Abstract It is well known that highway bridges are subjected to fatigue as they work under live loads with different frequencies and amplitude. The safety level for required by Brazilian codes still unknown, especially prestressed concrete girders. Also, current studies on reliability of only evaluate bending. This assesses the provided design standards a bridge, using weigh-in-motion (WIM) dat...

Title of Document: EFFECTS OF WINGWALL CONFIGURATIONS ON THE BEHAVIOR OF INTEGRAL ABUTMENT BRIDGES Andreas Paraschos, Doctor of Philosophy, 2016 Dissertation Directed By: Professor Amde M. Amde Department of Civil and Environmental Engineering This research includes parametric studies performed with the use of three-dimensional nonlinear finite element models in order to investigate the effects...

In current structural steel design specifications, the local buckling of cross-sections is typically treated on an element-by-element basis, with boundary conditions along adjoined longitudinal edges individual plates assumed to be simply-supported. reality, buckle locally as a whole and plate elements interact. As result, critical isolated (i.e. that lowest elastic stress) lie between lower up...

Formulae for calculating the elastic local buckling stresses of doubly-symmetric thin-walled I-section girders subjected to combined shear and direct stresses, accounting interaction between plate elements are presented. The (i.e. flanges web) is bounded by a theoretical lower-bound, where there no critical considered be simply-supported, upper-bound strongest have rotationally fixed edges. acc...

The wind flow around twin-box decks is particularly complex due to the very important role played by slot distance between girders and presence of downwind box that immersed in wake upwind box. Detailed experimental studies on three-dimensional features this deck typology are certainly challenging, CFD simulations have not tackled problem so far. goal 3D LES piece research shed some light decks...

the effect of a distributed patch mass on the natural frequency of vibration of a laminated rectangular plate with simply supported boundaries is investigated. the third order displacement field of a composite laminated rectangular plate is defined using the two variable refined plate theory. equations of motion of the plate are obtained with the help of calculus of variation. parametric study ...