scholarly journals Crane Metal Structure Crack Monitoring Method

2018 ◽  
Vol 394 ◽  
pp. 032062 ◽  
Author(s):  
Feng Xue ◽  
Zhouli Xu ◽  
Feixiang Weng
Keyword(s):  
Metal Structure ◽  
Monitoring Method ◽  
Crack Monitoring ◽  
Structure Crack

scholarly journals Preparation and Application of Film Sensor for Metal Structure Crack Monitoring

2015 ◽  
Vol 21 (4) ◽  
Author(s):  
Bo HOU ◽  
Yuting HE ◽  
Ronghong CUI ◽  
Teng ZHANG
Keyword(s):  
Metal Structure ◽  
Film Sensor ◽  
Crack Monitoring ◽  
Structure Crack

scholarly journals Crack monitoring method based on Cu coating sensor and electrical potential technique for metal structure

2015 ◽  
Vol 28 (3) ◽  
pp. 932-938 ◽  
Author(s):  
Bo Hou ◽  
Yuting He ◽  
Ronghong Cui ◽  
Chao Gao ◽  
Teng Zhang
Keyword(s):  
Electrical Potential ◽  
Metal Structure ◽  
Monitoring Method ◽  
Crack Monitoring

A Novel Fatigue Crack Monitoring Method Based on Nonlinear Dynamic Characteristics of Strain

2019 ◽  
Vol 20 (01) ◽  
pp. 2050016
Author(s):  
Dong Yang ◽  
Dan Li ◽  
K. S. C. Kuang
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Crack Propagation ◽  
Real Time ◽  
Nonlinear Dynamic ◽  
Crack Opening ◽  
Steel Structures ◽  
Monitoring Method ◽  
Strain Measurements ◽  
Crack Monitoring

This paper presents a novel fatigue crack monitoring method for steel specimens based on the smoothness priors method (SPM) and Tsallis entropy (TE) of strain measurements. The aim of the study is to detect initiation of a crack in steel specimens and subsequently to monitor its propagation under the fatigue load, based on real-time strain measurements. The nonlinear dynamic response of the structure was exploited since it degrades due to the initiation and subsequent propagation of the crack under the external dynamic excitation. The proposed method was experimentally validated. Here, the SPM is applied to decomposing the structural strain response into a nearly-stationary (NS) component and a low frequency aperiodic trend (LFAT) component. Features associated with crack initiation can be extracted from the NS component. The LFAT component, on the other hand, can be used to identify crack propagation. To tackle the singularity of the structural responses associated with a crack, the TE of the NS component was used in detection and monitoring of the crack in the steel specimen. Two other techniques, namely, acoustic emission (AE) sensor and crack opening displacement (COD) gauge were used for the purpose of calibration and comparison. The results show remarkable resemblance in terms of crack initiation and propagation identification exhibited by all three types of sensors, highlighting the potential of the proposed method for real-time detection and subsequent monitoring of crack propagation in steel structures.

scholarly journals Crack Monitoring Method for an FRP-Strengthened Steel Structure Based on an Antenna Sensor

Sensors ◽  
2017 ◽  
Vol 17 (10) ◽  
pp. 2394 ◽  
Author(s):  
Zhiping Liu ◽  
Kai Chen ◽  
Zongchen Li ◽  
Xiaoli Jiang
Keyword(s):  
Steel Structure ◽  
Monitoring Method ◽  
Crack Monitoring

A Novel Design for Crack Width Monitoring of Concrete Structures

2011 ◽  
Vol 80-81 ◽  
pp. 571-574
Author(s):  
Ben Niu Zhang ◽  
Xing Xing Li ◽  
Zhi Xiang Zhou
Keyword(s):  
Crack Initiation ◽  
Health Monitoring ◽  
Crack Width ◽  
Concrete Structures ◽  
Challenging Problem ◽  
Crack Initiation And Propagation ◽  
Monitoring Method ◽  
Initiation And Propagation ◽  
Crack Monitoring ◽  
Novel Design

Crack monitoring is thought to be a challenging problem for structural health monitoring. In previous study, a bionic crack monitoring method is proposed to monitor the crack initiation and propagation in a structure, and smart film is designed and fabricated. A novel design, based on smart film for monitoring crack width of concrete structures, is proposed in this paper. Experiment verifies the effectiveness of this design, and proves it is a good way for crack width monitoring of concrete structures.

scholarly journals Online Bridge Crack Monitoring with Smart Film

2013 ◽  
Vol 2013 ◽  
pp. 1-14 ◽  
Author(s):  
Benniu Zhang ◽  
Shuliang Wang ◽  
Xingxing Li ◽  
Zhixiang Zhou ◽  
Xu Zhang ◽  
...  
Keyword(s):  
Crack Initiation ◽  
Monitoring System ◽  
Remote Monitoring ◽  
Communication Protocol ◽  
Low Frequency ◽  
Normal Strain ◽  
Monitoring Method ◽  
Crack Monitoring ◽  
Length Width ◽  
Mechanical Sensing

Smart film crack monitoring method, which can be used for detecting initiation, length, width, shape, location, and propagation of cracks on real bridges, is proposed. Firstly, the fabrication of the smart film is developed. Then the feasibility of the method is analyzed and verified by the mechanical sensing character of the smart film under the two conditions of normal strain and crack initiation. Meanwhile, the coupling interference between parallel enameled wires of the smart film is discussed, and then low-frequency detecting signal and the custom communication protocol are used to decrease interference. On this basis, crack monitoring system with smart film is designed, where the collected crack data is sent to the remote monitoring center and the cracks are simulated and recurred. Finally, the monitoring system is applied to six bridges, and the effects are discussed.

Research on Analysis and Repairing for Metal Structure Cracks of Portal Crane

2012 ◽  
Vol 443-444 ◽  
pp. 970-973
Author(s):  
Xiao Ping Wang ◽  
Han Bin Xiao
Keyword(s):  
Metal Structure ◽  
Monitoring Methods ◽  
Load Bearing ◽  
Repair Method ◽  
Actual Operating ◽  
The Common ◽  
Structure Crack ◽  
Portal Crane

Crack in the port crane which is prevalent in the metal structure of crane is a serious threat to the safety use of crane, therefore, it is very important to study on the production and repair of the cracks. This article takes the actual operating portal crane as an example to study on the crack locations and monitoring methods for metal structure of port crane, with the analysis for the reason of crane load bearing structure’s cracks ,this paper gives the common repair method for metal structure crack for cranes on this basis.

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