Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bond behavior between high-strength concrete and steel reinforcement under high cycle fatigue push-in loading
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.
Bond behavior between high-strength concrete and steel reinforcement under high cycle fatigue push-in loading
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.
Bond behavior between high-strength concrete and steel reinforcement under high cycle fatigue push-in loading
Homam Spartali (Autor:in) / Abedulgader Baktheer (Autor:in) / Benjamin Camps (Autor:in) / Josef Hegger (Autor:in) / Rostislav Chudoba (Autor:in)
28.08.2020
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
DDC:
690
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