CN1694992A - Bearing wall and steel structure house using it - Google Patents

Abstract

An inexpensive load bearing wall (1) capable of providing an excellent shearing strength and sufficiently absorbing vibration energy and a steel house using the load bearing wall, the load bearing wall (1) comprising a steel frame body (2) formed by framing shape steels (21) in rectangular shape and a structural surface material (3) fixed to the steel frame body (2), the structural surface material (3) further comprising a cement board provided by dispersing a cement based inorganic material, a silica containing-material, light-weight aggregate, and reinforcing fibers into water to form slurry, molding and dewatering the slurry to form a monolayer mat, winding the monolayer mat on a making roll by multiple layers until the thickness thereof becomes a specified thickness to form a laminated mat, cutting off the laminated mat from the making roll, and press-forming the laminated mat to manufacture a press mat, and curing the press mat.

Description

Bearing wall and steel structure house using it

technical field

The present invention relates to a load-bearing wall (supporting wall) composed of a steel structure frame formed by framing section steel into a rectangular shape, and a structural surface material fixed to the steel structure frame, and a steel structure room (スチ- luhouse).

Background technique

Conventionally, there has been a load-bearing wall composed of a steel structure frame formed by framing section steel in a rectangular shape, and a structural surface material fixed to the steel structure frame (see JP-A-2001-55807).

That is, this load-bearing wall is formed by using light-gauge thin-plate steel for the frame body of the wall structure obtained by the usual frame structure wall construction method (2×4 construction method). In addition, as a structural surface material, a wood composite board with a thickness of about 9 mm is generally used.

In addition, such a load-bearing wall constitutes a steel structure room.

However, when it is required to increase the strength of the load-bearing wall in a building where the load-bearing wall cannot be sufficiently arranged, there is a problem that it is difficult to obtain sufficient earthquake resistance characteristics of the load-bearing wall using the above-mentioned wood composite board. That is, it is difficult to obtain a shear structure that satisfies the primary design (allowable stress intensity design) for medium-scale earthquakes and the secondary design (intrinsic yield strength design) for large-scale earthquakes specified in the Building Standards Act. shear strength properties.

The above-mentioned primary design is a design that does not damage the load-bearing wall due to a moderate-scale earthquake, and the above-mentioned secondary design is a design that absorbs vibration energy during a large-scale earthquake to prevent the collapse of the building.

That is, shear strength and vibration energy absorption are required.

In addition, the values required for the primary design and the secondary design differ depending on various conditions. The value required for the primary design is determined by the shape and layout conditions of the building. The value required for the secondary design is governed by the characteristics of the structural surface material itself. In addition, when using a surface material that has the characteristics of substantially no significant increase or decrease in yield strength after yielding of the structural surface material, and sufficiently deformed (shear deformation angle 0.03 rad) after the surface material yields , the value of the 2-time design is about 1.5 times the value of the 1-time design.

That is, when a surface material having such characteristics is used, for example, as shown in FIG. The values shown are the values required for the primary design and the secondary design, respectively (refer to Example 3).

However, when a wood composite board is used as the above-mentioned structural surface material, the required value of the secondary design increases to about 2.0 times the value of the primary design, and it is necessary to satisfy this requirement.

Therefore, by constituting the load-bearing wall with a wooden composite board whose thickness is increased to 12 mm, the above-mentioned first-order design and second-order design can be satisfied. However, at this time, although the maximum yield strength of the load-bearing wall increases, it is necessary to have a steel structure frame, tie bolts, and foot plates that can fully withstand the load equivalent to the maximum yield strength. Fixing parts such as metal parts, etc. This is because the Building Standards Act regulates the strength of the frame, the fixing member, and the like corresponding to the maximum yield strength of the structural surface material. In this case, therefore, there arises a problem affecting cost increase.

Therefore, as the load-deformation curve of the above-mentioned load-bearing wall, as shown in the curve L0 of FIG. As for the deformation curve, a curve in which the required value of the above-mentioned secondary design is not too large (about 1.5 times the required value of the primary design) is ideal. Hereinafter referred to as "ideal curve".

On the contrary, by realizing a load-deformation curve close to this ideal curve, securing of shear strength, securing of vibration energy absorbability, and cost reduction can be achieved.

