Nondestructive evaluation of grout defects in internal tendons of post-tensioned girders

Terzioglu, Tevfik; Karthik, Madhu M.; Hurlebaus, Stefan; Hueste, Mary Beth D.; Maack, Stefan; Woestmann, Jens; Wiggenhauser, Herbert; Krause, Martín; Miller, Patrick K.; Olson, Larry D.

doi:10.1016/j.ndteint.2018.05.013

Cited by 22 publications

(8 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This technology [11] consists of simultaneously sending and receiving ultrasonic waves through a material, using several transmitters/transducers at frequencies ranging from 25 to 75 kHz.…”

Section: The Us Tomography For Detecting Voids In Prestressing Tendonsmentioning

confidence: 99%

Technological developments as an answer to bridge management challenges

Orcesi

Godart

Gaillet

et al. 2019

IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management

View full text Add to dashboard Cite

Bridge management is a challenge as owners have to deal with limited financial resources to maintain the functionalities and safety of ageing structures. Demands on transportation networks change, due to regulatory developments, society's evolution and shifts with high expectations on the operational performance of roadway bridges with reduced congestion, delay, and accidents. To minimize intrusion in the transport flow, inspection and monitoring methods should be non-destructive, minimally invasive. They should be capable of yielding rapid and accurate inspection results allowing an adequate response from the asset manager. Research aims at including autonomously operating equipment (e.g. robotics), non-intrusive (remote or proximity) observation techniques, or other methods that ensure quality and performance control of the roadway bridges in time, more safely, more quickly and/or to a higher degree of accuracy and precision.The innovation subgroup in COST action TU1406 investigates novel condition monitoring and sensing technologies for the assessment of structural serviceability and safety. Advanced, integrated, cost-effective and reliable instrumentation solutions, techniques and concepts are looked at with the aim to provide data, that will be used to compute innovative performance indicators. In this context, this paper briefly reminds some significant challenges associated with bridge management and presents three examples of innovation in bridge monitoring and NDT investigation techniques.

show abstract

“…This technology [11] consists of simultaneously sending and receiving ultrasonic waves through a material, using several transmitters/transducers at frequencies ranging from 25 to 75 kHz.…”

Section: The Us Tomography For Detecting Voids In Prestressing Tendonsmentioning

confidence: 99%

Technological developments as an answer to bridge management challenges

Orcesi

Godart

Gaillet

et al. 2019

IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management

View full text Add to dashboard Cite

show abstract

“…The application of an appropriate approach to the monitoring of structures, as proposed, e.g., in [ 34 , 35 ] and in particular, the monitoring of cable post-tensioned concrete girders [ 33 , 36 ] as well as NDT material testing and repair of such elements [ 37 ] as a long-term solution, may lead to benefits that cannot be achieved otherwise, saving time and avoiding costs. Attention may also be drawn to the increasing spread of new, innovative materials for the protection and strengthening of concrete structures, such as nanomaterials [ 38 , 39 ] or composite materials [ 40 , 41 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Elements of Pathway for Quick and Reliable Health Monitoring of Concrete Behavior in Cable Post-Tensioned Concrete Girders

et al. 2021

View full text Add to dashboard Cite

The paper discusses the problems connected with long-term exploitation of reinforced concrete post-tensioned girders. The scale of problems in the world related to the number of cable post-tensioned concrete girders built in the 1950s and still in operation is very large and possibly has very serious consequences. The paper presents an analysis and evaluation of the results of measurements of the deflection and strength and homogeneity of concrete in cable–concrete roof girders of selected industrial halls located in Poland, exploited for over 50 years. On the basis of the results of displacement monitoring in the years 2009–2020, the maximum increments of deflection of the analyzed girders were determined. Non-destructive, destructive, and indirect evaluation methods were used to determine the compressive strength of concrete. Within the framework of the indirect method recommended in standard PN-EN 13791, a procedure was proposed by the authors to modify the so-called base curve for determining compressive strength. Due to the age of the analyzed structural elements, a correction factor for the age of concrete was taken into account in the strength assessment. The typical value of the characteristic compressive strength is within the range 20.3–28.4 MPa. As a result of the conducted tests, the concrete class assumed in the design was not confirmed, and its classification depended on the applied test method. The analyzed girders, in spite of their long-term exploitation, can be still used for years on the condition that regular periodical inspections of their technical condition are carried out. The authors emphasize the necessity for a permanent and cyclic diagnostic process and monitoring of the geometry of girders, as they are expected to operate much longer than was assumed by their designers.

show abstract

“…Terzioglu et al utilized ultrasonic to inspect the defect location and severity in a full-size, post-tensioned U-girder specimen. The study clearly showed that in the anchorage area, ultrasound can estimate the severity of the grouting defect in the internal tendons [21]. As a non-destructive testing method with single detection surface, the impact-echo method is widely used in concrete structures [22].…”

Section: Introductionmentioning

confidence: 99%

Detecting of the Longitudinal Grouting Quality in Prestressed Curved Tendon Duct Using Piezoceramic Transducers

Jiang

Zhang

et al. 2020

Sensors

View full text Add to dashboard Cite

To understand the characteristics of longitudinal grouting quality, this paper developed a stress wave-based active sensing method using piezoceramic transducers to detect longitudinal grouting quality of the prestressed curved tendon ducts. There were four lead zirconate titanate (PZT) transducers installed in the same longitudinal plane. One of them, mounted on the bottom of the curved tendon duct, was called as an actuator for generating stress waves. The other three, pasted on the top of the curved tendon duct, were called as sensors for detecting the wave responses. The experimental process was divided into five states during the grouting, which included 0%, 50%, 75%, 90%, and 100% grouting. The voltage signals, power spectral density (PSD) energy and wavelet packet energy were adopted in this research. Experimental results showed that all the amplitudes of the above analysis indicators were small before the grouting reached 90%. Only when the grouting degree reached the 100% grouting, these parameters increased significantly. The results of different longitudinal PZT sensors were mainly determined by the distance from the generator, the position of grouting holes, and the fluidity of grouting materials. These results showed the longitudinal grouting quality can be effectively evaluated by analyzing the difference between the signals received by the PZT transducers in the curved tendon duct. The devised method has certain application value in detecting the longitudinal grouting quality of prestressed curved tendon duct.

show abstract

Nondestructive evaluation of grout defects in internal tendons of post-tensioned girders

Cited by 22 publications

References 8 publications

Technological developments as an answer to bridge management challenges

Technological developments as an answer to bridge management challenges

Elements of Pathway for Quick and Reliable Health Monitoring of Concrete Behavior in Cable Post-Tensioned Concrete Girders

Detecting of the Longitudinal Grouting Quality in Prestressed Curved Tendon Duct Using Piezoceramic Transducers

Contact Info

Product

Resources

About