Tubular, hollow and steel bar reinforced concrete floor member

Abstract

A reinforced concrete tubular hollow floor slab includes beam between wall and column, cast-in-situ RC longitudinal rib, cast-in-situ RC upper flange, cast-in-situ RC lower flange and hotlow tube; the hollow tube is arrnaged alternate with each other between cast-in-situ RC longitudinal ribs or between beams between wall and column, cast-in-situ RC upper flange is at its top, cast-in-situ RC lower flange at its bollom, the hollow-tube has plugs at toth ends, and it is characterized by that the hollow tube is a composite one containing at least one stiffening rib and at least over two seetions of hollow tubes which are butt-jointed for connection at stiffeing rit, and the stiffening rib is combined with cast-in-situ RC longitudinal rib to constitute two-way hidden dense rib structure.

Description

(1) Technical field [0001] The invention relates to a reinforced concrete tubular hollow floor slab. (2) Background technology [0002] At present, in the prior art, the hollow tube components are generally paper tubes, plastic tubes, metal bellows or hollow hard thin-walled components. These hollow tube components are mainly considered to evacuate the concrete to reduce the weight of the floor slab. The existing reinforced concrete tubular hollow floor slabs include beams between wall columns, cast-in-place reinforced concrete longitudinal ribs, cast-in-place reinforced concrete upper flanges, cast-in-situ reinforced concrete lower flanges, and hollow tubes. Between longitudinal ribs or beams between wall columns, above it is the cast-in-place reinforced concrete upper wing, below it is the cast-in-place reinforced concrete lower wing, and there are plugs at both ends of the hollow tube, and the cross-sectional shape of the hollow tube member can be circular , square or ot...

AI Technical Summary

Problems solved by technology

Since the concrete in the slab is evacuated by the hollow tube member, there are longitudinal ribs of cast-in-place reinforced concrete longitudinally along the outer side of the tube, while there are no force-transmitting members in the transverse direction, or only two ribs to prevent the entry of wet concrete or cement slurry. Sealing and plugging make the existing hollow floor slab unable to bear complex tension, pressure, shear force, punching force, torque, etc. in the horizontal direction, so that the rigidity of the cast-in-place reinforced concrete tubular hollow floor slab is greatly different in two directions, and it is impossible to form a well. Two-way reinforced concrete tubular hollow floor slab equivalent to word rib

Compared with the double-ribbed slab floor, this kind of hollow slab has a large thickness of the hollow slab, large consumption of reinforced concrete, heavy weight, large deflection and deformation, poor shear and torsion resistance, and cast-in-place concrete on the upper and lower flanges of the hollow tube. The weak points are prone to cracks, poor seismic performance, large difference in two-way rigidity, easy damage to pipes, large leakage of cast-in-place concrete, and high cost

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