A New Insight to Vibration Characteristics of Spans under Random Moving Load: Case Study of 38 Bridges in Ho Chi Minh City, Vietnam
TLDR
The idea behind this method is to use the representative power spectrum density as a powerful tool to evaluate the stiffness decline of spans during their operation period and a new measurement method has been introduced to replace the traditional method of monitoring the health conditions of bridges through a periodic measurement technique.Abstract:
We propose a novel representative power spectrum density as a specific characteristic for showing responses of spans during a long operational period. The idea behind this method is to use the representative power spectrum density as a powerful tool to evaluate the stiffness decline of spans during their operation period. In addition, a new measurement method has been introduced to replace the traditional method of monitoring the health conditions of bridges through a periodic measurement technique. This helps to reduce costs when carrying out testing bridges. Besides, the proposed approach can be widely applied not only in Vietnam but also in many other underprivileged countries around the world. Obtained results show that, during the operational process of spans, there is not only a pure vibration evaluation such as bending vibration and torsion vibration tests but also a combination of various vibration types including bending-torsion vibration or high-level vibrations like first-mode bending and first-mode torsion. Depending on each type of structure and material properties, different types of vibrations will appear more or less during the operational process of spans under a random moving load. Furthermore, the representative power spectrum density is also suitable for evaluating and determining many different fundamental vibrations through the same measurement time as well as various measurement times.read more
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References
More filters
Journal ArticleDOI
A novel method for crack detection in beam-like structures by measurements of natural frequencies
Nguyen Tien Khiem,L.K. Toan +1 more
TL;DR: In this paper, an explicit expression of the natural frequencies through crack parameters is derived as a modification of the Rayleigh quotient for the multiple cracked beams that differ from the earlier ones by including nonlinear terms with respect to crack severity.
Journal ArticleDOI
Multi-crack detection for beam by the natural frequencies
Nguyen Tien Khiem,T.V. Lien +1 more
TL;DR: In this article, a multi-crack detection for beam by natural frequencies has been formulated in the form of a non-linear optimization problem, then solved by using the MATLAB functions.
Journal ArticleDOI
Fault identification of beams on elastic foundation
TL;DR: In this article, a methodology based on vibration theory is proposed for the detection of faults in a beam of either uniform or nonuniform cross section and under a variety of boundary conditions, including simple support, cantilever support, and beam on elastic foundation.
Journal ArticleDOI
Solar-powered multi-scale sensor node on Imote2 platform for hybrid SHM in cable-stayed bridge
Duc-Duy Ho,Po-Young Lee,Khac Duy Nguyen,Dong-Soo Hong,So-Young Lee,Jeong-Tae Kim,Sung-Woo Shin,Chung Bang Yun,Masanobu Shinozuka +8 more
TL;DR: In this paper, solar-powered, multi-scale, vibration-impedance sensor node on Imote2 platform is presented for hybrid structural health monitoring (SHM) in cable-stayed bridge and the feasibility and practicality of the smart sensor-based SHM system is evaluated.
Journal ArticleDOI
Damage Detection of a Continuous Bridge from Response of a Moving Vehicle
Z. H. Li,F. T. K. Au +1 more
TL;DR: In this article, a multistage multipass method was proposed to identify the damage location of a continuous bridge from the response of a vehicle moving on the rough road surface of the bridge.
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