ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Fatigue life assessment of critical bridge members using online monitoring data has beeninvestigated in recent years. To make a quick and efficient evaluation, a representative block of straincycles is usually defined. However, such block sometimes fails to cover the change in fatigue damageby temperature fluctuation and traffic growth, which is important to the life prediction of the welds ina long-span suspension bridge. To find the influence of temperature and traffic volume on the fatiguedamage, an equivalent vehicle load method is dedicated through finite element analysis, and thestatistical disposition of traffic flow has been conducted, using data from the Runyang Bridge. Theinfluence of traffic growth can be estimated and eliminated from the total damage so that thetemperature effect on the fatigue damage is finally obtained. It is found that temperature has a lineareffect on the fatigue damage. According to the fitted relationship between fatigue damage,temperature and the traffic flow, a more objective fatigue assessment is undertaken, based on therain-flow counting method and the Palgren-Miner rule
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.341.pdf
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