JPH0533406A - Steel frame vibration isolation fireproof coating method - Google Patents

Abstract

(57) [Summary] (Corrected) [Structure] Inorganic fiber heat insulating felt 2 is wrapped around a steel column, steel beam, etc. to hold it in close contact, and at a certain distance from this, it is composed of type steel 4. A steel frame anti-vibration fireproof coating method in which a fireproof heat insulating plate 10 such as a gypsum board is attached to the outside of a rectangular tubular frame. [Effect] Since the fireproof insulation board is not directly fixed to the inorganic fiber-coated steel frame but is independent, the force of the steel columns, steel beams, etc. is not transmitted directly to the fireproof insulation board even if the earthquake or building shakes. In addition, the fireproof heat insulating plate is not damaged or fallen off, the heat insulating property is maintained, and the fireproof performance can be maintained without spoiling the aesthetic appearance. Inorganic fiber felt is combined with a non-breathable fireproof insulation plate against fire to improve fireproof insulation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof heat insulating coating method which is not affected by vibrations of structural materials in steel frame fireproof coating methods such as high-rise and super high-rise buildings or vibrations such as earthquakes.

[0002]

2. Description of the Related Art Conventionally, as a method of coating a steel frame such as a beam or a pillar of a building with a refractory material, rock wool is mainly used as a main material directly on the steel frame, and a Portland cement binder and a water-soluble powdered organic paste material are blended with this. The dry refractory coating method, in which the refractory material prepared by spraying with water is sprayed on the surface of the steel frame, or the refractory material prepared as a viscous paste with Portland cement and water is pumped by rock pump and sprayed with a spray gun. Adhesive for coating method or molded board such as asbestos calcium silicate board, precast concrete board,
The fireproof coating method is applied by using a molded plate that is directly attached to the steel frame with nails and the like.

In the former dry or wet fireproof coating method, not only a spraying machine is required, but also mortar mixing and uniform spraying on site require skill, and the time and effort required for construction are high. In addition, there is a problem that the mortar and fiber materials scatter and affect the human body and stain the surroundings. At the same time, the fire-resistant coating of the steel frame and the wall body are integrated, so if the steel frame shakes, the joint part with the wall Peeling off fireproof coating,
There are some problems such as falling off and the fire resistance cannot be maintained.

The latter method of forming a molded plate is a method of applying a fireproof coating while assembling a fireproof heat insulating molded plate produced in a factory at a construction site. In this method, there is no problem as described above and However, since the molded plate is attached directly to the column or fixed to the steel frame, the molded plate is attached to the angle, etc. due to structural fluctuations, peeling of the adhesive due to earthquakes, etc. Due to damage, etc., the fire resistance cannot be maintained, which is a problem. Also, since the weight of each molded plate is heavy, it takes a lot of work to connect it, and the foundation work becomes large,
Currently, it costs money.

In Japanese Patent Laid-Open No. 57-197349, a felt material formed mainly of inorganic fibers is used as a fireproof coating material for coating a steel frame, and the felt material is fixed to the steel frame by a pin or a stud. A method is disclosed in which a hooking member such as a bolt is formed by welding means, and a steel frame for preventing the felt material from coming off is covered with a refractory material at the tip of this member. However, the felt material formed by using inorganic fibers such as rock wool and glass wool as a main material cannot be applied to a place where fire resistance of 1000 ° C. or higher is required.

[0006] In view of this, Japanese Patent Laid-Open No. 156459/1987 discloses a fire-resistant coating material obtained by laminating rock wool felt or glass wool felt as a base material on which ceramic fiber felt is laminated and integrally molding the ceramic fiber felt on the outside. There is disclosed a fireproof coating method for attaching to a steel frame. However, in a fireproof coating in which only these inorganic fiber felts are attached in close contact with the steel frame, the inorganic fibers themselves do not respond to heating by a hot air flow such as convective heat transfer like a fire, probably because of voids between the fibers. Even if it has heat resistance, the temperature of the steel frame itself may rise and exceed the allowable steel material temperature of 350 ° C., which requires a thickness of the refractory coating, resulting in a problem that it becomes heavy. In addition, in the case of apparent columns and the like, a surface material is required.

