Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Design and Behavior of UHPFRC Field-Cast Transverse Connections between Precast Bridge Deck Elements
AbstractThis research focuses on developing and measuring the mechanical behavior of ultrahigh-performance fiber-reinforced concrete (UHPFRC), transverse, field-cast connections between precast bridge deck elements. The connections had a closed shape, exposed aggregates, and lap splice length of 10 bar diameters (db). Three slab designs were considered: high-performance concrete (HPC), high- performance fiber-reinforced concrete (HPFRC), and hybrid HPFRC and UHPFRC. The first set of specimens was subjected to quasi-static loads up to failure, while the second set was subjected to cyclic fatigue loads prior to quasi-static loading to failure. Experimental results showed that all precast bridge decks with UHPFRC connections presented the same stiffness and ultimate strength as equivalent cast-in-place (CIP) slabs. Finite-elements models reproduced experimental results accurately and were used for predicting the mechanical behavior of continuous bridge slabs. Parametric studies demonstrated that, under various loading conditions, transverse UHPFRC field-cast connections do not modify the stiffness, ultimate strength, and failure mode of a slab differently than the equivalent CIP systems.
Design and Behavior of UHPFRC Field-Cast Transverse Connections between Precast Bridge Deck Elements
AbstractThis research focuses on developing and measuring the mechanical behavior of ultrahigh-performance fiber-reinforced concrete (UHPFRC), transverse, field-cast connections between precast bridge deck elements. The connections had a closed shape, exposed aggregates, and lap splice length of 10 bar diameters (db). Three slab designs were considered: high-performance concrete (HPC), high- performance fiber-reinforced concrete (HPFRC), and hybrid HPFRC and UHPFRC. The first set of specimens was subjected to quasi-static loads up to failure, while the second set was subjected to cyclic fatigue loads prior to quasi-static loading to failure. Experimental results showed that all precast bridge decks with UHPFRC connections presented the same stiffness and ultimate strength as equivalent cast-in-place (CIP) slabs. Finite-elements models reproduced experimental results accurately and were used for predicting the mechanical behavior of continuous bridge slabs. Parametric studies demonstrated that, under various loading conditions, transverse UHPFRC field-cast connections do not modify the stiffness, ultimate strength, and failure mode of a slab differently than the equivalent CIP systems.
Design and Behavior of UHPFRC Field-Cast Transverse Connections between Precast Bridge Deck Elements
Verger-Leboeuf, Sébastien (Autor:in) / Charron, Jean-Philippe / Massicotte, Bruno
2017
Aufsatz (Zeitschrift)
Englisch
BKL:
56.23
Brückenbau
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