Results 11 to 20 of about 95,800 (261)

Influences of molding processes and different dispersants on the dispersion of chopped carbon fibers in cement matrix

open access: yesHeliyon, 2018
Chopped carbon fiber-reinforced cement composite (CFRC) has become one of the potential smart materials in recent years. The key process of preparing this kind of composite at the early stage is how to disperse carbon fibers evenly into the cement matrix
Wang Chuang   +5 more
doaj   +1 more source

Numerical Investigation of the Progressive Collapse of the Reinforced Concrete Wall-Frame Structures Considering the Soil–Structure Interaction

open access: yesInternational Journal of Concrete Structures and Materials, 2023
Highlights Progressive collapse was studied in RCSWs frames considering soil–structure interaction. A parametric study of structure and substructures was done on progressive collapse.
Seyed Ali Ekrami Kakhki   +2 more
doaj   +1 more source

Modification of cyanate resin by conjugated tri-component interpenetrating polymer networks

open access: yesJournal of Materials Research and Technology, 2017
Cyanate ester (CE) resin was modified in a multi-component way using the technology of conjugated tri-component interpenetrating polymer networks (CTC-IPN).
Wang Chuang   +5 more
doaj   +1 more source

Evaluation of the Progressive Collapse of the Reinforced Concrete Frames Considering the Soil–Structure Interaction: Parametric Study Based on the Sensitivity Index

open access: yesInternational Journal of Concrete Structures and Materials, 2022
In this essay, to investigate the progressive collapse of the reinforced concrete (RC) frames, a nonlinear static pushdown analysis was performed with column removal scenarios from the first story.
Seyed Ali Ekrami Kakhki   +2 more
doaj   +1 more source

Seismic Retrofitting the Steel Storage Tanks using Single Concave Friction Isolators under the Long Period Earthquakes [PDF]

open access: yesJournal of Rehabilitation in Civil Engineering, 2019
Cylindrical liquid storage tanks are contemplated as vital structures in industrial complex whose nonlinear dynamic behavior is of crucial importance.
Alireza Abdeveis, Alireza Mortezaei
doaj   +1 more source

Evaluation of Seismic Vulnerability of Reinforced Concrete Buildings Adjacent to the Deep Excavations [PDF]

open access: yesJournal of Rehabilitation in Civil Engineering, 2017
In this study, the effect of deep excavation on the seismic response of RC moment resisting building systems has been studied. Deep excavation can cause significant changes in the stress and strain levels of soil environment and also changes in the ...
Hamidreza Fadavi, Alireza Mortezaei
doaj   +1 more source

Preparation, thermal stability and deflection of a density gradient thermally-conductive carbon foam material derived from phenolic resin

open access: yesResults in Physics, 2019
A density (ρ) gradient thermally-conductive (λ) phenolic foam material was initially prepared and it was used as a precursor to prepare a carbon foam (CF) material (ρ-λ-CF).
Wang Chuang   +4 more
doaj   +1 more source

The effect of moment redistribution on the stability of reinforced concrete moment resisting frame buildings under the ground motion [PDF]

open access: yesJournal of Structural and Construction Engineering, 2017
In recent years some studies have been done on the moment rredistribution in buildings and new methods offered for calculating of redistribution. Observations demonstrated that the combination of moment and shear force is important in analysis of ...
Mahdi Golpayegani, Alireza Mortezaei
doaj   +1 more source

Biosynthesis and antioxidation of nano-selenium using lemon juice as a reducing agent

open access: yesGreen Processing and Synthesis, 2021
Green synthesis of nano-selenium from lemon juice, selenium nanoparticles coated with macromolecules, and antioxidant activity.
Wen Su, Hui Yang, Chuang Wang
doaj   +1 more source

Influences of VTMS/SiO2 ratios on the contact angle and morphology of modified super-hydrophobic silicon dioxide material by vinyl trimethoxy silane

open access: yesResults in Physics, 2018
Vinyl trimethoxy silane (VTMS) was used as a modifier and strong ammonia was used as a pH regulator to prepare modified SiO2 superhydrophobic composites. VTMS was successfully in-situ grafted onto the surface of SiO2 via chemical modification.
Chuang Wang   +5 more
doaj   +1 more source

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