Title: Seismic Simulation of Bridges Considering Bending and Torsion Interaction
Author(s): Yang Yang and Ruili He
Publication: Symposium Paper
Appears on pages(s): 178-196
Keywords: reinforced concrete, bridge column, cyclic loading, failure analysis, torsion, truss modeling
Concrete columns in curved bridges have reportedly showed high interaction between bending and torsional
moments when subjected to design-level earthquake loading. In order to accurately evaluate the performance of curved
bridges under earthquake loadings, it is necessary to incorporate the interaction behavior into computational models.
However, very limited work has been reported in the literature, which includes finite element models involving threedimensional
solid elements and user-developed fiber elements in open-source computing tools; the former involves
significant computational effort when multiple levels of earthquake records need to be considered, while the latter is
not widely available in analysis tools like OpenSees. This study developed a modeling technique to simulate the
interaction between bending and torsional moments in bridge columns through the discretization of the column into
longitudinal, transverse, and diagonal elements. In this study, the developed modeling technique was validated against
experimental data from a previous study, and case studies on typical curved bridges were presented to show its
efficiency in seismic simulation.