Results 61 to 70 of about 591 (207)

Mechanics‐based model for cold joints in reinforced concrete members

Structural Concrete, EarlyView.
Abstract This study introduces a mechanics‐based numerical model to characterize the behavior of cold joints in reinforced concrete members subjected to monotonic loading. The model incorporates mechanisms such as interface slip and opening, aggregate interlock, clamping force, and dowel action of the reinforcing bars crossing the interface.
Brandon Li, Hwa‐Ching Wang, Oguzhan Bayrak, Anca C. Ferche   +3 more
wiley   +1 more source

Geometry of developing and equilibrium scour holes at bridge piers in gravel

Canadian Journal of Civil Engineering, 2010
Experimental results on scour at circular and square cylinders in uniform gravel under the clear-water scour condition are presented. Nonintrusive, high-resolution topographic measurements of developing and equilibrium scour holes were performed during running experiments with an experimental installation using a laser distance sensor (LDS) and ...
Diab, Reda, Link, Oscar, Zanke, Ulrich
openaire   +3 more sources

Urban oases relax desiccation risk for an arid‐adapted lizard

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Urbanization from expanding human development has radically altered the structure, ecology and microclimate of landscapes worldwide. These dramatic environmental alterations subject organisms to novel ecological conditions and may select for distinct ecophysiological ...
Tucker C. Heptinstall, Savannah J. Weaver, Rory Mendelow, David J. Stroud, Sara Ahlich, Tanmayi Patharkar, Annika Pohlo, Emily N. Taylor, Kinsey M. Brock   +8 more
wiley   +1 more source

Prediction of scour profiles downstream of grade control structures via the shear stress and sediment bed curvature model

International Journal of Sediment Research
A new semianalytical model for the prediction of local scour profiles downstream from typical grade-control structures is proposed on the basis of the variation in bed shear stress and the sediment bed curvature concept.
Amir H. Azimi
doaj   +1 more source

Viscosity effects on local scour around vertical structures in clear-water conditions

E3S Web of Conferences, 2018
Local scour represents the erosion process that occurs at the base of hydraulic structures overlying sediment beds. Horseshoe vortices forming at the bed-structure junction are the main responsible for sediment removal and dictate erosion rates as well ...
Manes Costantino, Coscarella Francesco, Rogers Ashley, Gaudio Roberto   +3 more
doaj   +1 more source

Effect of Transversal Bed Slope on the Equilibrium Scour Depth at Bridge Piers

Journal of Hydraulic Engineering
This study focused on the effect of the transversal bed slope on scouring at bridge piers. Twenty-four experiments were conducted, half of them being on a horizontal bed and the other half on inclined beds. Three inclination angles, three flow intensities, and three pier diameters were combined within the degrees of freedom of the available ...
Bombar, Gokcen, Cardoso, Antonio Heleno
openaire   +2 more sources

Resilience in the heights: Elevational filtering preserves taxonomic and functional beta diversity over time against biotic homogenization

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Environmental heterogeneity generates taxonomic and functional beta diversity, but a key question regards whether heterogeneity can maintain functional diversity when global change causes range shifts, potentially causing biotic homogenization by favouring species ...
Hugo Alejandro Álvarez, Guim Ursul, Mario Mingarro, Juan Pablo Cancela, Sara Castro‐Cobo, Robert J. Wilson   +5 more
wiley   +1 more source

Local scour around complex pier groups and combined piles at semi-integral bridge

Journal of Hydrology and Hydromechanics, 2014
This research presents an experimental study on the scouring mechanism at semi-integral bridge piers. Based on laboratory experiments, this study focuses on the relationship between scour depth in complex pier groups and combined piles bridge and various
Akib Shatirah, Jahangirzadeh Afshin, Basser Hossein   +2 more
doaj   +1 more source

Scour process caused by multiple subvertical non-crossing jets

Water Science and Engineering, 2017
The scour process induced by plunging jets is an important topic for hydraulic engineers. In recent decades, several researchers have developed new strategies and methodologies to control the scour morphology, including different jet arrangements and ...
Stefano Pagliara, Michele Palermo
doaj   +1 more source

Changing climates and environments within the complex Middle to Late Pleistocene fill of an overdeepened valley at Niederweningen, Switzerland

Boreas, EarlyView.
Glacially overdeepened valleys in the northern Alpine Foreland preserve Middle to Late Pleistocene sedimentary sequences that may serve as valuable archives for reconstructing past environmental changes in response to shifts in climate. This study presents a multidisciplinary analysis of two sediment cores from the overdeepened Wehntal Valley at ...
Johannes M. Miocic, Nigel Thew, Ruth Drescher‐Schneider, Hans Rudolf Graf, Marlu Kühn, Frank Preusser, Werner H. Schoch, Lucia Wick, Heinz Furrer   +8 more
wiley   +1 more source