Static and dynamic field load testing of the long span Nissibi cable-stayed bridge

Bayraktar, Alemdar; Türker, Temel; Tadla, Janusz; Kurşun, Altok; Erdiş, Arif

doi:10.1016/j.soildyn.2017.01.019

Cited by 41 publications

(23 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…xðt s þ iDtÞ (15) This CPD method shown in equations (11)- (14) can also be used for further decomposition of an IMF distorted by nonlinearities by assuming…”

Section: Conjugate-pair Decompositionmentioning

confidence: 99%

“…Based on preliminary results obtained by the authors in literatures, [2][3][4]15,22 we derive a conjugate-pair decomposition (CPD) method that can accurately track a signal's frequency by processing only three (or more) recent data points, and P-Box theory was employed to obtain the uncertain probability distribution of IF in this paper. In Instantaneous frequency analysis of tensioned cable section, the IF of Guanhe Bridge cable was calculated based on CPD method, to evaluate the accuracy of CPD, Hilbert-Huang transform (HHT) is used to extract the time-varying frequency of bridge cable, and the uncertain probability distribution of Guanhe Bridge cable was discussed, the P-box of IF also can be obtained, it will be useful to evaluate safety and potential fatigue problems in the cables.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An instantaneous frequency analysis method of stay cables

Zhong

Pai

2019

Journal of Low Frequency Noise, Vibration and Active Control

View full text Add to dashboard Cite

This paper presents and evaluates in detail a conjugate-pair decomposition method for tracking the instantaneous frequency of a vibration signal by processing only three (or more) most recent data points, and Probability Box theory was employed to obtain the uncertain probability distribution of instantaneous frequency. A composite cablestayed bridge with large span, named as Guanhe Bridge, was selected as the engineering background; the proposed conjugate-pair decomposition method is verified and compared with Hilbert-Huang transform method using the measured dynamical data of structural health monitoring system. Moreover, the uncertain probability distribution of instantaneous frequency was discussed; the Probability Box also can be obtained. Results show that the identify results are close to each other using conjugate-pair decomposition and Hilbert-Huang transform, respectively; but the variance of conjugate-pair decomposition is less than Hilbert-Huang transform, and conjugate-pair decomposition requires only a few data points for sliding-window fitting to extract the instantaneous frequency, and the Probability Box of instantaneous frequency will be useful to evaluate safety and potential fatigue problems in the bridge cables.

show abstract

“…xðt s þ iDtÞ (15) This CPD method shown in equations (11)- (14) can also be used for further decomposition of an IMF distorted by nonlinearities by assuming…”

Section: Conjugate-pair Decompositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An instantaneous frequency analysis method of stay cables

Zhong

Pai

2019

Journal of Low Frequency Noise, Vibration and Active Control

View full text Add to dashboard Cite

show abstract

“…Through [Correction added on 26 October 2020, after first online publication: An incorrectly duplicated surname in one of the authors' names was corrected after publication] analyzing the collected data, basic dynamic properties of studied structure can be identified, such as natural frequencies, damping ratios, and arbitrarily scaled modal shapes which are important indicators for evaluating dynamic performance of a bridge. [5][6][7][8] Natural frequencies are often used to assess structural global stiffness; if the measured fundamental frequency is smaller than theoretical value, actual stiffness of the bridge cannot meet the expectation, indicating some cracks or other-type structural damage (i.e., concrete spalling and exposed rebar). For identified modal shapes, they are widely utilized for locating the presence of structural damages; various modal shape-based damage indicators have been proposed, such as the difference of modal shape and modal shape curvature.…”

Section: Introductionmentioning

confidence: 99%

Time‐varying frequency‐based scaled flexibility identification of a posttensioned concrete bridge through vehicle–bridge interaction analysis

