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035			_a.b12474174
099		9	_aAIT Thesis no.ST-25-19
100	1		_aDhami, Sabita
245	1	0	_aDevelopment of a numerical optimization framework to identify optimal seismic resistant column jacketing configurations in low-rise buildings
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2025
300			_a81 leaves : _bill.+ _e1 online resource
490	1		_aThesis ; _vno. ST-25-19
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering
502			_aThesis (M. Eng.) - Asian Institute of Technology, 2025
520			_aThis study presents a development of a numerical optimization framework for identifying the optimal column-jacketing strategy to enhance the seismic performance of a multi-story reinforced concrete structure.The work is focused on determining both the most effective locations of columns to be retrofitted with reinforced concrete (RC) jackets and the corresponding optimal jacket thicknesses using gradient-based numerical optimization technique. The case-study structure is a two-story building with an irregular arrangement of infilled walls in the ground floor, resulting in a soft-story condition.To improve computational efficiency, optimization is performed on two linear models with infill walls represented as equivalent struts using upper- and lower-bound elastic moduli,capturing both stiff and weak infill conditions.Three ground motions with short, moderate, and long predominant periods are considered. The framework begins with a stepwise optimization where multiple retrofit configurations are tested, followed by simultaneous optimization of column locations and jacket sizes using binary variables with a penalty function. A single retrofit scheme that satisfies constraints for all ground motions and both linear model variants is then selected.To evaluate the realism of linear-model-based optimization results, a nonlinear model is developed using the most effective solution and subjected to nonlinear time-history analysis.Comparing linear and nonlinear responses helps assess whether the linear-based optimum solution reflects true structural behavior.Overall, this study demonstrates a systematic and practical methodology for determining optimal column-jacketing configurations in multi-story buildings, contributing toward more reliable and faster seismic retrofit decision-making.
650		0	_aEarthquake resistant design
650		0	_aReinforced concrete construction
650		0	_aColumns, Concrete _xTesting
700	0		_aPennung Warnitchai, _eChairperson
700	1		_aKrishna, Chaitanya, _eExamination Committee
700	1		_aAnwar, Naveed, _eExamination Committee
710	2		_aComputer and Structures Inc.(CSI), USA, _eScholarship Donor
710	2		_aAIT Scholarship, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. ST-25-19
856	4	0	_3Full-Text _uhttp://203.159.5.9/ait-thesis/Viewer/viewer.php?id=B23425
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909			_aBarcode : - _bCREATED : 2026-02-02 _cRECORD # : i13570766 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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