An end-reinforced steel-reinforced concrete composite beam

Abstract

The invention provides an end-enhanced steel-reinforced concrete superposed beam, which belongs to the field of architectural structures. A prefabricated shape steel frame is composed of tip shape steel connecting pieces, end H shape steel and a steel bar and steel reinforcement cage system, wherein shape steel frame end steel reinforcement cages are arranged between the tip shape steel connecting pieces and the top surfaces of the end H shape steel, a full-beam-length shape steel frame lower steel reinforcement cage is arranged between the tip shape steel connecting pieces located at two ends, a shape steel frame middle steel reinforcement cage is arranged between the inner ends of the end H shape steel located at two ends, concrete is poured along the shape steel frame lower steel reinforcement cage to form a prefabricated concrete steel-reinforced lower beam, and a concrete steel-reinforced upper beam is poured on the prefabricated lower beam along shape steel frame end and middle steel reinforcement cages, thereby forming the superposed beam. According to the invention, based on the loading characteristics of beam ends and the middle parts of the beam, the end H shape steel and steel-reinforced steel reinforcement cages at different parts are arranged to fully reinforce joints and improve bearing capability, and materials are saved and cost is reduced on the premise that structure safety is guaranteed.

Description

technical field [0001] The invention relates to an end-reinforced steel-reinforced concrete composite beam, which belongs to the field of building structures. Background technique [0002] At present, beam structures in the field of construction can be divided into three types: cast-in-place reinforced concrete beams, steel beams, and steel concrete beams. Cast-in-place reinforced concrete beams are widely used in the industry and the technology is mature, but they require a large number of formwork, high construction costs, long periods, and many wet operations; steel beams have good seismic performance and large bearing capacity, but high cost, torsional performance, durability and Poor fire resistance; steel reinforced concrete beams combine the advantages of reinforced concrete beams and steel beams with high strength, large bearing capacity, and fire protection. At present, the steel frame structures of steel reinforced concrete beams are different. The demand for bone...

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Problems solved by technology

Cast-in-place reinforced concrete beams are widely used in the industry and the technology is mature, but they require a large number of formwork, high construction costs, long periods, and many wet operations; steel beams have good seismic performance and large bearing capacity, but high cost, torsional performance, durability and Poor fire resistance; steel reinforced concrete beams combine the advantages of reinforced concrete beams and steel beams with high strength, large bearing capacity, and fire prevention. At present, the steel frame structures of steel reinforced concrete beams are different. The demand for bone steel is large and the cost is high. Therefore, in order to meet the needs of different building structures, it is necessary to develop various steel concrete beams that meet different needs.

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