scholarly journals Mathematical Modelling Of The Bridges Structural Monitoring I

2015 ◽  
Vol 5 (1) ◽  
pp. 83-90
Author(s):  
G.M.T. Rădulescu ◽  
A.T.G. Rădulescu ◽  
M.V.G. Rădulescu ◽  
Sanda Naş
Keyword(s):  
Mathematical Modelling ◽  
Mathematical Models ◽  
Health Monitoring ◽  
Static Condition ◽  
Structural Monitoring ◽  
Monitoring Systems ◽  
Structural Element ◽  
Steel Temperature ◽  
Or Manager

Abstract Structural Health Monitoring is an extremely complex and relatively expensive activity, and the current offer of tools, methods and technologies is varied, which can lead to a virtually high number of structural monitoring systems that can be customized for each case. In time, the monitoring of bridges became the engine for the development of SHM tools, methods and technologies, or manager monitoring systems. The case study, in continuous quasi-static condition, was performed on Incheon Grand Bridge South Korea. Tracking the behaviour of an objective under the influence of sunshine is performed by VCE Vienna Consulting Engineers ZT GmbH. This paper presents the effect of sunshine on a steel structural element, the first lamella front North line, by comparing data pairs that reflect the cause: steel temperature and the effect: the movement of a sensor mounted on the structural element. The analysis was performed using several software dedicated to mathematical modelling, trying to establish different mathematical models that can be tested and validated.

scholarly journals Perception about the use of monitoring systems in civil construction structures

2018 ◽  
pp. 28-33
Author(s):  
Claudio Alcides Jacoski ◽  
Larissa Saugo
Keyword(s):  
Health Monitoring ◽  
Structural Monitoring ◽  
Monitoring Systems ◽  
Monitoring Method ◽  
Large Structures ◽  
Displacement Sensors ◽  
The Future ◽  
The Cost ◽  
Very High ◽  
New Strategies

In recent years, concrete structures have started to show increased amounts of degradation or damage. This phenomenon is generally caused by the growth of these constructions, particularly with regard to slenderness. In the quest for new strategies to address this problem and to ensure the safety of structures and their occupants, tools for damage detection and timely analysis distributed within buildings have been developed. These tools are referred to as “Structural Health Monitoring” sensors. It is known that these systems still have high costs, thus this study aims to assess their value through future projections of their costs and utility. This monitoring method, although not widespread, mainly aims to maintain the integrity of major projects; it is not currently focused in small sized works, with the exception of a few structures of historical interest. Therefore, this study proposes the analysis of structural monitoring systems in civil construction, through means of a survey and interviews with experts. The study is aimed at investigating current technologies, planning for implementation, and identifying costs and feasibility of structural monitoring in the future. In conclusion, it was possible to expose that deformation and displacement sensors, along with optical and electrical technologies are the most commonly used types of sensors. Furthermore, it was found that monitoring systems are only feasible for large structures and the estimated time for use in medium-sized buildings is 15 years or more. However, it can be noted that the cost is currently very high, but will likely be reduced in the future.

Health Monitoring of Medieval Masonry Towers by an Acoustic Emission Approach

2019 ◽  
Vol 817 ◽  
pp. 586-593
Author(s):  
Giuseppe Lacidogna ◽  
Gianni Niccolini ◽  
Alberto Carpinteri
Keyword(s):  
Acoustic Emission ◽  
Health Monitoring ◽  
Masonry Wall ◽  
Masonry Buildings ◽  
Earthquake Occurrence ◽  
Structural Element ◽  
Natural Time ◽  
Non Destructive

Non-destructive tests were performed to assess cracking evolution in two medieval masonry buildings, Sineo and Asinelli towers rising respectively in the Cities of Alba and Bologna, in Italy. As regards the case study of Alba, in situ compressive flat-jack tests on small-sized elements of the tower were conducted in conjunction with acoustic emission (AE) monitoring. At the same time, crack patterns taking place in large volumes of the tower were likewise monitored through the AE technique.As for the case study of Bologna, a masonry wall of the Asinelli tower was monitored during a period of intense seismic activity. The observed correlation between the AE activity in the monitored structural element and local earthquakes points out a significant dependence of deterioration processes in the tower on the action of nearby earthquakes.In both cases, the trends of two evolutionary parameters, the b-value and the natural time (NT) variance κ1, were derived from the AE time series to identify the approach of the monitored structures to a critical state in relation to the earthquake occurrence.

Structural health monitoring systems – benefits and airworthiness issues

2008 ◽  
Vol 112 (1131) ◽  
pp. 285-289 ◽  
Author(s):  
P. A. Lloyd
Keyword(s):  
Health Monitoring ◽  
Research Effort ◽  
Structural Monitoring ◽  
Monitoring Systems ◽  
Quantitative Estimates ◽  
Technical Issues ◽  
Health Monitoring Systems ◽  
Expected Benefits ◽  
Considerable Work ◽  
The Impact

Abstract In recent years there has been an increasing interest in the application of advanced structural monitoring systems to aircraft structures. A great deal of research effort has, and is being directed towards technologies that can detect damage and estimate its significance. In this paper the benefits of deploying such systems are discussed and illustrated with quantitative estimates where these are available. It is concluded that significant benefits should accrue from their use, but that a number of outstanding technical issues remain which include the realistic verification of performance and reliability. The impact on aircraft airworthiness is also considered and it is suggested that while no significant new issues emerge, considerable work will need to be done to qualify systems, and that this is unlikely to be worthwhile unless the expected benefits can be assured.

scholarly journals Review of Technologies for Automatic Health Monitoring of Structures and Buildings

2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Artem Basko ◽  
Olena Ponomarova ◽  
Yurii Prokopchuk
Keyword(s):  
Sensor Networks ◽  
Monitoring System ◽  
Health Monitoring ◽  
Network Architecture ◽  
Wireless Sensors ◽  
Automatic Monitoring ◽  
Structural Monitoring ◽  
Monitoring Systems ◽  
Comprehensive Overview ◽  
Main Components

Research in the field of structural monitoring of structures, buildings and structures is not abating. A key link in a modern wireless monitoring system is a sensor built using wireless technologies. Undoubtedly, wireless sensors are gradually replacing wired systems that are difficult to maintain, connect and costly. However, we should not forget about wired systems, wireless sensor networks are a new stage in the development of structural monitoring. The level of development of monitoring systems and wireless sensors for monitoring tasks has not yet been fully investigated for their universal application in various applications. There are also software restrictions associated with the creation and configuration of sensor networks. The importance of using automatic monitoring systems lies in their application in smart homes as monitoring system for the condition of a building and as a human security system. According to this study, it aims to provide a comprehensive overview of structural health monitoring over the years. In particular, this article reviewed and analyzed the main components of wireless communication, such as: hardware of smart wireless sensors, wireless protocol, network architecture, operating systems. This review also presents the scope of both test benches and real deployments of such systems.

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