Nonlinear Seismic Response of Skewed Highway Bridges Subjected to Bidirectional Near-Fault Ground Motions
Publication: Journal of Bridge Engineering
Volume 22, Issue 7
Abstract
Past earthquakes have repeatedly demonstrated that skewed bridges are more vulnerable to earthquake-induced failure than straight bridges because of their complex, irregular geometries and unique load-transfer mechanisms. This study focused on analyzing the seismic performances of prestressed concrete box-girder highway bridges with seat-type abutments under bidirectional near-fault ground motions, especially with respect to abutment skew angle, gap size at the expansion joint between the superstructure and the abutment in the longitudinal direction, and initial gap size between the the superstructure and abutment shear keys in the transverse direction. Three dimensional models of single- and two-span bridges with seat-type abutments were developed considering nonlinear characteristics of skew-angled abutments, bridge key components, abutment-soil interaction, soil-pile interaction, and the pounding effect between the superstructure and the abutments. Nonlinear time-history analyses were performed for various skewed highway bridge models using seven sets of near-fault ground motions with two horizontal components. Results showed that the skew angle and gap size in longitudinal and transversal directions have significant impact on the seismic behavior of skewed highway bridges. The deck displacement in the longitudinal direction and rotation response will increase with the increase of the skew angle, but the transverse displacement response exhibits a more severe response after the skew angle reaches 30°. The longitudinal deck displacement and rotation of skewed bridges increase with decreasing gap size at the expansion joint in a longitudinal direction. Furthermore, the behavior of shear keys may have an important effect on the overall seismic response of skewed highway bridges, especially the probability of collapse due to excessive deck rotation.
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Acknowledgments
This research was funded by the National Natural Science Fund of China (Grants 51578022 and 51421005). The financial support is gratefully acknowledged. The results and conclusions presented in this paper are those of the authors and do not necessarily reflect the views of the sponsors.
References
API (American Petroleum Institute). (1993). Recommended practice for planning, design and constructing fixed offshore platforms, 20th Ed., Washington, DC.
Apirakvorapinit, P., Mohammadi, J., and Shen, J. (2012). “Analytical investigation of potential seismic damage to a skewed bridge.” Pract. Period. Struct. Des. Constr., 5–12.
Caltrans. (2013). Bridge design specifications, Sacramento, CA.
Deepu, S. P., Prajapat, K., and Ray-Chaudhuri, S. (2014). “Seismic vulnerability of skew bridges under bi-directional ground motions.” Eng. Struct., 71 150–160.
Dimitrakopoulos, E. G. (2011). “Seismic response analysis of skew bridges with pounding deck–abutment joints.” Eng. Struct., 33(3), 813–826.
Ghobarah, A. A., and Tso, W. K. (1973). “Seismic analysis of skewed highway bridges with intermediate supports.” Earthquake Eng. Struct. Dyn., 2(3), 235–248.
Ghotbi, A. R. (2014). “Performance-based seismic assessment of skewed bridges with and without considering soil-foundation interaction effects for various site classes.” Earthquake Eng. Eng. Vib., 13(3), 357–373.
Han, Q., and Ding, Z. W. (2014). “Experimental study on seismic performance of shear keys of highway bridges.” KLSE Rep. 2014/08, Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing.
Han, Q., Du, X. L., Liu, J. B., Li, Z. X., Li, L. Y., and Zhao, J. F. (2009). “Seismic damage of highway bridges during the 2008 Wenchuan Earthquake.” Earthquake Eng. Eng. Vib., 8(2), 263–273.
Huo, Y., and Zhang, J. (2013). “Effects of pounding and skewness on seismic responses of typical multispan highway bridges using the fragility function method.” J. Bridge Eng., 499–515.
Jankowski, R., Wilde, K., and Fujino, Y. (2000). “Reduction of pounding effects in elevated bridges during earthquakes.” Earthquake Eng. Struct. Dyn., 29(2), 195–212.
Kalantari, A., and Amjadian, M. (2010). “An approximate method for dynamic analysis of skewed highway bridges with continuous rigid deck.” Eng. Struct., 32(9), 2850–2860.
Kaviani, P., Zareian, F., and Taciroglu, E. (2014). “Performance-based seismic assessment of skewed bridges.” PEER Rep. 2014/01, Pacific Earthquake Engineering Research Center, Univ. of California, Berkeley, CA.
Kwon, O. S., and Jeong, S. H. (2013). “Seismic displacement demands on skewed bridge decks supported on elastomeric bearings.” J. Earthquake Eng., 17(7), 998–1022.
