Optimization of retrofit decisions as risk mitigation strategies for infrastructure

Retrofit actions have become one of the prominent strategies for infrastructure mitigation planning in reducing vulnerability to hazards. A retrofit action is the application of advanced devices or materials to enhance structural performance. There are three common considerations in the decision-making process of implementing retrofit actions, i.e., limited budgets and resources, the complexity and the size of infrastructure systems, and the uncertainties of the hazards. Considering these three aspects, this study formulates a general stochastic optimization problem to find the optimal retrofit for infrastructure. The optimization problem is formulated to examine two objectives, i.e., to minimize the total retrofit cost and the performance losses of the infrastructure. The proposed formulation uses the Matrix-based System Reliability method to estimate the uncertainty parameters and the Decomposition method to find the optimum solution. Then, the general formulation is used specifically for transportation systems to find the optimal retrofit decisions for bridges.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Civil Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2020

Author dc:creator

• Purba, Denissa Sari Darmawi

Contributors dc:contributor

• Gardoni, Paolo

• Retrofit Strategy
• Infrastructure
• Mitigation Planning
• Matrix-based System Reliability
• Two-stage Stochastic Optimization

Statement dc:rights

• Copyright 2020 Denissa Sari Darmawi Purba

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/108706

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/108706