CN212561982U - Fireproof structure of assembled steel structure beam-slab integrated part - Google Patents
Fireproof structure of assembled steel structure beam-slab integrated part Download PDFInfo
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- CN212561982U CN212561982U CN202020634756.2U CN202020634756U CN212561982U CN 212561982 U CN212561982 U CN 212561982U CN 202020634756 U CN202020634756 U CN 202020634756U CN 212561982 U CN212561982 U CN 212561982U
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Abstract
The utility model discloses a fireproof structure of an assembly type steel structure beam-slab integrated part, which comprises a plurality of main keels welded at the bottom of a beam-slab steel truss, wherein a cement fiberboard heat-insulating layer is fixed below the main keels, a plurality of secondary keels are nailed below the cement fiberboard, aluminum silicate cotton felt is filled between the secondary keels, and a bottom baud plate is fixed with the secondary keels; the steel truss structure has the advantages that the bottom of the steel truss of the assembled steel structure beam-slab integrated part forms a multi-layer fireproof heat insulation layer, the main keel and the bottom of the steel truss are welded to be used as main bearing parts of the lower multi-layer fireproof heat insulation layer, and the integral structure of the beam-slab integrated part is not influenced; the cement fiberboard forms fireproof and heat-insulating protection on the main keel, the steel truss and the floor slab; the secondary keel is used as a bearing connecting part to be fixed with the main keel and the cement fiberboard, the porter board and the secondary keel are matched to fix the aluminum silicate cotton felt, the porter board and the aluminum silicate cotton felt are good in fireproof and heat-insulating effects, and the secondary keel and the cement fiberboard are well protected against fire and heat.
Description
Technical Field
The utility model belongs to the technical field of the fire prevention technique of assembled steel construction building and specifically relates to a fire resistive construction of assembled steel construction beam slab integration portion article is related to.
Background
The fabricated steel structure building has the characteristics of design standardization, production industrialization, construction assembly, decoration integration, operation maintenance informatization and the like, and is one of the development trends of the building industry. The fire hazard can produce the destructive destruction effect to steel structure building, causes great loss of lives and property, in order to reduce conflagration risk and problem, just need constructor to have the fire prevention protective measure of new effectual article in assembled steel structure building construction process. The fire safety design requirement is that the fire endurance of the assembled steel frame structure beam is not less than 2.00h, and the fire endurance of the floor slab is not less than 1.50 h. The assembled steel structure beam-slab integrated component is formed by integrating a floor slab, a frame beam and a ceiling (suspended ceiling); therefore, the fire endurance of the assembled steel frame structure beam-plate integrated part is determined according to the requirements of the beam, namely, the fire endurance is not lower than 2.00 h. And because the bearing steel truss member of assembled steel construction beam slab integration portion article is numerous, and cross sectional dimension is less, and truss web is the down tube for the majority, is unfavorable for fire prevention coating's construction, more is not suitable for the water cooling method, from this the utility model discloses a fire protection measure of cladding method design beam slab integration portion article.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a fire resistive construction of assembled steel construction beam slab integration portion article is provided, to beam slab integration portion article and apply with multilayer fire resistive construction package, have better fire behavior.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a fire resistive construction of assembled steel construction beam slab integration part article, is fixed with cement fiberboard insulating layer including welding the many main joist to beam slab steel truss bottom under the main joist, and the nail has many secondary joist under the cement fiberboard, and the cotton felt of aluminium silicate is filled between the secondary joist, and the baud board of bottom is fixed with the secondary joist.
Preferably, the self-tapping screws for nailing the cross runners penetrate the cement fiberboard and then penetrate the back plate of the main runner. The secondary keel and the main keel are directly connected through the self-tapping screws, so that the load bearing of the fireproof structure is more stable, and the bottom porter board and the aluminum silicate cotton felt can be maintained even if part of the cement fiber board is cracked in case of fire.
Preferably, the spacing between the tapping screws is 300 mm. The interval is suitable, and the bearing in the stable region is mutually supported.
Preferably, the specification of the secondary keel is smaller than that of the main keel. The main keel has higher load bearing requirements than the cross keels.
Preferably, the main keel is a light steel keel 50mm × 50mm × 0.7 mm. The main keel and the bottom of the beam plate steel truss are welded and fixed, the structure of the steel truss is not damaged, the weight of a lower cement fiberboard, the secondary keel, the aluminum silicate cotton felt and the porter plate can be borne, and the light steel keel with a proper specification is selected, so that the light steel keel has light weight and good bearing performance.
Preferably, the cross runners are light gauge steel runners of 30mm x 0.7 mm. The secondary keel only needs to bear the weight of the aluminum silicate cotton felt and the baud plate, and the light steel keel with small specification is selected, so that the secondary keel is light in weight and good in bearing performance.
