Investigating the Use of Natural and Artificial Records for Prediction of Seismic Response of Regular and Irregular RC Bridges Considering Displacement Directions

The seismic responses of continuous multi-span reinforced concrete (RC) bridges were predicted using inelastic time history analyses (ITHA) and incremental dynamic analysis (IDA). Some important issues in ITHA studied this research, including: the effects artificial natural records on predictions mean demands, displacement directions response, use 2D with combination rules for prediction response obtained 3D analysis, maximum radial demands compared to displacements along principal axes bridges. In addition, IDA was conducted at different damage states. These investigated case regular irregular three sets records. results indicated that typically resulted similar cases studied. effect direction predicting response. It shown good from analyses. median collapse capacity.