Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Proof-of-Concept: Sprayable SHCC Overlay Reinforcement Regime for Unreinforced 3D Printed Concrete Structure
Rebar penetration is the most common vertical reinforcement strategy for unreinforced 3D printed concrete (U3DPC) structures to improve the axial, flexural and shear capacities, and interlayer bond behaviour. Despite the reasonable simplicity of the application either by a manual or automated system, the method may disturb the fresh material during insertion which may cause plastic yield or elastic buckling failure, in particular with ribbed rebars, and generally has a deficiency in bond behaviour with non-ribbed rebar.
Sprayable strain-hardening cementitious composite (S-SHCC) overlay retrofit- ting has been extensively studied for shear and ductility enhancement of unreinforced masonry (URM) walls by several researchers. Depending on the overlay thickness and failure mode, the shear capacity can be increased by up to 465%. Due to the layer-by-layer construction nature of 3DPC, the similarity in structural behaviour of the U3DPC and URM is evident despite the apparent difference in interlayer bond strengths of the construction methodologies. Thus, the S-SHCC overlay retrofitting reinforcement regime may be applied to U3DPC structures to increase the mechanical resistance to applied loads.
This paper introduces the reinforcement method, and presents experimental results of enhanced in-plane and out-of-plane flexural behaviour of 3DPC elements reinforced with thin, bonded SHCC layers.
Proof-of-Concept: Sprayable SHCC Overlay Reinforcement Regime for Unreinforced 3D Printed Concrete Structure
Rebar penetration is the most common vertical reinforcement strategy for unreinforced 3D printed concrete (U3DPC) structures to improve the axial, flexural and shear capacities, and interlayer bond behaviour. Despite the reasonable simplicity of the application either by a manual or automated system, the method may disturb the fresh material during insertion which may cause plastic yield or elastic buckling failure, in particular with ribbed rebars, and generally has a deficiency in bond behaviour with non-ribbed rebar.
Sprayable strain-hardening cementitious composite (S-SHCC) overlay retrofit- ting has been extensively studied for shear and ductility enhancement of unreinforced masonry (URM) walls by several researchers. Depending on the overlay thickness and failure mode, the shear capacity can be increased by up to 465%. Due to the layer-by-layer construction nature of 3DPC, the similarity in structural behaviour of the U3DPC and URM is evident despite the apparent difference in interlayer bond strengths of the construction methodologies. Thus, the S-SHCC overlay retrofitting reinforcement regime may be applied to U3DPC structures to increase the mechanical resistance to applied loads.
This paper introduces the reinforcement method, and presents experimental results of enhanced in-plane and out-of-plane flexural behaviour of 3DPC elements reinforced with thin, bonded SHCC layers.
Proof-of-Concept: Sprayable SHCC Overlay Reinforcement Regime for Unreinforced 3D Printed Concrete Structure
RILEM Bookseries
Buswell, Richard (Herausgeber:in) / Blanco, Ana (Herausgeber:in) / Cavalaro, Sergio (Herausgeber:in) / Kinnell, Peter (Herausgeber:in) / Cho, Seung (Autor:in) / van den Heever, Marchant (Autor:in) / Kruger, Jacques (Autor:in) / van Zijl, Gideon (Autor:in)
RILEM International Conference on Concrete and Digital Fabrication ; 2022 ; Loughborough, United Kingdom
Third RILEM International Conference on Concrete and Digital Fabrication ; Kapitel: 63 ; 424-429
RILEM Bookseries ; 37
25.06.2022
6 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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