Next Article in Journal
The Application of a Piezo-Resistive Cardiorespiratory Sensor System in an Automobile Safety Belt
Previous Article in Journal
A Robust Method to Detect Zero Velocity for Improved 3D Personal Navigation Using Inertial Sensors
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(4), 7728-7741; doi:10.3390/s150407728

Maximum Stress Estimation Model for Multi-Span Waler Beams with Deflections at the Supports Using Average Strains

1
Center for Structural Health Care Technology in Buildings, Yonsei University, Seoul 120-749, Korea
2
Department of Architectural Engineering, Yonsei University, Seoul 120-749, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M.N. Passaro
Received: 28 January 2015 / Revised: 19 March 2015 / Accepted: 20 March 2015 / Published: 30 March 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [1754 KB, uploaded 17 April 2015]   |  

Abstract

The safety of a multi-span waler beam subjected simultaneously to a distributed load and deflections at its supports can be secured by limiting the maximum stress of the beam to a specific value to prevent the beam from reaching a limit state for failure or collapse. Despite the fact that the vast majority of accidents on construction sites occur at waler beams in retaining wall systems, no safety monitoring model that can consider deflections at the supports of the beam is available. In this paper, a maximum stress estimation model for a waler beam based on average strains measured from vibrating wire strain gauges (VWSGs), the most frequently used sensors in construction field, is presented. The model is derived by defining the relationship between the maximum stress and the average strains measured from VWSGs. In addition to the maximum stress, support reactions, deflections at supports, and the magnitudes of distributed loads for the beam structure can be identified by the estimation model using the average strains. Using simulation tests on two multi-span beams, the performance of the model is evaluated by estimating maximum stress, deflections at supports, support reactions, and the magnitudes of distributed loads. View Full-Text
Keywords: average strain; vibrating wire strain gauge; maximum stress; structural health monitoring average strain; vibrating wire strain gauge; maximum stress; structural health monitoring
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Park, S.W.; Oh, B.K.; Park, H.S. Maximum Stress Estimation Model for Multi-Span Waler Beams with Deflections at the Supports Using Average Strains. Sensors 2015, 15, 7728-7741.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top