One of the most common problems for river engineers is accumulation waterborne debris upstream bridge piers. In addition to reducing cross-sectional flow area, increases drag force exerted pier and contributes scour. Several studies have been carried out by previous researchers examine usefulness different types countermeasures. The effectiveness these countermeasures not well understood when o...

Soil scour near a bridge pier foundation is one of the leading causes failures. Traditional vibration-based monitoring methods are nearly incapable quantifying levels using single acceleration response without knowledge excitation information. In this paper, new output-only level prediction method introduced via integration an unscented Kalman filter (UKF), random decrement (RD), and newly deri...

Pier is the second generation of an industrial strength content management and application framework. Pier is written with objects from top to bottom and it is easily customized to accommodate new requirements. Pier is based on Magritte, a powerful meta-description framework. Pier has proven to be very powerful in the combination with Seaside, to enable easy composition and configuration of int...

Because of the problem local scour caused by change flow structure water-resistance column bridge pier, theoretical analysis, and indoor water tank test were used to study effect installing a new anti-scouring device in front pier on reduction effect; influence main design parameters such as height protective device, angle distance from was selected, optimal parameter combination selected. The ...

Debris-flow impact plays a significant role in the failure of bridges mountainous areas posing risk to human life and leading high reconstruction costs. The aim this study is measure quantify frontal forces debris flows on bridge superstructures based laboratory experiments with special regard comparison two different profiles presence / absence pier. To end, we conducted 20 experiments, measur...

Abstract The appearance of an ice jam in a river crucially distorts local hydrodynamic conditions including water level, flow velocity, riverbed form and scour processes. Laboratory experiments are used for the first time here to study ice-induced processes near bridge pier. Results show that with sheet cover hole depth around is increased by about 10% compared under equivalent open conditions....

The degradation of seismic performance for RC bridge piers induced by chloride corrosion has previously been studied treating the earthquake as a unilateral cyclic loading. Such studies do not consider true response pier under joint effect damage and real multi-dimensional action. Thus, in present study, behavior rectangular subjected to coupling effects bidirectional loading was numerically in...