Modal identification of concrete arch dam by fully automated operational modal identification

Structures ◽  
2021 ◽  
Vol 32 ◽  
pp. 228-236
Author(s):  
Hasan Mostafaei ◽  
Mehdi Ghamami ◽  
Pegah Aghabozorgi
Keyword(s):  
Arch Dam ◽  
Modal Identification ◽  
Concrete Arch Dam

scholarly journals Determining the Optimal Placement of Sensors on a Concrete Arch Dam Using a Quantum Genetic Algorithm

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Kai Zhu ◽  
Chongshi Gu ◽  
Jianchun Qiu ◽  
Wanxin Liu ◽  
Chunhui Fang ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Sensor Network ◽  
Complex Structure ◽  
Arch Dam ◽  
Modal Identification ◽  
Optimal Placement ◽  
Engineering Structures ◽  
Modal Strain Energy ◽  
Quantum Genetic Algorithm ◽  
Concrete Arch Dam

Structural modal identification has become increasingly important in health monitoring, fault diagnosis, vibration control, and dynamic analysis of engineering structures in recent years. Based on an analysis of traditional optimization algorithms, this paper proposes a novel sensor optimization criterion that combines the effective independence (EFI) method with the modal strain energy (MSE) method. Considering the complex structure and enormous degrees of freedom (DOFs) of modern concrete arch dam, a quantum genetic algorithm (QGA) is used to optimize the corresponding sensor network on the upstream surface of a dam. Finally, this study uses a specific concrete arch dam as an example and determines the optimal sensor placement using the proposed method. By comparing the results with the traditional optimization methods, the proposed method is shown to maximize the spatial intersection angle among the modal vectors of sensor network and can effectively resist ambient perturbations, which will make the identified modal parameters more precise.

Vibration-based damage detection of a concrete arch dam

2021 ◽  
Vol 235 ◽  
pp. 112032
Author(s):  
Sérgio Pereira ◽  
Filipe Magalhães ◽  
Jorge P. Gomes ◽  
Álvaro Cunha ◽  
José V. Lemos
Keyword(s):  
Damage Detection ◽  
Arch Dam ◽  
Concrete Arch Dam

scholarly journals A study on deformational behavior of concrete arch dam due to solar heat in a day.

1990 ◽  
pp. 229-237
Author(s):  
Hirotomo YOSHIDA ◽  
Tadaaki TANABE ◽  
Hidetaka UMEHARA ◽  
Takumi UEHARA
Keyword(s):  
Arch Dam ◽  
Solar Heat ◽  
Concrete Arch Dam ◽  
Deformational Behavior

The Diagnostic Method of Concrete Dam Monitoring Information Valid Interval

2012 ◽  
Vol 226-228 ◽  
pp. 2072-2077
Author(s):  
Dong Qin ◽  
Xue Qin Zheng ◽  
Fa Meng Wang ◽  
He Zhi Liu
Keyword(s):  
Influential Factors ◽  
Arch Dam ◽  
Dynamical Structure ◽  
Concrete Dam ◽  
Concrete Arch Dam ◽  
Structural Mutation ◽  
Mutation Theory ◽  
Dam Monitoring ◽  
Mutation Sequence ◽  
Monitoring Information

On the basis of the analysis of the displacement of concrete dam and its related influential factors, based on the evolvement of nonlinear dynamics of concrete dam, it can effectively identify the mutations position of measured value and the attribute interval of dynamical system applied with the wavelet analysis, dynamic structural mutation theory and other numerical analysis methods. When detecting after separating structural mutation sequence, it can finally get the relative stable displacement time series of dynamical structure, so it can realize the diagnostic separation of the monitoring information effective interval. At the end of the paper, through applying a certain concrete arch dam, it is proved that the proposed method of concrete dam mutations diagnosis of is of great significance for the real-time monitoring of the workability state of a dam.

scholarly journals Investigation of repeatability of digital surface model obtained from point clouds in a concrete arch dam for monitoring of deformations

2013 ◽  
Vol 19 (2) ◽  
pp. 268-286 ◽  
Author(s):  
Kutalmis Gumus ◽  
Halil Erkaya ◽  
Metin Soycan
Keyword(s):  
Water Reservoir ◽  
Point Clouds ◽  
Deformation Monitoring ◽  
Water Levels ◽  
Arch Dam ◽  
Surface Model ◽  
Engineering Structures ◽  
Concrete Arch Dam ◽  
Accuracy Of Measurements ◽  
Laser Scanners

Applicability of Terrestrial Laser Scanners/Scanning (TLS) in deformation measurement in dams is an active area of study. With the advance of modern technology, accuracy of measurements is much improved by developments in design of terrestrial laser scanners. Currently, this technology is used in large and complex engineering structures such as dams. Although TLS is a high cost technology, it is particularly used in monitoring of dam deformations, due to its speed in obtaining thousands of data points, ability to visualize the scanned object and its environment with high accuracy and ability to take long-range measurements. In order to determine the effect of change in water reservoir levels on body of the dam, TLS are used to take deformation measurements in different time intervals, where the water level was at maximum, minimum and medium levels. This paper provides an overview of terrestrial laser scanning technology for deformation monitoring. The concrete arch dam in Antalya Oymapinar, Turkey was used for case study. Four different scannings were performed in this dam in order to verify the replicability of TLS results on same water levels and equivalent conditions. Digital Surface Models reflecting dam surface have been created. Results obtained from surface model differences were examined using surface matching method.

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