CN212453254U

CN212453254U - Floor joist with reserved holes

Info

Publication number: CN212453254U
Application number: CN202020927674.7U
Authority: CN
Inventors: 陈国�; 于云飞; 姜浩; 吴静; 周通; 陈菲燕
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-02-02
Anticipated expiration: 2030-05-22

Abstract

The utility model provides a reserve superstructure joist of hole, including head joist (1), banding joist (2), floor joist (3), stull (4), steel shotcrete (5), trompil board (6) and self tapping screw (7), its characterized in that head joist (1) and the vertical perpendicular of floor joist (3), banding joist (2) and the vertical parallel of floor joist (3), head joist (1) and banding joist (2) are the channel-section steel, stull (4) are located the upper and lower both sides of floor joist (3), steel shotcrete (5) are H shaped steel, arrange along perpendicular floor joist (3) direction, trompil board (6) are arranged in equidistance between two steel shotcrete (5), each component passes through self tapping screw (7) and connects. The utility model has the characteristics of arrange in a flexible way, the hole of reservation conveniently passes through the pipeline, and the atress performance is excellent, can satisfy the standardized prefabrication of batch production.

Description

Floor joist with reserved holes

Technical Field

The utility model belongs to building structure field among the civil engineering, concretely relates to superstructure joist of reservation hole suitable for modern bamboo timber structure building.

Background

Today, sustainable development is advocated vigorously, the public awareness of environmental protection is continuously promoted, and energy-saving, environment-friendly and renewable green building materials are increasingly favored by people in order to reduce the dependence on high-energy-consumption and high-pollution building materials such as clay bricks, steel products, cement and the like. Bamboo and wood materials are used as green building materials, have the characteristics of light weight, high strength, reproducibility, beautiful appearance and the like, are widely applied to the building industry of countries and regions such as Europe, North America, Japan and the like, and are bound to become a trend in China. In the modern bamboo and wood structure, the holes formed in the joists for the ventilation pipelines, the water supply and drainage pipelines and the circuit system to pass through are effective ways for increasing the net height of the house and reducing the construction cost, but on the other hand, the holes weaken the effective cross section of the joists, so that the bearing capacity and the rigidity of the floor are reduced. How to ensure that the floor joist has enough bearing capacity and span under the condition of opening, is one of the difficulties in popularizing modern bamboo-wood structures at present.

In order to ensure that the joist of the floor has sufficient mechanical properties after being perforated, reinforcing methods such as adhering FRP, bamboo boards, steel plates, euryale ferox boards and the like are generally adopted. The FRP is pasted to effectively improve the bearing capacity of the floor joist, but the strengthening effect of the bending rigidity is not obvious, and the manufacturing cost is higher. The bamboo plates, the steel plates, the European pine plates and the like can be adhered to effectively prevent cracks at the holes from developing, but the lateral resistance of the floor joist cannot be effectively improved. In addition, in the actual construction and use process, a construction party or an owner sometimes illegally opens a hole to arrange a pipeline on the premise of not consulting a structural engineer, so that the structural bearing capacity is reduced and even the structure is directly damaged, and therefore the hole is reserved in advance during the design.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve just lies in: the utility model provides a floor joist with reserved hole that uses material environmental protection, with low costs, span are big, and have higher bearing performance simultaneously to current floor joist trompil back bearing capacity not enough, rigidity is low, shortcomings such as fragile destruction.

In order to solve the technical problem, the utility model provides a solution does: a floor joist with reserved holes comprises an end enclosure joist, an edge sealing joist, floor joists, cross braces, steel supports, perforated plates and self-tapping screws.

The basic principle of the utility model is as follows: the end socket joists and the edge sealing joists are channel steel and are positioned around the floor joists to transmit upper load to the beams and the columns; one end of the floor joist is connected with the seal head joist, and the other end of the floor joist is connected with the steel support to bear the load transmitted by the floor; the cross brace and the steel support are perpendicular to the floor joist, so that the overall stability is improved, and the lateral resistance of the structure is improved; the perforated plate is arranged between the two steel supports at equal intervals and used for placing and protecting the pipeline. The steel has high strength and good toughness, and can effectively improve the mechanical property and span of the floor joist by combining with bamboo materials.

