JP3057387U - Fire-resistant structure of steel structure - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a fire-resistant covering structure of a steel structure capable of shortening construction time and minimizing deterioration of fire resistance. SOLUTION: A long refractory coating material 10 having a predetermined width is arranged along a length direction of a column 1 or a beam 2 constituting a steel structure, and the refractory coating material is folded in the width direction. The fireproof covering material is fixed to the pillars and beams by fixing members 5 by bending the pillars and beams.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a fire-resistant coating structure of a steel structure in which the surface of steel columns, beams and the like constituting a steel structure such as a warehouse or a multistory parking lot is coated to improve the fire resistance thereof. It is.

[0002]

[Prior art]

 Conventionally, in a warehouse as shown in FIG. 29 or a multi-story parking garage as shown in FIG. 30, a steel column 1 and a beam 2 are combined, and in the column 1, an outer wall material 3 (beam 2 In the case of (1), a large space is formed by mounting a floor slab to be mounted on the upper surface, and in order to improve the fire resistance of these steel columns 1 and beams 2, FIG. As shown in FIG. 36, these surfaces are coated with a refractory coating material 4.

In the related art, while pulling out the refractory coating material 4 wound in a roll shape, for example, as shown by an arrow in FIG. 34, in a direction orthogonal to the length direction of the column 1 or the beam 2. It is wound and cut in a state where it is pulled out to the required length, and is fixed as a fixing member to the refractory coating material 4 at both ends in the width direction (ends in the vertical direction in the figure) and a plurality of substantially intermediate portions in the width direction. The work of fixing the refractory coating 4 by piercing the pins 5 and welding these fixing pins 5 to the columns 1 and beams 2 is performed at a pitch slightly smaller than the width of the refractory coating 4. These columns 1 and beams 2 are covered over the entire length by sequentially performing them while being shifted in the length direction.

As shown in FIG. 31 and FIG. 34, joints are formed at many places in the longitudinal direction of the columns 1 and the beams 2, and the refractory coating 4 The cut portions 4a at both ends are positioned over the entire length on the side portions of the column 1 and the beam 2.

On the other hand, for example, when the beam 2 is formed of an H-shaped steel as shown in FIGS. 37 to 39 and FIG. 40, the refractory coating material 4 is attached to both ends of the pair of flange portions 2a. The beams 2 are laid so as to be bridged, and the beams 2 are covered with the pair of flange portions 2a floating from the web portion 2b connecting the flange portions 2a.

[0006]

[Problems to be solved by the invention]

 However, such conventional techniques have the following problems to be improved. That is, since the length of the column 1 or the beam 2 in the longitudinal direction is limited by the width of the refractory coating material 4, it is necessary to apply the coating over the entire length of the beam 1 or the column 2. The work area must be finely divided in the longitudinal direction of the pillars 1 and the beams 2 and each of the finely divided refractory coating materials 4 must be fixed by the fixing pins 5. This is a problem that the period is prolonged and the number of parts used such as the fixing pins 5 is increased. Such problems are inconvenient in terms of security, because construction work on steel structures with large spaces, such as warehouses and multistory parking lots, is performed at high places.

As shown in FIG. 34, when an overhang 6 exists in the middle of the column 1 or the beam 2, a predetermined position of the refractory coating 4 is placed at a predetermined position of the refractory coating 4 in order to avoid the overhang 6. As shown in FIG. 5, it is necessary to cut out a hole H having substantially the same cross-sectional shape as that of the projection 6 and to form a cut L for opening the hole H in order to insert the overhang 6 into the hole H. There is. However, since the coating position of the refractory coating material 4 to be coated is regulated in relation to the other refractory coating materials 4, the position where the hole H is formed is set with respect to the outer shape of the refractory coating material 4. It must be set with high accuracy, the forming operation becomes complicated, and the provision of the cut L increases discontinuous portions, that is, gaps, in the refractory coating material 4, and as a result, the refractory performance deteriorates. There is also a problem that is expected.

