and Assessment of Critical Spatial Deformations and Internal Force States of Continuous Monolithic Reinforced Concrete Bridges under Strong Seismic Actions Using MiDAS Civil

Abstract

The article presents the results of spatial seismic calculations for a continuous monolithic reinforced concrete bridge structure using the spectral method implemented in the MiDAS Civil software package. In the study, a spatial computational model of the structure was developed, taking into account the combined spatial behavior of the bridge span structure, intermediate and end supports, as well as the prestressed reinforcement system. The computational model is based on the finite element method, considering the stiffness properties of the structure and the interaction of bending, torsional, and transverse shear deformations. Through spectral analysis, the internal forces and displacements induced by standard seismic loads on the bridge's structural elements were evaluated. The obtained results allow for the determination of seismic stability in continuous monolithic bridges, refinement of calculation schemes, and optimization of design and technological solutions for seismically active regions.