Full-prefabricated concrete floor slab connecting structure and design calculation method

Abstract

The invention discloses a full-prefabricated concrete floor slab connecting structure and a design calculation method. The connecting structure comprises prefabricated concrete floor slabs (1) on the two sides, a rear steel bar frame (2), a rear penetrating longitudinal bar (3) and post-poured concrete (4); longitudinal through grooves (11) and a plurality of vertical through grooves (12) are formed in the side faces of the connecting sides of the prefabricated concrete floor slabs (1); the rear steel bar frame (2) is arranged in the vertical through grooves (12) of the floor slabs on the two sides in a centered mode; the rear penetrating longitudinal bar (3) is arranged in the rear steel bar frame (2) in a penetrating mode; and the post-poured concrete (4) is poured in the longitudinal through grooves (11) and the plurality of vertical through grooves (12). The in-slab shear resistance, flexural rigidity and bearing capacity of the full-prefabricated floor slabs can be remarkably improved, deformation coordination of slab joints during vertical load bearing is guaranteed, and the using performance similar to that of an overall cast-in-place floor system can be achieved. The full-prefabricated concrete floor slab connecting structure is reliable in performance, simple in structure, rapid in construction and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of building structure connection structures, in particular to a fully precast concrete floor connection structure and a design calculation method. Background technique [0002] As an important part of the overall building structure, the floor slab not only bears the vertical load, but also transmits the horizontal load generated by the earthquake and wind load to the lateral system. The traditional steel-cast-in-place concrete floor slab exhibits excellent mechanical properties, but a large number of workers are still required to perform on-site formwork making, steel bar binding and concrete pouring during the construction process, which has problems such as cumbersome construction, heavy workload, and low construction efficiency; In addition, with the shortage of labor force, the required labor cost has greatly increased; large-scale on-site wet operations cause environmental pollution, which is not in lin...

AI Technical Summary

Problems solved by technology

However, limited by the size of the floor slabs during transportation, there are inevitably joints between adjacent prefabricated floor slabs

The physical connection joints between fully precast floors affect the in-plane shear resistance, bending stiffness and bearing capacity of the floors, resulting in a significant decrease in the integrity of the floors; in addition, under the action of vertical loads, the deformation of the fully precast panels on both sides of the joints is uncoordinated, etc. problems, leading to damage to the decoration at the joints, affecting the comfort and aesthetics of use

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