupling beams and axial strains in core wall reinforcement were observed. Although these remained within allowable limits, localized intensities were apparent at specific elevations. For comparative insight, selected results were benchmarked against Far-Fault (FF) ground motion data from a related study, illustrating the relative differences in demand distribution and magnitude.In conclusion, the findings emphasize the critical role of podium configurations in tall building seismic performance and contribute valuable guidance for enhancing design practices under near-fault seismic 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) | Pennung Warnitchai;Anwar, Naveed (Co-chairperson) |
| Examination Committee(s) | Thanakorn Pheeraphan;Krishna, Chaitanya |
| Scholarship Donor(s) | Loom Nam Khong Pijai (Greater Mekong Subregion) Scholarships |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2025 |