CN103015628A

CN103015628A - Built-in honeycomb steel plate steel-encased high-intensity concrete combined beam

Info

Publication number: CN103015628A
Application number: CN2012105385849A
Authority: CN
Inventors: 徐金俊; 陈宗平; 薛建阳
Original assignee: Guangxi University
Current assignee: Guangxi University
Priority date: 2012-12-13
Filing date: 2012-12-13
Publication date: 2013-04-03

Abstract

A high-strength concrete composite beam with built-in honeycomb steel plate and outer steel. The steel skeleton is composed of a pair of inverted T-shaped steel, two inverted L-shaped angle steels and connecting steel strips; There are several through holes on the vertical plate of the T-shaped steel; two parallel inverted L-shaped angle steels are respectively located on the left and right upper sides of the inverted T-shaped steel; the two inverted L-shaped angle steels are connected by horizontal strips, the inverted T-shaped steel and The inverted L-shaped angle steels are connected by vertical strips. The application of high-strength concrete to long-span beam members, combined with the reasonable arrangement of steel, avoids premature cracks due to the brittleness of high-strength concrete. The invention fully exerts the mechanical advantages of concrete and steel, and the vertical web of the inverted T-shaped steel extends into the beam, which can simultaneously enhance the effective bonding with the concrete and provide appropriate shear bearing capacity: it can also reduce the cost of the formwork during construction Use, reduce the formwork process, improve the construction progress, and facilitate the mechanized construction work on it.

Description

A kind of built-in honeycomb steel plate Covered with Angles high-strength concrete compound beam

Technical field

The present invention relates to Steel concrete combining structure and combination construction, particularly a kind of built-in honeycomb steel plate Covered with Angles high-strength concrete compound beam.

Background technology

At some special constructions (such as large-size thermal power plant, longspan structure and highrise building) in,, increase owing to intercolumniation large (such as the distance between two pillars 7 among Fig. 1) causes the span of beam as its part or all of structural system (comprising mega-frame, framed-tube structure system etc.) with framework.Along with modern high-rise, stride development with heavy structure greatly, the user is increasing to the felt of architectural space, and general ordinary reinforced concrete (RC) beam or steel reinforced concrete (SRC) beam are in order to satisfy the strength and stiffness requirement of structural element, have to improve arrangement of reinforcement (steel) rate and the enlarging section size in cross section, cause therefrom dead load excessive, increase geological process, and have influence on the distribution of each internal force in structural system, such as " the weak post of the brutal " phenomenon that occurs not conforming to seismic design of structures.For the ductility demand that prevents above-mentioned phenomenon and satisfy structure, must seek that a kind of supporting capacity is large, deformability beam preferably.

The Covered with Angles concrete structure technique is a kind of design of building structures and reinforcing technique of newly-developed, is a kind of form of Steel concrete combining structure.The Covered with Angles concrete combination beam is reinforcing bar or the shaped steel that the outsourcing steel (angle steel, steel plate etc.) that fit over the beam external surface partly or entirely replace inside concrete, the steel of outsourcing are by being connected (being generally welding) with corresponding connector (such as reinforcing bar, lacing or sew part etc.), the inner concrete of operative constraint therefrom, thereby improve every load-carrying properties index of beam, its stress performance is improved.

For these two kinds of different materials of mechanical property of steel and concrete are effectively integrated, form a cooperative integral body, by configuring the anchor measures such as certain peg, inner stirrup, strengthen the cementation between the outsourcing Steel concrete.Technical scheme of the present invention is researched and developed for addressing this problem.

Summary of the invention

The technical problem to be solved in the present invention provides that a kind of strength and stiffness are high, between high-strength concrete and the steel caking property good, avoid high-strength concrete to be prone to the built-in honeycomb steel plate Covered with Angles high-strength concrete compound beam of crack problem.

