scholarly journals Shear failures in reinforced concrete members without transverse reinforcement: An analysis of the critical shear crack development on the basis of test results

2015 ◽  
Vol 103 ◽  
pp. 157-173 ◽  
Author(s):  
Francesco Cavagnis ◽  
Miguel Fernández Ruiz ◽  
Aurelio Muttoni
Keyword(s):  
Reinforced Concrete ◽  
Shear Crack ◽  
Crack Development ◽  
Transverse Reinforcement ◽  
Test Results ◽  
Concrete Members ◽  
Shear Failures

scholarly journals Influence of Fatigue Loading in Shear Failures of Reinforced Concrete Members without Transverse Reinforcement

2015 ◽  
Vol 13 (5) ◽  
pp. 263-274 ◽  
Author(s):  
Miguel Fernández Ruiz ◽  
Carlos Zanuy ◽  
Francisco Natário ◽  
Juan Manuel Gallego ◽  
Luis Albajar ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Fatigue Loading ◽  
Transverse Reinforcement ◽  
Concrete Members ◽  
Shear Failures

An experimental study of crack development in flexural reinforced concrete members

2017 ◽  
Author(s):  
Annette Beedholm Rasmussen ◽  
Bjarke Würtz Sørensen ◽  
Mikkel Skov ◽  
Peter Kolt Rasmussen ◽  
Lars Germa Hagsten
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Crack Development ◽  
Concrete Members

Cracking behaviour of concrete beams reinforced with fiber reinforced plastic rebars

1996 ◽  
Vol 23 (6) ◽  
pp. 1172-1179 ◽  
Author(s):  
R. Masmoudi ◽  
B. Benmokrane ◽  
O. Chaallal
Keyword(s):  
Reinforced Concrete ◽  
Crack Width ◽  
Concrete Beams ◽  
Reinforcement Ratio ◽  
Test Results ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Concrete Members ◽  
Reinforced Plastic ◽  
Cracking Pattern

This paper presents the results of an experimental investigation on the cracking behaviour of concrete beams reinforced with fiber reinforced plastic rebars. The effects of reinforcement ratio on the cracking pattern, crack spacing, cracking moment, and crack width are investigated. The test results indicate that the reinforcement ratio has no meaningful effect on the cracking moment, which can be calculated as recommended by the ACI code. Also, the use of the equations adopted by ACI and the European codes for the prediction of crack width of conventionally reinforced concrete members is investigated and due modifications are made. Both relationships show good correlation with the test results; and the prediction of crack width of concrete beams reinforced with these two types of fiber reinforced plastic rebars is now possible. Key words: beam, cracking behaviour, cracking moment, crack width, fiber reinforced plastic, flexure, rebars, reinforced concrete, reinforcement ratio.

scholarly journals The influence of longitudinal reinforcement on shear capacity of reinforced concrete members without shear reinforcement

2014 ◽  
Vol 13 (3) ◽  
pp. 151-158
Author(s):  
Marta Słowik
Keyword(s):  
Reinforced Concrete ◽  
Shear Capacity ◽  
Longitudinal Reinforcement ◽  
Test Results ◽  
Shear Reinforcement ◽  
Professional Literature ◽  
Model Code ◽  
Concrete Members ◽  
Eurocode 2 ◽  
Model Code 2010

In the paper, the influence of longitudinal reinforcement on shear capacity of reinforced concrete members without shear reinforcement is discussed. The problem is analyzed on the basis of the author’s own test results and tests results reported in the professional literature. It has been concluded that longitudinal reinforcement has an effect on shear capacity especially in members of shear span-to-depth ratio a/d < 2,5. The test results have also been used to verify standard methods of calculating the shear capacity in reinforced concrete members without shear reinforcement given in Eurocode 2, ACI Standard 318 and Model Code 2010.

scholarly journals Use of advanced embedded piezoceramic sensors for the non-destructive evaluation of reinforced concrete

2021 ◽  
Author(s):  
Dan Hughi
Keyword(s):  
Reinforced Concrete ◽  
Health Monitoring ◽  
Shear Crack ◽  
Internal Crack ◽  
Monitoring Systems ◽  
Nuclear Facilities ◽  
Concrete Members ◽  
Oil Platforms ◽  
World Demand ◽  
Non Destructive