Contents of the invention

The present invention was developed in view of the aforementioned conventional problems, and an object of the present invention is to provide an inexpensive load-bearing wall that is excellent in shear strength and can sufficiently absorb vibration energy, and a steel structure building using the same.

The first invention is a load-bearing wall, which is a load-bearing wall composed of a steel structure frame formed by combining steel frames into a rectangle, and a structural surface material fixed on the steel structure frame; it is characterized in that , the surface material for the above structure is made of cement board, wherein the cement board is prepared by dispersing cement-like inorganic materials, silicic acid-containing substances, lightweight aggregates and reinforcing fibers in water to make mud, and the mud Making and dehydrating to form a single-layer sheet, winding the single-layer sheet on the manufacturing drum, stacking multiple layers until it reaches a specified thickness to form a laminated sheet, cutting the laminated sheet from the above-mentioned manufacturing drum, and extruding It is obtained by pressing and forming an extruded plate, and then hardening and curing the extruded plate (technical scheme 1).

Next, the effects of the present invention will be described.

Since the above-mentioned structural face material is mixed with the above-mentioned lightweight aggregate and reinforcing fibers in the raw material, the strength of each of the above-mentioned single-layer panels can be increased.

In addition, the above-mentioned structural surface material can be obtained by forming a laminated sheet obtained by laminating single-layer sheets as described above. That is, since the above-mentioned structural face material is formed in a layered form, it is excellent in shear strength and toughness.

In this way, the above-mentioned structural face material composed of the cement board obtained by using the above-mentioned raw materials and methods has sufficient toughness while having sufficient shear strength.

The above-mentioned load-bearing wall has sufficient shear strength and toughness because the structural face material excellent in shear strength and toughness is fixed to the steel structure frame. And because of good toughness, the load-bearing wall can be greatly deflected, and can fully absorb the input vibration energy.

In addition, the structural surface material composed of the above-mentioned cement board can be adjusted to a sufficient and necessary maximum yield strength by, for example, appropriately adjusting the number of laminations and the thickness of the lamination sheets when forming the above-mentioned laminated sheets. That is, the maximum yield strength can be prevented from being excessively increased, and the necessity of extremely increasing the strength of the above-mentioned steel structure frame, tie bolts, and fixtures such as leg metal fittings can be prevented. Thus, inexpensive load-bearing walls and constructed bodies can be obtained.

In addition, according to the above configuration, the load-deformation curve of the load-bearing wall can also obtain a curve similar to the above-mentioned ideal curve (see curve L0 in FIG. 11 ) (see Example 3). In particular, the load-deformation curve of the load-bearing wall can be made closer to the above-mentioned ideal curve by properly adjusting the number of laminations during the formation of the above-mentioned laminated plates.

As described above, according to the present invention, it is possible to provide an inexpensive load-bearing wall that is excellent in shear strength and can sufficiently absorb vibration energy.

The second invention is a steel structure house, which has a steel structure frame composed of rectangular steel frames combined and a load-bearing wall made of structural surface materials fixed on the steel structure frame. Structural house; it is characterized in that the surface material for the above structure is made of cement board, wherein the cement board is prepared by dispersing cement-like inorganic materials, substances containing silicic acid, lightweight aggregate and reinforcing fibers in water to make mud , the mud is made and dehydrated to form a single-layer sheet, the single-layer sheet is wound on the manufacturing drum, and multiple layers are stacked until it becomes a specified thickness to form a laminated sheet, and the laminated sheet is removed from the above-mentioned manufacturing drum Cut off, carry out extrusion molding and make extruded sheet, obtain this extruded sheet hardening maintenance again (technical scheme 2).

This steel structure house is composed of load-bearing walls that can realize a load-deformation curve similar to the above-mentioned ideal curve (curve L0 in FIG. 11 ) (refer to Example 3).

Description of drawings

FIG. 1 is a front view of a load-bearing wall of Embodiment 1. FIG.

FIG. 2 is a side view of the load-bearing wall of Embodiment 1. FIG.

3 is a top view of the load-bearing wall of Embodiment 1.

Fig. 4 is a front view of the steel structure frame of the first embodiment.

Fig. 5 is a side view of the steel structure frame of the first embodiment.

Fig. 6 is a sectional view taken along line A-A of Fig. 4 .

7 is an explanatory diagram of a flow on (floon) type papermaking machine (papermaking machine) of Example 1.

