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http://dx.doi.org/10.5000/EESK.2002.6.1.043

Deformation Based Seismic Design of Asymmetric Wall Structures  

홍성걸 (서울대학교 건축학과)
조봉호 (서울대학교 건축학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.6, no.1, 2002 , pp. 43-53 More about this Journal
Abstract
Current torsional provisions focus n restricting torsional effect of asymmetric wall structures by proportioning strength of wall based on the traditional assumption that stiffness and strength are independent. Recent studies have pointed out that stiffness of structural wall is dependent on the strength. This implies that actual stiffness of walls can be determined only after torsional design is finished and current torsional provisions may result in significant errors. To overcome this shortcoming, this paper proposes deformation based torsional design for asymmetric wall structures. Contrary to the current torsional provisions, deformation-based torsional design uses displacement and rotation angle as design parameters and calculates base shear for inelastic torsional response directly. Main purpose of deformation based torsional design is not to restrict torsional response but to ensure intended torsional mechanism according to the capacity design concept. Because displacement and rotation angle can be used as performance criteria indicating performance level of asymmetric structures, this method can be applied to the performance based seismic design effectively.
Keywords
torsional mechanism; deformation based torsional design; structural walls; constant yield curvature assumption; performance based seismic design;
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