کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
285001 509176 2013 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fatigue tests on straight steel–concrete composite beams subjected to hogging moment
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Fatigue tests on straight steel–concrete composite beams subjected to hogging moment
چکیده انگلیسی

This paper describes the fatigue behavior of composite steel and concrete beams subjected to negative bending moment. Fatigue tests with repeated load limited to initial cracking and stabilized cracking, were performed on two steel–concrete composite beam substructures respectively. Test results indicated that when the repeated load was equivalent to the initial cracking load, the fatigue test had only limited influence on beam stiffness or crack patterns. However, when the repeated load was equivalent to the stabilized cracking load, a number of residual cracks occurred in the initial static test and the beam became less stiff as the load cycles increase. Failure of the bond between studs and surrounding concrete was confirmed in intermediate static tests; flexural stiffness of studs became smaller as the increase of load cycles. In addition, final static tests were performed on fatigue test specimens and another specimen without fatigue test. The comparison indicated that when the repeated load was larger than the initial cracking load, fatigue test could decrease beam stiffness and its ultimate load carrying capacity.


► Fatigue of composite beams subjected to hogging moment is studied.
► Effects of low load level fatigue test on final static behavior are studied.
► Initial cracking fatigue has limited effect on beam stiffness and crack pattern.
► Stabilized cracking fatigue decreases both beam rigidity and loading capacity.
► Bond effect and bond failure on steel-concrete interface was learned.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Constructional Steel Research - Volume 80, January 2013, Pages 42–56
نویسندگان
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