Dynamic Characteristics of Chilean Bridges with Seismic Protection
Publication: Journal of Bridge Engineering
Volume 10, Issue 2
Abstract
A new highway system is being constructed in Chile including many bridges. Due to the high seismic risk in the country, high damping rubber bearings, friction bearings, and passive energy dissipation devices have been considered in the design of the majority of the new moderate and large span bridges. Their design follows American Association of State Highway guidelines and technical specifications from the Chilean Ministry of Public Works. Experimental and analytical studies have been performed in three of these structures: (1) a 383 m long continuous beam bridge supported on high damping rubber bearings; (2) a 268 m long continuous beam bridge supported on friction bearing with additional viscous dampers; and (3) a five-span simply supported beam bridge resting on neoprene bearings. Predominant periods and damping characteristics for small amplitude vibrations have been determined from output-only nonparametric analyses. Comparison with standard analytical structural models indicates that the models normally used for analysis yield comparable predominant periods and mode shapes but the damping values typically recommended are larger than the ones observed from ambient vibrations, even when additional energy dissipation elements are present.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgment
The support of University of Chile, Fondecyt No. 1940466 and No. 1011025, MOP Proyecto Innovaciones Tecnológicas, SACYR and ALCHISA, is greatly acknowledged. We also thank the collaboration of Pedro Soto for his work during the development of this research.
References
Berrios, R. (2003). “Prospección geofisica del suclo bajo puente Marga-Marga: aplicación a un modelo de amplificación sísmica.” Civil Engineer thesis, Universidad de Chile, Santiago, Chile (in Spanish).
Boroschek, R., Moroni, M., and Sarrazin, M. (2003). “Dynamic properties of a long span seismic isolated bridge.” Eng. Struct., 25, 1479-1490.
Boroschek, R., and Yañez, F. (2000). “Experimental verification of basic analytical assumptions used in the analysis of buildings structured with walls.” Eng. Struct., 22, 657-669.
Castillo, C. (2001). “Análisis de registros de microvibraciones del puente El Teniente.” Civil Engineer thesis, Universidad de Chile, Santiago, Chile (in Spanish).
Chang, K., and Yeh, M. (2001). “Design and application examples of buildings and highways using anti-seismic techniques in Taiwan.” Proc., 7th Int. Seminar on Seismic Isolation, Passive Energy Dissipation and Active Control of Vibrations of Structures, ENEA, Bologna, Italy, 623-638.
Chaudhary, M. T. A. , Abé, M., and Fujino, Y. (2001). “Performance evaluation of base-isolated Yama-Agé bridge with high damping rubber bearings using recorded seismic data.” Eng. Struct., 23, 902-910.
Chaudhary, M. T. A. , Abé, M., Fujino, Y., and Yoshida, J. (2000). “System identification of two base-isolated bridges using seismic records.” J. Struct. Eng., 126(10), 1187-1195.
Dusseau, R., and Dubaisi, H. (1993). “Natural frequencies of concrete bridges in the Pacific Nothwest.” Transp. Res. Rec., Transportation Research Board, Washington, D.C., 119-132.
Dusseau, R. (1998). “Profiles of design dimensions and fundamental natural frequencies for steel interstate highway bridges in Southeastern Missouri.” Transp. Res. Rec., Transportation Research Board, Washington, D.C., 82-92.
Gárate, D. (2001). “Análisis de registros de microvibraciones del puente Amolanas.” Civil Engineer thesis, Universidad de Chile, Santiago, Chile (in Spanish).
Leiva, S. (2002). “Instalación de una red de acelerógrafos en el puente Amolanas.” Civil Engineer thesis, Universidad de Chile, Santiago, Chile (in Spanish).
Mazurek, D. F. , and Dewolf, J. T. (1990). “Experimental study of bridge monitoring technique.” J. Struct. Eng., 116(9), 2532-2549.
Nuñez, R. (1999). Ensayos de placa de neopreno Puente Limarí, SACYR, Santiago, Chile (in Spanish).
Romo, D. (1999). “Análisis de registros sísmicos y microvibraciones en el puente Marga-Marga.” Civil Engineer thesis, Universidad de Chile, Santiago, Chile (in Spanish).
Salawu, O. S. , and Williams, C. (1995). “Review of full-scale dynamic testing of bridge structure.” Eng. Struct., 17(2), 113-121.
Segovia, E. (1997). “Instrumentación del puente Marga-Marga.” Civil Engineer thesis, Universidad de Chile, Santiago, Chile (in Spanish).
Tanaka, T., Yoshizawa, S., Osawa, Y., and Morishita, T. (1969). “Period and damping vibration in actual building modes.” Bull. Earthquake Res. Inst., Univ. Tokyo Univ. Tokyo, 47, 1073-1092.
Ward, H. (1984). “Traffic generated vibrations and bridge integrity.” J. Struct. Eng., 110(10), 2487-2498.
Information & Authors
Information
Published In
Copyright
© 2005 ASCE.
History
Received: Jan 27, 2003
Accepted: Apr 7, 2004
Published online: Mar 1, 2005
Published in print: Mar 2005
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.