CN202831384U

CN202831384U - Double-prefabricated superposed frame beam

Info

Publication number: CN202831384U
Application number: CN 201220405433
Authority: CN
Inventors: 杨峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-16
Filing date: 2012-08-16
Publication date: 2013-03-27
Anticipated expiration: 2022-08-16

Abstract

A double-prefabricated superposed frame beam comprises two reverse T-shaped prestressing precast beam bodies and a T-shaped post-poured reinforced concrete part. The two reverse T-shaped prestressing precast beam bodies and the T-shaped post-poured reinforced concrete part form a superposed beam with a concave and convex superposed face. The double-prefabricated superposed frame beam is characterized in that the two reverse T-shaped prestressing precast beam bodies are vertically provided with prestressing steel strands in an inbuilt mode, a rectangular stirrup is arranged on a precast beam web plate in an inbuilt mode, the stirrup stretches out of the web plate upper surface to a certain length, and the upper portion of the superposed beam post-poured part concrete is vertically provided with a rebar in an inbuilt mode. Due to the fact that a beam with a longer width is divided into two beams prefabricated, the double-prefabricated superposed frame beam has the advantages that self weight of the precast beam is greatly reduced, hoisting is more convenient, and therefore the installing cost is reduced.

Description

A kind of two prefabricated laminated frame is set a roof beam in place

Technical field

The utility model relates to the beam in a kind of building, relates in particular to a kind of prestressed reinforced concrete superposed beam.

Background technology

The pre-erection of tradition steel bar concrete superposed beam generally adopts square-section or inverted T-shaped cross section, and when beam span was larger, prefabricated cross section was large, from great, lifting difficulty.Be used for highrise building and must configure the larger tower crane of elevating capacity, expense increases, in addition for high intensity Zone, the common beam-ends positive bending moment of Vierendeel girder is larger, pretensioned prestressing framework superposed beam beam-ends need arrange cracking resistance power consumption additional bar, to satisfy the antidetonation force request, make trouble but bury additional bar in the precast beam underground, difficulty is installed in the building site.A kind of after water two prefabricated tee girders of burying the additional square reinforcing bar of cracking resistance power consumption in the part concrete underground superposed beam have no report.

The utility model content

Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, provides a kind of convenience prefabricated installation, is beneficial to construction hoisting, and the two prefabricated laminated frame that anti-seismic performance is good, cost is low is set a roof beam in place.

Set a roof beam in place according to a kind of pair of precast beam laminated frame that the utility model provides, comprise the prestressing force precast beam body of two inverted T-shapeds and T shape after water the steel bar concrete part, the two composition has the superposed beam of concavo-convex superposed surfaces, described invertible T-shaped precast beam vertically is embedded with prestress wire, be embedded with rectangle hoop on the precast beam web, stirrup stretches out web upper surface certain-length, waters part concrete top behind the described superposed beam and vertically is embedded with reinforcing bar.

A kind of pair of precast beam laminated frame that provides according to the utility model set a roof beam in place and also had following attached technical characterictic:

Water the part concrete after described and only arrange in the beam end certain-length, beam middle part is only watered and is smash with plate with thick concrete, and the double joint soffit of girder sheet separation at middle part arranges the diaphragm perpendicular to web, the cavity filling with light material between the beam of middle part or in install permanent formwork.

Water the part concrete after described and be embedded with at least vertically additional cracking resistance reinforcing bar in the certain-length of beam-ends bottom, vertically additional cracking resistance reinforcing bar stretches in the bean column node, after water the part concrete and can be embedded with stirrup.

At least one curb girder web of described invertible T-shaped precast beam downside is embedded with pre-buried tie bar.

Certain distance is left in described two precast beam bottoms, the intermarginal filling concrete of lower flange of girder, or concrete is not filled at the beam middle part.

The web side of described precast beam superposed surfaces and edge of a wing upper surface are processed into crude.

Water part behind the described beam-ends and be embedded with bent-up bar, bent-up bar is zigzag, and two bent-up bar lower ends are connected and take the shape of the letter U.

A kind of pair of precast beam laminated frame that provides according to the utility model set a roof beam in place and compared with prior art had following advantage: at first: the utility model the larger beam of width be divided into two beam prefabricated, the precast beam deadweight is alleviated greatly, lift convenient, institute so that installation cost reduce.Secondly: can make hollowly because of middle part of the present utility model, therefore under the impregnable prerequisite of intensity, can make the superposed beam weight reduction, thereby structure stress is reduced.At last, because beam-ends antidetonation additional bar of the present utility model need not in precast beam pre-buriedly, and in rear pouring concrete, bury underground, so greatly facilitate construction, structural seismic performance is improved.In addition, the superposed surfaces concave-convex surface between prefabricated and Cast-in-place concrete, the concrete contact area strengthens, and the shear bond strength performance improves greatly, and the beam globality is strengthened.