The sealing head joists and the edge sealing joists are channel steel, the grade of steel is not lower than Q235, and screw holes are reserved at the joints of the upper flange and the lower flange.

Holes required for installing pipelines are reserved in the web plate of the edge sealing joist.

The end part of the floor joist is arranged in the groove of the seal head joist.

The floor joists and the cross braces are made of 3-5 years old large-diameter moso bamboos serving as raw materials, and the moisture content of the bamboo laminated wood or the recombined bamboo is not more than 12%.

The transverse struts are vertically and symmetrically arranged perpendicular to the floor slab joists, and the end parts of the transverse struts are arranged between the edge sealing joists and the floor slab joists.

The steel support is H-shaped steel, the grade of the steel is not lower than Q235, screw holes are reserved at the joint of the upper flange and the lower flange, the end part of the screw hole is arranged in the edge-sealed joist, and the two sides of the screw hole are respectively connected with the floor slab joist and the perforated plate.

The tapping plate is a wood-based structural plate which is an Ou pine plate or a plywood, the water content is not more than 12%, and the tapping plate is arranged between two steel supports at equal intervals.

The surface of the self-tapping screw is galvanized and subjected to anti-corrosion treatment, the grade of steel is not lower than Q235, and the intersection parts of the components are connected by drilling the self-tapping screw up and down.

Compared with the prior art, the utility model has the advantages of it is following:

(1) the bamboo is a renewable resource, has wide source, short growth period, energy conservation and environmental protection.

(2) The utility model discloses reserve the hole in advance, avoided the superstructure joist again the difficulty of interim trompil in construction and use.

(3) The edge sealing joists with the reserved holes are made of steel, so that the shearing resistance and bearing capacity of the holes are greatly improved, and the span of the floor joists is larger.

(4) The steel supports are positioned on two sides of the perforated plate, so that cracks are effectively prevented from developing, and the bearing capacity and rigidity of holes are increased.

(5) The edge sealing joist is made of channel steel, and the end socket joists and the steel supports are wrapped inside the edge sealing joist, so that the structural stability is improved, the lateral force resistance is increased, and the anti-seismic performance is good.

(6) The utility model belongs to assembled structure, the structure is nimble, construction convenience.

Description of the drawings:

the drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention.

FIG. 1 is a schematic structural diagram of the present invention

FIG. 2 is a schematic diagram of the present invention

In the figure: 1. sealing head joist, 2 sealing edge joist, 3 floor joist, 4 cross brace, 5 steel support, 6 perforated plate, 7 self-tapping screw

The specific implementation mode is as follows:

in order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in fig. 1 and 2, the utility model provides a floor joist with reserved holes, which comprises a sealing head joist, an edge sealing joist, a floor joist, a cross brace, a steel support, a perforated plate and self-tapping screws. The sealing head joists and the edge sealing joists are made of channel steel, the steel supports are made of H-shaped steel, and the grade of the steel is not lower than Q235. The floor slab joists and the cross braces are made of 3-5 years old large-diameter moso bamboos serving as raw materials, and the moisture content of the bamboo laminated wood or the recombined bamboo is not more than 12%. The perforated plate is a wood-based structural plate, and the water content is not more than 12%. The surface of the self-tapping screw is galvanized and anticorrosive treated, and the grade of the steel is not lower than Q235.

The end socket joists are arranged at two ends of the floor slab joists, the floor slab joists are equidistantly arranged along the direction vertical to the end socket joists, one end of each floor slab joists is tightly attached to a web plate of each end socket joists and is connected with upper and lower flanges of each end socket joists through self-tapping screws, and the other end of each floor slab joists is tightly attached to a web plate of each steel support and is connected with upper and lower flanges of one side of each steel support through self-tapping screws. The cross braces are symmetrically arranged on the upper side and the lower side of the floor joist at equal intervals along the vertical direction of the floor joist, and play a role in improving the structural stability. The perforated plate is arranged between the two steel supports and is connected with the upper flange and the lower flange of the two steel supports through self-tapping screws. The edge sealing joists are channel steel and are arranged on two sides of the floor joists, the end enclosure joists and the steel supports are wrapped in the edge sealing joists, and the holes are aligned with the holes of the perforated plate.

