Browse > Article
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;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Tso, W. K. and Smith, R. S. H., “Re-evaluation of seismic torsional provisions,” Earthquake Engng. Struct. Dyn., Vol. 28, 1999, pp. 899-917.   DOI   ScienceOn
2 Chandler, A. M. and Duan, X. N., “Performance of asymmetric code-designed buildings for serviceability and ultimate limit states,” Earthquake Engng. Struct. Dyn., Vol. 26, 1997, pp. 717-735.   DOI   ScienceOn
3 Priestley, M. J. N. and Paulay, T., Seismic Design of Reinforced Concrete and Masonry.
4 Paulay, T., “A simple displacement compatibility-based seismic design strategy for reinforced concrete buildings,” 12th World Conference on Earthquake Engineering, Paper 0062, 2000.
5 Paulay, T., “Torsional mechanisms in ductile building systems,” Earthquake Engng. Struct. Dyn., Vol. 27, 1998, pp. 1101-1121.   DOI   ScienceOn
6 Priestley, M. J. N. and Kowalsky, M. J., “Aspects of drift and ductility capacity of rectangular cantilever structural walls,” Bulletin, New Zealand National Society for Earthquake Engineering, Vol. 31, 1998, pp.73-85.
7 SANZ(Standards Association of New Zealand), NZS 4203 : General Structural Design and Design Loadings for Buildings, Wellington, 1992.
8 Wallace, J. W. and Thomsen IV, J. H., “Seismic design of RC structural walls; Part I: New code format, Part II: Application,” Journal of Structural Engineering, ASCE, Vol. 120, No. 3, 1995.
9 Uniform Building Code, International Conference of Building Officials, Whittier, California, 1997.
10 Cho, B. H. and Hong, S. G., “Displacement based seismic design of aymmetric-plan buildings,” KEERCMAE Joint Seminar on Risk Mitigation for Regions of Moderate Seismicity, University of Illinois at Urbana-Champaign, 2001, pp. 361-370.
11 Bluebook SEAOC, “Guidelines for performance-based seismic engineering,” SEAOC Blue Book-draft of Appendix I, 1999.
12 Panagiotakos, T. B. and Fardis, M. N., “Deformations of reinforced concrete members at yielding and ultimate,” ACI Structural Journal, Vol. 98, No. 2, 2001, pp. 135-148.
13 CEN Techn. Comm. 250/SC8, Eurocode 8: Earthquake-Resistant Design of Structures, CEN, Berlin, 1995.
14 Priestley, M. J. N. and Kowalsky, M. J., “Direct displacement-based seismic design of concrete buildings,” Bulletin, New Zealand National Society for Earthquake Engineering, Vol. 33, 2000, pp. 421-444.
15 Humar, J. L. and Kumar, P., “Effect of orthogonal inplane structural elements on inelastic torsional response,” Earthquake Engng. Struct. Dyn., Vol. 28, 1999, pp. 1071-1097.   DOI   ScienceOn
16 ATC, “NEHRP guidelines for the seismic rehabilitation of buildings,” FEMA Report 273, Applied Technology Council for the Building Seismic Safety Council, Washington, D.C, 1997.