Hybrid psc girder having reverse t-shaped cross section and method for constructing slab using same

Abstract

One aspect of the present invention presents a hybrid PSC girder having a reverse T-shaped cross section, the girder comprising: a lower flange; a web which is vertically formed upward from the widthwise central part of the lower flange and includes, at an upper part, a plurality of coupling holes formed therethrough or formed in a predetermined depth at an uniform interval in the longitudinal direction; a central body part having a reverse T-shaped cross section, which comprises reinforcing partition walls protruding from both sides of the web in a predetermined thickness to resist out-of-plane deformation; end partition walls formed at both lengthwise ends of the central body part in a predetermined length and having a box-type cross section; and reinforcing beams made of steel, having apredetermined length, and coupled in the lengthwise direction to opposite side surfaces of the upper part of the web between the reinforcing partition walls and the end partition walls by using coupling fasteners inserted into the coupling holes.

Description

technical field [0001] The invention relates to a hybrid prestressed concrete beam with an inverted T-shaped section, and a panel construction method using the prestressed concrete beam and a wide semi-prefabricated concrete panel for on-site pouring to introduce prestress into the prestressed concrete beam with an inverted T-shaped section. When stressing concrete beams, prevent the out-of-plane deformation of the upper side of the web, and effectively resist the lateral deformation or impact caused by the self-weight acting on the inverted T-shaped section during lifting. When the operator moves and places the precast concrete floor slab or formwork panels, to ensure safety. Background technique [0002] In general, a beam whose upper flange width and web thickness are the same at the center is located below the center line of the center. Therefore, when the fixture is arranged so that the resultant force of tension is located at the center of gravity at the end of the bea...

AI Technical Summary

Problems solved by technology

At this time, although reinforcing ribs are provided along the span direction, that is, longitudinally, the strength of the transverse direction perpendicular to the span is relatively reduced, and cracks occur in parallel with the span direction during construction, thereby limiting the strength of the precast concrete panel. Wide or additional lifting auxiliary devices are required, resulting in increased production costs and reduced economic efficiency

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