From this point of view, the applicant of the present invention previously disclosed in Japanese Patent Laid-Open No. 2-296946 that an inorganic fiber felt was directly wound around a steel frame and closely adhered thereto, and a fireproof heat insulating plate was fixed to the steel frame to prevent an earthquake or shaking of a building. We proposed a vibration-isolated fireproof coating method for low-rise buildings, which is difficult to be damaged or fallen off by absorbing the vibration such as with inorganic fiber felt. The present invention is intended to improve the present invention for buildings such as high-rise and super-high-rise buildings where the steel frame shakes greatly.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to combine an inorganic fiber felt and a fireproof heat insulating plate to improve fireproof heat insulating properties and to prevent damage from earthquakes and building shaking.
The purpose of the present invention is to provide a vibration-isolating fireproof coating method with further improved seismic resistance that does not fall off.

[0009]

The present inventors have combined an inorganic fiber felt and a fireproof heat insulating plate to increase fireproof heat insulating property, and contact a corner of a steel frame with a mouth-shaped, U-shaped or L-shaped spacer. Even if the fireproof heat insulating plate is fixed through this, it may be damaged by the earthquake because the fireproof heat insulating plate is attached in close contact with the steel frame against shaking of the steel frame, and Since the pillars are fixed by fasteners, it is found that the pillars expand and collapse due to heating, and the pillars are damaged, and the fireproof insulation plate floats and cracks. The inventors have found that the problem can be solved by providing a shock absorber on both ends of the steel material and the pillar material, and completed the present invention.

That is, according to the present invention, (1) when a steel frame such as a steel frame column or a steel beam is surrounded by a fireproof and heat-insulating plate, a heat insulating material mainly composed of inorganic fibers is attached to the steel frame.
A plurality of pillars that can support one end of a pillar material with a certain distance from the steel frame, and place steel molds longer than one side of the steel cross-section on the floors on both sides of the steel cross-section and surround the steel frame with the steel molds. Supporting and fixing the lower end of the material, fixing the upper end at the ceiling, and attaching a fireproof heat insulating plate to the outside of the pillar material separately from the outer surface of the fireproof coating of the steel frame. It is a construction method, (2) type steel material is a light-weight channel steel material, and pillar material is a light weight C-type or square-shaped steel material. Is lightweight channel steel or L-shaped or T-shaped steel, and the pillar material is cement,
The method for constructing an anti-vibration and fire-resistant coating for steel frames according to the preceding paragraph (1), which is an inorganic molding material such as gypsum, (4) type steel material is lightweight channel steel material or L-type or T-type steel material, and the pillar material is wood-based. It is a steel frame vibration-isolating fireproof coating method according to the preceding paragraph (1), which is a mold material, (5)
When fixing a pillar material to a shaped steel material, an inorganic heat insulating material is provided at the upper end of the pillar material, and an inorganic heat insulating material and / or a resin or rubber shock absorber is provided at the lower end of the pillar material, as described in the preceding paragraph (1). Is.

The present invention will be described in detail below. First, H
A heat insulating felt such as rock wool, glass wool, or rock wool + ceramic fiber laminated felt is wrapped around a steel frame such as a mold or die steel, and fixed by means such as a pin having one end welded to the steel frame. Needless to say, they may be bonded with a heat-resistant inorganic adhesive, or nuts may be tightened using bolts such as stud bolts. In short, a latch member may be used to prevent the felt material from coming off at the tip. The contact holding means is not limited to this.

In the case of a steel frame column, this coated steel frame and an appropriate fixed small interval (because the shaking varies depending on the height of the building, based on the design value of the shaking depending on the height), 2 are set on the floor surface. Channel type, groove type steel such as angle, L type steel, T type steel, etc. are fixed with anchor bolts, etc. At both ends of this type steel, cushions such as felt and / or packing are bite and square type steel is vertically set and fixed. To do. Similar grooved steel is fixed to the upper floor of the ceiling to support square steel up and down. The square tubular shape connecting the outer sides of this square steel includes the coated steel frame inside, and maintains a constant void. Groove steel, L to reduce the overall weight
Light-duty steel can be used as the shape steel, square steel, etc., and extruded studs mainly made of cement, gypsum, etc., and wood-based square wood, etc. may be used. The cushioning body prevents the pillar material from buckling or damaging due to the shaking of the steel frame due to an earthquake or the like and the expansion of the pillar material due to heating, and it is a mat-like, felt-like or board-like thing made of inorganic fibers. Non-combustible resin or rubber can be used, but it is more preferably made of inorganic fiber.

