Evaluation of Fatigue Damage in Reinforced Concrete Road Slabs by Acoustic Emission

2018 ◽  
Author(s):  
Takahiro Arai ◽  
Minoru Iwai ◽  
Kosuke Furuichi
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Fatigue Damage ◽  
Continuous Monitoring ◽  
Live Load ◽  
Rc Structures ◽  
Damage Degree ◽  
Ae Energy ◽  
Deck Slabs ◽  
Deck Slab

Since reinforced concrete (RC) deck slabs are usually damaged by cyclic live load, it is necessary to monitor the deck slab for operation and maintenance purposes. Acoustic emission (AE) is an excellent technique, which can be used for continuous monitoring and detecting fatigue damages of RC structures. First, the AE was applied for evaluating fatigue damage of RC deck slab with truck wheel traveling test in laboratory. The results showed that there was a correlation between the AE energy and damage degree of the slab. Thus, it was able to presume the damage degree by AE energy. In the next step, a test by vehicle with clear mass in a in‐service bridge was performed. The results of the laboratory and in‐service bridge tests imply that the damage degree of RC deck slab are able to evaluate by AE energy.

Evaluation of Fatigue Damage in Reinforced Concrete Slab by Acoustic Emission.

1999 ◽  
pp. 251-259
Author(s):  
Shigenori YUYAMA ◽  
Zhang-Wang LI ◽  
Takeshi TOMOKIYO ◽  
Masaru YOSHIZAWA ◽  
Taketo UOMOTO
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Fatigue Damage ◽  
Concrete Slab ◽  
Reinforced Concrete Slab

scholarly journals Damage Source Identification of Reinforced Concrete Structure Using Acoustic Emission Technique

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Alireza Panjsetooni ◽  
Norazura Muhamad Bunnori ◽  
Amir Hossein Vakili
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Nondestructive Evaluation ◽  
Analysis Method ◽  
Reinforced Concrete Structure ◽  
Acoustic Emission Technique ◽  
Rc Structures ◽  
Rc Frames ◽  
Damage Monitoring ◽  
Investigation Process

Acoustic emission (AE) technique is one of the nondestructive evaluation (NDE) techniques that have been considered as the prime candidate for structural health and damage monitoring in loaded structures. This technique was employed for investigation process of damage in reinforced concrete (RC) frame specimens. A number of reinforced concrete RC frames were tested under loading cycle and were simultaneously monitored using AE. The AE test data were analyzed using the AE source location analysis method. The results showed that AE technique is suitable to identify the sources location of damage in RC structures.

scholarly journals Monitoring of reinforced concrete short ties with the acoustic emission technique

2019 ◽  
Vol 281 ◽  
pp. 04001
Author(s):  
Djillali Mezhoud ◽  
Jacqueline Saliba
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Structural Integrity ◽  
Tensile Tests ◽  
Average Frequency ◽  
Rc Structures ◽  
Surrounding Matrix ◽  
High Adhesion ◽  
Damage Process ◽  
Different Characteristics

Cracking in Reinforced Concrete (RC) structures may impact their durability and their structural integrity. Cracking is mainly influenced by stress distribution along the interface between steel and concrete. Thus, quantitative evaluation of steel-concrete bond, which is responsible of transferring load from steel bar to the surrounding matrix, and its effect on fracture properties is of major important. An experimental investigation on RC ties is reported in this paper. Tensile tests have been conducted on cubic specimens with different high adhesion reinforcement diameters. Those tests have been monitored continuously using the Acoustic Emission (AE) technique for a better evaluation of the damage process. The results show a good correlation between the load and the AE activity. AE signals with different characteristics have been observed during the different fracture stages. Parameters such as duration and energy increased with the loading level and can be used as indicators to detect the macrocracking of concrete. A parametric analysis is performed between average frequency and RA value. Ib-value of AE hits has been also investigated and decreases to 0.12 prior to the first macro crack.

Study on the Effect of Cl- Concentration on the Corrosion Fatigue Damage in a Rolled AZ31B Magnesium Alloy by Acoustic Emission

2007 ◽  
Vol 353-358 ◽  
pp. 327-330 ◽  
Author(s):  
Hua Mao Zhou ◽  
Jian Qiu Wang ◽  
Qi Shan Zang ◽  
En Hou Han
Keyword(s):  
Acoustic Emission ◽  
Magnesium Alloy ◽  
Energy Release ◽  
Fatigue Damage ◽  
Corrosion Fatigue ◽  
Room Temperature ◽  
Fatigue Performance ◽  
Ae Energy ◽  
Magnesium Alloy Az31b ◽  
Wrought Magnesium Alloy

The fatigue performance of one widely used wrought magnesium alloy AZ31B in rolled form was studied using acoustic emission (AE). AE energy release during corrosion fatigue (CF) testing was measured at room temperature. It is found that AE energy release can express corrosion fatigue damage experienced by the material.

