CN205822542U - A kind of novel two-way beam of falling T composite floor - Google Patents

Abstract

A novel two-way inverted T-beam composite floor slab is used in building structures in the engineering field. It includes a well-shaped member composed of a plurality of inverted T-shaped steel beams, and a plurality of small holes are sequentially opened on the web of the inverted T-shaped steel beam of the well-shaped member, and the small holes on the web of the inverted T-shaped steel beam Reinforcement bars are intersected between them, and a two-way steel rib structure that acts as a force during construction is formed by splicing joints between multiple well-shaped members. The ribs and beams of the two-way steel rib structure are arranged in sequence as permanent formwork for the floor. The lightweight prefabricated panel is uniformly cast with concrete on the two-way steel rib structure and the lightweight prefabricated panel. Its mechanism has the characteristics of high strength, high rigidity and good ductility, no need for formwork, simple construction, simple operation, light weight, low structural layer height, increased effective use of space, and good economic benefits.

Description

A New Type of Two-way Inverted T Beam Composite Floor Slab

technical field

The utility model relates to a composite floor slab, which is especially suitable for a novel two-way inverted T-beam composite floor used in building structures in the engineering field.

Background technique

At present, as the country vigorously develops the industrialization of steel structure housing, steel structure housing can not only meet the requirements of sustainable development of building resources, but also help accelerate the process of housing industrialization, meet the requirements of rapid urbanization, and conform to the national industrial policy , has broad application prospects.

In order to realize the intensive and factory production of steel structure residences and accelerate the development of steel structure residences, it is first necessary to solve the structural system problems that affect the development of steel structure residences, such as the floor system, so that it can achieve standardization, serialization, and mass production, thereby promoting Industrialization development of steel structure housing.

Many forms of floor structures have been proposed at home and abroad, and in order to facilitate rapid construction and reduce the thickness of the floor, the form of composite floors is often used, and composite flat beam floors are one of them. Composite flat beam floor slabs have obvious advantages in ordinary steel structure residential floor slabs, which have the characteristics of reducing the weight of the floor slab, improving headroom and good fire resistance. However, the connection between the steel beam and the concrete in the traditional composite flat beam floor slab is realized by setting the shear parts, and the setting of the shear parts is complicated and cannot guarantee the combination effect of the steel beam and the concrete well. Moreover, the traditional composite flat-beam floor slabs mostly adopt one-way slab layout, and the floor slab thickness is relatively large.

Contents of the invention

Aiming at the above technical problems, a novel two-way inverted T-beam composite floor slab with simple structure, light weight, no need to disassemble the bottom formwork, two-way layout, small thickness, good integrity, reasonable force and economy is proposed.

In order to achieve the above-mentioned technical purpose, the novel two-way inverted T-beam composite floor slab of the present utility model includes a well-shaped member composed of a plurality of inverted T-shaped steel beams, and the inverted T-shaped steel beam web of the well-shaped member is A number of small holes are opened in sequence, and steel bars are arranged crosswise between the small holes on the web plate of the inverted T-shaped steel beam. There are splicing nodes at the edge of the well-shaped members, and the splicing nodes between the multiple well-shaped members form a construction structure. The two-way steel rib structure acts as a force-bearing structure, and the cells between the rib beams of the two-way steel rib structure are arranged in sequence with lightweight prefabricated slabs as permanent formwork for the floor slab, and the two-way steel rib structure and the lightweight prefabricated slab are evenly cast with concrete.

The splicing node is as follows: an L-shaped splicing plate is arranged on both sides between the inverted T-shaped steel beams of the well-shaped member and the well-shaped member, and the lower flange splicing plate is arranged below, which is fastened by bolts The diameter of the small hole is larger than the diameter of the steel bar; the two-way steel rib structure and the lightweight prefabricated plate are evenly cast with concrete, and the steel bar passing through the small hole on the inverted T-shaped steel beam web is bonded to resist The function of cutting pieces enhances the combined effect of the two.

Beneficial effect:

(1) The steel beam is embedded in the concrete floor, and the cohesive force between the steel beam and the concrete is used to realize the joint action of the two, which makes good use of the mechanical properties of the two materials;

(2) The two-way flat beam form is adopted to reduce the self-weight of the floor, and there is no secondary beam in the floor, which can minimize the height of the structure and increase the effective use of space;

(3) The concrete provides lateral support for the steel girder, which prevents the plane instability of the steel girder, and the local stability and overall stability of the steel girder can basically be ignored during normal use;

(4) For the two-way inverted T-beam composite floor, because the concrete reinforcement of the upper flange is interspersed in the web of the steel beam, this kind of anti-shear measure is better than the method of separately setting up the shear parts, and the two-way symmetrical arrangement is adopted at the same time. Therefore, there will be no longitudinal splitting cracks due to less horizontal reinforcement configuration;

(5) Since the inverted T-shaped steel beam does not use the flange that is usually placed on the steel beam near the neutral axis, it saves steel, thereby reducing the structural cost;

(6) Concrete wraps the steel beams, which improves the fire prevention and anticorrosion capabilities of the steel beams, and reduces the fire prevention and anticorrosion costs that account for a relatively high proportion of the steel structure cost of the house;

(7) At the same time, the formwork is omitted and the formwork process is reduced to shorten the construction period, which has good technical and economic benefits;

(8) The lower surface of the floor slab is flat, which is conducive to the flexible layout and free separation of rooms, and does not require a suspended ceiling, which can well meet the functional requirements of the residence.

