Pullback Testing of Seismically Isolated P/C I-Girder Bridge
Publication: Journal of Structural Engineering
Volume 124, Issue 8
Abstract
Dynamic testing was performed on a highly skewed, three-span, seismically isolated, prestressed concrete, slab-on-girder bridge. The pullback, quick-release method of testing was used, a first for this bridge type. Several new developments facilitated the quick-release testing. A simple new quick-release mechanism was employed with relatively low lateral test force. Also, a new method of attaching the pullback cable to the bridge was implemented. After testing, a three-dimensional finite element model of the bridge was created. An optimization program was used to refine, or calibrate, the model to match experimentally determined natural frequencies and mode shapes. This automated, systematic optimization of model parameters produced an accurate analytical representation of the bridge. Mode shapes and frequencies from the experimental and analytical investigations are presented.
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References
1.
Buckle, I. G., and Mayes, R. L.(1990). “Seismic isolation: History, application, and performance—a world view.”Earthquake Spectra, 6(2), 161–201.
2.
Chen, S. S., Mander, J. B., Mahmoodzadegan, B., and MacEwan, D. S. (1993). “Quick-release behavior of two eastern U.S. highway bridges.”Proc., 10th Annu. Int. Bridge Conf., Engineers' Society of Western Pennsylvania, Pittsburgh, Pa., 175–182.
3.
Chopra, A. K. (1995). Dynamics of structures: Theory and applications to earthquake engineering. Prentice-Hall, Inc., Englewood Cliffs, N.J.
4.
Clough, R. W., and Penzien, J. (1975). Dynamics of structures. McGraw-Hill, Inc., New York, N.Y.
5.
Douglas, B. M. (1976). “Quick release pullback testing and analytical seismic analysis of a six-span composite girder bridge.”Engrg. Rep. No. 44, Dept. of Civil Engineering, University of Nevada, Reno, Nev.
6.
Frangopol, D. M., and Klisinski, M.(1989). “Material behavior and optimum design of structural systems.”J. Struct. Engrg., ASCE, 115(5), 1054–1075.
7.
“Inertial products division.” (1992). Columbia Bulletin 103, Columbia Research Laboratories, Woodlyn, Pa.
8.
Jacoby, S. L. S., Kowalik, J. S., and Pixxo, J. T. (1972). Iterative methods for nonlinear optimization problems. Prentice-Hall, Inc., Englewood Cliffs, N.J., 73–93.
9.
Johnston, A. C.(1982). “A major earthquake zone on the Mississippi.”Scientific Am., 246(4), 60–68.
10.
Johnston, A. C., and Nava, S. J. (1985). “Recurrence rates and probability estimates for the New Madrid seismic zone.”J. Geophys. Res., 90(B8), 6737–6753.
11.
Robson, B. N. (1990). “Predicting structural response in highway bridges,” MS thesis, University of Colorado, Boulder, Colo.
12.
Robson, B. N., Dow, J. O., Frangopol, D. M., O'Fallon, J., and Goble, G. G. (1992). “Realistic modeling of highway bridges.”8th U.S.-Japan Bridge Engrg. Workshop, Chicago, Ill., 384–395.
13.
Robson, B. N., Frangopol, D. M., and Goble, G. G. (1991). “Optimized models for predicting structural response in highway bridges.”Proc., Tenth Conf. on Electronic Computation, ASCE, Reston, Va., 223–230.
14.
Robson, B. N., Frangopol, D. M., and Goble, G. G. (1992b). “Improving correlation between experimental bridge strains and analytical models through optimization.”Third Int. Workshop on Bridge Rehabilitation, Ernst and Sohn, Berlin, Germany, 559–570.
15.
Rosenbrock, H. H.(1960). “An automatic method for finding the greatest or least value of a function.”Comp. J., 3, 175–184.
16.
SAP90 6.0 Beta Release user's manual. (1995). Computers & Structures, Inc., Berkeley, Calif.
17.
Standard specifications for highway bridges. (1996). American Association of State Highway and Transportation Officials, Washington, D.C.
18.
Street. R., et al. (1996). “Source zones, recurrence rates, and time histories for earthquakes affecting Kentucky.”Res. Rep. KTC-96-4, Kentucky Transportation Center, University of Kentucky, Lexington, Ky.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 124 • Issue 8 • August 1998
Pages: 930 - 937
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Aug 1, 1998
Published in print: Aug 1998
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