Abstract
Focused upon the effect of the multi-direction ground motion and the dispersion of material strength, seismic performance evaluation of RC frames in railroad viaducts was conducted using the three-dimensional nonlinear dynamic analysis. Fiber model has applied to RC piers. As a result, it has been reconfirmed that three-dimensional analysis of directly taking in the effect of the multi-direction input is necessary to estimate seismic behaviors. It has been also reconfirmed that careful attention must be paid to material strength, especially yield strength of reinforcement. This analysis method has effectively put the newest technical knowledge to practical use and it is possible to carry out the seismic damage analysis appropriately by adding the engineering judgment.
