The Padma Multipurpose Bridge (PMB) is one of the biggest megaprojects Bangladesh connecting third country with capital city, Dhaka. infrastructure expected to produce considerable uplift on nation’s transport system, national and regional economy, employment, household income, ultimately, poverty reduction. From construction river management points view, it most difficult engineering innovatio...

Abstract Bridge pier is a common feature in hydraulic structure. Its impact to the river usually occurs group form rather than single pier, so this challenging piers-group influence towards hydraulics and turbulence needs be explored. In paper, measurements were conducted using an Acoustic doppler velocimeter (ADV) study velocities three dimensions (longitudinal, transversal, vertical). Based o...

This research explores how a circular collar with tilt angle (counterclockwise around the direction of channel cross-section) could affect local scour depth single cylindrical pier in clear-water based on Large Eddy Simulation (LES) six cases. The results show that horizontal is best for reducing depth. With increases angle, effect decreases gradually and even counterproductive at equilibrium. ...

Precast post-tensioned segmental (PPS) bridge piers mitigate global and local damages of structures through natural hinges (joints between their segments) rocking motion segments. The application the PPS is currently growing in Accelerated Bridge Construction (ABC) where segments are manufactured offsite with higher quality, assembled onsite a short time. Structural vulnerability analysis very ...

This paper investigates the analytical results of seismic response multi-span prestressed concrete (PSC) I-girder bridges under loads. To perform numerical analyses, a three-span PSC bridge with width 12 m, total length 100 and maximum span 40 m was modeled, virtual location selected to consider soil properties area where constructed. The load acting on applied in consideration around pier wave...

Abstract Large debris transported by flood affects scour features at bridge piers and increases the risks of structural failure. Geometric characteristics relative position pier with respect to river bank are important parameters for process. The interaction between water flow accumulation shear stress, turbulence consequently enhances depth pier. This paper aims analyzing such effects on evolu...