Theory and experimental verification of a resultant response-based method for assessing the critical seismic excitation direction of curved bridges

摘要: Abstract Previous studies have shown that the seismic incidence angle imposes a non-negligible impact on performance of curved bridges. The computational efficiency some current methods for determining critical needs to be improved and their applicability in practical engineering projects remains examined. For this reason, resultant response-based (RRB) method is developed herein assessing excitation direction To validate feasibility an actual design context, 1/62.5-scale model three-span bridge designed multi-angle shaking table test implemented. Meanwhile, finite-element specimen set up, RRB as well linear response-history analysis (LRHA) are comparatively assessed. results indicate can capture bridges with sufficient precision (error does not exceed 10% compared LRHA). associated effort also substantially reduced given requires solely along two orthogonal directions angles, standard response history analyses where ground motion applied at multiple orientations. above observation further verified by well-designed experimental campaign, which demonstrates accuracy practicability case realistic configurations.