Further, since a large number of joints are formed in the length direction of the columns 1 and the beams 2, when the projections 7 are present on the surfaces of the columns 1 and the beams 2 as shown in FIG. The frequency at which the joint 7 of the object 7 and the joint of the refractory coating material 4 are superimposed increases, whereby there is a possibility that the refractory coating material 4 is turned up by the protrusions 7 to form a gap, thereby deteriorating the fire resistance performance. .

Further, since the refractory coating material 4 is wound around the pillar 1 or the beam 2 in the circumferential direction and cut at the side of the pillar 1 or the beam 2, the cut portion 4 a becomes uneven. It also has the disadvantage that it is easy to look bad.

[0010] On the other hand, in the case of coating in a state of being floated from the web portion 2b of the H-section steel, the refractory coating material 4 in the floating portion is easily damaged. Since there is no backing, it is impossible to fix the damaged part. Therefore, in order to repair the damaged part, it is necessary to replace the entire damaged fireproof coating material 4, and the repair work becomes complicated.

[0011] The present invention has been made in view of such a conventional problem, and it is intended to shorten the construction time and reduce the deterioration of the fire resistance of the steel structure to a minimum. It is intended to provide a structure.

[0012]

[Means for Solving the Problems]

 The fire-resistant coating structure for a steel structure according to claim 1 of the present invention has a structure in which a long fire-resistant coating material having a predetermined width is arranged along a length direction of a column or a beam constituting the steel structure. The fire-resistant coating is bent in the width direction to cover the columns and beams, and the fire-resistant coating is fixed to the columns and beams by a fixing member.

According to a second aspect of the present invention, in the fire-resistant coating structure for a steel structure, the pillar or the beam according to the first aspect is formed of a square steel pipe, and an outer wall material or a floor slab is mounted on one surface thereof. The fire-resistant coating material is disposed so as to cover the gap between the three surfaces of the pillar or the beam to which the outer wall material or the floor slab is not attached, and both sides of the pillar or the beam and the outer wall material or the floor slab. It is characterized by having been done.

According to a third aspect of the present invention, in the fire-resistant covering structure for a steel structure, the fire-resistant covering material according to the second embodiment is provided on three sides of the pillar or the beam on which the outer wall material or the floor slab is not mounted. It is characterized by comprising a first refractory covering material to cover, and a pair of second refractory covering materials for covering a gap between both sides of the first refractory covering material and the outer wall material or the floor slab. I do.

According to a fourth aspect of the present invention, in the fire-resistant coating structure for a steel structure, the column and the beam according to the first aspect are made of H-shaped steel, and an outer wall material or a floor slab is fixed to one flange portion. The fire-resistant coating material is wound along a surface of the pillar or beam other than the surface on which the outer wall material or the floor slab is mounted, and a gap between the one flange portion and the outer wall material is provided. Characterized by being disposed so as to cover

According to a fifth aspect of the present invention, in the fire-resistant covering structure for a steel structure, the fire-resistant covering material according to the fourth aspect is divided into two parts so as to cover approximately half of the surfaces of the columns and beams. It is characterized in that the refractory coating material is superimposed on the surface of the other flange portion.

In the fire-resistant covering structure for a steel structure according to a sixth aspect, the fire-resistant covering material according to the fourth aspect may be configured such that a gap between one side of the one flange portion and the outer wall material or the floor slab is provided. And a pair of first refractory coatings that cover each surface of the web portion from one inner surface of one flange, and are disposed so as to cover the entire surface of the other flange portion. And a second refractory coating material superimposed on each of the first refractory coating materials.

In the fire-resistant covering structure for a steel structure according to a seventh aspect, the fire-resistant covering material according to the fourth aspect may be configured such that a gap between each side of the one flange portion and the outer wall material or the floor slab is provided. And a pair of first refractory covering materials for the flange covering each inner surface of one flange, a pair of refractory covering materials for the web covering each surface of the web portion, and covering the entire surface of the other flange portion. And the pair of web refractory coating materials are provided at both ends of the first and second flange refractory coating materials. It is characterized by being superimposed on the refractory coating material.