The present investigation deals with the development, and implementation, of embedded ultrasonic piezoceramic sensors as part of an active non-destructive health monitoring system for reinforced concrete members. As the world demand for economic, and sustainable energy rises, so does the demand for continuous structural health monitoring systems for high-importance structures such as, oil platforms and nuclear facilities. These facilities require the most reliable, and durable, monitoring systems in order to ensure their most economic, yet prudent operation. The proposed system was evaluated as a means for determining the development of concrete’s early strength, as well as detecting first cracking in concrete. A series of small and full-scale concrete specimens were tested, and a relationship was drawn between the internal crack width of the members and the signal output of the proposed system. The MIRA 3D tomographer was also investigated for detecting the punching shear crack of thick concrete slabs.

scholarly journals Elongation and load deflection characteristics of reinforced concrete members containing plastic hinges

1993 ◽  
Vol 26 (1) ◽  
pp. 28-41 ◽  
Author(s):  
R. C. Fenwick ◽  
L. M. Megget
Keyword(s):  
Reinforced Concrete ◽  
Plastic Hinge ◽  
Major Influence ◽  
Test Results ◽  
Design Practice ◽  
Plastic Hinges ◽  
Concrete Members ◽  
Different Types ◽  
Current Design ◽  
Hinge Zone

In regions, described as plastic hinge zones, in beams and columns, tensile yielding of the reinforcement through flexural action can occur in severe earthquakes. Where the beams and columns are lightly loaded, axially, member elongation can occur. Test results show that axial extensions of the order of several percent of the member depth may be expected. This deformation, which is ignored in current design practice, can have a major influence on the distribution of forces in a structure and its ability to survive without collapse. This paper describes the way in which elongation develops in plastic hinge zones together with the form of load deflection characteristics associated with the development of different types of plastic hinge zone.

scholarly journals Use of advanced embedded piezoceramic sensors for the non-destructive evaluation of reinforced concrete

2021 ◽  
Author(s):  
Dan Hughi
Keyword(s):  
Reinforced Concrete ◽  
Health Monitoring ◽  
Shear Crack ◽  
Internal Crack ◽  
Monitoring Systems ◽  
Nuclear Facilities ◽  
Concrete Members ◽  
Oil Platforms ◽  
World Demand ◽  
Non Destructive

The present investigation deals with the development, and implementation, of embedded ultrasonic piezoceramic sensors as part of an active non-destructive health monitoring system for reinforced concrete members. As the world demand for economic, and sustainable energy rises, so does the demand for continuous structural health monitoring systems for high-importance structures such as, oil platforms and nuclear facilities. These facilities require the most reliable, and durable, monitoring systems in order to ensure their most economic, yet prudent operation. The proposed system was evaluated as a means for determining the development of concrete’s early strength, as well as detecting first cracking in concrete. A series of small and full-scale concrete specimens were tested, and a relationship was drawn between the internal crack width of the members and the signal output of the proposed system. The MIRA 3D tomographer was also investigated for detecting the punching shear crack of thick concrete slabs.

scholarly journals The Mechanical Properties of Centrifuged Concrete in Reinforced Concrete Structures

2020 ◽  
Vol 10 (10) ◽  
pp. 3570
Author(s):  
Romualdas Kliukas ◽  
Ona Lukoševičienė ◽  
Arūnas Jaras ◽  
Bronius Jonaitis
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Concrete Strength ◽  
Concrete Structures ◽  
High Strength ◽  
Reinforcement Ratio ◽  
Transverse Reinforcement ◽  
Reinforced Concrete Structures ◽  
Test Results ◽  
Moduli Of Elasticity

This article explores the influence of transverse reinforcement (spiral) and high-strength longitudinal reinforcements on the physical-mechanical properties of centrifuged annular cross-section elements of concrete. The test results of almost 200 reinforced, and over 100 control elements are summarizing in this article. The longitudinal reinforcement ratio of samples produced in the laboratory and factory varied from 1.0% to 6.0%; the transverse reinforcement ratio varied from 0.25% to 1.25%; the pitch of spirals varied from 100 mm to 40 mm and the concrete strength varied from 25 MPa to 60 MPa. Experimental relationships of coefficients for concrete strength, moduli of elasticity and limits of the longitudinal strain of centrifuged concrete in reinforced concrete structures in short-term concentrically compression were proposed.

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