Results 41 to 50 of about 26,875 (228)
NASA's Great Observatories Kit [PDF]
Using this kit, students may construct paper models of the Hubble Space Telescope, the Chandra X-Ray Observatory, and the Compton Gamma Ray Observatory. Parts sheets for printing, instructions, and a list of other required materials are included.
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Investigation of the Dowel and Friction Forces in Fiber Reinforced Ultra High Performance Concrete Beams [PDF]
Engineering and Technology Journal, 2012 The phenomenon of dowel action as a shear transfer mechanism across cracks has long been recognized as an important component of the overall shear resistance capacity of reinforced concrete beams.
Kaiss F. Sarsam +2 more
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Incremental upper bound modeling of concrete failures in timber‐concrete notched connections
Structural Concrete, EarlyView.Abstract This paper introduces a novel theoretical framework for developing incremental upper bound solutions, which is applied to predict the response of two local concrete failures in timber‐concrete composite (TCC) decks with notched connections. The new approach enables a prediction of the capacity at the onset of failure as well as the entire post‐
Peter K. Rasmussen +3 more
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Performance Evaluation of Open Graded Base Course with Doweled and Non-Doweled Transverse Joints [PDF]
, 2010 The objectives of this study were to investigate the performance of 20-year old doweled/non-doweled and dense-graded/permeable base test sections on three concrete pavement segments in Wisconsin: USH 18/151 in Iowa and Dane counties, STH 29 in Brown ...
Crovetti, James +2 more
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BuildingsTransverse joints are introduced in jointed plain concrete pavement systems to mitigate the risk of cracks that can develop due to shrinkage and temperature variations.
Saima Yaqoob +2 more
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Welding of thermally modified hornbeam [PDF]
Drvna Industrija, 2009 Welding of dowels in the base is carried out by technology of rotation welding. During welding, a physical-chemical process takes place as a result of mechanical friction because of dowel rotation and impression into the static base with the set ...
Ivica Župčić +4 more
doaj
Nonlinear analysis of flat post‐tensioned concrete slab–edge column connections
Structural Concrete, EarlyView.Abstract This study presents nonlinear finite element analyses to investigate the punching shear behavior of unbonded post‐tensioned concrete flat slabs at slab‐edge column connections. A parametric analysis was conducted to evaluate the influence of four critical parameters on the punching shear resistance: the distribution of prestressing tendons ...
Igor Gonçalves +4 more
wiley +1 more source
The influences of the number of concrete dowels to shear resistance based on push out tests
Fracture and Structural Integrity, 2022 To reduce the depth of floor-beam structures and to save the cost of headed-shear studs, many types of shallow composite beam have been developed during the last few years. Among them, the shallow-hollow steel beam consists of web openings, infilled with
Anh-Tuan Vu +3 more
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Structural Concrete, EarlyView.Abstract Compression field approaches such as the Cracked Membrane Model with fixed, interlocked cracks (CMM‐F) are efficient tools for the mechanical modeling of reinforced concrete elements, providing the mechanical model σ=fε$$ \boldsymbol{\upsigma} =f\left(\boldsymbol{\upvarepsilon} \right) $$ required for finite element analyses.
Andreas Näsbom +2 more
wiley +1 more source
Optical communications system Patent [PDF]
, 1969 Specifications and drawings for semipassive optical communication ...
Thomas, N. E.
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