The fireproof structure of a steel structure according to claim 8 is configured such that the fireproof material is divided and wound around the column according to any one of claims 1 to 7 in a vertical direction, The upper end of the refractory covering material disposed in the upper part is overlapped above the lower end of the refractory covering material disposed above.

[0020]

[Embodiment of the invention]

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, portions common to the related art will be denoted by the same reference numerals, and the description will be simplified.

The fire-resistant coating structure of a steel structure according to the present embodiment is configured such that a fire-resistant coating material 4 wound in a roll shape is formed along a length direction of a column 1 or a beam 2 as indicated by an arrow in FIG. While pulling it out, it is wound around the surface of these pillars 1 and beams 2, and the fixing pins 5 are pierced into predetermined positions of the wound refractory coating 4, and these fixing pins 5 are attached to the pillars 1 and beams 2. The column 1 and the beam 2 are coated over the entire length of the column 1 and the beam 2 by welding.

More specifically, based on the method of applying the refractory coating material, as shown in FIGS. 3 and 4, first, a narrow second refractory coating material 10 is attached to one side of the column 1 and the outer wall material. 3 is laid along the length of the column 1 and the column 1 and the external wall 3 so as to cover the gap between the external wall 3 and the column 1, A plurality of pins 5 are pierced into a portion of the second refractory coating material 10 that overlaps with the column 1, and these pins 5 are welded to the side surfaces of the column 1, as shown in FIGS. 5 and 6. The narrow second refractory coating 10 is fixed to one side of the column 1.

Next, as shown in FIG. 7 and FIG. 8, a similar narrow second refractory covering material 10 is provided at the intersection between the other side of the column 1 and the outer wall material 3 in the longitudinal direction thereof. After being laid along the pillar 1 and the outer wall material 3 in a state of being overlapped by a predetermined length, a plurality of pins 5 are pierced into a portion of the second refractory coating material 10 overlapping the pillar 1. By welding these pins 5 to the side surfaces of the column 1, the narrow second refractory coating 10 is fixed to the other side of the column 1 as shown in FIGS. 9 and 10.

Thus, as shown in FIGS. 11 and 12, a wide first refractory covering material 11 is laid on the outer end surface of the column 1 along the length direction thereof, and After bending both sides of the covering material 11 toward both sides of the pillar 1 and superimposing these side edges on the overlapping portions of the second refractory covering material 11 and the pillar 1, FIG. As shown in FIG. 14, a fixing pin 5 is pierced into a portion of the first refractory coating material 11 along the outer end surface of the column 1 and these fixed pins 5 are welded to the outer end surface of the column 1. Thereby, the first refractory coating material 11 is temporarily fixed.

Further, as shown in FIGS. 15 and 16, and FIGS. 1 and 2, both sides of the first refractory coating material 11 are fixed to portions overlapped with the second refractory coating materials 11. The fixing pins 5 are welded to the column 1 while the pins 5 are pierced. By these operations, the column 1 is covered over an arbitrary distance in the longitudinal direction.

Then, the new refractory coating materials 10 and 11 are abutted against the ends of the previously coated refractory coating materials 10 and 11 or are slightly overlapped above them, and By repeating the operation, as shown in FIGS. 17, 18, and 19, the entire length of the column 1 can be covered.

Here, each of the refractory coating materials 10 and 11 is drawn out and covered in a necessary length in the longitudinal direction of the column 1, and the amount of the drawn out can be set arbitrarily. The number of divisions of the refractory coating materials 10 and 11 in the length direction is greatly reduced, and accordingly, the number of fixing pins 5 required for fixing these materials can be reduced, so that material costs can be reduced. And simplification of the operation.

