Homam Spartali | Bond behavior between high-strength concrete and steel reinforcement under...

high cycle fatigue push-in loading

Abstract: In the last decades, an increasing demand for renewable energy has been stimulating the development of more fatigue resistant wind turbines that can be exposed to millions of load cycles. Bond degradation caused by this high number of load cycles needs to be examined to guarantee the durability and safety of these structures. In this paper, experimental investigations of the bond behavior between high-strength concrete and steel reinforcement under monotonic and high-cycle
fatigue loading are presented. In contrast to the pull-out test prevailing in literature, here a push-in compressive loading is applied. Therefore, a modified beam-end test specimen is used. Bond length, concrete strength as well as bar diameter are varied in the presented test program that consisted of 44 beam-end test specimens. The bond strength obtained from the push-in tests for bond length 2.5ds is comparable with the pull-out bond strength values. The results provide the basis for a detailed analysis of the effect of the splitting cracks on the growth of slip in the fatigue tests. Push-through and combined push-through × splitting failure modes have been observed in the experimental program.

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Join us for the 13th edition of the fib International PhD Symposium in Civil Engineering. Since its conception in 1996, this PhD Symposium has evolved into a highly respected scientific meeting, connecting young researchers and high-profile scientists alike.

This event provides an excellent opportunity for PhD students to share scientific thoughts and findings with the international research community from all over the world in the following fields: innovation in materials and structures, construction technology, structural analysis and design, durability and life assessment, sustainability and life cycle assessment and monitoring and strutural assessment.

In response to the current circumstances, the Organising Committee of the PhD Symposium in Paris has decided in accordance with the fib to hold an online PhD Symposium on 26-28 August 2020 and an in-person Symposium on 21-23 July 2021 in Paris, France.

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