Results 21 to 30 of about 3,370,694 (310)

Nimble in a pandemic: Lessons learned from Concrete Jungle’s Grocery Delivery Program

open access: yesJournal of Agriculture, Food Systems, and Community Development, 2021
First paragraph: As a leader in Atlanta’s fresh produce supply chain for people with limited access to fruits and vegetables, Concrete Jungle (CJ) has established a robust network of partnerships with food and social service community organizations to
Rachel Blacher, Nichole Fields-Kyle
doaj   +1 more source

Theoretical stress strain model for confined concrete

open access: yes, 1988
A stress‐strain model is developed for concrete subjected to uniaxial compressive loading and confined by transverse reinforcement. The concrete section may contain any general type of confining steel: either spiral or circular hoops; or rectangular ...
J. Mander, M. Priestley, R. Park
semanticscholar   +1 more source

Experimental Study on Fatigue Crack Propagation of High-Strength Steel Wire with Initial Defects for Bridge Cables

open access: yesApplied Sciences, 2020
In order to study the effect of initial defects on fatigue crack propagation law, a test method to identify fatigue crack propagation rate and path based on load waveform variation was presented, and a new test device was designed to apply fatigue ...
Ying Wang   +3 more
doaj   +1 more source

Field Measurement and Theoretical Analysis of Sidewall Roughness on Shaft Resistance of Rock-Socketed Piles

open access: yesJournal of Marine Science and Engineering, 2023
Sidewall roughness is a key factor influencing the shaft resistance of rock-socketed piles. Owing to the difficulties in onsite measuring and the inconsistency in quantitatively characterizing the roughness degree of sidewalls, existing approaches for ...
Jun Liu   +3 more
doaj   +1 more source

Application of non-metallic composite reinforcement for contact line supports [PDF]

open access: yesMATEC Web of Conferences, 2020
The technology for pre-stressing and anchoring of the composite rebar was developed. It makes possible to reinforce concrete products and produce the contact line supports of high quality, which possesses advantages in comparison with the steel ...
Nikolaev Valery   +2 more
doaj   +1 more source

Seismic Fragility Analysis of the Reinforced Concrete Continuous Bridge Piers Based on Machine Learning and Symbolic Regression Fusion Algorithms

open access: yesShock and Vibration, 2021
In the fragility analysis, researchers mostly chose and constructed seismic intensity measures (IMs) according to past experience and personal preference, resulting in large dispersion between the sample of engineering demand parameter (EDP) and the ...
Hanbo Zhu, Changqing Miao
doaj   +1 more source

Effect of Wet-Dry Cycles on the Mechanical Performances and Microstructure of Pisha Sandstone

open access: yesMolecules, 2023
The effects of the wet–dry cycles on the chemical compositions, microstructure, and mechanical properties of Pisha sandstone were experimentally investigated in the current study.
Yanbing Zhao   +5 more
doaj   +1 more source

Experimental Study on Seismic Behavior of Precast Bolt-Connected Steel-Members End-Embedded Concrete (PBSEC) Beam-Column Connections

open access: yesBuildings, 2022
With the rapid development and research of precast concrete frame structures, it is not difficult to find that the structural form and seismic performance of dry-connected precast joints have always been the focus of research.
Zhun Wang, De-Cheng Feng, Gang Wu
doaj   +1 more source

Concrete fibrations [PDF]

open access: yesNotre Dame J. Formal Logic 58, no. 2 (2017), 179-204, 2011
As far as we know no notion of concreteness for fibrations exists. We introduce such a notion and discuss some basic results about it.
arxiv   +1 more source

Concrete mathematics - a foundation for computer science

open access: yes, 1991
From the Publisher: This book introduces the mathematics that supports advanced computer programming and the analysis of algorithms. The primary aim of its well-known authors is to provide a solid and relevant base of mathematical skills - the skills ...
R. Graham, D. Knuth, Oren Patashnik
semanticscholar   +1 more source

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