Abstract
The results of an experimental and analytical study on the static and fatigue behavior in steel‐concrete composite beams under the hogging moment were presented in this paper, and the structural deformation was discussed cautiously and emphatically. Firstly, the static and fatigue tests on three inverted simply supported beams were conducted. The development of cracks under static loading, the load‐deformation curves, and the values of residual deformation under fatigue load were recorded and analyzed in detail. Several meaningful conclusions were obtained from the analysis of experimental results. To study the development laws of residual deformation under fatigue load, the analytical methods of residual midspan deflection and residual rebar strain were proposed, respectively. The limitation and accuracy of the presented models were studied according to the comparison between the prediction and measured results. The calculation values of the proposed models showed good agreement with the test results. Finally, the design recommendations of fatigue deformation were proposed according to the experimental and analytical study on steel‐concrete composite beams subjected to hogging moment.
Highlights
In recent years, steel-concrete composite structure was popularly used in varied bridges and public buildings due to the many advantages of concrete and steel [1]
28.7 29.2 upper limit under the monotonic loading as listed in Table 4, and this proportion will be larger with the increment of repeated cycles. erefore, to avoid the unsafe results, the residual deflection caused by fatigue load should be noted
Suggestion for Fatigue Deformation Design. e residual deflection and strain gradually increased due to the fatigue loading, as observed and analyzed in the experimental test. e residual deflection accounted for more than 30% of the static deflection caused by the fatigue upper limit under the monotonic loading with the increment of repeated cycles
Summary
Steel-concrete composite structure was popularly used in varied bridges and public buildings due to the many advantages of concrete and steel [1]. Because of the existence of unfavorable factors such as tension in concrete slabs and compression in steel beams, the hogging moment region of steel-concrete continuous composite beams presents complex nonlinear behavior even under a low static load level. En, it is necessary to study the mechanical properties, the development rules of cracks, and the calculation methods of structural deformation and crack width in the hogging moment region of composite beams under static and fatigue loads intensively based on scaled model test, theoretical analysis, and numerical simulation [2,3,4]. Ryu et al [5] performed experimental tests on the mechanical behavior of the composite plate beam with prefabricated concrete slabs under hogging moments
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
