Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bond behavior between reinforcement and ultra-high toughness cementitious composite in flexural members
Highlights Both short and slender beams with bonding in shear-span zone were considered in this test. Splitting-pullout failure mode of reinforcement was presented for all the UHTCC beams. Bond strength for slender beams was larger than that for short beams. A bond strength model was proposed considering parameters of c/d, l/d and a/h e.
Abstract Bonding between reinforcement and ultra-high toughness cementitious composite (UHTCC) is of great significance for reinforced UHTCC members. In this study, bond tests were carried out on short and slender UHTCC beams to simulate bond conditions in flexural members. The experimental results indicated that, differently from the brittle failure seen in concrete specimens, a ductile pull-out failure of reinforcement was obtained for all the UHTCC specimens. The descending branches of the bond-slip curves were correlated with the shear-span ratios and cover-depth to rebar-diameter ratios of specimens. The effect of shear-span ratios on bond strength for UHTCC beams was far less than that for concrete beams. Slender UHTCC beams had greater bond strength than short beams. Based on test data from different types of specimens in this study and previous studies, the effect of cover-depth to rebar-diameter ratios, bond-length to rebar-diameter ratios, and bond test methods was analyzed, and a bond strength model was proposed which includes the effect of these parameters.
Bond behavior between reinforcement and ultra-high toughness cementitious composite in flexural members
Highlights Both short and slender beams with bonding in shear-span zone were considered in this test. Splitting-pullout failure mode of reinforcement was presented for all the UHTCC beams. Bond strength for slender beams was larger than that for short beams. A bond strength model was proposed considering parameters of c/d, l/d and a/h e.
Abstract Bonding between reinforcement and ultra-high toughness cementitious composite (UHTCC) is of great significance for reinforced UHTCC members. In this study, bond tests were carried out on short and slender UHTCC beams to simulate bond conditions in flexural members. The experimental results indicated that, differently from the brittle failure seen in concrete specimens, a ductile pull-out failure of reinforcement was obtained for all the UHTCC specimens. The descending branches of the bond-slip curves were correlated with the shear-span ratios and cover-depth to rebar-diameter ratios of specimens. The effect of shear-span ratios on bond strength for UHTCC beams was far less than that for concrete beams. Slender UHTCC beams had greater bond strength than short beams. Based on test data from different types of specimens in this study and previous studies, the effect of cover-depth to rebar-diameter ratios, bond-length to rebar-diameter ratios, and bond test methods was analyzed, and a bond strength model was proposed which includes the effect of these parameters.
Bond behavior between reinforcement and ultra-high toughness cementitious composite in flexural members
Hou, Lijun (Autor:in) / Xu, Ran (Autor:in) / Zang, Yingping (Autor:in) / Ouyang, Feng (Autor:in) / Chen, Da (Autor:in) / Zhong, Lin (Autor:in)
Engineering Structures ; 210
06.02.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Bond , UHTCC , Reinforcement , Short beams , Slender beams , Strength model
| British Library Online Contents | 2019