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http://dx.doi.org/10.12652/Ksce.2015.35.4.0759

Seismic Behavior of Bridges Considering Ground Motion Spatial Variation  

Bae, Byung Ho (Korea Infrastructure Safety Corporation)
Choi, Kwang Kyu (Donga University)
Kang, Seung Woo (Donga University)
Song, Si Young (Donga University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.35, no.4, 2015 , pp. 759-768 More about this Journal
Abstract
The ground motions of large dimensional structures such as long span bridges at different stations during an earthquake, are inevitably different, which is known as the ground motion spatial variation effect. There are many causes that may result in the spatial variability in seismic ground motion, e.g., the wave passage effect due to the different arrival times of waves at different locations; the loss of coherency due to seismic waves scattering in the heterogeneous medium of the ground; the site amplification effect owing to different local soil properties. In previous researches, the site amplification effects have not been considered or considered by a single-layered soil model only. In this study, however, the ground motion amplification and filtering effects are evaluated by multi-layered soil model. Spatially varying ground motion at the sites with different number of layers, depths, and soil characteristics are generated and the variation characteristics of ground motion time histories according to the correlation of coherency loss function and soil conditions are evaluated. For the bridge system composed of two unit bridges, seismic behavior characteristics are analyzed using the generated seismic waves as input ground motion. Especially, relative displacement due to coherency loss and site effect which can cause the unseating and pounding between girders are evaluated. As a result, considering the soil conditions of each site are always important and should not be neglected for an accurate structural response analysis.
Keywords
Spatial variation of ground motion; Wave passage; Coherency loss; Site amplification; Seismic behavior characteristics;
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  • Reference
1 Abrahamson, N. A., Schneider, J. F. and Stepp, J. C. (1991). "Empirical spatial coherency functions for applications to soilstructure interaction analyses." Earthquake Spectra, Vol. 7, No. 1, pp. 1-27.   DOI
2 Atkinson, K. E. (1978). An introduction to numerical analysis, Jhon Wiley and Sons, New York, N.Y.
3 Bi, K. and Hao, H. (2012). "Modelling and simulation of spatially varying earthquake ground motions at sites with varying conditions." Probabilistic Engineering Mechanics, Vol. 29, pp. 92-104.   DOI
4 Bi, K., Hao, H. and Chouw, N. (2010). "Required separation distance between decks and at abutments of a bridge crossing a canyon site to avoid seismic pounding." Earthquake Engineering and Structural Dynamics, Vol. 39, No. 3, pp. 303-323.   DOI
5 Chouw, N. and Hao, H. (2008) "Significance of SSI and nonuniform near-fault ground motions in bridge response I: Effect on Response with Conventional Expansion Joint." Engineering and Structures, Vol. 30, No. 1, pp. 141-153.   DOI
6 Clough, R. W. and Penzien, J. (1993). Dynamics of structures, McGraw Hill, New York, N.Y.
7 Deodatis, G. (1996). "Non-stationary stochastic vector processes: Seismic Ground Motion Applications." Probabilistic Engineering Mechanics, Vol. 11, No. 3, pp. 149-167.   DOI
8 Der Kiureghian, A. (1996). "A coherency model for spatially varying ground motions." Earthquake Engineering and Structural Dynamics, Vol. 25, No. 1, pp. 99-111.   DOI
9 Earthquake Engineering Society of Korea (1997). A study of seismic design criteria(II), Ministry of Construction and Transport (in Korean).
10 Gantmacher, F. R. (1977). The theory of matrices, Shelsea Publishing Company, New York, N.Y.
11 Hao, H. (1998). "A parametric study of the required seating length for bridge decks during earthquake." Earthquake Engineering and Structural Dynamics, Vol. 27, No. 1, pp. 91-103.   DOI
12 Hao, H., Oliveira, C. S. and Penzien, J. (1989). "Multiple-station ground motion processing and simulation based on SMART-1 array data." Nuclear Engineering and Design, Vol. 111, No. 3, pp. 293-310.   DOI
13 Jennings, P. C., Housner, G. W. and Tsai, N. C. (1968). "Simulated earthquake motions." Technical Report, Earthquake Engineering Research Laboratory, California of Technology, Pasadena, California.
14 Wolf, J. P. (1985). Dynamic soil-structure interaction, Prentice Hall, Englewood Cliffs, N.J.