Non-destructive testing to evaluate soundness of adhesive portion around anchor bolts in concrete by elastic-wave simulation analysis-based electromagnetic pulse

2014 ◽  
pp. 1931-1936
Author(s):  
H Miyata ◽  
K Tanaka ◽  
S Uchida ◽  
T Kamada ◽  
K Nishigami ◽  
...  
Keyword(s):  
Elastic Wave ◽  
Electromagnetic Pulse ◽  
Simulation Analysis ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Wave Simulation ◽  
Anchor Bolts ◽  
Non Destructive

scholarly journals Structural Evaluation of Corten Steel Ancillary Highway Structures

2020 ◽  
Author(s):  
Wael Zatar ◽  
Hai Nguyen ◽  
Hien Nghiem
Keyword(s):  
Good Condition ◽  
Assessment Method ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Inspection Method ◽  
Structural Evaluation ◽  
Interstate Highway System ◽  
Bridge Superstructure ◽  
Anchor Bolts ◽  
Non Destructive

This paper investigates an assessment method for Corten steel (CS) ancillary structures on the Charleston interstate highway system (I-64, I-77, and I-79). Nineteen CS bridge-mounted ancillary support (CS-BMAS) structures (i.e., ancillary structures are attached to bridge superstructure) were examined by non-destructive testing techniques. Ultrasonic testing (UT) was used to inspect key components of the ancillary sign structures (e.g., anchor bolts, connection brackets, etc.) while the other components were assessed by a conventional visual inspection method. The CS-BMAS structures were rated at both the overall and element levels (each ancillary structure includes more than ten elements/components such as foundations/concrete in the vicinity of connections, mounting plates, anchor bolts, vertical tubular members and their connections, truss members and connections). The element level ratings were based on the proposed rating criteria and score. The overall condition of each ancillary structure was then obtained by the normalized S/S<sub>max</sub> ratio (where S is the total score of each structure and S<sub>max</sub> is maximum possible total score). The results revealed that most of the CS-BMAS structures performed satisfactorily after more than four decades of service and exposure to harsh environmental conditions. Specifically, two ancillary sign structures (11%) were rated as good condition, 16 structures (84%) were rated as fair condition, and one structure (5%) was found to be in poor condition.

Nonlinear Acoustics in Non-Destructive Testing - From Theory to Experimental Application

2013 ◽  
Vol 588 ◽  
pp. 192-201 ◽  
Author(s):  
Dariusz Broda ◽  
Andrzej Klepka ◽  
Wieslaw Jerzy Staszewski ◽  
Fabrizio Scarpa
Keyword(s):  
Elastic Wave ◽  
Wave Interaction ◽  
Nonlinear Effects ◽  
Nonlinear Acoustics ◽  
Nonlinear Phenomena ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Contact Acoustic Nonlinearity ◽  
Non Destructive ◽  
Damaged Materials

A growing interest in non-destructive testing methods based on nonlinear acoustics have been observed for the last ten fifteen years. The majority of methods in this area take their origin from the observation that fatigue damaged materials often behave like mesoscopic nonlinear materials (e.g. rocks) in which nonlinear phenomena have been observed for years. The most important phenomena include: higher harmonics generation, vibro-acoustic wave modulations, amplitude dependent resonance frequency shift and slow dynamic effects. All these phenomena result mainly from elastic wave interactions with contact-type defects. There is enough experimental evidence in the literature showing that these nonlinear effects are much more distinct in damaged materials than in intact ones. Despite the fact that many experimental techniques - based on nonlinear acoustic phenomena - have been developed for the last ten years, the physical mechanism of elastic wave interaction with damage materials still not clear. The main reason is the variety of possible nonlinear mechanisms involved. This includes: nonlinear elasticity and dissipation, contact acoustic nonlinearity based on herztian and rough surfaces contact theories and other effects such us adhesion, friction and thermoelasticity. This paper provides a short summary of various theoretical developments and examples of applications to damage detection in different materials.

scholarly journals Structural Evaluation of Corten Steel Ancillary Highway Structures

2020 ◽  
Author(s):  
Wael Zatar ◽  
Hai Nguyen ◽  
Hien Nghiem
Keyword(s):  
Good Condition ◽  
Assessment Method ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Inspection Method ◽  
Structural Evaluation ◽  
Interstate Highway System ◽  
Bridge Superstructure ◽  
Anchor Bolts ◽  
Non Destructive

This paper investigates an assessment method for Corten steel (CS) ancillary structures on the Charleston interstate highway system (I-64, I-77, and I-79). Nineteen CS bridge-mounted ancillary support (CS-BMAS) structures (i.e., ancillary structures are attached to bridge superstructure) were examined by non-destructive testing techniques. Ultrasonic testing (UT) was used to inspect key components of the ancillary sign structures (e.g., anchor bolts, connection brackets, etc.) while the other components were assessed by a conventional visual inspection method. The CS-BMAS structures were rated at both the overall and element levels (each ancillary structure includes more than ten elements/components such as foundations/concrete in the vicinity of connections, mounting plates, anchor bolts, vertical tubular members and their connections, truss members and connections). The element level ratings were based on the proposed rating criteria and score. The overall condition of each ancillary structure was then obtained by the normalized S/S<sub>max</sub> ratio (where S is the total score of each structure and S<sub>max</sub> is maximum possible total score). The results revealed that most of the CS-BMAS structures performed satisfactorily after more than four decades of service and exposure to harsh environmental conditions. Specifically, two ancillary sign structures (11%) were rated as good condition, 16 structures (84%) were rated as fair condition, and one structure (5%) was found to be in poor condition.

Non destructive testing of works of art by terahertz analysis

2013 ◽  
Vol 64 (2) ◽  
pp. 21001 ◽  
Author(s):  
Jean-Luc Bodnar ◽  
Jean-Jacques Metayer ◽  
Kamel Mouhoubi ◽  
Vincent Detalle
Keyword(s):  
Non Destructive Testing ◽  
Destructive Testing ◽  
Works Of Art ◽  
Non Destructive
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