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.

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.

Assessment of Timber Structures Using the X-Ray Technology

2013 ◽  
Vol 778 ◽  
pp. 321-327 ◽  
Author(s):  
Steffen Franke ◽  
Bettina Franke ◽  
Florian Scharmacher
Keyword(s):  
Assessment Method ◽  
Normal Function ◽  
Structural Timber ◽  
Timber Structures ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
X Ray ◽  
Existing Structures ◽  
Effective Assessment ◽  
Non Destructive

The assessment of timber structures is a permanent task to check the normal function of individual structural timber elements. Non-destructive testing methods are preferred but the value of the information is limited due to the performance of the applied assessment method. However, X-ray is a technology which allows a view into the structural member or the connections. The mobile X-ray technology has been used in laboratory tests and practical situations at existing structures and led to excellent results which allowed detailed analyses. The method and its possibilities for non-destructive testing of timber structures will be presented. The results reached show a high potential for an effective assessment of existing structures including connections and structural timber members.

scholarly journals Pipeline In-Line Inspection Method, Instrumentation and Data Management

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3862
Author(s):  
Qiuping Ma ◽  
Guiyun Tian ◽  
Yanli Zeng ◽  
Rui Li ◽  
Huadong Song ◽  
...  
Keyword(s):  
Data Management ◽  
Petroleum Products ◽  
Metal Loss ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Inspection Method ◽  
Safety Issues ◽  
Pipeline Inspection ◽  
Inspection Systems ◽  
Non Destructive

Pipelines play an important role in the national/international transportation of natural gas, petroleum products, and other energy resources. Pipelines are set up in different environments and consequently suffer various damage challenges, such as environmental electrochemical reaction, welding defects, and external force damage, etc. Defects like metal loss, pitting, and cracks destroy the pipeline’s integrity and cause serious safety issues. This should be prevented before it occurs to ensure the safe operation of the pipeline. In recent years, different non-destructive testing (NDT) methods have been developed for in-line pipeline inspection. These are magnetic flux leakage (MFL) testing, ultrasonic testing (UT), electromagnetic acoustic technology (EMAT), eddy current testing (EC). Single modality or different kinds of integrated NDT system named Pipeline Inspection Gauge (PIG) or un-piggable robotic inspection systems have been developed. Moreover, data management in conjunction with historic data for condition-based pipeline maintenance becomes important as well. In this study, various inspection methods in association with non-destructive testing are investigated. The state of the art of PIGs, un-piggable robots, as well as instrumental applications, are systematically compared. Furthermore, data models and management are utilized for defect quantification, classification, failure prediction and maintenance. Finally, the challenges, problems, and development trends of pipeline inspection as well as data management are derived and discussed.

Infrared Thermography Non-Destructive Testing of Composite Materials

2011 ◽  
Vol 291-294 ◽  
pp. 1307-1310 ◽  
Author(s):  
Cui Qin Wu ◽  
Wei Ping Wang ◽  
Qi Gang Yuan ◽  
Yan Jun Li ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Composite Materials ◽  
Infrared Thermography ◽  
Fiber Composite ◽  
High Energy ◽  
Non Destructive Testing ◽  
Solid Rocket Motor ◽  
Destructive Testing ◽  
Inspection Method ◽  
Active Infrared Thermography ◽  
Non Destructive

To detect the delamination, disbond，inclusion defects of the glass fiber composite materials applied in the solid rocket motor, active infrared thermographic non-destructive testing(NDT) is researched. The samples including known defects are heated by pulsed high energy flash lamp. The surface temperature of the samples is monitored by infrared thermography camera. The results of the experiments show that the active infrared thermography technique is a fast and effective inspection method for detecting the defects of delamination, disbond，inclusion of the composites. The samples are also detected by underwater ultrasonic c-scans. The paper concludes that the active infrared thermography NDT is more suitable to rapidly detect the defect in large-area and the underwater ultrasonic c-scans is more suitable to quantitatively identify the defect in local-area.

Research on the Method for Drill Pipe Thread Inspection

2006 ◽  
Vol 321-323 ◽  
pp. 472-475
Author(s):  
Jin Feng Ding ◽  
Yi Hua Kang ◽  
Xin Jun Wu
Keyword(s):  
Working Conditions ◽  
Laboratory Testing ◽  
Smooth Surface ◽  
Drill Pipe ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Inspection Method ◽  
Drill Pipes ◽  
Thread Root ◽  
Non Destructive

Failure of the drill pipe thread is always a very serious problem which may result in serious accidents and rework during the drilling of oil wells. Rupture crack of the drill pipe thread may result in great economic and labour losses, so they need to be inspected periodically. As the drill pipe thread is not a smooth surface and is in the end area of drill pipes, it is very difficult to be inspected by traditional Non-destructive testing (NDT) methods. According to the experiment results and the requirement of the working conditions in the field, a local MFL inspection method, which is the most adaptive inspection method, is determined. Laboratory testing and field experience show that this inspection method can detect the crack as small as 0.6mm (depth) in the thread root and thus reduces the risks of drilling failure. This local MFL inspection method can inspect flaws of the drill pipe thread that occur in practice exactly and quickly, and it has very wide application perspectives.

scholarly journals Uncertainty in condition prediction of bridges based on assessment method – case study in Estonia

2019 ◽  
Author(s):  
Sander Sein ◽  
Juhan Idnurm ◽  
José C. Matos
Keyword(s):  
Continuous Time ◽  
Visual Inspection ◽  
Assessment Method ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Inference Procedure ◽  
Wrong Decision ◽  
Traditional Assessment ◽  
Non Destructive

<p>In this paper the uncertainty in condition assessment based on most common assessment methods, visual inspection and non-destructive testing, is investigated. For decision-making the averaged or estimated value is suitable, but if the basis of a decision is only a subjective visual inspection, then it could lead to a wrong decision. The second most traditional assessment method is non-destructive testing (NDT), which can give reliable results, but the interpretation of measurement is needed. To investigate the errors in both evaluations, benchmarking tests were carried out in Estonia within two groups, a group of experienced inspectors and a group of unexperienced students, to show how the importance of experience affects results. To present the influence of assessment uncertainty to condition prediction curves based on continuous-time Markov model are calculated and for updating, Bayesian inference procedure is used.</p>

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