Longitudinal shear reinforcement and precast slab separated laminated slab composite beam

Abstract

The invention relates to a longitudinal shear reinforcement and precast slab separated laminated slab composite beam, and belongs to the technical field of building structures. The longitudinal shearreinforcement and precast slab separated laminated slab composite beam comprises a concrete precast slab with a platform formed at the end, an additional reinforcement mesh unit and an upper concretepost-cast layer; no reinforcement stretches out of the slab end of the concrete precast slab with the platform formed at the end, meanwhile a step-shaped platform with the certain width is reserved atthe top of the precast slab, and the reinforcement mesh unit which is constituted by longitudinal and transverse reinforcements which are bundled is placed in the platform; and the transverse reinforcements play a longitudinal shear resistance role in the composite beam, the reinforcements in the beam length direction are parallelly placed in the step-shaped platform, and the positioning fixing effect is achieved. In the composite beam, traditional precast slab horizontal reinforcing bars are omitted, and through the modes that the step-shaped platform is formed at the slab end, and the reinforcement mesh unit is embedded, the longitudinal shear resistance problem of the composite beam and the longitudinal shear resistance reinforcement positioning problem are solved; and the longitudinalshear reinforcement and precast slab separated laminated slab composite beam is definite in force transmitting, convenient to construct, and suitable for laminated slab composite beam systems in thefields such as building engineering and bridge engineering.

Description

technical field [0001] The invention relates to a laminated slab composite beam separated from a prefabricated slab and longitudinal shear reinforcement, and belongs to the technical field of building structures. Background technique [0002] In structural systems such as prefabricated composite floors and composite beam bridges, composite beam systems have been widely used. In composite beams, longitudinal shear reinforcement is essential to prevent splitting damage. [0003] In the composite beam of the cast-in-place concrete flange, the transverse reinforcement of the concrete slab doubles as the longitudinal shear reinforcement of the composite beam. Because it is an on-site operation, the position of the horizontal reinforcement can be fine-tuned at any time according to the actual position of the stud when the reinforcement is bound. To avoid conflicts between studs and transverse reinforcement. [0004] In composite beams with composite slab concrete flanges, the tr...

AI Technical Summary

Problems solved by technology

[0010] Aiming at the limitations and shortcomings of traditional concrete prefabricated slabs in the application of laminated slab composite beams, the present invention proposes a structural form of laminated slab composite beams in which longitudinal shear reinforcement and prefabricated slabs are separated, which can solve the inconvenience of traditional prefabricated slab transportation Easy to conflict, inconvenient fixing and positioning of additional steel bars, etc.

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