Further, the position of the joint (ie, the joint position) can be arbitrarily set by adjusting the length of the refractory coating materials 10 and 11, and thus, as shown in FIG. Even when the projections 7 are present, the refractory coatings 10 and 11 can be covered so as to cover the projections 7, whereby the joint between the joints of the refractory coatings 10 and 11 and the projections 7 can be formed. The overlap can be avoided to prevent the refractory coating materials 10 and 11 from being turned up, and the joint performance can be reduced, so that a decrease in the fire resistance performance can be prevented.

Moreover, since the width of each of the refractory coating materials 10 and 11 is constant, each side portion of each of the refractory coating materials 10 and 11 becomes straight and has a good appearance after construction. In this case, the upper end portions of the lower refractory coating materials 10 and 11 are slightly overlapped above the lower end portions of the upper refractory coating materials 10 and 11 so that the cut portions 10a of the lower refractory coating materials 10 and 11 are formed. -11a can no longer be visually recognized from below, and a decrease in aesthetic appearance can be suppressed.

On the other hand, as shown in FIG. 21, for example, when there is an overhang 6 in the middle of the pillar 1, the refractory coating material 11 that is coated from one side of the overhang 6 is attached to the overhang. As shown in FIG. 22, a hole 12 having the same shape as the cross-sectional shape of the overhang 6 is formed at the abutting portion of the refractory coating material 11 which is covered to a position where it abuts on one end surface of the overhang 6 as shown in FIG. The overhang 6 is formed so as to be opened at the edge to be joined, and the overhang 6 is located in the hole 12 and the other refractory coating material 11 is covered to avoid the overhang 6. Thus, the two refractory coating materials 11 can be abutted or superposed. In this case, it is not necessary to form unnecessary cuts or the like in each of the refractory coating materials 11, and it is possible to suppress a decrease in fire resistance performance due to turning up or the like. In addition, when the hole 12 is formed, its position is restricted only in the width direction of the refractory coating material 11, so that the position can be easily set.

Next, another embodiment of the present invention will be described with reference to FIGS. 23 and 24. The present embodiment shows a fire-resistant coating structure in the case where the beam 2 is formed by using an H-section steel. One fire-resistant coating material 20 is used, and the fire-resistant coating material 20 is drawn out in the length direction of the beam 2. After that, the refractory coating material 20 is bent so as to make surface contact with the inner surfaces of both flange portions 2a of the beam 2 and both side surfaces of the web portion 2b. The coating material 20 is fixed to both flange portions 2a and web portions 2b by a plurality of fixing pins 5.

In this embodiment, all of the parts of the refractory coating material 20 are backed by the beams 2 so that they are not easily damaged. As shown in (1), since the broken portion S can be fixed to the beam 2 by the pin 5, the repair is simple and partial repair is sufficient, and the cost for repair can be suppressed.

FIGS. 23 and 24 show an example in which one refractory coating material 20 is used when the refractory coating material 20 is coated on the beam 2 made of the H-shaped steel. 27, the beam 2 may be covered from both sides by using two refractory covering materials 21 and 22, and as shown in FIG. The pair of first refractory coating materials 23 and 24 covering one side surface of the web portion 2b and the second refractory coating material 25 covering the entire surface of the other flange portion 2a can be divided and covered. As shown in FIG. 28, a pair of first refractory coating materials 26 for the first flange cover the gaps between the respective side portions of the one flange portion and the outer wall material or the floor slab, and cover the inner surfaces of the one flange. .27 for a pair of webs covering each side of the web One side and the other side of one flange portion 2a and the web portion 2b, using the fire-resistant coating materials 28 and 29 and the second fire-resistant coating material 30 for a flange disposed over the entire surface of the other flange portion. It is also possible to divide and cover each side surface and the entire surface of the other flange portion 2a.

The various shapes, dimensions, and the like of the constituent members shown in the above-described embodiment are merely examples, and can be variously changed based on design requirements and the like.

[0035]

[Effect of the invention]

 As described above, according to the present invention, each refractory coating material is drawn out and covered in the length direction of the column or beam in a necessary amount, so that the drawn-out amount can be set arbitrarily. The number of divisions of the refractory cladding in the length direction of the columns and beams can be significantly reduced, and the number of fixing means such as fixing pins required for fixing them can be reduced, thereby reducing construction costs. In addition, the operation can be simplified.

