Architecture -Demonstration Software for Seismic Risk Analysis of Highway Systems
REDARS 1: Demonstration Software for Seismic Risk Analysis of Highway Systems by Stuart D. Werner, Jean-Paul Lavoie, Chip Eitzel, Sungbin Cho, Charles Huyck, Shubharoop Ghosh, Ronald T. Eguchi, Craig E. Taylor and James E. Moore II
Research Objectives
The objective of this research is to further develop, apply, program, and disseminate the methodology for seismic risk analysis (SRA) of highwayroadway systems that was developed under FHWA-MCEER Project 106. The methodology’s risk-based framework uses models for seismology and geology, engineering (structural, geotechnical, and transportation), repair and reconstruction, system analysis, and economics to estimate systemwide direct losses and indirect losses due to reduced traffic flows and increased travel times caused by earthquake damage to the highway system. Results from this methodology also show how this damage can affect access to facilities critical to emergency response and recovery.
Federal Highway Administration
or the past several years, the Multidisciplinary Center for Earthquake Engineering Research has been carrying out highway research under the sponsorship of the Federal Highway Administration. One task from this research has developed a new methodology for deterministic and probabilistic seismic risk analysis (SRA) of highway systems nationwide, and has applied it to the Shelby County, Tennessee highway system (Werner et al., 2000). This methodology will enable users to evaluate and prioritize how various pre-earthquake seismic-risk-reduction strategies (e.g., strengthening of particular bridges, system enhancement) and post-earthquake emergency-response strategies (e.g., traffic management, emergency bypass road construction) will improve post-earthquake traffic flows and reduce associated losses. During the past year, this SRA methodology has been independently validated (Eguchi et al., 2003), and a plan for developing the methodology into a public-domain software package named REDARS (Risks
Research Objectives
The objective of this research is to further develop, apply, program, and disseminate the methodology for seismic risk analysis (SRA) of highwayroadway systems that was developed under FHWA-MCEER Project 106. The methodology’s risk-based framework uses models for seismology and geology, engineering (structural, geotechnical, and transportation), repair and reconstruction, system analysis, and economics to estimate systemwide direct losses and indirect losses due to reduced traffic flows and increased travel times caused by earthquake damage to the highway system. Results from this methodology also show how this damage can affect access to facilities critical to emergency response and recovery.
Federal Highway Administration
or the past several years, the Multidisciplinary Center for Earthquake Engineering Research has been carrying out highway research under the sponsorship of the Federal Highway Administration. One task from this research has developed a new methodology for deterministic and probabilistic seismic risk analysis (SRA) of highway systems nationwide, and has applied it to the Shelby County, Tennessee highway system (Werner et al., 2000). This methodology will enable users to evaluate and prioritize how various pre-earthquake seismic-risk-reduction strategies (e.g., strengthening of particular bridges, system enhancement) and post-earthquake emergency-response strategies (e.g., traffic management, emergency bypass road construction) will improve post-earthquake traffic flows and reduce associated losses. During the past year, this SRA methodology has been independently validated (Eguchi et al., 2003), and a plan for developing the methodology into a public-domain software package named REDARS (Risks
References: Dutta, A. and Mander, J.B., (1998), “Seismic Fragility Analysis of Highway Bridges,” Proceedings of the INCEDE-MCEER Center-to-Center Project Workshop on Earthquake Engineering Frontiers in Transportation Systems, Tokyo Japan, June 2223. Eguchi, R.T., Huyck, C.K., Cho, S., Ghosh, S. and Basoz, N., (2003), Review of REDARS 1.0 Seismic Risk Analysis Software (Task B1-4), ImageCat Inc., January. Federal Highway Administration (FHWA), (1995), Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation’s Bridges, Report FHWA-PD-96-001, Office of Engineering, Bridge Division, Bridge Management Branch, Washington DC, December. Mander, J.B. and Basoz, N., (1999), “Seismic Fragility Theory for Highway Bridges,” Optimizing Post-Earthquake Lifeline System Reliability, Proceedings of the Fifth U.S. Conference on Lifeline Earthquake Engineering, Seattle WA, Technical Council on Lifeline Earthquake Engineering Monograph No. 6 (Edited by W. M. Elliot and P. McDonough), American Society of Civil Engineers, Reston, VA, pp 31-40, August. Moore, J.E. II, Kim, G., Xu, R., Cho, S., Hu, H-H. and Xu, R., (1997), Evaluating System ATMIS Technologies via Rapid Estimation of Network Flows: Final Report, California PATH Report UCB-ITS-PRR-97-54, December. TriNet, (2002), Shakemap Web Site, http://www.trinet.org/shake, December. Werner, S.D., (1995), “Transportation Response,” Northridge Earthquake of January 17, 1994, Reconnaissance Report, Vol.1, Earthquake Spectra, Supplement C to Volume 11, Publication 95-03, April, pp. 356-366. Werner, S. D., Taylor, C. E., Moore, J. E. II, Walton, J. S. and Cho, S., (2000), A Risk-Based Methodology for Assessing the Seismic Performance of Highway Systems, Technical Report MCEER-00-0014., Multidisciplinary Center for Earthquake Engineering Research, University at Buffalo, Buffalo, December 31. Werner, S.D., (2001), “A Risk-Based Methodology for Assessing the Seismic Performance of Highway Systems”, Research Progress and Accomplishments: 2000-2001, Report number MCEER-01-SP01, Multidisciplinary Center for Earthquake Engineering Research, University at Buffalo, May. Werner, S.D., Taylor, C.E., Lavoie, J-P, Eitzel, C., Moore, J.E. II and Walton, J.S., (2003), Annual Report for Year 3 of Task B1-2, Enhancement and Programming of REDARS Software for Seismic Risk Analysis of Highway Systems, Seismic Systems & Engineering Consultants, Oakland CA, January. 34