The fixing means for the shape steel is easy to weld to the suspension bolt, but other fixing means such as bolting may be used. The pillar material is not limited to the square steel, and an angle material, a C-shaped material, or the like may be used so that the surface comes to the center or the outer surface of the rectangular tube. Attach a fireproof heat insulating plate to the outer surface of these four pillars,
Make sure that the coated steel frame is completely enclosed. As a mounting method, a fireproof heat insulating plate may be attached with a pin or a tapping screw having one end welded to a pillar material, a locking member such as a stud bolt, or may be adhered with a heat resistant inorganic adhesive, which is used together with them. May be.

The inorganic fiber heat insulating material wound directly on the steel frame means conventionally known rock wool, glass wool, ceramic fiber, or an inorganic fiber heat insulating material in which these are combined, and these are mats, felts or boards. preferable. Of course, a laminate of these may be used. The refractory heat insulating plate refers to a conventionally used one such as a calcium silicate plate and a gypsum board containing gypsum-based board fibers.

An embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a horizontal cross-sectional view in which a seismic isolation fireproof coating method of the present invention is applied to a column of a steel frame structure made of H-shaped steel, and the seismic isolation fire-resistant coating method of the present invention is horizontally cut at the bottom of the grooved steel. Figure 4
It is a perspective view of a portion in which a rectangular steel is erected by biting a buffer body at the end of the grooved steel. In FIG. 1, 1 is a steel frame, and 2 is a mat-shaped, felt-shaped, or board-shaped inorganic fiber heat insulating material. 3 is a pin for attaching the heat insulating material to the steel frame. Reference numeral 4 is a grooved steel, 7 is an anchor bolt for fixing the grooved steel, and 8 is a pillar material of square steel. Reference numeral 10 is a fireproof heat insulating plate.

[0016]

The present invention is characterized in that the fireproof coated steel frame and the fireproof heat insulating plate are not in close contact with each other, and a gap is provided therebetween. When a building shakes due to an earthquake or the like, the fireproof heat insulating plate is not directly attached to the through steel frame to which force is applied, and the fire resistant heat insulating plate is independent. It is light in weight overall, the force applied to the building is not directly applied, and the square steel and the fireproof insulation plate have a much similar specific gravity compared to the steel frame, and they shake together when shaking. The movement and the force applied to the mounting pins or the stud bolts can effectively prevent the fireproof heat insulating plate from being damaged or dropped.

[0017]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

(Example 1) A column made of H-shaped steel having the structure shown in FIG. 1 and a rock wool plate having a thickness of 50 mm and a density of 80 kg / m ³ (Thermboard manufactured by Nippon Steel Chemical Co., Ltd.) was used as a fire-resistant adhesive. (Asano Slate Co., Ltd. AS board N)
Around this, a square column with 50 mm of gypsum-based extruded column material (stud stud manufactured by Asano Slate Co., Ltd.) standing upright on both ends of two grooved steels (runner manufactured by Morimura Metal Co., Ltd.) was spaced apart from this. 8 mm thick fireproof insulation board (FG made by Asano Slate Co., Ltd.
The board N) was fixed and fireproofed. In addition, the fixation of the channel steel and the plaster-based extrusion molded pillar material is 25 mm in thickness and 4 in density.
Rock wool board of 0 kg / m ³ (manufactured by Nippon Steel Chemical Co., Ltd.)
The buffer of the (Sumboard) was used. This was subjected to a heating test by the fire resistance test method stipulated in Ministry of Construction Notification No. 2999, and as a result of measuring the temperature at 24 places, the time when the internal steel frame exceeded the allowable average temperature of 350 ° C was the standard for the fireproof coating. The value was 159 minutes, which was sufficiently higher than the fire resistant structure of 2 hours. At this time, the maximum allowable temperature of 450 ° C. was not reached.

(Examples 2 to 13 and Comparative Examples 1 to 3) In the structures shown in FIGS. 1 and 2, the combination of the fireproof heat insulating plate, the inorganic fiber heat insulating material, and the pillar material was replaced with the same as Example 1. The heating test was performed. The results are shown in Table 1, Table 2, Table 3, Table 4, Table 5, and Table 6.

