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Fatigue Failure Characteristics of Steel Reinforced Concrete Girders
With the rapid development of the express railways in China, a large number of express railway station buildings have been constructed in recent years. Steel reinforced concrete (SRC) girders are used in many buildings for express railway stations. It is a new subject for fatigue behavior of SRC girders under daily train loading. This subject is discussed preliminarily in the current paper. Fatigue tests on three SRC girders were carried out in Tongji University. The test specimens, testing program as well as experimental results are presented. The fatigue failure characteristics of the SRC girders are described in detail and compared with the static failure characteristics. It was found that the fatigue cracking was initiated at the weld toe of shear studs on the tension flange of welded H-section steel inside the SRC girder and then the crack propagated along the flange width and the web height until the girder lost loading capacity due to lack of enough cross section. The fatigue strength of the welded H-section steel played a key role in the fatigue strength of SRC girders. Suggestions for improving the fatigue strength of SRC girders and future research work are proposed finally.
Fatigue Failure Characteristics of Steel Reinforced Concrete Girders
With the rapid development of the express railways in China, a large number of express railway station buildings have been constructed in recent years. Steel reinforced concrete (SRC) girders are used in many buildings for express railway stations. It is a new subject for fatigue behavior of SRC girders under daily train loading. This subject is discussed preliminarily in the current paper. Fatigue tests on three SRC girders were carried out in Tongji University. The test specimens, testing program as well as experimental results are presented. The fatigue failure characteristics of the SRC girders are described in detail and compared with the static failure characteristics. It was found that the fatigue cracking was initiated at the weld toe of shear studs on the tension flange of welded H-section steel inside the SRC girder and then the crack propagated along the flange width and the web height until the girder lost loading capacity due to lack of enough cross section. The fatigue strength of the welded H-section steel played a key role in the fatigue strength of SRC girders. Suggestions for improving the fatigue strength of SRC girders and future research work are proposed finally.
Fatigue Failure Characteristics of Steel Reinforced Concrete Girders
Liu, Bo (author) / Tong, Lewei (author) / Zhao, Xiao-Ling (author)
2014
6 Seiten, 15 Quellen
Conference paper
English
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