Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/38585
Title: Temperature effect on variation of structural frequencies : from laboratory testing to field monitoring
Authors: Xia, Y 
Weng, S
Xu, J-Z
Xu, YL 
Issue Date: 2011
Source: Proceedings of the 6th International Workshop on Advanced Smart Materials and Smart Structures Technology, ANCRiSST 2011, Dalian, China, 25-26 July 2011 (CD-ROM) How to cite?
Abstract: Although many experimental and field studies have observed the importance of the varying temperature in structural vibration properties and the associated damage detection and condition assessment, there are some different conclusions for different structures. It also lacks a quantitative explanation on the temperature effect. This paper aims to investigate the temperature effect on structural frequencies through comparative laboratory and field studies. Two models, a steel beam and a reinforced concrete (RC) slab, were constructed and tested outside laboratory. The relation of frequencies to temperature of the models is established. It is found that the RC slab is more sensitive to ambient temperature than the steel beam in terms of frequency changes. The 1377-m long Tsing Ma Bridge is then investigated. The first a few measured frequencies of the global structure in different seasons are obtained from the online structural health monitoring system. Quantitative results show that variation in the frequencies of the structures is mainly caused by the change in material modulus of the structures under different temperature conditions.
URI: http://hdl.handle.net/10397/38585
Appears in Collections:Conference Paper

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