[0020]

[Table 1]

[Table 2]

[Table 3]

[Table 4]

[Table 5]

[Table 6]

[0021]

EFFECTS OF THE INVENTION According to the fireproof coating method of the present invention, since the inorganic fiber felt, which is relatively weak against convective heat transfer of fire, is combined with the fireproof heat insulating plate having low air permeability, the fireproof heat insulating property is improved. Since the fireproof insulation board is not directly fixed to the covered steel frame but the pillars are independent by the shock absorber, it is excellent in vibration isolation so that it will not be damaged or fall out even if an earthquake or building shakes. Since the parts do not fall off, it is possible to maintain fire resistance without impairing the aesthetics of the building.

[Brief description of drawings]

FIG. 1 is a horizontal cross-sectional view in which a seismic isolation fireproof coating method of the present invention is applied to a column having a steel frame structure made of H-shaped steel, and is horizontally cut at a groove-shaped steel on the bottom surface.

FIG. 2 is a horizontal cross-sectional view in which a steel frame structure column made of die-cast steel is subjected to the vibration-isolating fireproof coating method of the present invention and is horizontally cut at the bottom of the L-shaped steel.

FIG. 3 is a horizontal cross-sectional view in which a beam having a steel frame structure made of H-shaped steel is subjected to the seismic isolation fireproof coating method of the present invention and vertically cut at the groove-shaped steel.

FIG. 4 is a perspective view of a portion in which a rock wool felt cushioning body is bitten on an end portion of the channel steel of FIG. 1 and a square steel is erected on the rock wool felt cushioning body.

FIG. 5 is a perspective view of a portion in which one of the L-shaped steels of FIG. 2 is centered, a cushioning body is bitten, and an extrusion-molded column is erected on the cushioning body.

FIG. 6 is a perspective view of a portion in which a T-shaped steel is used instead of the L-shaped steel of FIG. 2, the T-shaped steel is centered, a cushioning body is bitten, and an extrusion molded column is erected on the cushioned body.

FIG. 7 is a perspective view of a portion in which a shock absorber is bitten in the channel steel of FIG. 3, and square steel is erected below the buffer.

[Explanation of symbols]

1 Steel frame (H type, square type, O type) 2 Inorganic fiber insulation 3 Inorganic fiber heat insulating material mounting pin or fire resistant adhesive 4 Pillar material holding type steel material (groove type steel) 5 Pillar holding type steel (L type steel) 6 Pillar holding type steel material (T type steel) 7 Steel material fasteners 8 Pillars (square steel) 9 Pillars (extruded products) 10 Fireproof insulation board (FG-N etc.) 11 buffer 12 floor slabs

Claims (5)

[Claims] 1. When a steel frame such as a steel column or a steel beam is surrounded by a fireproof and heat-insulating plate, a heat insulating material mainly made of inorganic fibers is attached to the steel frame, and the steel frame is separated from the steel frame at a constant interval. , One end of the pillar can be supported, the shaped steel material longer than one side of the cross section of the steel frame is arranged on the floor surface on both sides of the cross section of the steel frame, and the lower ends of a plurality of pillar materials surrounding the steel frame are supported and fixed by the shaped steel material, A steel frame anti-vibration and fire-resistant coating method, characterized in that the upper end is fixed by a ceiling portion, and a fire-resistant heat insulating plate is attached to the outer side of the pillar material separately from the outer surface of the fire-resistant coated steel frame. 2. The vibration-isolated fireproof coating method for steel frame according to claim 1, wherein the die steel material is a lightweight channel steel material, and the pillar material is a lightweight C-type or square steel material. 3. The vibration-isolated fireproof coating method for steel frame according to claim 1, wherein the type steel material is a lightweight channel steel material or an L-shaped or T-shaped steel material, and the column material is an inorganic molding material such as cement or gypsum. 4. The vibration-isolated fireproof coating method for steel frame according to claim 1, wherein the shape steel material is a lightweight channel steel material or L-type or T-shape steel material, and the pillar material is a wood-based molding material. 5. The steel frame according to claim 1, wherein an inorganic heat insulating material is provided at an upper end of the pillar material and an inorganic heat insulating material and / or a resin or rubber cushioning body is provided at a lower end of the pillar material when fixing the pillar material to the shape steel material. Shake-resistant coating method.