Effect of seismic retrofitting on seismic fragility of low-rise RC school buildings in Chiang Mai | |
| Author | Regmi, Lila |
| Call Number | AIT Thesis no.ST-24-23 |
| Subject(s) | School buildings--Earthquake effects--Thailand--Chiang Mai 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 | The study focuses on seismic vulnerability of reinforced concrete (RC) low-rise school buildings in Chiang Mai, Thailand, with the aim of developing seismic fragility curves.Although the city has not experienced a major earthquake in recent history. As one of the oldest cities, many of its buildings, including schools, were not constructed following modern seismic design codes, making them highly susceptible to seismic events. Given the significant number of occupants, particularly children, this study prioritizes school buildings to address safety concerns.The analysis was conducted using the Uncoupled Modal Response History Analysis (UMRHA) approach, a computationally efficient alternative to the Nonlinear Response History Analysis (NLRHA), which is heavy computing and time-consuming. Responses were obtained by performing UMRHA using ground motions scaled based on the Conditional Mean Spectrum (CMS) approach.These responses were then plotted using the Multiple Stripe Analysis (MSA) approach and fragility functions were generated using the maximum likelihood method. These fragility curves were developed for various intensity measures, including Peak Ground Acceleration (PGA), Sa(T), and Sa(1.5T). To enhance the seismic performance of the structures, column jacketing was implemented on the first-floor columns. Seismic fragility curves were then developed for the retrofitted buildings and compared with the original structures. The results demonstrate significant improvements in mitigating complete damage at the Maximum Considered Earthquake (MCE) level following retrofitting. This study highlights the importance of retrofitting and provides a practical methodology for evaluating and enhancing the seismic resilience of vulnerable school buildings in seismic-prone regions. |
| Year | 2024 |
| 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 |
| Examination Committee(s) | Thanakorn Pheeraphan;Punchet Thammarak;Krishna, Chaitanya |
| Scholarship Donor(s) | Asian Institute of Technology (Thailand);Computers & Structures, Inc. (USA) |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2024 |