The present invention solves the problems of the technologies described above with following technical scheme:

A kind of built-in honeycomb steel plate Covered with Angles high-strength concrete compound beam waters full high-strength concrete in steel frame inside; Steel frame is by one pair of inverted T-shaped steel, two inverted L-shaped angle steel and connect the steel lacing and form; The bottom of steel frame is the transverse slat of inverted T-shaped steel, and some through holes are arranged on the vertical plate of inverted T-shaped steel; Two parallel inverted L-shaped angle steel lay respectively at the inverted T-shaped steel about the top; Connect with horizontal lacing between two inverted L-shaped angle steel, be connected to erect lacing between inverted T-shaped steel and the inverted L-shaped angle steel.

High-strength concrete is the concrete of strength grade of concrete 〉=C50, and the preparation method is with China's concerned countries standard.

The inverted T-shaped steel has the honeycomb steel plate of a plurality of through holes to consist of by a horizontal steel plate and one, and the honeycomb steel plate vertically is welded in horizontal steel plate middle part along its length.

The inverted L-shaped angle steel is the angle steel that is welded into or is rolled into by two block plates, connects by the horizontal lacing of some band steels at regular intervals between two inverted L-shaped angle steel, consists of the empty stomach of falling a flute profile reinforcing bar.

Be connected by the perpendicular lacing of some band steels at regular intervals between inverted T-shaped steel and the two inverted L-shaped angle steel.

With respect to prior art, technical scheme of the present invention has the following advantages:

(1) high-strength concrete is applied to large span beam type member, in conjunction with the reasonable setting of steel, avoided producing too early the crack because of the fragility of high-strength concrete.

(2) because the beam bottom is steel plate, given full play to the mechanics advantage of concrete and steel bi-material, concrete provides resistance to compression, and steel provide favourable tension.

(3) the vertical web with the inverted T-shaped steel stretches into beam inside, and can strengthen on the one hand with concrete has an effective adhesive, can suitably provide shear-carrying capacity on the other hand.

(4) set honeycomb steel plate has remedied the bad weakness of high-strength concrete and steel adhesive property, so that bi-material can co-operation.

(5) formation of steel frame not only can reduce the use of template in the construction, reduces the operation of formwork, improves construction speed, and favourable thereon mechanized construction operation.

Description of drawings

Fig. 1 is a kind of built-in honeycomb steel plate Covered with Angles high-strength concrete compound beam of the present invention---reinforcing bar (shaped steel) concrete column frame plane schematic diagram;

Fig. 2 is the structural representation of the inverted T-shaped steel of compound beam of the present invention;

Fig. 3 is the space structures schematic diagram of compound beam of the present invention;

Fig. 4 is the structural representation of compound beam A-A section of the present invention among Fig. 1.

Among the figure: the perpendicular honeycomb steel plate 3-of the dull and stereotyped 2-inverted T-shaped steel of 1-inverted T-shaped steel erects the horizontal lacing 6-of lacing 4-inverted L-shaped angle steel 5-high-strength concrete 7-pillar

The specific embodiment

In order to give full play to the advantage of concrete and this bi-material of steel, namely concrete has the advancing side that compressive property is good, steel are suitable for structure, through rationally design, thereby makes its mutual supplement with each other's advantages.Built-in honeycomb steel plate Covered with Angles high-strength concrete compound beam proposes with regard to being based on above-mentioned theory: the inverted T-shaped steel is disposed at advancing side at the bottom of the beam, compare with common RC beam, the inverted T-shaped steel not only can participate in the contribution of tension, shear strength, and can effectively avoid beam to cause the appearance in crack greatly because of span, avoid causing the sense of insecurity psychology of indoor occupant.The utilization of high-strength concrete can improve the relative intensity of member, increases indoor headway thereby effectively reduce therefrom deck-molding, and alleviates the beam deadweight.In order to overcome the brittleness of high-strength concrete, avoid between the Steel concrete adhesion stress to lose efficacy, the web place of T steel plate is offered circle or diamond hole.The setting of above-mentioned honeycomb steel plate is divided into several cells with the outsourcing steel with the rectangular cross section of beam, retrains thus inner high-strength concrete, further improves component strength.