Description of drawings

Fig. 1 is the structural representation of the utility model novel two-way inverted T-beam composite floor;

Fig. 2 is a cross-sectional view of the utility model's new two-way inverted T-beam composite floor;

Fig. 3 is the splicing diagram of well-shaped member described in the utility model;

Fig. 4 is the cross-sectional view of the splicing node of the inverted T-shaped steel beam described in the utility model;

Fig. 5 is a side view of the splicing node of the inverted T-shaped steel beam of the present invention.

In the figure, 1-inverted T-shaped steel beam, 2-lightweight prefabricated slab, 3-steel bar, 4-concrete, 5-joint joint, 6-L-shaped spliced plate, 7-common spliced plate, 8-bolt, 9- Small hole.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Fig. 1, Fig. 2 and Fig. 3, the novel two-way inverted T-beam composite floor of the present utility model adopts a two-way flat beam form, and comprises a well-shaped member composed of a plurality of inverted T-shaped steel beams 1, the well-shaped A plurality of small holes 9 are sequentially opened on the web plate of the inverted T-shaped steel beam 1 of the shaped member, and steel bars 3 are intersected between the small holes 9 on the web plate of the inverted T-shaped steel beam 1, and the diameter of the small holes 9 is larger than that of the steel bars. The diameter of 3 should be large, and there are splicing nodes 5 at the edge of the well-shaped components, and the splicing nodes 5 between multiple well-shaped components form a two-way steel rib structure that acts as a force during construction, as shown in Figure 4 and Figure 5 As shown, the splicing node 5 is that an L-shaped splicing plate 6 is provided on both sides between the inverted T-shaped steel beams 1 of the well-shaped member and the well-shaped member, and the lower flange splicing plate is provided below 7. Fastened by bolts 8, each section between the rib beams of the two-way steel rib structure is sequentially arranged with lightweight prefabricated slabs 2 as permanent formwork for the floor slab, and concrete is evenly cast on the two-way steel rib structure and lightweight prefabricated slabs 2 4. Concrete 4 is evenly cast on the two-way steel rib structure and the lightweight prefabricated slab 2, and the steel bar 3 passing through the small hole 9 on the web of the inverted T-shaped steel beam 1 is bonded to play the role of a shear member, strengthening the combined effect of the two.

The utility model combines the characteristics of good mechanical performance of the two-way densely ribbed floor, and at the same time, the steel rib-concrete composite beam gives full play to the respective performance advantages of concrete and steel, and arranges the steel rib-concrete composite floor in two directions to form a high-strength, high-rigidity, Good ductility two-way rib beam structure. The two-way rib beam frame composed of inverted T-shaped steel beams 1 can bear the initial construction load, and the two-way arrangement makes the two-way lateral stiffness consistent, which is beneficial to the earthquake resistance of the floor. The lightweight prefabricated slab 2 can be used as a permanent formwork for the floor slab again, and the bottom of the slab is flat, so there is no need to do follow-up work such as suspended ceilings, and the construction is convenient. The steel bars 3 are interspersed in the web of the inverted T-shaped steel beam 1, which can act as studs, improve the bonding effect between the concrete 4 and the inverted T-shaped steel beam 1, and are beneficial to the mutual action. Most of the inverted T-shaped steel beam 1 is wrapped by concrete, which greatly reduces the fire prevention and anti-corrosion treatment of the inverted T-shaped steel beam 1 . The inverted T-shaped steel girder 1 is spliced into a whole through the L-shaped splicing plate 6, the lower flange splicing plate 7 and the bolts 8. The construction is simple and the operation is simple, and the on-site work is greatly reduced.

Claims (4)

1. the novel two-way beam of falling a T composite floor, it is characterised in that: it includes the well word being made up of many inverted T shape girder steels (1) Type component, inverted T shape girder steel (1) web of described intersecting parallels component has multiple aperture (9), inverted T shape girder steel (1) web successively On aperture (9) between arranged crosswise have reinforcing bar (3), be provided with at intersecting parallels Member Lip splicing node (5), multiple intersecting parallels structures The two-way shaped steel rib structure of stress effect, the rib of two-way shaped steel rib structure is played when constituting construction by splicing node (5) between part Liang Jiange district lattice are sequentially arranged the light-weight precast slab (2) of the permanent template as floor, and described two-way shaped steel rib structure is with light Concrete (4) uniformly it is cast with on matter precoated plate (2).

The novel two-way beam of falling T composite floor the most according to claim 1, it is characterised in that: described splicing node (5) is: Being provided with L-shaped splice plate (6) on both sides between the inverted T shape girder steel (1) of intersecting parallels component and intersecting parallels component, lower section sets There is lower flange splice plate (7), fastened by bolt (8).

The novel two-way beam of falling T composite floor the most according to claim 1, it is characterised in that: described aperture (9) diameter compares steel The diameter of muscle (3) wants big.

The novel two-way beam of falling T composite floor the most according to claim 1, it is characterised in that: state two-way shaped steel rib structure and Concrete (4) uniformly it is cast with, by passing the reinforcing bar (3) of aperture (9) on inverted T shape girder steel (1) web on light-weight precast slab (2) Carrying out bonds plays the effect of shearing-resistant member.