| Title |
Optimal Design for Seismically Isolated Bridges with Frictional Bearings |
| Keywords |
μ-GA;frictional bearing;seismically isolated bridge;optimal design;유전자알고리즘;마찰받침;지진격리교량;최적설계 |
| Abstract |
In this paper, the optimization of frictional bearings that applied to improve the seismic performance of conventional bridges were conducted. The nonlinear dynamic analysis of steel bridges and concrete bridges are carried out with the El Centro and artificial earthquake motions, and the reponses of the bridges were optimized by genetic algorithm. The object functions were considered with two parameters, such as shear forces and displacements at bearing, and the optimum object functions were searched by varying the weighting factors of the two parameters. As results, in case of the steel bridges, the optimum results were obtained when larger weight factor was imposed to the shear force. However, in case of concrete bridges, larger weight factor was need to the displacement for optimum results. |