Li, Z. X., Yue, F. Q., and Zhou, L. (2008). “Equivalent Kelvin impact model for pounding analysis of bridges during earthquake.” J. Eng. Mech., 25(4), 128–133.
Maleki, S. (2004). “Effect of side retainers on seismic response of bridges with elastomeric bearings.” J. Bridge Eng., 95–100.
Malhotra, P. K. (1999). “Response of buildings to near-field pulse-like ground motions.” Earthquake Eng. Struct. Dyn., 28(11), 1309–1326.
Mallick, M., and Raychowdhury, P. (2015). “Seismic analysis of highway skew bridges with nonlinear soil–pile interaction.” Trans. Geotech., 2015, 3 36–47.
Mander, J., Priestley, M., and Park, R. (1988a). Observed stress-strain behavior of confined concrete.” J. Struct. Eng., 1827–1849.
Mander, J., Priestley, M., and Park, R. (1988b). “Theoretical stress-strain model for confined concrete.” J. Struct. Eng., 1804–1826.
Maragakis, E. (1984). “A model for the rigid body motions of skew bridges.” California Institute of Technology. 〈http://authors.library.caltech.edu/26372/1/8502.pdf 〉 (Mar. 11, 2015).
Maragakis, E., and Jennings, P. C. (1987). “Analytical models for the rigid body motions of skew bridges.” Earthquake Eng. Struct. Dyn., 15(8), 923–944.
Matlock, H. (1970). “Correlations of design of laterally loaded piles in soft clay.” Proc., Offshore Technology Conf.,Vol. 1, Offshore Technology Conference, Houston, 577–594.
McClelland, B., and Focht, J. A. (1958). “Soil modulus for laterally loaded piles.” Trans. ASCE, 123(1), 1049–1063.
Megally, S. H., Silva, P. F., and Seible, F. (2001). “Seismic response of sacrificial shear keys in bridge abutments.” Structural Systems Research Rep. SSRP-2001/23, Dept. of Structural Engineering, Univ. of California San Diego, La Jolla, CA.
Menassa, C., Mabsout, M., Tarhini, K., and Frederick, G. (2007). “Influence of skew angle on reinforced concrete slab bridges.” J. Bridge Eng., 205–214.
Meng, J. Y., and Lui, E. M. (2000). “Seismic analysis and assessment of a skew highway bridge.” Eng. Struct., 22(11), 1433–1452.
Meng, J., and Lui, E. M. (2002). “Refined stick model for dynamic analysis of skew highway bridges.” J. Bridge Eng., 184–194.
Ministry of Transport of the People’s Republic of China. (2008). “Guideline for seismic design of highway bridges.” JTG/T 2008, Beijing.
PEER (Pacific Earthquake Engineering Research Center). (2011). PEER strong motion database. 〈http://peer.berkeley.edu/products/strong_ground_motion_db.html〉 (Dec. 27, 2014).
Priestley, M. N., Seible, F., and Calvi, G. M. (1996). Seismic design and retrofit of bridges, Wiley, New York.
SAP2000 14.0.0 Advanced [Computer software]. Computer and Structures, Inc., Berkeley, CA.
Silva, P. F., Megally, S., and Seible, F. (2002). “Performance of sacrificial exterior shear keys under simulated seismic loading.” ACI Mater. J., 209, 681–700.
Silva, P. F., Megally, S., and Seible, F. (2009). “Seismic performance of sacrificial exterior shear keys in bridge abutments.” Earthquake Spectra, 25(3), 643–664.
Shamsabadi, A., Yan, L., and Martin, G. (2004). “Three dimensional nonlinear seismic soil-foundation-structure interaction analysis of a skewed bridge considering near fault effects.” 〈http://gemsoft.us/Papers/Three%20Dimensional%20Nonlinear%20Seismic%20Soil-Foundation-Structure%20Interaction.pdf〉 (Aug. 25, 2014).
Wakefield, R. R., Nazmy, A. S., and Billington, D. P. (1991). “Analysis of seismic failure in skew RC bridge.” J. Struct. Eng., 972–986.
Wang, Z., and Lee, G. C. (2009). “A comparative study of bridge damage due to the Wenchuan, Northridge, Loma Prieta and San Fernando earthquakes.” Earthquake Eng. Eng. Vib., 8(2), 251–261.
Zakeri, B., Padgett, J., and Amiri, G. (2014). “Fragility analysis of skewed single-frame concrete box-girder bridges.” J. Perform. Constr. Facil., 571–582.
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Published In
Journal of Bridge Engineering
Volume 22 • Issue 7 • July 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Mar 21, 2016
Accepted: Jan 24, 2017
Published online: May 8, 2017
Published in print: Jul 1, 2017
Discussion open until: Oct 8, 2017
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