Abstract
Old bridges present several seismic vulnerabilities and were designed before the emergence of seismic codes. In this context, partial seismic isolation has given a special attention to improve their seismic performance. In particular, elastomeric bearings are the simplest and least expensive mean for this, enabling to resist both non-seismic actions and earthquake loads. In order to assess the initial structural performance and the improvement done by the isolation, this paper attempts to combine multi objective optimization using genetic algorithms with linear and non-linear analysis using FE program OpenSees. A prior screening of the columns states is settled and then a multi objective optimization of a population of standard sized bearings meeting non-seismic and stability requirements is established to optimize the linear and non-linear behavior of the structure, finding the best compromise between displacements and forces at the columns
Publisher
Warsaw University of Life Sciences – SGGW Press
Subject
Earth-Surface Processes,General Environmental Science,Geotechnical Engineering and Engineering Geology,Building and Construction,Civil and Structural Engineering
Reference19 articles.
1. Abbadi, M.S. and Lamdouar, N. (2018). Structural evaluation updating based on quality control and proof loads. MATEC Web of Conferences, 149, 02014. https://doi.org/10.1051/matecconf/201814902014
2. Abbadi, M.S. and Lamdouar, N. (2019). Pushover analysis of RC columns subjected to multiple degrees of transverse reinforcement corrosion. International Journal of Civil Engineering and Technology, 10(11), 313-322.
3. Alhan, C. and Gavin, H.P. (2005). Reliability of base isolation for the protection of critical equipment from earthquake hazards. Engineering Structures, 27(9), 1435-1449.
4. Alkhamis, M., Ghasemi, M.R., Gholinezhad, A., Shabakhty, N. and Abdullah, W. (2018). Performance-based Optimum Retrofitting Design of Concrete Bridge Piers. Jordan Journal of Civil Engineering, 12(4), 637-653.
5. Dezfuli, F.H. and Alam, M.S. (2013). Multi-criteria optimization and seismic performance assessment of carbon FRP-based elastomeric isolator. Engineering Structures, 49, 525- -540.