Tian

Wang

Zhang

2020

Struct Control Health Monit

View full text Add to dashboard Cite

Dynamic testing methods have been widely used in engineering practice for investigating dynamic properties of bridges; however, only basic dynamic parameters (i.e., natural frequencies, damping ratios, and unscaled modal shapes) can be identified, which are insufficient for condition assessment and health monitoring. To address this limitation, this article takes a three-span posttensioned concrete bridge as testbed; more useful structural parameters including mass-normalized mode shapes and scaled flexibility matrix are intended to be identified from moving vehicle-induced responses. For identifying scaled flexibility matrix, structural scaling factor between arbitrarily scaled mode shapes and mass-normalized mode shapes needs to be calculated firstly. In this article, time-varying frequencies of vehicle-bridge interaction (VBI) system were adopted for structural scaling factor identification, and the sensitivity of parameters identification error on calculated scaling factor was also investigated. The effectiveness of the proposed method was verified by in situ measurements of the studied three-span concrete bridge. In field testing, static load test and classical impact vibration testing were performed on this bridge for verifying the correctness of the proposed method. The good agreement between predicted deflections by using the scaled flexibility and reference values illustrates the reliability of the proposed method.

show abstract

“…The following publication provide both guidelines for using load tests to evaluate bridges as well as provide numerous applications (Pinjarkar et al, 1990;Fu and Tang, 1992;Moses et al, 1994;Lichtenstein, 1995;Nowak and Saraf, 1996;Chajes et al, 1997Chajes et al, , 1999Chajes et al, , 2000Fu et al, 1997;NCHRP, 1998;The Institution of Civil Engineers, 1998;AASHTO, 2003;Chajes and Shenton, 2006;Schiff et al, 2006;Jeffrey et al, 2009;Hosteng and Phares, 2013;Olaszek et al, 2014;Peiris and Harik, 2016;Al-Khateeb et al, 2018). Most recently, Bayraktar et al (2017), has employed static and dynamic field testing on a cablestayed bridge.…”

Section: Introductionmentioning

confidence: 99%

Structural Health Monitoring of a Cable-Stayed Bridge Using Regularly Conducted Diagnostic Load Tests

Al-Khateeb

Shenton

Chajes

et al. 2019

Front. Built Environ.

View full text Add to dashboard Cite

The management and maintenance of cable-stayed bridges represents a major investment of human and financial capital. One possible approach to reducing the cost while simultaneously improving the process is by utilizing structural health monitoring (SHM) systems to enable diagnostic load tests to be regularly and efficiently conducted. The Indian River Inlet Bridge (IRIB), a 533-m long cable stayed bridge, was opened for traffic in 2012. From the very early stages of the design process, the Center for Innovative Bridge Engineering (CIBrE) at the University of Delaware (UD) worked with the Delaware Department of Transportation (DelDOT) and their design-build team of Skanska and AECOM to plan and install a comprehensive structural health monitoring (SHM) system. The SHM system is a fiber-optic based design with more than 120 sensors of varying type distributed throughout the bridge. The system, which not only collects data continuously during normal operation, has also been utilized during regularly scheduled controlled diagnostic load tests being used to monitor ongoing bridge performance. This paper presents results from a unique series of six diagnostic load tests which have been performed over the first 6 years of the bridge's service life (just prior to the bridge's opening, and then again at 6 months, 1, 2, 4, and 6 years). The results of this extended set of diagnostic load tests have enabled the bridge's baseline performance to be rigorously established. This in turn has provided the opportunity to develop a process for conducting future biennial tests to and adding their results to an evolving database, thereby enhancing DelDOT's ability to operate and maintain the bridge.

show abstract

Static and dynamic field load testing of the long span Nissibi cable-stayed bridge

Cited by 41 publications

References 10 publications

An instantaneous frequency analysis method of stay cables

An instantaneous frequency analysis method of stay cables

Time‐varying frequency‐based scaled flexibility identification of a posttensioned concrete bridge through vehicle–bridge interaction analysis

Structural Health Monitoring of a Cable-Stayed Bridge Using Regularly Conducted Diagnostic Load Tests

Contact Info

Product

Resources

About