Retrofitting Resources Allocation Model for Bridges in the Emergency Roads Network of Tehran after an Earthquake: Optimization Model Using GIS

Document Type : علمی - پژوهشی


1 Ph.D. Student of Civil Engineering, Department of Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

2 Associate Prof. of Civil Engineering, Department of Engineering, karaj Branch, Islamic Azad University, karaj, Iran


Among the network of urban roads, the network of emergency roads plays an important role in providing relief during an earthquake, especially in the crisis response phase. It is very important to maintain the function of the urban roads network in the first few hours after earthquake. Protecting and strengthening vulnerable parts of the network before the crisis (especially bridges) plays a significant effect in reducing damages and injuries. However, retrofitting all vulnerable components is practically impossible due to budget constraints. The existence of this limitation requires identifying the vulnerable components accurately. Therefore, retrofitting options are prioritized first, and the most suitable ones are finally selected. In this research, after identifying the bridges that need to be retrofitted on the emergency roads network through a five-step methodology, we also considered the financial limitations and budget allocation options, and prioritized retrofitting options based on the network of layers created in the Geographic Information systems environment (GIS) under the title of input. Examining all possible situations for the stability of bridges after a specific earthquake, designing the emergency road network for all these situations, examining different options for retrofitting bridges, evaluating the effect of this retrofitting on the length of the emergency network, and finally, the prioritization of retrofitting options according to their impact during the emergency network, are the main steps of the proposed method in this study. The efficiency of the above method was evaluated after applying it on a part of the emergency roads network of Tehran as a real network with large scale.



Babaei, M., Shariat-Mohaymany, A., Nikoo, N. & Ghaffari, A.R., 2019, A Multi-Objective Emergency Network Design Problem to Carry Out Disaster Relief Operations in Developing Countries: A Case Study of Tehran, Iran, Journal of Humanitarian Logistics and Supply Chain Management, 9(2), PP. 250-269.
Chandrashekaran, S. & Banerjee, S., 2014, Optimal Retrofit Strategy for Disaster Resilience of Highway Bridges, In 10th US National Conference on Earthquake Engineering (PP. 21-25).
Choi, S., Chae, J. & Do, M., 2022, Emergency Road Network Determination for Seoul Metropolitan Area, Sustainability, 14(9), P. 5422.
Du, L. & Peeta, S., 2014, A Stochastic Optimization Model to Reduce Expected Post-Disaster Response Time through Pre-Disaster Investment Decisions, Networks and Spatial Economics, 14, PP. 271-295.
Edrissi, A., Poorzahedy, H., Nassiri, H. & Nourinejad, M., 2013, A Multi-Agent Optimization Formulation of Earthquake Disaster Prevention and Management, European Journal of Operational Research, 229(1), PP. 261-275.
Edrissi, A., Nourinejad, M. & Roorda, M.J., 2015, Transportation Network Reliability in Emergency Response, Transportation Research Part E: Logistics and Transportation Review, 80, PP. 56-73.
Golroo, A. & Mohaymany, A.S., 2008, Upgrading of Degradable Transportation Network by Investment, Journal of Applied Sciences, 8(13), PP. 2404-2411.
Golroo, A., Mohaymany, A.S. & Mesbah, M., 2009, Developing an Optimised Resource Allocation Framework in a Transport Network Based on Reliability, Road & Transport Research: A Journal of Australian and New Zealand Research and Practice, 18(3), PP. 26-35.
Iran University of Science and Technology, 2016, Design Project of the Emergency Road Network of Tehran City, Tehran Municipality Transport and Traffic Deputy.
Nikoo, N., Babaei, M. & Mohaymany, A.S., 2018, Emergency Transportation Network Design Problem: Identification and Evaluation of Disaster Response Routes, International Journal of Disaster Risk Reduction, 27, PP. 7-20.
Shakiba, A., Mirjafari, S.B. & Alavi Betul Kamel, S.A., 2013, Evaluation of Human Casualties and Building Damages in different Earthquake Scenarios under Conditions of Uncertainty (Case Study: District 8 of Tabriz City), Remote Sensing and GIS of Iran, 5(3), PP. 49-63.
Shariat-Mohaymany, A. & Babaei, M., 2010, An Approximate Reliability Evaluation Method for Improving Transportation Network Performance, Transport, 25(2), PP. 193-202.
Shariat Mohaymany, A. & Babaei, M., 2013, Optimal Resource Allocation in Urban Transportation Networks Considering Capacity Reliability and Connectivity Reliability: A Multi-Objective Approach, International Journal of Civil Engineering, 11(1), PP. 33-42.
Shariat Mohaymany, A. & Nikoo, N., 2020, Designing Large-Scale Disaster Response Routes Network in Mitigating Earthquake Risk Using a Multi-Objective Stochastic Approach, KSCE Journal of Civil Engineering, 24(10), PP. 3050-3063.
Shariat-Mohaymany, A., Hosseini, M. & Habibi, H.M., 2003, Obtaining the Emergency Transportation Network for Rescue and Relief Activities in Large Cities Based on the Life Loss Mitigation Criteria, In Advancing Mitigation Technologies and Disaster Response for Lifeline Systems (PP. 231-240).
Shariat-Mohaymany, A., Ehteshamrad, S. & Babaei, M., 2012, A Reliability-Based Resource Allocation Model for Transportation Networks Affected by Natural Disasters, Promet-Traffic& Transportation, 24(6), PP. 505-513.
Shariat-Mohaymany, A., Ehteshamrad, S. & Babaei, M., 2014, Allocation of Investment in Transportation Network Based on Reliability, Journal of Civil and Environmental Engineering of Tabriz University, 44(76), PP. 89-97.