Results 31 to 40 of about 507 (175)

Linear System Identification and Control of a Low‐Cost High‐Performance Omnidirectional Marine Surface Vehicle for Swarming Applications

open access: yesJournal of Field Robotics, EarlyView.
ABSTRACT Marine operations traditionally rely on human intervention, a costly and disruptive method. Autonomous surface vehicles (ASVs) offer a powerful alternative, capable of operating autonomously, for extended periods, and with various sensors for various missions.
Ayman El Qemmah   +4 more
wiley   +1 more source

Simple and detailed modeling of corrosion‐affected slender shear critical RC beams

open access: yesStructural Concrete, EarlyView.
Abstract The corrosion of steel bars compromises both the safety and the serviceability of reinforced concrete (RC) structures. Consequently, reliable tools are required to estimate the detrimental effects of corrosion on the structural response of RC members subjected to transverse loads.
Nino Spinella, Pier Paolo Rossi
wiley   +1 more source

Deflection‐based assessment of residual prestress in simply‐supported bridges accounting for creep variability

open access: yesStructural Concrete, EarlyView.
Abstract Several test methods have been proposed in the literature for measuring the level of residual prestress, most of them involving either semi‐ or fully destructive techniques for local measurements which could be highly sensitive to boundary conditions and execution details.
Giuseppe Zarrella   +2 more
wiley   +1 more source

An in-depth comparative analysis of data-driven and classic regression models for scour depth prediction around cylindrical bridge piers

open access: yesApplied Water Science, 2023
The study focuses on the critical concern of designing secure and resilient bridge piers, especially regarding scour phenomena. Traditional equations for estimating scour depth are limited, often leading to inaccuracies.
Mehdi Fuladipanah   +2 more
doaj   +1 more source

From shell to shelter: investigating small reef fish abundance on degraded seafloor restored with mussels and shell material

open access: yesRestoration Ecology, EarlyView.
Abstract Introduction Reef‐forming shellfish facilitate biodiversity through providing structural complexity in benthic habitats. Globally, reef‐forming shellfish have been overharvested to near extirpation, with a corresponding loss in biodiversity. Mussel shell material, an aquaculture by‐product, has the potential to rehabilitate ecosystem services ...
Altan Ní Mhurchú   +4 more
wiley   +1 more source

Hydrodynamic Modeling and Comprehensive Assessment of Pier Scour Depth and Rate Induced by Wood Debris Accumulation

open access: yesHydrology
This study mainly investigates the impact of debris accumulation on scour depth and scour hole characteristics around bridge piers. Through controlled experiments with uniform sand bed material, the influence of various debris shapes (high wedge, low ...
Muhanad Al-Jubouri, Richard P. Ray
doaj   +1 more source

Repeatability and Parasitic Out‐of‐Plane Motion in Controlled Rocking Structures With Cylindrical Columns: Results From Triaxial Shake Table Tests

open access: yesEarthquake Engineering &Structural Dynamics, Volume 55, Issue 11, Page 2930-2947, September 2026.
ABSTRACT Self‐centering rocking structures outperform conventional ones since they show zero post‐earthquake damage and excellent recentering; however, their applications remain limited due to concerns that rocking is extremely sensitive and nonrepeatable. This paper investigates the repeatability and parasitic out‐of‐plane motion of controlled rocking
Antonios A. Katsamakas
wiley   +1 more source

Characteristics of Flow Structure around Cylindrical Bridge Piers in Pressure-Flow Conditions [PDF]

open access: yesWater, 2019
The emerging shift of extreme events, combined with an aging infrastructure and bridges, highlights the potential increase in the risk of damage and catastrophic failure of bridges with climate change. This article analyzes the behavior of the flow and turbulence features in proximity to bridge piers, at two different moments of the scour temporal ...
Carnacina I., Leonardi N., Pagliara S.
openaire   +3 more sources

Effects of Roughness on Riprap Stability around Cylindrical Bridge Pier in 180 Degree River Bend [PDF]

open access: yesمهندسی منابع آب, 2017
Bridge is the most important structure in road building where the route crosses a river. Local scour around bridge piers built over a curve in a river is an important reason for its failure.
Alireza Masjedi, Amir Taeedi
doaj  

Assessment of the Geometric Shape of Bridge Pier on the Scour Depth Using the Support Vector Machine

open access: yesعلوم آب و خاک, 2021
The prediction of local scouring as a dynamic and nonlinear phenomenon using methods of acceptable predictive capability has always been of interest to researchers.
M. Fuladipanah, M. Majediasl
doaj  

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