Evaluation of fatigue damage in reinforced concrete slab by acoustic emission

2001 ◽  
Vol 34 (6) ◽  
pp. 381-387 ◽  
Author(s):  
S Yuyama ◽  
Z.-W Li ◽  
M Yoshizawa ◽  
T Tomokiyo ◽  
T Uomoto
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Fatigue Damage ◽  
Concrete Slab ◽  
Reinforced Concrete Slab

Diagnostic of fatigue damage severity on reinforced concrete beam using acoustic emission technique

2014 ◽  
Vol 41 ◽  
pp. 1-9 ◽  
Author(s):  
Noorsuhada Md Nor ◽  
Azmi Ibrahim ◽  
Norazura Muhamad Bunnori ◽  
Hamidah Mohd Saman ◽  
Soffian Noor Mat Saliah ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Fatigue Damage ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Acoustic Emission Technique

scholarly journals Structural Safety Evaluation of Precast, Prestressed Concrete Deck Slabs Cast Using 120-MPa High-Performance Concrete with a Reinforced Joint

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3040 ◽  
Author(s):  
Jae-Hyun Bae ◽  
Hoon-Hee Hwang ◽  
Sung-Yong Park
Keyword(s):  
Reinforced Concrete ◽  
Prestressed Concrete ◽  
High Performance ◽  
Bridge Deck ◽  
Concrete Structures ◽  
Fatigue Performance ◽  
Structural Performance ◽  
Strength Concrete ◽  
Deck Slabs ◽  
Deck Slab

Prestressed concrete structures are used in various fields as they can reduce the cross-sectional area of members compared with reinforced concrete structures. In addition, the use of high-performance and strength concrete can help reduce weight and achieve excellent durability. Recently, structures have increasingly been constructed using high-performance and strength concrete, and therefore, structural verification is required. Thus, this study experimentally evaluated the structural performance of a long-span bridge deck slab joint, regarded as the weak point of structures. The specimens were designed with a 4 m span for application to cable-stayed bridges. To ensure the required load resistance and serviceability, the specimens comprised of 120 MPa high-performance fiber-reinforced concrete and were prestressed. The deck slabs satisfied all static and fatigue performance as well as serviceability requirements, although they were thinner than typical concrete bridge deck slabs. The study also verified whether the deck slabs were suitable to help implement precast segmental construction methods. Finally, the results confirmed that the structural performance of the developed prestressed concrete (PSC) deck slab was sufficient for the intended bridge application as it achieved a sufficiently large safety factor in the static and fatigue performance tests, relative to the design requirement.

Deck slabs of skew girder bridges

1995 ◽  
Vol 22 (3) ◽  
pp. 514-523 ◽  
Author(s):  
Baidar Bakht ◽  
Akhilesh C. Agarwal
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Shear Failure ◽  
Highway Bridges ◽  
Steel Reinforcement ◽  
Fibre Reinforced Concrete ◽  
Girder Bridges ◽  
Deck Slabs ◽  
Concrete Deck ◽  
Deck Slab

Canadian codes allow the design of concrete deck slabs of slab-on-girder bridges by taking account of the internal arching action that develops in these slabs under concentrated wheel loads in particular. Provided that certain prescribed conditions are met, a deck slab is deemed to have met the design criteria if it is provided with a top and a bottom layer of steel reinforcement with each layer consisting of an orthogonal mesh of steel bars in which the area of cross section of the bars in each direction is at least 0.3% of the effective area of cross section of the deck slab. For deck slabs of bridges having skew angles greater than 20°, the codes require the minimum amount of reinforcement to be doubled in the end zones near the skew supports. Model testing has shown that need for such an increase can be eliminated by providing composite end diaphragms with high flexural rigidity in the horizontal plane. The proposed concept is tested on a model of fibre-reinforced concrete deck without steel reinforcement in which deficiencies in the confinement of the deck slab readily manifest themselves in form of a bending, rather than punching shear, failure. Key words: highway bridges, bridge decks, deck slabs, skew deck, skew bridges, fibre-reinforced concrete decks.

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