FIG. 8 is a perspective view of a part of the steel structure house in Embodiment 1. FIG.

FIG. 9 is an explanatory diagram of a heack (Hachietsu) type papermaking machine of Example 2. FIG.

FIG. 10 is an explanatory diagram of a shear tester in Example 3. FIG.

11 is a graph showing the in-plane shear strength properties of various load bearing walls of Example 3. FIG.

Detailed ways

In the first invention (invention 1) or the second invention (invention 2), as the section steel, for example, a light-gauge steel sheet using a thin plate with a thickness of 0.8 to 1.6 mm can be used.

In addition, the above-mentioned cement-based inorganic materials are made of one or two or more selected from, for example, Portland cement, blast furnace slag cement, soot cement, pozzolan (silica) cement, alumina (high alumina) cement, white cement, etc. composed of various.

The above-mentioned silicic acid-containing substance is composed of one or two or more selected from, for example, slag, soot, silica sand, silica powder, microsilica fume, diatomaceous earth, and the like.

The above-mentioned lightweight aggregate is composed of one or two or more selected from, for example, perlite, vermiculite, white sandy porous material (Silas Ball), and crushed waste materials of cement boards.

The above-mentioned reinforcing fiber is a synthetic reinforcement selected from, for example, wood pulp (NUKP, NBKP, LUKP, LBKP, etc.), wood flour, wood fiber bundles, etc. Fiber, sepiolite, wollastonite and other mineral-reinforced fibers, or two or more.

In addition, when making the above-mentioned mud, in addition to the above-mentioned cement-based inorganic materials, silicic acid-containing substances, lightweight aggregates, and reinforcing fibers, hardening accelerators such as calcium formate, aluminum sulfate, etc., paraffin, yellow wax, surface Dispersion of water repellents such as active agents and drainage agents (water repellents).

In addition, the solid content concentration (solid content) of the slurry is preferably 5 to 20% by mass. Accordingly, a predetermined thickness of the laminated sheet can be efficiently obtained. When the concentration is less than 5% by mass, the thickness of the single-layer sheet is too thin, and multiple layers must be laminated until the predetermined thickness is reached, which may lower production efficiency. On the other hand, when it exceeds 20% by mass, the thickness of the single-layer sheet may be too thick, dehydration efficiency may be reduced, and the close contact property of the lamination interface may be reduced.

In addition, the above-mentioned structural face material preferably has a thickness of, for example, 10 to 15 mm, a specific gravity of 0.8 to 1.1, and a bending strength of 8 to 14 N/mm ² . In addition, the above-mentioned laminated sheet is preferably formed by laminating 5 to 10 of the above-mentioned single-layer sheets.

Example 1

A load-bearing wall according to an embodiment of the present invention and a steel structure building using the same will be described with reference to FIGS. 1 to 8 .

Above-mentioned bearing wall 1, as shown in Fig. 1～Fig. 3, comprises steel structure frame body 2 (Fig. Surface material 3.

The above-mentioned structural surface material 3 is composed of a cement board obtained as follows.

First, cement-like inorganic materials, silicic acid-containing substances, lightweight aggregates, and reinforcing fibers are dispersed in water to make slurry 41 . As shown in FIG. 7 , the slurry 41 is machined and dehydrated to form a single-layer sheet. This single-layer sheet is wound on the production drum 51 , and laminated in multiple layers until reaching a predetermined thickness, whereby the laminated sheet 43 is formed. This laminated sheet 43 is cut out from the production drum 51 described above. The laminated sheet 43 is extruded to produce an extruded sheet, and the extruded sheet is hardened and maintained.

Thereafter, by performing external shape processing and the like, the structural face material 3 composed of the above-mentioned cement board is obtained.

In addition, as the above-mentioned shaped steel 21 , thin-plate lightweight steel using a thin plate with a thickness of about 1.0 mm is used. And, as shown in Fig. 5 and Fig. 6, as the vertical material 211 in the vertical direction of the above-mentioned steel structure frame body 2, a C-shaped steel with a substantially C-shaped cross section is used, and as the horizontal material 212 in the left-right direction, a substantially U-shaped steel with a cross-sectional shape is used. thin steel.

