Pretensioned prestressed superposed frame beam and construction method

Abstract

The invention provides a pretensioned prestressed superposed frame beam and a construction method, and relates to the technical field of construction engineering. A superposed beam component includesa reinforcing cage, steel strands, anti-seismic casing pipes and precast concrete, the reinforcing cage is composed of stirrups and beam longitudinal rebar, the prestressed steel strands are located on the lower part of the superposed beam, arranged in the longitudinal direction of the superposed beam and be pretensioned and fixed through special equipment, and concrete poured by a factory can bereleased from the fixing equipment after reaching a certain strength; and the anti- seismic casing pipes are located on the prestressed steel strands and have a certain distance from the beam end of asuperposed beam, and the pouring range of the precast concrete is located in the lower middle part of the superposed beam. After the superposed beam component is hoisted on site in place, the steel strands on the lower part of the superposed beam and the extension parts of the longitudinal rebar form an effective connecting joint with frame columns by pouring the concrete on site. According to the scheme, the economic property is high, the quality is good, the site formwork amount is greatly reduced, the construction efficiency is improved, construction of the connecting joint is convenient,the performance of the structure is equivalent to that of cast-in-place concrete structure.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a pretensioned prestressed laminated frame beam and a construction method thereof. Background technique [0002] The prefabricated concrete frame structure can effectively save resources and energy, and can improve the efficiency of materials in building energy saving and structural performance, reduce construction waste and adverse impact on the environment, and meet the requirements of building industrialization, housing industrialization and green buildings. In the prefabricated structure, the prefabricated concrete frame structure can be applied to large space buildings such as office buildings, schools, hospitals, etc., and is the most widely used structural form in construction engineering. [0003] At present, the superimposed frame beam members have many ribs and are difficult to install on site; the large-span superimposed frame beam members are too heav...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a pre-tensioned prestressed laminated frame beam and its construction method to solve the difficulty in field installation of laminated frame beam members with multiple ribs in the prior art; to avoid large-span laminated frame beam members Overweight, technical problems of difficult hoisting

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