scour around bridge piers is one of the most important fields of hydraulic research. local scour around bridge piers and abutment is one of the main reasons of bridge failures. in the field of scour at the bridges, researches are more focus on scour of piers in compare with abutment. while the available information on the bridge failures required cost, the major problems are related to abutment...

The role of abutments on the seismic vulnerability bridges has been relatively little studied in geotechnical literature. To cover this gap, 3D numerical simulations were herein performed, by studying performance three single-span bridge configurations. models used OpenSees to account effects due soil structure interaction between deck and abutments. In particular, advanced materials implemente...

A two-dimensional finite element model of a mandibular quadrant was used to examine differences in magnitude of the principal stresses from the placement of three- and four-unit bridges. The area of interest spanned the first premolar to the second molar. Loading conditions were (i) vertical and distributed and (ii) 30 degrees to the vertical and concentrated. The principal stresses were calcul...

This paper investigates the effect of different geometries approach embankments and guides banks on flow pattern bed shear stress values in skewed bridges compound channel using three-dimensional numerical modelling. First, model was evaluated based results existing laboratory studies. After ensuring its proper performance, elliptical guide bank three types abutments: vertical-wall, spill-throu...

Abstract Bridges are among the most important transportation elements that may be damaged by earthquakes. An integral abutment bridge (IAB) is a linking superstructure directly to substructure. As soil piles, abutments, and superstructures act as combined system resist lateral loading on bridge, stiffness has major impact load distribution. This research attempts determine how structure paramet...

Recently, a benchmark problem has been developed to study seismically excited highway bridges. In the second phase of the aforementioned study, the bridge is isolated both at the abutments and at the central pier location. The isolation, though effective in reducing the superstructure responses such as mid-span accelerations, results in increased mid-span and isolator displacements. The perform...

Research evolution regarding dental research determines the increase of patient's desire to preserve their dentition for a long time. The loss of a molar tooth as the last teeth present on the dental arch, raises issues regarding how the prosthesis should be placed, still patients are usually reluctant to use as last resort the prosthetic solution. This article describes the technique of root a...