Description of drawings

Fig. 1 is single precast beam stereogram of the present utility model

Fig. 2 is two combination precast beam stereograms of the present utility model

Fig. 3 is the arrangement of reinforcement elevation of superposed beam of the present utility model

Fig. 4 is a kind of combining form sectional drawing of the present utility model

Fig. 5 is another kind of combining form sectional drawing of the present utility model

Fig. 6 is the cavity superposed beam middle section figure that has of the present utility model

The specific embodiment

Referring to Fig. 1 to Fig. 6, in the embodiment that a kind of prefabricated laminated frame that the utility model provides is set a roof beam in place, comprise the prestressing force precast beam body 1 of two inverted T-shapeds and T shape after water part 2, the two composition has the superposed beam of concavo-convex superposed surfaces, described invertible T-shaped precast beam 1 vertically is embedded with prestress wire 11, be embedded with rectangle hoop 12 on the precast beam web, stirrup 12 stretches out web upper surface certain-length, water part concrete 2 tops behind the described superposed beam and vertically be embedded with reinforcing bar 21, two inverted T-beams are the deadweight that reduces the larger precast beam of deck-siding, make transporting and hoisting more convenient, longitudinal reinforcement 21 is buried on beam top after superimposed underground, make superposed beam become continuous beam, thereby reduce moment of flexure in the girder span.

Referring to Fig. 4, Fig. 5, Fig. 6, in the embodiment that the utility model provides, watering part concrete 2 after described only arranges in the beam end certain-length, the beam middle part is only watered and is smash with plate with thick concrete, the double joint soffit of girder sheet separation at middle part arranges the diaphragm 24 perpendicular to web, the cavity filling with light material between the beam of middle part or install the beam permanent formwork.Beam only is solid in the end, and cavity is established at the middle part, is under the prerequisite that does not affect beam strength, alleviates the superposed beam deadweight, save simultaneously concrete, and diaphragm is for improving beam at the stress performance that the cavity place is arranged.

Referring to Fig. 4, Fig. 5, in the embodiment that the utility model provides, water part concrete 2 after described and be embedded with vertically additional cracking resistance reinforcing bar 22 at the beam-ends certain-length at least, vertically additional cracking resistance reinforcing bar stretches in the bean column node, after water part concrete 2 and can be embedded with stirrup 23.After water part 2 beam end bury vertically additional cracking resistance reinforcing bar underground for making beam under geological process, the crack does not appear in beam-ends bottom in advance, and for improving " plastic hinge " energy dissipation capacity, and stirrup 23 is for making beam stress better, the raising overall performance.

Referring to Fig. 1, Fig. 2, in the embodiment that the utility model provides, at least one curb girder web of described invertible T-shaped precast beam downside is embedded with pre-buried tie bar 13, the tension rib 13 of invertible T-shaped precast beam is usually located at the position that beam-ends and span centre have diaphragm 24, it is mainly and makes two prefabricated beam bottoms that drawknot be arranged, and the superposed beam globality is improved.

Referring to Fig. 5, Fig. 6, in the embodiment that the utility model provides, certain distance is left in described two precast beam bottoms, the intermarginal filling concrete of lower flange of girder, or do not fill concrete in the middle part of the beam, and pull open certain distance between precast beam, make Liang Gengkuan, thereby improve the supporting capacity of beam, but the span centre part can be saved concrete and not affect supporting capacity.

Referring to Fig. 3, in the embodiment that the utility model provides, water part behind the described beam-ends and be embedded with bent-up bar 14, bent-up bar 14 is zigzag, and two bent-up bar lower ends are connected and take the shape of the letter U.Superimposed beam-ends is buried underground and is bent up muscle 14, for improving the anti-shear ability of superimposed beam-ends.

Claims

1. two prefabricated laminated frames are set a roof beam in place, comprise the prestressing force precast beam body of two inverted T-shapeds and T shape after water the steel bar concrete part, the two composition has the superposed beam of concavo-convex superposed surfaces, it is characterized in that: described invertible T-shaped precast beam vertically is embedded with prestress wire, be embedded with rectangle hoop on the precast beam web, stirrup stretches out web upper surface certain-length, waters part concrete top behind the described superposed beam and vertically is embedded with reinforcing bar.

2. composite frame beam as claimed in claim 1 is characterized in that watering the part concrete after described only arranges in the beam end certain-length, the beam middle part is only watered and is smash with plate with thick concrete, the double joint soffit of girder sheet separation at middle part arranges the diaphragm perpendicular to web, the cavity filling with light material between the beam of middle part or in install permanent formwork.

3. composite frame beam as claimed in claim 1 is characterized in that watering after described the part concrete be embedded with at least vertically additional cracking resistance reinforcing bar in the certain-length of beam-ends bottom, and vertically additional cracking resistance reinforcing bar stretches in the bean column node, after water the part concrete and can be embedded with stirrup.

4. composite frame beam as claimed in claim 1 is characterized in that at least one curb girder web of described invertible T-shaped precast beam downside is embedded with pre-buried tie bar.

5. composite frame beam as claimed in claim 1 is characterized in that described two precast beam bottoms leave certain distance, the intermarginal filling concrete of lower flange of girder, or concrete is not filled at the beam middle part.

6. composite frame beam as claimed in claim 1 is characterized in that the web side of described precast beam superposed surfaces and edge of a wing upper surface are processed into crude.

7. composite frame beam as claimed in claim 1 is characterized in that watering behind the described beam-ends part and is embedded with bent-up bar, and bent-up bar is zigzag, and two bent-up bar lower ends are connected and take the shape of the letter U.