New Measure for Severity of Near-Source Seismic Ground Motion
Publication: Journal of Structural Engineering
Volume 132, Issue 12
Abstract
In order to estimate seismic hazards, there is a need for measures that properly characterize the severity of ground motions. Such measures are used along with the fragility of structures to estimate the probability of failure. Structures subjected to severe seismic ground motions undergo inelastic response. Proper measures of ground motions are required to be well correlated with responses of interest. In this paper, it is shown that modeling a near-source ground motion, by a simple pulse form that matches well with the main velocity pulses of the ground motion, dose not lead to a reliable prediction of the inelastic response of structures having periods of less than about . An equivalent rectangular acceleration pulse, called the significant peak ground acceleration (SPGA), is defined. Compared to other available measures, the SPGA correlates significantly better with the inelastic response of structures (having periods of less than about and displacement ductility of at least two). Subsequently, using the main characteristics of structures, a relationship between the SPGA and the response of reinforced concrete (RC) structures is developed. It is shown that the relationship reliably predicts the inelastic response of the structures to pulse-type ground motions. Finally, the efficiency of the SPGA in estimating the fragility of an RC structural wall is compared to that of elastic response spectrum. Given the fact that in the United States about 99.8% of office buildings are less than ten stories, the SPGA and the corresponding demand models for estimating the response of such structures can considerably improve the seismic design and assessment of structures.
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References
Alavi, B., and Krawinkler, H. (2001). “Effects of near-field ground motion on building structures.” Rep. Prepared for CUREE-Kajima Joint Research Program Phase III, CUREE, Richmond, Calif.
Alavi, B., and Krawinkler, H. (2004). “Behavior of moment-resisting frame structures subjected to near-fault ground motions.” Earthquake Eng. Struct. Dyn., 33, 687–706.
American Concrete Institute (ACI). (2002). “Building code requirements for structural concrete and commentary.” ACI 318, Framingham Hills, Mich.
Anderson, J. C., and Bertero, V. V. (1987). “Uncertainties in establishing design earthquakes.” J. Struct. Eng., 113(8), 1709–1724.
Applied Technology Council (ATC). (1978). “Tentative provisions for the development of seismic regulations for buildings.” ATC 3-06, Calif.
Bertero, V. V., Herrera, R. A., and Mahin, S. A. (1976). “Establishment of design earthquakes—Evaluation of present methods.” Proc., Int. Symp. on Earthquake Structural Engineering, St. Louis.
Bolt, B. A. (1975). “Chapter 21: San Fernando Earthquake, 1971.Magnitudes, aftershocks, and fault dynamics.” Bulletin 196, California Division of Mines and Geology, Calif.
Bolt, B. A. and Abrahamson, N. A., and (2003). “Chapter 59: Estimation of strong seismic ground motions.” International handbook of earthquake and engineering seismology, W. H. K. Lee, H. Kanamori, P. C. Jennings, and C. Kisslinger, eds., Academic, London.
Box, G. E. P., and Tiao, G. C. (1992). Bayesian inference in statistical analysis, Addison-Wesley, Reading, Mass.
Department of Energy. (2002). “1999 commercial buildings energy consumption survey (CBECS).” ⟨http://www.eia.doe.gov/emeu/cbecs/detailed_tables_1999.html⟩ (July 14, 2004).
Der Kiureghian, A. (1999). “A Bayesian framework for fragility assessment.” Proc., 8th Int. Conf. on Applications of Statistics and Probability (ICASP) in Civil Engineering Reliability and Risk Analysis, R. E. Melchers and M. G. Stewart, eds., Sidney, Australia, Vol. 2, 1003–1010.
International Conference of Building Officials (ICBO). (1997). Uniform building code, Vol. 2, Whittier, Calif.
Mahin, S. A., and Bertero, V. V. (1981). “An evaluation of inelastic seismic design spectra.” J. Struct. Div., 107(9), 1777–1795.
Makris, N., and Chang, S. (2000). “Effect of viscous, viscoplastic, and friction damping on the response of seismic isolated structures.” Earthquake Eng. Struct. Dyn., 29(1), 85–107.
Park, R., Priestley, M. J. N., and Gill, W. D. (1982). “Ductility of square-confined concrete columns.” J. Struct. Div., 108(4), 929–950.
Sasani, M. (2001). “Reliability and performance-based seismic design, assessment, and rehabilitation of RC structures located near active faults.” Ph.D. dissertation, Univ. California, Berkeley, Calif.
Sasani, M., and Der Kiureghian, A. (2001). “Seismic fragility of reinforced concrete structural walls: Displacement approach.” J. Struct. Eng., 127(2), 219–228.
Sasani, M., Der Kiureghian, A., and Bertero, V. V. (2002). “Seismic fragility of short period reinforced concrete structural walls under near-source ground motions.” Struct. Safety, 24(2), 123–138.
Somerville, P. G., Smith, N. F., Graves, R. W., and Abrahamson, N. A. (1997). “Modification of empirical strong ground motion attenuation relations to include the amplitude and duration effects of rupture directivity,” Seismol. Res. Lett., 68(1), 199–222.
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© 2006 ASCE.
History
Received: Nov 14, 2005
Accepted: Jan 19, 2006
Published online: Dec 1, 2006
Published in print: Dec 2006
Notes
Note. Associate Editor: Vinay Kumar Gupta
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