Preferably, the thickness of the cement fiber board is 6-8 mm. The cement fiber board plays a role in fire prevention and heat insulation, and the steel truss and the main keel are made of the protective beam board, but the cement fiber board cannot be too thick or too thin, the fire prevention and heat insulation performance is insufficient if the cement fiber board is too thin, and the weight is too large if the cement fiber board is too thick, so that the structural stability of the steel truss can be influenced.
Preferably, the thickness of the baud plate is 12 mm. The fireproof heat-insulation board has the functions of fire prevention and heat insulation, protects the secondary keel, and is good in fire resistance and light in weight.
Preferably, the volume weight of the aluminum silicate cotton is more than or equal to 120kg/m3. The packing is comparatively closely knit, blocks the circulation of air, plays the thermal-insulated effect of fire prevention, protection secondary joist and cement fiberboard.
Compared with the prior art, the utility model has the advantages that the bottom of the steel truss of the assembled steel structure beam-slab integrated part forms a multi-layer fireproof heat insulation layer, the main keel and the bottom of the steel truss are welded to be used as main bearing parts of the lower multi-layer fireproof heat insulation layer, and the integral structure of the beam-slab integrated part is not influenced; the cement fiberboard forms fireproof and heat-insulating protection on the main keel, the steel truss and the floor slab; the secondary keel is used as a bearing connecting part to be fixed with the main keel and the cement fiberboard, the baud board and the secondary keel are matched to fix the aluminum silicate cotton felt, the baud board and the aluminum silicate cotton felt are good in fireproof and heat-insulating effects, the secondary keel and the cement fiberboard are well protected against fire and heat, and the baud board is good in fireproof performance and light in weight.
Drawings
Fig. 1 is the structure schematic diagram of the assembled steel structure beam slab of the utility model.
Fig. 2 is an enlarged view of a portion a of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The utility model discloses assembled steel construction beam slab has coated multilayer fire resistive construction below beam slab integration portion article (101, 102) as shown in figure 1 and 2, and fire resistive construction is including welding many main joist 1 to beam slab steel truss 101 bottom, and 1 lower of main joist is fixed with 2 insulating layers of cement fiberboard, and 2 lower nails of cement fiberboard have many secondary joist 3, and the cotton felt 4 of aluminium silicate is filled between 3 secondary joist, and the baud board 5 of bottom is fixed with secondary joist 3.
In the embodiment, the main keel 1 is a light steel keel with the specification of 50mm × 50mm × 0.7 mm. The secondary keel 3 is a light steel keel with the specification of 30mm multiplied by 0.7mm, and the bearing requirement of the secondary keel 3 is smaller than that of the main keel 1. The thickness of the cement fiberboard 2 is 6-8 mm. The thickness of the baud plate 5 is 12 mm. The volume weight of the aluminum silicate cotton is more than or equal to 120kg/m3Less than 120kg/m3The filling is not dense enough.
The construction method of the fireproof structure specifically comprises the following steps:
s1, welding the main keel 1 to the bottom of the beam-slab steel truss 101; the welding parts 7 are arranged outside the two sides of the top of the main keel 1;
s2 nailing cement fiber boards 2 under the main keel 1, and trowelling the joints between the cement fiber boards 2 by adopting fireproof cement putty; the nail holes on the cement fiberboard 2 are also smoothed by adopting fireproof cement putty;
s3 nailing secondary joist 3 at the lower part of the cement fiberboard 2, filling aluminum silicate cotton felt 4 between the secondary joists 3, and filling aluminum silicate cotton in the secondary joists 3;
s4 the bottom layer baud board 5 is nailed on the secondary keel 3, the seam between the baud boards 5 and the nail hole on the baud board 5 are smoothed by fireproof cement putty;
s5 the gaps between floors 102 were filled with rock wool and smoothed with fire-resistant cement putty.
The air-conditioning pipeline connected with the lampshade arranged on the suspended ceiling and the air supply outlet is coated by aluminum silicate cotton with the thickness of more than or equal to 30 mm. The lampshade and the air-conditioning pipeline arranged on the ceiling are protected against fire, so that high-temperature flame and gas are prevented from entering the cavity of the floor slab through the opening of the lampshade and the air-conditioning pipeline.
Wherein, steel self-tapping screws 6 are adopted in steps s2, s3 and s4, and the distance between the self-tapping screws 6 is 300 mm; the self-tapping screws 6 are suitable in quantity and low in workload, and the bearing requirement in the area is met. Wherein, a self-tapping screw 6 for fixing the secondary joist 3 is longer, and the back plate of the secondary joist 3 passes through the back plate nailing the cement fiberboard 2 and penetrating out of the main joist 1, and the back plate of the joist is a transverse steel plate at the bottom.