Further, since the position of the seam can be arbitrarily set by adjusting the length of the refractory coating material, the splice of the refractory coating material can be performed even when there are projections on the surfaces of the columns and beams. The overlap between the eyes and the projections can be avoided to prevent the refractory coating material from being turned up, and also to reduce the number of seams, thereby preventing a decrease in fire resistance performance.

In addition, since the width of the refractory coating is constant, each side of the refractory coating is straight after the construction, and the appearance is good. By slightly overlapping the portion above the lower end of the upper refractory coating material, the cut portion of the lower refractory coating material can no longer be seen from below, and the appearance can be prevented from deteriorating.

In addition, the refractory coating is bent in accordance with the cross-sectional shape of the column or the beam so that the refractory coating is brought into surface contact with the surface of the column or the beam. Therefore, all parts of the refractory cladding are backed up with columns and beams to make it difficult to break, and even if damaged, the damaged parts can be fixed to the columns and beams. Restoration is simple and only partial restoration is required, and the cost for restoration can be reduced.

[Submission date] October 5, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

[Prior art]

Conventionally, in a warehouse as shown in FIG. 29 or a multistory parking lot as shown in FIG. 30, a steel column 1 and a beam 2 are combined, and in the column 1, an outer wall material 3 (beam 2 In the case of (1), a large space is formed by attaching a floor slab to be mounted on the upper surface, and in order to improve the fire resistance of these steel columns 1 and beams 2, FIG. 40 , these surfaces are coated with a refractory coating material 4.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is a front view of a main part showing one embodiment of the present invention.

FIG. 3 is a cross-sectional view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 4 is a front view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 6 is a front view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 8 is a front view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 9 is a cross-sectional view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 10 is a front view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 11 is a cross-sectional view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 12 is a front view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 13 is a cross-sectional view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 14 is a front view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 15 is a cross-sectional view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 16 is a front view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 17 is a cross-sectional view of a main part showing a construction procedure according to the embodiment of the present invention.

FIG. 18 is a front view of a main part showing a construction procedure according to an embodiment of the present invention.

FIG. 19 is an external perspective view of a main part showing one embodiment of the present invention.

FIG. 20 is a cross-sectional view illustrating an embodiment of the present invention, in which a protrusion existing on the surface of a column or a beam and a refractory coating material are engaged with each other.

FIG. 21 is a cross-sectional view showing an embodiment of the present invention, in which a protrusion existing on the surface of a pillar or a beam and a refractory coating material are engaged with each other.

FIG. 22 shows an embodiment of the present invention and is a front view of a main part of a fireproof covering material.

FIG. 23 is a cross-sectional view of a main part showing another embodiment of the present invention.

FIG. 24 is a front view of a main part showing another embodiment of the present invention.

FIG. 25 is an external perspective view of another embodiment of the present invention, in which a part of a main part is cut away.

FIG. 26 is a cross-sectional view showing another embodiment of the present invention.

FIG. 27 is a cross-sectional view showing another embodiment of the present invention.

FIG. 28 is a cross-sectional view showing another embodiment of the present invention.

FIG. 29 is an external perspective view showing one structural example of a steel frame structure on which a fireproof covering material is applied.

FIG. 30 is an external perspective view showing another example of the structure of the steel frame structure on which the fireproof covering material is applied.

FIG. 31 is an external perspective view of a main part showing a conventional example.

FIG. 32 is a cross-sectional view of a main part showing one conventional example.

FIG. 33 is a front view of a main part showing one conventional example.

FIG. 34 is an external perspective view of a main part showing one conventional example.

FIG. 35 shows a conventional example, and is a front view of a main part of a fireproof covering material.

FIG. 36 shows a conventional example, and is a cross-sectional view showing a state in which projections present on the surfaces of columns and beams and a refractory coating material are engaged.

