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:
The suspension bridge has more flexibility and repetitive vehicles produce stress cyclesin members. Then fatigue of the member is accumulated with the daily traffic loadings. In order toevaluate the working condition of the Tsing Ma Bridge, the online monitoring health system hasbeen installed in long suspension bridge. The location of the strain sensor is not exactly at thecritical member locations. The hot spot stress analysis for critical members is necessary for accuratefatigue evaluation of the bridge. The global finite element analysis of the Tsing Ma Bridge undertraffic loading is performed to determine the critical fatigue member locations. A detailed localfinite element analysis for the welded connections is performed to determine the hot spot stress ofcritical fatigue location. As a case for study, the calculated stress concentration factor is combinedwith the nominal representative stress block cycle to obtain the representative hot spot stress rangecycle block under traffic loading from online health monitoring system. The comparison resultshows that the nominal stress approach cannot consider the most critical stress of the fatiguedamage location and the hot spot stress approach is more appropriate for fatigue evaluation
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.925.pdf