The construction method has the advantages that the method can meet the requirements of rapid installation and construction of the fabricated steel frame structure, and is not easy to damage or destroy during transportation and field installation; the construction and maintenance period is short, and the influence on the construction operation of other work types is reduced; when the fireproof protection is constructed and used, no dust or gas harmful to human bodies is generated; the bottom of the steel truss of the assembled steel structure beam-slab integrated component is provided with a multi-layer fireproof heat-insulating layer, and the main keel and the bottom of the steel truss are welded to be used as main bearing parts of the lower multi-layer fireproof heat-insulating layer, so that the integral structure of the beam-slab integrated component is not influenced; the cement fiberboard forms fireproof and heat-insulating protection on the main keel, the steel truss and the floor slab; the secondary keel is used as a bearing connecting part to be fixed with the main keel and the cement fiberboard, the baud board and the secondary keel are matched to fix the aluminum silicate cotton felt, the baud board and the aluminum silicate cotton felt are good in fireproof and heat-insulating effects, the secondary keel and the cement fiberboard are well protected against fire and heat, and the baud board is good in fireproof performance and light in weight.
The fire resistance time of the beam plate is not less than 2.5h after multiple tests:
1. the temperature of the main keel is 380-420 ℃, the temperature in the cavity of the beam plate is 300-350 ℃, the temperature of the steel truss is 300-325 ℃, the maximum temperature rise of the back fire surface is 63 ℃, and the beam plate does not lose the bearing capacity, the integrity and the heat insulation property.
2. The porter board and the aluminum silicate cotton have good fireproof and heat insulation effects, have good protection effects on the secondary keel and the cement fiberboard, the secondary keel is not obviously burnt and damaged, the secondary keel is not obviously deformed, and the cement fiberboard is not seriously cracked and dropped.
3. The gaps between the floor slabs are filled with rock wool and sealed with fireproof cement putty, so that the fireproof effect is better.
4. The opening of the lampshade arranged on the suspended ceiling is not damaged or falls off, the temperature of the cavity at the upper part of the lampshade is slightly higher than that of the cavities at other positions, high-temperature flame and gas do not enter the cavity of the floor slab, and the fireproof protection method of the lampshade is effective.
In summary, after the beam-slab integrated part is acted by fire for 2.5 hours, the highest temperature rise of the back fire surface meets the requirement of the national standard on heat insulation, the mid-span limit deformation meets the requirement of the national standard on bearing capacity, and all the components are basically in an elastic stress state.
Claims (9)
1. The utility model provides a fire resistive construction of assembled steel construction beam slab integration part article which characterized in that: including many main joist (1) of welding to beam slab steel truss (101) bottom, be fixed with cement fiberboard (2) insulating layer under main joist (1), the nail has many secondary joist (3) under cement fiberboard (2), fills aluminium silicate cotton felt (4) between secondary joist (3), and baud board (5) and secondary joist (3) on bottom are fixed.
2. The fire protection structure of an assembled steel structure beam-plate integrated part according to claim 1, wherein: and a self-tapping screw (6) for nailing the secondary keel (3) penetrates through the cement fiberboard (2) and then penetrates out of the back plate of the main keel (1).
3. The fire protection structure of an assembled steel structure beam-plate integrated part according to claim 2, wherein: the distance between the self-tapping screws (6) is 300 mm.
4. The fire protection structure of the assembled steel structure beam-plate integrated component as claimed in any one of claims 1 to 3, wherein: the specification of the secondary keel (3) is smaller than that of the main keel (1).
5. The fire protection structure of an assembled steel structure beam-plate integrated part according to claim 4, wherein: the main keel (1) is a light steel keel with the diameter of 50mm multiplied by 0.7 mm.
6. The fire protection structure of an assembled steel structure beam-plate integrated part according to claim 4, wherein: the secondary keel (3) is a light steel keel with the diameter of 30mm multiplied by 0.7 mm.
7. The fire protection structure of the assembled steel structure beam-plate integrated component as claimed in any one of claims 1 to 3, wherein: the thickness of the cement fiberboard (2) is 6-8 mm.
8. The fire protection structure of the assembled steel structure beam-plate integrated component as claimed in any one of claims 1 to 3, wherein: the thickness of the baud plate (5) is 12 mm.
9. The fire protection structure of the assembled steel structure beam-plate integrated component as claimed in any one of claims 1 to 3, wherein: the volume weight of the aluminum silicate cotton is more than or equal to 120kg/m3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020634756.2U CN212561982U (en) | 2020-04-24 | 2020-04-24 | Fireproof structure of assembled steel structure beam-slab integrated part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020634756.2U CN212561982U (en) | 2020-04-24 | 2020-04-24 | Fireproof structure of assembled steel structure beam-slab integrated part |
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| CN212561982U true CN212561982U (en) | 2021-02-19 |
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| CN202020634756.2U Active CN212561982U (en) | 2020-04-24 | 2020-04-24 | Fireproof structure of assembled steel structure beam-slab integrated part |
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Denomination of utility model: Fire proof structure of fabricated steel structure beam plate integrated parts Effective date of registration: 20210907 Granted publication date: 20210219 Pledgee: Ningbo Yinzhou Rural Commercial Bank Co.,Ltd. Wuxiang sub branch Pledgor: NINGBO ZHONGZHOU BUILDING ENGINEERING Co.,Ltd. Registration number: Y2021330001400 |