Paper Title:
Dynamic Monitoring Systems for Structures under Extreme Loads
  Abstract

The dynamic monitoring of civil structures such as buildings and bridges is traditionally approached using acceleration and velocity sensors. When a monitoring program is designed to address concerns related to the level of strain in certain members, fatigue or displacements due to extreme loads, it is sometimes advantageous to measure those parameters directly, instead of deriving them from acceleration or velocity data. Inhomogeneous construction materials such as concrete, stone or masonry require the use of long-gauge sensors to measure strain, since local sensors can provide erroneous data due to local material changes. On the other hand, acceleration and tilt sensors are very useful to capture the global deformations and displacements. The development of long-gauge-length fiber optic sensors can be considered as a useful addition to the toolkit of those interested in the structural dynamics. The system can monitor structures over long periods of time at acquisition frequencies up to 10 kHz and with sub-microstrain resolution. The possibility of obtaining static and dynamic measurements from the same sensor is another advantage of this technology. For acceleration and tilt monitoring, MEMS sensors are now recognized as a powerful and low-cost alternative to more traditional sensor types. Fully-integrated sensors with 3-axis accelerometers and two-axis tiltmeters are now available in a compact packaging that also contain all data acquisition electronics and can be easily deployed in new or existing structures, connecting them directly to an Ethernet network. This contribution briefly introduces fiber optic and MEMS sensing technologies and will than illustrate their application to structural health monitoring through several examples, including the new I35W bridge in Minneapolis USA, the Ile d’Orléans suspension Bridge in Québec Canada and the shaking-table test of a full-scale masonry building reinforced with composite materials.

  Info
Periodical
Chapter
Chapter 4: Structural Management, Protection and Other Related Topics
Edited by
Ezio Cadoni and Marco di Prisco
Pages
804-809
DOI
10.4028/www.scientific.net/AMM.82.804
Citation
D. Inaudi, P. Favez, R. Belli, D. Posenato, "Dynamic Monitoring Systems for Structures under Extreme Loads", Applied Mechanics and Materials, Vol. 82, pp. 804-809, 2011
Online since
July 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Qi Lin Zhang, Da Lin Li
Abstract:Increasingly large and complex structures make it more complicated in analysis, designing and construction, and through the amplification...
2824
Authors: Kai Quan Xia, Xue Wu Liu, Yun Liu
Chapter 4: Structural Engineering
Abstract:In order to study the dynamic response of power transmission lines under mechanical fault, the structural dynamic response monitoring indexes...
986
Authors: Jun Fu, Yu Qin, Xu Hong Yu, Yan Chen, Xue Ting Shi
Chapter 3: Civil Engineering
Abstract:GuiYang Hongfenghu bridge health monitoring system was designed in this paper. The strain of girder was monitored by FBG sensors and cable...
1247
Authors: Xiang Cheng, Zhan Hui Liu, Wei Cheng Gao
Chapter 4: Monitoring and Control of Structures
Abstract:The wireless sensor network is a highly active area of research. Much progress has been made in wireless sensor network research for...
1123
Authors: Yi Lin Guo, Yan Xin
Chapter 10: Modern Technology in Construction
Abstract:With the application of Global Positioning System (GPS) echnology using in the field of modern transport, more and more long-span bridges...
2053