{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/108706"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/108706","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Optimization of retrofit decisions as risk mitigation strategies for infrastructure","abstract":"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.","abstract_html":"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.","abstract_has_math":false,"creators":["Purba, Denissa Sari Darmawi"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":["Gardoni, Paolo"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2020,"date_issued":"2020-10-07T22:49:59Z","date_published":"2020-10-07T22:49:59Z","updated_at":"2026-07-22T22:24:48Z","subjects":["Retrofit Strategy","Infrastructure","Mitigation Planning","Matrix-based System Reliability","Two-stage Stochastic Optimization"],"languages":["en"],"rights":["Copyright 2020 Denissa Sari Darmawi Purba"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/108706","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Gardoni, Paolo"]},{"key":"dc:creator","label":"Author","values":["Purba, Denissa Sari Darmawi"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2020-10-07T22:49:59Z","2022-10-07T22:50:13Z","2020-07-23","2020-08"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Retrofit Strategy","Infrastructure","Mitigation Planning","Matrix-based System Reliability","Two-stage Stochastic Optimization"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2020 Denissa Sari Darmawi Purba"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/108706"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["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.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-08-01","The student, Denissa Purba, accepted the attached license on 2020-07-22 at 16:10.","The student, Denissa Purba, submitted this Thesis for approval on 2020-07-22 at 16:32.","This Thesis was approved for publication on 2020-07-23 at 10:33.","DSpace SAF Submission Ingestion Package generated from Vireo submission #15629 on 2020-10-02 at 15:50:51","Made available in DSpace on 2020-10-07T22:49:59Z (GMT). No. of bitstreams: 2 PURBA-THESIS-2020.pdf: 1049150 bytes, checksum: f94ff283b9b5826435160145a57e58c3 (MD5) LICENSE.txt: 4210 bytes, checksum: e4fb5234ef3e9b6d7335b6809addf8e1 (MD5) Previous issue date: 2020-07-23","Embargo set by: Seth Robbins for item 116335 Lift date: 2022-10-07T22:50:13Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Optimization of retrofit decisions as risk mitigation strategies for infrastructure"]}]}],"canonical_facts":{"dc:contributor":["Gardoni, Paolo"],"dc:creator":["Purba, Denissa Sari Darmawi"],"dc:date":["2020-10-07T22:49:59Z","2022-10-07T22:50:13Z","2020-07-23","2020-08"],"dc:description":["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.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-08-01","The student, Denissa Purba, accepted the attached license on 2020-07-22 at 16:10.","The student, Denissa Purba, submitted this Thesis for approval on 2020-07-22 at 16:32.","This Thesis was approved for publication on 2020-07-23 at 10:33.","DSpace SAF Submission Ingestion Package generated from Vireo submission #15629 on 2020-10-02 at 15:50:51","Made available in DSpace on 2020-10-07T22:49:59Z (GMT). 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