Floor structure composed of cast-in-place concrete frame beams and concrete laminated floor slabs

Abstract

The invention relates to a floor structure composed of concrete frame beams and a concrete composite floor slab in a cast-in-situ mode. The floor structure comprises the concrete frame beams and the concrete composite floor slab; the bottom layer of the concrete composite floor slab is provided with a prefabricated layer, and the upper part of the concrete composite floor slab is provided with a concrete cast-in-situ layer; when the concrete frame beams and the concrete composite floor slab are connected, the composite floor slab prefabricated layer and the concrete frame beams are parted andseparated within the beam end 1.5-time frame beam height range, and within the parting and separating range, steel bars of the composite floor slab prefabricated layer do not stretch out of the slab edge and are connected with the concrete frame beams by arranging additional steel bars at interfaces of the composite floor slab prefabricated layer and the cast-in-situ layer; and when the concrete frame beams and the concrete composite floor slab are connected, the composite floor slab prefabricated layer and the concrete frame beams are placed in an overlapped mode within the range beyond the beam end 1.5-time beam height, and within the overlapped placing range, the steel bars of the composite floor slab prefabricated layer stretch into the concrete frame beams to be connected. The overallseismic performance of the building structure is improved, and the conceptual design requirement of 'strong column and weak beam' is met.

Description

technical field [0001] The invention belongs to the field of construction engineering, and in particular relates to a floor structure composed of cast-in-place concrete frame beams and concrete laminated floor slabs. Background technique [0002] Prefabricated buildings have the advantages of energy saving, environmental protection, high efficiency and high quality, and meet the requirements of building industrialization. Prefabricated buildings are booming everywhere; currently, prefabricated buildings are in the stage of blowout development. After project practice, we rationally thought and concluded that there are still many problems in existing prefabricated buildings: construction and transportation costs are higher than traditional building structures, vertical load-bearing and lateral force-resistant components (such as frame columns, shear walls) are mainly There are potential safety hazards and seismic defects in the connection of assembled nodes by grouting sleeves...

AI Technical Summary

Problems solved by technology

After project practice, we rationally thought and concluded that there are still many problems in existing prefabricated buildings: construction and transportation costs are higher than traditional building structures, vertical load-bearing and lateral force-resistant components (such as frame columns, shear walls) are mainly Assembled nodes are connected by grouting sleeves, etc., which have potential safety hazards and seismic defects, and the integrity is not as good as that of cast-in-place structures, and the seismic performance is poor.

As the main component of the prefabricated building, the laminated floor slab is thicker than the cast-in-place structural slab due to the construction structure and prefabrication rate, so that the frame beams connected to it have a super strong bearing capacity, and it is impossible to truly realize the building structure " Requirements for the seismic design concept of "strong column weak beam"

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