Results 1 to 10 of about 9,542,086 (200)

Application of X-Shaped CFRP Ropes for Structural Upgrading of Reinforced Concrete Beam–Column Joints under Cyclic Loading–Experimental Study

Fibers, 2021
The effectiveness of externally applied fiber-reinforced polymer (FRP) ropes made of carbon fibers in X-shape formation and in both sides of the joint area of reinforced concrete (RC) beam–column connections is experimentally investigated. Six full-scale
Emmanouil Golias, Adamantis G. Zapris, Violetta K. Kytinou, Mourhat Osman, Michail Koumtzis, Danai Siapera, Constantin E. Chalioris, Chris G. Karayannis   +7 more
doaj   +1 more source

Efficacy and Damage Diagnosis of Reinforced Concrete Columns and Joints Strengthened with FRP Ropes Using Piezoelectric Transducers

Sensors, 2022
Recent research has indicated that the implantation of a network of piezoelectric transducer patches in element regions of potential damage development, such as the beam–column joint (BCJ) area, substantially increases the efficacy and accuracy of the ...
Chris G. Karayannis, Emmanouil Golias, Maria C. Naoum, Constantin E. Chalioris   +3 more
doaj   +1 more source

Numerical Analysis Exterior RC Beam-Column Joints with CFRP Bars as Beam’s Tensional Reinforcement under Cyclic Reversal Deformations

Applied Sciences, 2022
In this paper the cyclic lateral response of reinforced concrete (RC) beam-column joints with composite carbon fiber-reinforced polymer (CFRP) bars as a longitudinal reinforcement in the beam is simulated with finite element (FE) modeling using software ...
Violetta K. Kytinou, Parthena-Maria K. Kosmidou, Constantin E. Chalioris   +2 more
doaj   +1 more source

Study of genetic variation and its association with tensile strength among bamboo species through whole genome resequencing

Frontiers in Plant Science, 2022
Moso bamboo (Phyllostachys edulis) is a versatile plant species that is widely used as a construction material by many low-income countries due to the lack of major construction materials such as steel and reinforced concrete.
Lorenzo Del Giudice, Christos Bazakos, Christos Bazakos, Christos Bazakos, Christos Bazakos, Michalis F. Vassiliou   +5 more
doaj   +1 more source

Influence of Carbon Fiber-Reinforced Ropes Applied as External Diagonal Reinforcement on the Shear Deformation of RC Joints

Fibers, 2022
The use of the innovative material of Carbon Fiber-Reinforced (C-FRP) ropes as external near surface mounted reinforcement for the strengthening of reinforced concrete beam-column joints is studied.
Chris Karayannis, Emmanouil Golias, George I. Kalogeropoulos   +2 more
doaj   +1 more source

Flexural Damage Diagnosis in Reinforced Concrete Beams Using a Wireless Admittance Monitoring System—Tests and Finite Element Analysis

Sensors, 2021
The utilization and effectiveness of a custom-made, portable and low-cost structural health monitoring (SHM) system that implements the PZT-based electro-mechanical admittance (EMA) methodology for the detection and evaluation of the damage of flexural ...
Constantin E. Chalioris, Violetta K. Kytinou, Maristella E. Voutetaki, Chris G. Karayannis   +3 more
doaj   +1 more source

Cracking Diagnosis in Fiber-Reinforced Concrete with Synthetic Fibers Using Piezoelectric Transducers

Fibers, 2022
The addition of short fibers in concrete mass offers a composite material with advanced properties, and fiber-reinforced concrete (FRC) is a promising alternative in civil engineering applications.
Maristella E. Voutetaki, Maria C. Naoum, Nikos A. Papadopoulos, Constantin E. Chalioris   +3 more
doaj   +1 more source

U-Jacketing Applications of Fiber-Reinforced Polymers in Reinforced Concrete T-Beams against Shear—Tests and Design

Fibers, 2020
The application of externally bonded fiber-reinforced polymer (EB-FRP) as shear transverse reinforcement applied in vulnerable reinforced concrete (RC) beams has been proved to be a promising strengthening technique.
Constantin E. Chalioris, Adamantis G. Zapris, Chris G. Karayannis   +2 more
doaj   +1 more source

An Electromechanical Impedance-Based Application of Realtime Monitoring for the Load-Induced Flexural Stress and Damage in Fiber-Reinforced Concrete

Fibers, 2023
Effective real-time structural health monitoring in concrete structures is paramount to evaluating safety conditions and the timely maintenance of concrete structures.
Maria C. Naoum, George M. Sapidis, Nikos A. Papadopoulos, Maristella E. Voutetaki   +3 more
doaj   +1 more source

Reinforced Concrete Beams with Carbon-Fiber-Reinforced Polymer Bars—Experimental Study

Fibers, 2018
Innovative reinforcement as fiber-reinforced polymer (FRP) bars has been proposed as alternative for the substitution of the traditional steel bars in reinforced concrete (RC) structures.
Chris G. Karayannis, Parthena-Maria K. Kosmidou, Constantin E. Chalioris   +2 more
doaj   +1 more source