Multidirectional seismic response of a curved highway bridge model
A continuing experimental model study relating to the seismic resistance of large multi-span curved overcrossings is reported.
A brief description of the microconcrete model, a 1/30 true-scale version of a hypothetical prototype, which was tested on the 20 ft x 20 ft (6.1 m) Shaking Table at the University of California, is given. The response of the model is described for a series of simulated seismic excitations applied
(i) horizontally in the asymmetric longitudinal direction, and
(ii) horizontally in the symmetric direction, both alone and also with simultaneous vertical excitation.
The influence of expansion joint design on the seismic behaviour is the main parameter studied, with emphasis on the need for joint restrainers of adequate ductility, to effectively tie adjacent girders together. However, because of the severe damage caused by impacting at the expansion joints during moderately strong excitation, it is concluded that expansion joints should ideally be omitted from such structures.
Iwasaki, T., Penzien, J., Clough, R., "Literature Survey - Seismic Effects on Highway Bridges", EERC 71-11, Earthquake Engineering Research Center, University of California, Berkeley, November 1972, or FHWA-RD-73-13, Federal Highway Administration, November 1972.
Jennings, P. C, "Engineering Features of the San Fernando Earthquake, February 9, 1971", EERL 71-20, Earthquake Engineering Research Laboratory, California Institute of Technology, June 1971.
California State Division of Highways, "Report on Evaluation and Modification of Earthquake Resistant Design Criteria", Internal Report of the Bridge Department, March, 16, 1971.
California State Division of Highways, "Bridge Planning and Design Manual", Vol. 1 - Design Specifications, Sect. 2-25, November, 1972.
Tseng, W. S., Penzien, J., "Analytical Investigations of the Seismic Response of Long, Multiple-Span Highway Bridges", EERC 73-12, Earthquake Engineering Research Center, University of California, Berkeley, June, 1973 , or FHWA-RD-74-3, Federal Highway Administration, January, 1974.
Chen, M. C., Penzien, J., "Analytical Investigation of the Seismic Response of Short, Simple or Multiple-Span Highway Bridges", EERC Report in preparation, Earthquake Engineering Research Center, University of California, Berkeley.
Williams, D., Godden, W. G., "Experimental Model Studies on the Seismic Response of High Curved Overcrossings", EERC Report in preparation. Earthquake Engineering Research Center, University of California, Berkeley.
Williams, D., Godden, W. G., "Seismic Response of a Curved Highway Bridge Model", Fifty-fourth Annual Meeting, Transportation Research Board, National Research Council, Washington, D.C., January, 1975.
Rea, D., Penzien, J., "Dynamic Response of a 20 ft x 20 ft Shaking Table", Proceedings, Fifth World Conference on Earthquake Engineering, Rome, June, 1973.
Rea, D., Penzien, J., "Structural Research Using an Earthquake Simulator", Proceedings of the Structural Engineers Association of California, Monterey, California, October, 1972.
Ruiz, P., Penzien, J., "Stochastic Seismic Response of Structures", J. Eng. Mech. Div., ASCE, Vol. 97, No. EM2, 1971, or "Probabilistic Study of the Behaviour of Structures During Earthquakes", EERC 69-3, Earthquake Engineering Research Center, University of California, Berkeley, March, 1969.
Chopra, A. K., Bertero, V. V., Mahin, S., "Response of the Olive View Medical Center Main Building During the San Fernando Earthquake", Proceedings, Fifth World Conference on Earthquake Engineering, Rome, June, 1973.
Copyright (c) 1976 D. Williams, W. G. Godden
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