In this research a physical model is presented. A trapezoidal shape of channel with 1.45 m width, 1 meter depth and banks slope of 1H: 1.5V was used. Circular piers (6, 8 and 10cm diameter) were tested under three different flow discharges of 50, 65 and 80 lit/s and three different median bed material sizes equal to 0.94, 1.31 and 2.12 mm. Seven different longitude distance to pier diameter rat...

Abstract To meet the high durable requirements of assembled bridge piers in marine environment, a new grout is used sleeve to improve corrosion resistance pier bottom. The seismic performance adopting this studied. Firstly, dynamic analysis model reinforced concrete with established using finite element software ABAQUS. Moreover, damage modes, hysteresis curves, and energy consumption for low r...

the effect of a combined system of the bed suction and jet injection as a pier-scour countermeasure on the turbulent flow field is studied in a laboratory flume using an acoustic doppler velocimeter (adv). the three components of the velocities in the vertical symmetry plane in the equilibrium scour hole in front and rear of the pier under 3-jet injections and bed suction rate qs/q0 = 2%located...

For the lifetime assessment of running safety a train in aggressive environments and earthquake-prone areas, effects corrosion on seismic performance must be considered. Research trains, including damage, is limited, despite fact that trains high-speed railway bridges has been extensively examined. In this work, was evaluated using time-varying corroded bridge finite-element model established O...

The aim of this work is to estimate the seismic reliability a simple typical two-span lifeline base-isolated bridge designed behave essentially elastic or as per Canadian Highway Bridge Design Code, for seven localities in Quebec. Two limit states are considered possible failure due unacceptable damage: flexure at pier-base and displacement within isolation systems (SIS). main problem random va...

The study aims to further standardize the construction process, improve quality, and ensure stability of infrastructure construction. continuous rigid-frame bridge is taken as research object, finite element model body established by using beam element, overall analyzed in completion stages. Moreover, coefficient buckling mode are under different working conditions each stage, linear variation ...

side weir is a flow control structure that used extensively in irrigation and drainage as well as sewer networks. throughout the present research, a study comprised of 162 experiments was done on sharp-crested semi-circular side weir. since the height in this side weir varies along its length, this feature enables it to more properly control flood than rectangular side weirs in various flood co...

piezoelectric nanobeams having circular, rectangular and hexagonal cross-sections are synthesized and used in various nano structures; however, piezoelectric nanobeams with hexagonal cross-sections have not been studied in detail. in particular, the physical mechanisms of the surface effect and the role of surface stress, surface elasticity and surface piezoelectricity have not been discussed t...