PSI - Issue 18

ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDire t

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 18 (2019) 189–197

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Abstract In service structures, especially the bridges are always prone to damages; as a result, they exhibit insufficient performance, both in terms of structural safety and functionality. Reliable techniques are always needed for assessment and strengthening design of structures. This research involves the retrofitting of a damaged bridge structure. Assessment and observation of the existing situation of bridge lay a platform for selection of different strengthening techniques. A real life problem of an existing 50 years old continuous box-girder bridge (Hungary), having five spans of 138m length, is under consideration. Based on the existing health analysis of bridge, steel plate strengthening and FRP strip strengthening have been suggested. Application of steel plate strengthening shows that the cracked area reduces to one-half, where deflection value reduces around 3/4 th of total value. Crack width reduces significantly and comes within the allowable limit of 0.3mm. In case of FRP, strengthening work shows the remarkable results. The overall cracked area reduces to 1/5 th of total cracked area and crack width reduces to its minimum value (0.037mm). Overall deflection also reaches to the lowest possible value. Feasibility analysis of these strengthening methods shows that the FRP strengthening is more efficient and feasible solution than the steel plate strengthening. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Abstract In service structures, especially the bridges are always prone to damages; as a result, they exhibit insufficie t performance, both in terms of structural safety and functionality. Reliable techniques are always needed for assessment and strengthening design of structures. This research involves the retrofitting of a damaged bridge structure. Assessment and observation of the existing situation of bridge lay a platform for selection of different strengtheni g techniques. A real life problem of an existing 50 years old continuous box-girder bridge (Hungary), having five spans of 138m length, is under consideration. Base on the existing health analysis of bridge, steel plate strengthening and FRP strip strengthening have been suggested. Application of steel plate strengthening shows that the cracked area reduces to o e-half, where deflection value reduces around 3/4 th of total value. Crack idt reduces significantly and comes within the allowable limit of 0.3mm. In case of FRP, strengthening work shows the remarkable results. The overall cracked area reduces to 1/5 th of total cracked area and crack width reduces to its mi imum value (0.037mm). Overall deflectio also reaches to the lowest possible value. Feasibility analysis of these strengthening methods shows that the FRP strengthening is more efficient and feasible solution than the steel plate strengthening. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 25th International Conference on Fracture and Structural Integrity Retrofitting of damaged reinforced concrete bridge structure Muhammad Fawad a *, K. Kalman b , R.A. Khushnood a ,Muhammad Usman a a School of Civil and Environmental Engineering, National University of Sciences and Technology, Sector H-12, Islamabad Pakistan b Department of Structural Engineering,Budapest University of Technology and Economics, 1111 Budapest, M ű egyem rkp. 3. Hungary 25th International Conference on Fracture and Structural Integrity Retrofitting of damaged reinforced concrete bridge structure Muhammad Fawad a *, K. Kalman b , R.A. Khushnood a ,Muhammad Usman a a School of Civil and Environmental Engineering, N tional University of Sciences and Technology, Sector H-12, Islamabad Pakistan b Department of Structural Engineering,Budapest University of Technology and Economics, 1111 Budapest, M ű egyem rkp. 3. Hungary

Keywords: Damges, Retrofitting, Box-Girder Bridge, Cracks, Deflection, Steel Plates, FRP’s Keywords: Damges, Retrofitting, Box-Girder Bridge, Cracks, Deflection, Steel Plates, FRP’s

* Corresponding author. E-mail address: m.fawad2011@gmail.com * Correspon ing author. E-mail address: m.fawad2011@gmail.com

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 10.1016/j.prostr.2019.08.153