Optimal Retrofit Design of Reinforced Concrete Frame with Infill Wall Using Fiber Reinforced Plastic Materials
Various retrofit techniques for reinforced concrete frame with infill wall have been steadily developed. Among those techniques, strengthening methodology based on diagonal FRP strips (FRP bracings) has numerous advantages such as feasibility of implementing without interrupting the building under operation, reduction of cost and time, and easy application. Considering the safety of structure and retrofit cost, the most appropriate retrofit solution is needed. Thus, the objective of this study is to suggest pareto-optimal solution for existing building using FRP bracings. To find pareto-optimal solution analysis, NSGA-II is applied. Moreover, the seismic performance of retrofit building is evaluated. The example building is 5-storey, 3-bay RC frames with infill wall. Nonlinear static pushover analyses are performed with FEMA 356. The criterion of performance evaluation is inter-story drift ratio at the performance level IO, LS, CP. Optimal retrofit solutions is obtained for 32 individuals and 200 generations. Through the proposed optimal solutions, we confirm the improvement of seismic performance of the example building.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1124045Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1567
 Hamoush, S.A.; McGinley, M.W.; Mlakar, P.; Scott, D.; Murray, K. Out-of-plane strengthening of masonry walls with reinforced composites. Journal of Composites for Construction 2001, 5, 139-145.
 Valluzzi, M.; Tinazzi, D.; Modena, C. Shear behavior of masonry panels strengthened by frp laminates. Construction and Building materials 2002, 16, 409-416.
 Erduran, E. Behaviour of brick infilled reinforced concrete frames strenghened cfrp reinforcement: Phase ii. 2002.
 Ozcebe, G. Strengthening of brick-infilled RC frames with CFRP. Department of Civil Engineering, Middle East Technical Univ.: 2003.
 El-Sokkary, H.; Galal, K. Analytical investigation of the seismic performance of rc frames rehabilitated using different rehabilitation techniques. Engineering structures 2009, 31, 1955-1966.
 Nehdi, M.; Nikopour, H. Genetic algorithm model for shear capacity of rc beams reinforced with externally bonded frp. Materials and structures 2011, 44, 1249-1258.
 BINICI, B.; OZCEBE, G. Analysis of infilled reinforced concrete frames strengthened with frps. In Advances in earthquake engineering for urban risk reduction, Springer: 2006; pp 455-470.
 Mazzoni, S.; McKenna, F.; Scott, M.; Fenves, G. Open system for earthquake engineering simulation (OpenSees) user command-language manual. Pacific earthquake engineering research center. University of California, Berkeley 2006.
 Akin, E. Effects of various parameters on CFRP strengthening of infilled Rc frames. Journal of Performance of Constructed Facilities 2014, 04014181.
 Roberts, J.; Brooker, O.; Alliance, M.M. How to design masonry structures using eurocode 6: Lateral resistance. Concrete Centre: 2007.
 El-Dakhakhni, W.W.; Elgaaly, M.; Hamid, A.A. Three-strut model for concrete masonry-infilled steel frames. Journal of Structural Engineering 2003.
 Choi, S.W.; Kim, Y.; Park, H.S. Multi-objective seismic retrofit method for using frp jackets in shear-critical reinforced concrete frames. Composites Part B: Engineering 2014, 56, 207-216.
 Council, B.S.S. Prestandard and commentary for the seismic rehabilitation of buildings, fema-356. Federal Emergency Management Agency, Washington, DC 2000.
 El-Sokkary, H. Analytical study on upgrading the seismic performance of nominally ductile rc frame structures using different rehabilitation techniques. Concordia University, 2007.
 Bsisu, K.A.-D.; Srgand, S.; Ball, R. The effect of width, multiple layers and strength of FRP sheets on strength and ductility of strengthened reinforced concrete beams in flexure.