FIG. 37 is a cross-sectional view of a main part showing another conventional example.

FIG. 38 is a front view of a main part showing another conventional example.

FIG. 39 is an external perspective view of a main part of another conventional example with a part cut away.

FIG. 40 is an external perspective view of a main part of another conventional example with a part cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Column 2 Beam 2a Flange part 2b Web part 3 Outer wall material 4 Fireproof covering material 4a Cutting part 5 Fixing pin 6 Overhang 7 Projection 10 Second fireproof covering material 10a Cutting part 11 First fireproof covering material 11a Cutting part 12 Hole 20 Fireproofing material 21 Fireproofing material 22 Fireproofing material 23 First fireproofing material 24 First fireproofing material 25 Second fireproofing material 26 First fireproofing material for flange 27 First fireproofing material for flange Covering material 28 Fireproofing material for web 29 Fireproofing material for web 30 Fireproofing material for second flange H Hole L Cut S Breakage

Claims (8)

[Utility model registration claims] 1. A long fire-resistant coating material having a predetermined width is arranged along a length direction of a column or a beam constituting a steel structure, and the fire-resistant coating material is bent in the width direction. A fire-resistant covering structure for a steel frame structure, wherein the fire-resistant covering material is fixed to the column or beam by a fixing member. 2. The column or beam is formed of a square steel pipe, and an outer wall material or a floor slab is attached to one surface thereof, and the fire-resistant coating material is the outer wall material or the floor slab of the column or beam. The fire-resistant coating of a steel structure according to claim 1, wherein the steel frame structure is provided so as to cover gaps between three surfaces on which no pillar is attached and both side portions of the pillar or the beam and an outer wall material or a floor slab. Construction. 3. The first fire-resistant covering material covers three surfaces of the pillar or the beam, on which the outer wall material and the floor slab are not mounted, and both sides of the first fire-resistant covering material. The fire-resistant coating structure for a steel structure according to claim 2, comprising a pair of second fire-resistant coating materials covering a gap between the outer wall material and the floor slab. 4. The pillar or beam is made of H-shaped steel, and an outer wall material or a floor slab is fixed to one flange portion, and the fire-resistant coating material is the outer wall material or floor of the pillar or beam. 2. The device according to claim 1, wherein the plate is wound along a surface other than the surface on which the plate is mounted, and is disposed so as to cover a gap between the one flange portion and an outer wall material. 3. Fire-resistant coating structure for steel structures. 5. The method according to claim 1, wherein the refractory coating is divided into two parts so as to cover about half of the surface of the column or the beam, and these refractory coatings are overlapped on the surface of the other flange. The fire-resistant covering structure of a steel structure according to claim 4, characterized in that: 6. The fire-resistant covering material covers a gap between one side of the one flange portion and the outer wall material or the floor slab,
A pair of first refractory coatings covering one side inner surface of one flange from the inner surface of each of the web portions; and a pair of first refractory coating materials disposed over the entire surface of the other flange portion, and the first refractory coating material on both sides. The fire-resistant coating structure for a steel structure according to claim 4, comprising a second fire-resistant coating material superimposed on the coating material. 7. The fire-resistant covering material covers a gap between each side of the one flange portion and the outer wall material or the floor slab,
Also, a pair of first flange refractory coating materials covering each inner surface of one flange, a pair of web refractory coating materials covering each surface of the web portion, and a whole surface of the other flange portion are disposed. And the second pair of refractory cladding materials for the web,
The fire-resistant covering structure for a steel structure according to claim 4, wherein each of the two end portions is overlapped with each of the first and second fire-resistant covering materials for flanges. 8. The fire-resistant coating material is wound around the pillar by dividing the fire-resistant coating material in the vertical direction, and the upper end of the fire-resistant coating material provided below is connected to the lower end of the fire-resistant coating material provided above. The fire-resistant covering structure for a steel structure according to any one of claims 1 to 7, wherein the structure is overlapped upward.