Abstract
Bridge deck splashing causes deterioration to a bridge’s structure and renders the bridge unsafe for motorists and pedestrians. The traditional countermeasure for bridge deck splashing has been pier extension. Pier extensions move the pier wave and the associated splash away from the bridge deck, but retrofitting existing bridges with pier extensions is costly. This research evaluates the use of a bulbous added to the pier as an alternative to pier extension. A bulb placed on the upstream side of a bridge pier affects the splashing. The energy in the passing water is redirected from the impact by streamlining the flow. This study proposes a mathematical model for bulbous pier design, based on a model used for a mono-hull ship. Under the mono-hull model, the bulb length extends, reaching the region where viscous resistance is dominant. Unlike wave-making resistance, which is achieved through modeling, the proposed model does not require modeling to calculate pier wave reduction.
Highlights
The interaction of supercritical water flow with a pier nose creates a pier wave, which might cause the flowing water to be projected onto the bridge deck
The bulb diameter shall be equal to the pier width; Using Figure 28 or Figure 29, determine the Lbb /Ys for the Froude number calculated in the previous step; V
Experimental values show that a bulbous pier reduces the pier wave height by subtracting energy from the water flow
Summary
The interaction of supercritical water flow with a pier nose creates a pier wave, which might cause the flowing water to be projected onto the bridge deck. This phenomenon is called bridge deck splashing, and can endanger motorists and pedestrians on the bridge. Stonestreet et al (1994) provided an overview of the extensive physical model studies of the Los Angeles and Rio Hondo rivers [1]. The pier extensions eliminated the runup and splash on the bridge deck
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
