Results 31 to 40 of about 64,286 (293)

Damage detection in beams from modal and wavelet analysis using a stationary roving mass and noise estimation [PDF]

, 2018
This paper uses the Continuous Wavelet Transform Analysis on mode shapes for damage identification. The wavelet analysis is applied to the difference in the mode shapes between a healthy and a damaged state.
Andreaus, Bendat, Cao, Fan, García, Gentile, Jiang, Katunin, Katunin, Katunin, Katunin, Limongelli, Mallat, Montanari, Ovanesova, Panopoulou, Rajendran, Ren, Rucka, Rucka, Shao, Solís, Solís, Strang, Taha, Ulriksen, Unger, Xu, Xu, Yang, Yi, Zhong, Zhong, Zhong   +33 more
core   +1 more source

Damage detection of simply supported reinforced concrete beam by S transform

IOP Conference Series: Earth and Environmental Science, 2017
Signal processing is the key component of vibration-based structural damage detection. The S transform is variable window of short time Fourier transform (STFT) or an extension of wavelet transform (WT). The goal of using S transform is to extract subtle changes in the vibration signals in order to detect and quantify the damage in the structure.
Ning Liu, Jiaxin Xi, Xuebing Zhang, Zhenzhou Liu   +3 more
openaire   +1 more source

Beam-Induced Damage Mechanisms and their Calculation [PDF]

, 2016
The rapid interaction of highly energetic particle beams with matter induces dynamic responses in the impacted component. If the beam pulse is sufficiently intense, extreme conditions can be reached, such as very high pressures, changes of material ...
Bertarelli, A.
core   +3 more sources

Damage identification in a concrete beam using curvature difference ratio [PDF]

, 2011
Previous studies utilising changes in mode shape or curvature to locate damage rely on the fact that the greatest change occurs around the defect. However, in concrete beams this fact is undermined due to the nature of the defect as distributed multi ...
, Ali A Al-Ghalib, Bayissa W, Farrar C, Fouad A Mohammad, John Chilton, Mujib Rahman, Owen J, Salawu O S, Stubbs N, Zhang Z   +10 more
core   +1 more source

Damage Detection and Assessment of Stiffness and Mass Matrices in Curved Simply Supported Beam Using Genetic Algorithm

Journal of Engineering, 2023
In this study, a genetic algorithm (GA) is used to detect damage in curved beam model, stiffness as well as mass matrices of the curved beam elements is formulated using Hamilton's principle. Each node of the curved beam element possesses seven degrees of freedom including the warping degree of freedom. The curved beam element had been derived based on
Nabil Hassan Hadi, Aveen A. Abdulkareem
openaire   +2 more sources

EVALUATION OF SPECIFIC METHODS TO DETECT CRACK AND DAMAGE OF MECHANICAL BEAM STRUCTURES USING FREE VIBRATION ANALYSIS

Journal of Engineering
The importance of the beam in the service of our life and how the damaged beam costly influence the economy and even endanger the human life itself, draws our attention to study the specific methods to detect crack and damage by using free vibration ...
Nabil H. H., Iqbal A. R.
doaj   +1 more source

Repair of reinforced concrete beams using carbon fiber reinforced polymer

MATEC Web of Conferences, 2017
This research paper is part of an ongoing research on the behaviour of Reinforced Concrete (RC) beams retrofitted with Externally Bonded Carbon Fiber Reinforced Polymer (EB-CFRP).
Karzad Abdul Saboor, Al Toubat Salah, Maalej Mohammed, Estephane Pierre   +3 more
doaj   +1 more source

Solution to the problem of bridge structure damage identification by a response surface method and an imperialist competitive algorithm

Scientific Reports, 2022
To increase the efficiency of structural damage identification (SDI) methods and timeously and accurately detect initial structural damage, this research develops an SDI method based on a response surface method (RSM) and an imperialist competitive ...
Dan Ye, Zhe Xu, Yangqing Liu
doaj   +1 more source

The Influence of a Damaged Concrete Cover on the Behavior of a Simply-Supported Beam

Civil Engineering Journal, 2023
The concrete cover is a part of the concrete that provides the required protection for the reinforcing steel within the required element from external effects. This concrete cover can be damaged for an assortment of reasons, one of which is environmental factors.
Khalid K. Shadhan, Bilal Ismaeel Abd Al-Zahra, Muhammad Jawad Kadhim   +2 more
openaire   +1 more source

Seismic response of CRTS II ballastless track-bridge system considering the damage of track structure

Science Progress, 2021
Based on the 16–32 m simply-supported beam bridge on Shanghai-Kunming high-speed railway, a collision model of CRTS II track system was established.
Bin Yan, Zhe Li, Shi Liu, Hao-Ran Xie
doaj   +1 more source