Consider from the angle of convenient construction, thereby compound beam of the present invention has advantages of the template of saving, reduces a die process and shorten a construction period, and the steel frame that forms can be used as in the construction operation for mechanically operated platform, reduce scaffold.Therefore, can greatly reduce construction costs, save cost.

In general, built-in honeycomb steel plate Covered with Angles high-strength concrete compound beam have that the needs, the supporting capacity that satisfy building function are high, anti-earthquake ductility good, easy construction and reduce the advantage such as cost.

Below in conjunction with drawings and Examples technical scheme of the present invention is further specified:

A kind of built-in honeycomb steel plate Covered with Angles high-strength concrete compound beam, comprise by a horizontal steel plate 1 with is connected that block inverted T-shaped steel that vertical honeycomb steel plate 2 is welded into, a pair of inverted L-shaped angle steel 4, a row of horizontal connect lacing 5, two rows vertically connect lacings 3 and inner high-strength concretes 6.

Horizontal steel plate 1 and vertically honeycomb steel plate 2 thickness are larger, according to the form of the inverted T-shaped inverted T-shaped steel that is welded, at the bottom of the beam of horizontal steel plate as compound beam, with steel plate vertical, that honeycomb hole is arranged as its web.Wherein the collaborative part concrete participation of the steel plate of bottom beam is contributed by curved tension; Vertical steel plate mainly participates in the shear contribution of beam, and strengthens between steel and the concrete and be connected, and makes it into as a whole.

Two inverted L-shaped angle steel 4 are by being welded to connect with horizontal lacing 5, thereby consist of an empty stomach framework that falls flute profile.The inverted L-shaped angle steel of this framework participates in the compound beam anti-bending bearing capacity on the one hand, and is jointly stressed with the concrete compression district, but increasing section is joined the steel rate and retrained inner concrete on the other hand, is beneficial to ductility demand.

The inverted T-shaped steel is connected by the vertical lacing 3 in both sides with the framework of falling the flute profile, consists of the steel frame of a rectangle.

During formwork, only need at the both sides of steel frame support template, then from back after wherein build high-strength concrete, form built-in honeycomb steel plate Covered with Angles high-strength concrete compound beam at this point.So construction not only can realize the steel frame suitability for industrialized production, and can greatly save making and the supporting of template, thereby reaches the purpose that reduces construction period, accelerating construction progress, saving construction cost.

Claims

1. A high-strength concrete composite beam with built-in honeycomb steel plate and outsourcing steel, comprising an external steel skeleton and internal filling of high-strength concrete, characterized in that the steel skeleton is composed of a pair of inverted T-shaped steel, two inverted L-shaped angle steels and connecting steel strips ; The bottom of the steel skeleton is the horizontal plate of the inverted T-shaped steel, and there are several through holes on the vertical plate of the inverted T-shaped steel; The angle steels are connected by horizontal strips, and the inverted T-shaped steels and inverted L-shaped steels are connected by vertical strips.

2. A kind of built-in honeycomb steel plate outsourcing steel high-strength concrete composite beam as claimed in claim 1, characterized in that the high-strength concrete is the concrete of concrete strength grade ≥ C50, and the preparation method is the same as the relevant national standards of my country.

3. A kind of high-strength concrete composite beam with built-in honeycomb steel plate outsourcing steel as claimed in claim 1, it is characterized in that the inverted T-shaped steel is made of a horizontal steel plate and a honeycomb steel plate with a plurality of through holes, and the honeycomb steel plate is along the length direction Vertically welded to the middle of the horizontal steel plate.

4. A kind of high-strength concrete composite beam with built-in honeycomb steel plate and outer steel cladding as claimed in claim 1, characterized in that the inverted L-shaped angle steel is an angle steel welded or rolled by two steel plates, and one of the two inverted L-shaped angle steels They are connected by a number of flat steel horizontal strips with a certain interval to form an inverted trough-shaped hollow steel frame.

5. A high-strength concrete composite beam with built-in honeycomb steel plate and outer steel cladding as claimed in claim 1, characterized in that the inverted T-shaped steel and two inverted L-shaped angle steels are connected by some flat steel vertical strips with a certain distance .