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A. Ebrahimpour, A.L. Miller, "Seismic Analysis of US-89 Overpass in Montpelier, Idaho, using OpenSees Finite Element Software", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 133, 2013. doi:10.4203/ccp.102.133

Keywords: seismic, analysis, bridge, nonlinear, finite element analysis.

Summary

Following major earthquakes in the 1970s, 80s, and 90s, changes were made to the U.S. structural seismic design codes. The steel and concrete Washington Street (US-89) overpass in Montpelier, Idaho, built in 1971, was selected for this study. The bridge is an appropriate structure for a detailed seismic analysis for several reasons: (1) Idaho is a top-ranked seismically active state with Southeast Idaho being more susceptible to earthquakes; (2) the bridge location is bounded by active faults; (3) the overpass is one of two routes that connect Montpelier to the rest of the state; and (4) the overpass crosses a busy railroad. A three-dimensional finite element model of the bridge was developed in OpenSees. Using information obtained from a geological study of the area, the database from the Pacific Earthquake Engineering Research Center at the UC, Berkeley, and input from geologists in Southeast Idaho, the displacement-time histories for four earthquakes were selected. The preliminary results of the basic computer model of the bridge show the reinforced concrete piers begin to behave nonlinearly, but will continue to carry load. Failure was, however, observed in the elements that restrain the lateral movement of the bridge deck.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 102 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: Paper 133 Seismic Analysis of US-89 Overpass in Montpelier, Idaho, using OpenSees Finite Element Software A. Ebrahimpour¹ and A.L. Miller² ¹Department of Civil and Environmental Engineering Idaho State University, United States of America ²Idaho Transportation Department, Pocatello, Idaho, United States of America doi:10.4203/ccp.102.133 purchase the full-text of this paper Full Bibliographic Reference for this paper A. Ebrahimpour, A.L. Miller, "Seismic Analysis of US-89 Overpass in Montpelier, Idaho, using OpenSees Finite Element Software", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 133, 2013. doi:10.4203/ccp.102.133 Keywords: seismic, analysis, bridge, nonlinear, finite element analysis. Summary Following major earthquakes in the 1970s, 80s, and 90s, changes were made to the U.S. structural seismic design codes. The steel and concrete Washington Street (US-89) overpass in Montpelier, Idaho, built in 1971, was selected for this study. The bridge is an appropriate structure for a detailed seismic analysis for several reasons: (1) Idaho is a top-ranked seismically active state with Southeast Idaho being more susceptible to earthquakes; (2) the bridge location is bounded by active faults; (3) the overpass is one of two routes that connect Montpelier to the rest of the state; and (4) the overpass crosses a busy railroad. A three-dimensional finite element model of the bridge was developed in OpenSees. Using information obtained from a geological study of the area, the database from the Pacific Earthquake Engineering Research Center at the UC, Berkeley, and input from geologists in Southeast Idaho, the displacement-time histories for four earthquakes were selected. The preliminary results of the basic computer model of the bridge show the reinforced concrete piers begin to behave nonlinearly, but will continue to carry load. Failure was, however, observed in the elements that restrain the lateral movement of the bridge deck. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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