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http://dx.doi.org/10.5000/EESK.2005.9.3.023

Displacement-based Seismic Assessment and Rehabilitation of Asymmetric Wall Structures  

Hong, Sung-Gul (서울대학교 공과대학 건축학과)
Ha, Tae-Hyu (서울대학교 공과대학 건축학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.9, no.3, 2005 , pp. 23-32 More about this Journal
Abstract
Torsional behavior of eccentric structure under seismic leading may cause the stress and/or deformation concentration, which arouse the failure of the structure in an unexpected manner. This study suggests D-R relationship which shows the overall displacement and rotation of the system based on the ultimate displacement capacity of the each lateral load resistant member. Using the suggested D-R relationship and displacement spectrum, the seismic assessment is conducted and verified in comparison with the time history analysis result. Multi-level seismic assessment Is considered which takes multiple seismic hazard levels and respective performance levels into account. Finally, based on the seismic assessment result, seismic rehabilitation process is presented. In this research, two rehabilitation methods are considered. One is done by means of stiffening/strengthening the seismic resistant members, and the other is based on the member ductility. Especially, in the first method, to optimize the rehabilitation result, the rehabilitation problem is modeled as an optimization problem, and solved using BFGS quasi-Newton optimization method.
Keywords
torsional behavior; wall structures; D-R relationship; rotation angle; displacement spectrum; seismic assessment; seismic rehabilitation; BFGS Quasi-Newton optimization method;
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