Free Vibration Analysis of RC Box-Girder Bridges Using FEM

The free vibration analysis of simply supported box-girder bridges is carried out using the finite element method. fundamental frequency determined in straight, skew, curved and skew-curved bridges. It important to analyse combined effect skewness curvature because bridge behaviour cannot be predicted by adding individual effects curvature. At first, an existing model considered validate present approach. A convergence study decide mesh size An exhaustive parametric conducted determine with varying skew angle, curve span, span-depth ratio cell number. angle varied from 0° 60°, span changed 25 50 m, 10 16, single & double are used study. total 420 models for investigation. Mode shapes also presented. found more than straight bridge, so, preferable. may useful design