Seismic torsional effects on buildings
DOI:
https://doi.org/10.5459/bnzsee.9.1.79-83Abstract
This paper gives the background to the seismic torsional provisions of the New Zealand Loadings Code. These provisions attempt to deal with three effects: accidental eccentricity, torsional ground motion, and coupling between torsional and translational modes. The first two effects lead to an effective eccentricity of one-tenth of the width of a building, while the third leads to a parabolic function of the calculated eccentricity: this was obtained by applying existing results for torsional amplification to a number of typical building structures.
References
'Earthquake Resistant Regulations of the World - A World List 19731 , International Association of Earthquake Engineering, Tokyo, 1973.
Newmark, N. M. and Rosenblueth, E., 'Fundamentals of Earthquake Engineering', Prentice-Hall, 1971.
Newmark, N.M., 'Torsion in Symmetric Buildings', Proc. 4th World Conf. on Earthquake Engineering, Chile, V.2., A-3 pp 19-32.
Elorduy, J. and Rosenblueth, E., 'Torsiones Sismicas en Edeficios de Un Pisco', Report 164, Instituto de Ingenieria, Universidad Nacional Autonoma de Mexico, April 1968.
Hoerner, J. B., 'Modal Coupling and Earthquake Response of Tall Buildings', Calif. Inst, of Technology, Report EERL 71-07, 1971.
Penzien, J., 'Earthquake Response of Irregularly Shaped Buildings', Proc. 4th World Conf. on Earthquake Engineering, Chile, V.2, A-3, pp 75-88.
Penzien, J. and Chopra, A. K., "Earth- quake Response of Appendage on a Multi- Storey Building", Proc. 3rd World Conf. on Earthquake Engineering, N.Z., V.II, pp 476-486, 1965.
Skinner, R. I., Skilton, D.W.C. and Laws, D. A., 'Unbalanced Buildings, and Buildings with Light-Towers, Under Earthquake Forces', Proc. 3rd World Conference on Earthquake Engineering, N.Z. V.II, pp 586-602.
