Flexural Behavior and Design of Ultrahigh-Performance Concrete Beams
نویسندگان
چکیده
Beams made of ultrahigh-performance concrete (UHPC), a fiber-reinforced with high compressive strength and tensile strain-hardening characteristics, exhibit flexural behaviors that are different than those traditionally associated steel-reinforced conventional beams. These necessitate the development new predictive design tools reflect effect material-level properties on behavior. The research presented in this paper assessed behavior UHPC beams through displacement-controlled testing prestressed bridge girder to failure. was 18.90 m (62 ft) long contained total 26 17.8-mm- (0.7-in.)-diameter steel strands no mild reinforcement. focused capturing intermediate final behaviors, including first cracking, yielding strands, moment capacity at single dominant crack, rupture strands. Building observations from study prior by authors others, framework, founded concepts equilibrium strain compatibility, is proposed for reinforced reinforcing bars, prestressing or both. framework includes considerations avoid local straining subsequent hinging address ductility members. verified comparing experimental results tests performed others analytical predictions, which predominantly relied input material parameters obtained independent tests.
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ژورنال
عنوان ژورنال: Journal of Structural Engineering-asce
سال: 2022
ISSN: ['0733-9445', '1943-541X']
DOI: https://doi.org/10.1061/(asce)st.1943-541x.0003246