In the field construction process, the floor joist with the reserved holes is fixed with the beam column framework, then the heat-preservation and heat-insulation material is filled in the floor joist and the beam column framework, finally a floor slab and a ceiling are paved, and gaps are filled by coating elastic glue.

Example 1: a head joist of a floor joist with reserved holes is a channel steel, and the section size is 180mm multiplied by 50mm multiplied by 10mm (the section height multiplied by the flange width multiplied by the web thickness multiplied by the flange thickness); the edge sealing joist is a channel steel, and the section size is 160mm multiplied by 50mm multiplied by 10mm (the section height multiplied by the flange width multiplied by the web thickness multiplied by the flange thickness); the joist and the cross brace of the floor are made of bamboo integrated materials, and the section dimensions (height multiplied by width) are respectively 140mm multiplied by 40mm and 10mm multiplied by 40 mm; the steel support is H-shaped steel, and the section size is 160mm multiplied by 90mm multiplied by 10mm (the section height multiplied by the flange width multiplied by the web thickness multiplied by the flange thickness); the perforated plate is an Okinson plate, the size is 140mm multiplied by 120mm multiplied by 40mm (height multiplied by width multiplied by thickness), and the perforated radius is 50 mm; the length of the tapping screw is 80 mm.

Claims

1. A floor joist with reserved holes comprises an end enclosure joist (1), an edge sealing joist (2), a floor joist (3), cross braces (4), steel supports (5), perforated plates (6) and self-tapping screws (7), and is characterized in that the end enclosure joist (1) is vertical to the longitudinal direction of the floor joist (3), the edge sealing joist (2) is parallel to the longitudinal direction of the floor joist (3), the end enclosure joist (1) and the edge sealing joist (2) are made of channel steel, the cross braces (4) are positioned on the upper side and the lower side of the floor joist (3), the steel supports (5) are made of H-shaped steel and are arranged along the direction vertical to the floor joist (3), the perforated plates (6) are arranged between the two steel supports (5) at equal intervals, and all the components are connected through the self-tapping screws (7).

2. The floor joist with reserved holes as claimed in claim 1, wherein the end joist (1) and the edge sealing joist (2) are channel steel, the grade of steel used is not lower than Q235, and screw holes are reserved at the joints of the upper and lower flanges.

3. A pre-perforated floor joist according to claim 1, characterised in that the edge joists (2) are provided with holes at the webs for the installation of pipes.

4. The floor joist with reserved holes as claimed in claim 1, characterized in that the ends of the floor joist (3) are placed in the grooves of the head joist (1).

5. The floor joist as claimed in claim 1, wherein the floor joist (3) and the cross braces (4) are made of 3-5 years old large-diameter moso bamboos as raw materials, and the moisture content of the bamboo laminated material or the recombined bamboo is not more than 12%.

6. The pre-perforated floor joist according to claim 1, characterized in that the cross braces (4) are vertically and symmetrically arranged with respect to the floor joists (3), and the ends of the cross braces (4) are disposed between the edge-sealed joists (2) and the floor joists (3).

7. The floor joist with reserved holes as claimed in claim 1, wherein the steel supports (5) are H-section steel with grade no less than Q235, screw holes are reserved at the joints of the upper and lower flanges, the ends are placed in the edge-sealed joist (2), and the floor joist (3) and the perforated plate (6) are connected to the two sides respectively.

8. The floor joist as claimed in claim 1, wherein the perforated plate (6) is a wood-based structural plate, such as an europa or plywood, having a moisture content of no more than 12%.

9. The floor joist with reserved holes as claimed in claim 1, wherein the surface of the self-tapping screw (7) is galvanized and anticorrosive treated, the grade of the steel used is not lower than Q235, and the intersecting parts of the components are connected by drilling the self-tapping screw (7) up and down.