Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2013 Dec 16;13(12):17346-61.
doi: 10.3390/s131217346.

A practical monitoring system for the structural safety of mega-trusses using wireless vibrating wire strain gauges

Hyo Seon Park, Hwan Young Lee, Se Woon Choi, Yousok Kim  1
Affiliations

A practical monitoring system for the structural safety of mega-trusses using wireless vibrating wire strain gauges

Hyo Seon Park et al. Sensors (Basel). .

Abstract

Sensor technologies have been actively employed in structural health monitoring (SHM) to evaluate structural safety. To provide stable and real-time monitoring, a practical wireless sensor network system (WSNS) based on vibrating wire strain gauges (VWSGs) is proposed and applied to a building under construction. In this WSNS, the data measured from each VWSG are transmitted to the sensor node via a signal line and then transmitted to the master node through a short-range wireless communication module (operating on the Industrial, Scientific, and Medical (ISM) band). The master node also employs a long-range wireless communication module (Code Division Multiple Access-CDMA) to transmit the received data from the sensor node to a server located in a remote area, which enables a manager to examine the measured data in real time without any time or location restrictions. In this study, a total of 48 VWSGs, 14 sensor nodes, and seven master nodes were implemented to measure long-term strain variations of mega-trusses in an irregular large-scale building under construction. Based on strain data collected over a 16-month period, a quantitative evaluation of the construction process was performed to determine the aspects that exhibit the greatest influence on member behavior and to conduct a comparison with numerical simulation results. The effect of temperature stress on the structural elements was also analyzed. From these observations, the feasibility of a long-term WSNS based on VWSGs to evaluate the structural safety of an irregular building under construction was confirmed.

PubMed Disclaimer

Figures

Figure 1.
Figure 1.
WSNS.
Figure 2.
Figure 2.
VWSG.
Figure 3.
Figure 3.
Wireless nodes. (a) Sensor node; (b) Master node.
Figure 4.
Figure 4.
Structural frames.
Figure 5.
Figure 5.
WSNS for the D-Building.
Figure 6.
Figure 6.
Application site during construction. (a) Mega-truss (A6 and A7 areas) during construction; (b) VWSG and sensor node of zone A3 in the D-Building.
Figure 7.
Figure 7.
Removal schedule of temporary bents.
Figure 8.
Figure 8.
Construction events and strain of A6-01.
Figure 9.
Figure 9.
Structural safety during construction events.
Figure 10.
Figure 10.
Stress changes before and after bent removal. (a) Zone A; (b) Zone B.
Figure 11.
Figure 11.
Relationship between temperature and strain (A6-01).
Figure 12.
Figure 12.
Change in thermal coefficient (R) of A6-01.
See this image and copyright information in PMC

References

    1. Doherty J.E. Nondsestructive Evaluation. In: Kobayashi A.S., editor. Handbook on Experimental Mechanics. 2nd ed. Society for Experimental Mechanics, Inc.; Bethel, CT, USA: 1987.
    1. Arditi D., Gunaydin H.M. Total quality management in the construction process. Int. J. Proj. Manage. 1997;15:235–243.
    1. Aktan A.E., Catbas F.N., Grimmelsman K.A., Tsikos C.J. Issues in infrastructure health monitoring for management. J. Eng. Mech. Asce. 2000;126:711–724.
    1. Brownjohn J.M.W. Structural health monitoring of civil infrastructure. Philos. T. R. Soc. A. 2007;365:589–622. - PubMed
    1. Liu S.C., Tomizuka M. Vision and Strategy for Sensors and Smart Structures Technology Research. Proceedings of the 4th International Workshop on Structural Health Monitoring; Stanford, CA, USA. 15–17 September 2003; Lancaster, PA, USA: DEStech Publication, Inc.; 2003.

Publication types

LinkOut - more resources