Connecting node of prefabricated reinforced concrete beam and construction method of connecting node

Abstract

The invention relates to a connecting node of a prefabricated reinforced concrete beam and a construction method of the connecting node. The connecting node consists of an upper raised beam section, a lower raised beam section, steel plates, a toothed steel plate, a perforated steel plate, high-strength bolts and expanded mortar, wherein the steel plates are welded under upper longitudinal ribs on the beam, the toothed steel plate is welded at lower longitudinal ribs of the lower raised beam section, the perforated steel plate is welded on lower longitudinal ribs of the upper raised beam section, the high-strength bolts are arranged in bolt holes of the perforated steel plate, the upper raised beam section is buckled on the lower raised beam section, the upper longitudinal ribs and the steel plates of the two beam sections are connected by butt welds, the lower toothed steel plate and the perforated steel plate are connected by the high-strength bolts, and gaps are sealed by the expanded mortar. The construction method comprises the following steps: machining an embedded part first, manufacturing prefabricated beam sections, buckling the upper raised beam section on the lower raised beam section, manually welding the upper longitudinal ribs of the two beam sections, connecting the lower toothed steel plate and the perforated steel plate by the bolts, and sealing the gaps in the upper part and the lower part of the connecting node by the expanded mortar. The connecting node disclosed by the invention is simple in structure, reliable in force transfer and convenient to construct and can meet the requirements of a perforated structure on a beam connecting node.

Description

technical field [0001] The invention relates to the field of connection nodes between two sections of prefabricated reinforced concrete beams. Background technique [0002] At present, according to the construction method, reinforced concrete structures can be divided into three types: cast-in-place structures, fabricated structures and assembled integral structures. The cast-in-place structure has good integrity, high rigidity, and good impermeability, but the cast-in-place structure needs to erect formwork, bind steel bars and pour concrete on site, so the site labor is heavy and the construction period is long, and the mechanical properties of the structure are affected by the site construction quality larger. The prefabricated structure is installed and connected on site by prefabricated components, which saves on-site labor, shortens the construction period, and facilitates industrialized and mechanized production. However, the integrity and rigidity of the assembled s...

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