In addition, as shown in Fig. 4 and Fig. 6, on the left and right sides of the above-mentioned steel structure frame body 2, a structure formed by overlapping the backs of two longitudinal materials 211 (C-shaped steel) and then fixing them with small screws 11 is provided respectively. . In addition, a foot support plate 23 for fixing the load-bearing wall 1 on its fixing base is fixed on the inner side below the left and right vertical materials 211 .

In addition, a vertical material 211 (C-shaped steel) is disposed substantially at the center in the left-right direction of the above-mentioned steel structure frame body 2 .

In addition, as shown in FIG. 5 , on the upper side and the lower side of the steel frame body 2 , the horizontal members 212 (channel steel) are respectively arranged so that their opening faces face each other. In addition, the horizontal material 212 and the above-mentioned vertical material 211 are fixed together with screws 11 .

As shown in FIGS. 1 to 3 , the load-bearing wall 1 is obtained by fixing the above-mentioned structural surface material 3 on one side of the above-mentioned steel frame body 2 . That is, the structural face material 3 having substantially the same shape as the outer shape of the above-mentioned steel structure frame body 2 is fixed to the above-mentioned steel structure frame body 2 with screws 12 .

Next, a method of manufacturing the above-mentioned structural surface material 3 will be described.

That is, first, 35% by mass of Portland cement as the above-mentioned cement-based inorganic material, 25% by mass of slag and 10% by mass of soot as the above-mentioned silicic acid-containing substance, 10% by mass of perlite as the above-mentioned lightweight aggregate, 10% by mass of wood pulp as the above-mentioned reinforcing fiber and 10% by mass of waste (reject) as a lightweight aggregate were mixed.

This raw material mixture was dispersed in water to prepare a slurry 41 having a solid content (content) of about 12% by mass.

This slurry 41 is dropped into the raw material box 52 of the flow on type papermaking machine 5 shown in FIG. 7 . This papermaking machine 5 has the above-mentioned production drum 51, a raw material flow generation box (raw material flow box) 56, an air suction box 57, and the above-mentioned production drum 51 and one side passes under the above-mentioned raw material flow generation box 56 and the above-mentioned suction box. The upper side of 57 is looped felt 55 .

The slurry 41 thrown into the raw material tank 52 is supplied to the raw material flow generation tank 56 , and flows onto the felt 55 from the raw material flow generation tank 56 . The mud 41 flowing onto the felt 55 is dehydrated by being sucked by the above-mentioned suction box 57 . As a result, a single-layer sheet consisting of thin raw material layers is formed on the felt 55 .

The single-layer panels formed on the felt 55 in this manner are stacked on the production drum 51 by being wound, thereby forming the laminated panels 43 . Then, when seven layers of the single-layer panels are stacked, they are cut and unfolded by a cutter 59 , and the above-mentioned laminated panels 43 are cut off from the production drum 51 . Thereafter, the laminated sheet 43 is extruded to produce an extruded sheet.

The extruded sheet is hardened and cured for 7-30 hours under the conditions of 50-80° C. and humidity 90-100 RH.

Thereafter, by performing external shape processing, the structural surface material 3 composed of the above-mentioned cement board is obtained. The surface material 3 for this structure has a thickness of 10-15 mm, a specific gravity of 0.8-1.1, and a bending strength of 8-14 N/mm ² .

In addition, as shown in FIG. 8 , a steel structure room 6 can be constructed by using a plurality of the load-bearing walls 1 described above and assembling them.

Next, the operation and effect of this example will be described.

Since the above-mentioned structural face material 3 is mixed with the above-mentioned lightweight aggregate and reinforcing fibers in the raw material, the strength per one layer of the above-mentioned single-layer panel can be increased.

In addition, the above-mentioned structural surface material 3 can be obtained by forming a laminated sheet in which single-layer sheets are laminated as described above. That is, the above-mentioned structural face material 3 has excellent shear strength and toughness because it is formed in a layered shape.

In this way, the above-mentioned structural face material 3 composed of a cement board obtained by using the above-mentioned raw materials and methods has sufficient toughness as well as sufficient shear strength.

The above-mentioned load-bearing wall 1 is formed by fixing the structural face material 3 excellent in shear strength and toughness to the above-mentioned steel frame body 2, and thus has sufficient shear strength and toughness. And because of its excellent toughness, the above-mentioned load-bearing wall 1 can be greatly deflected, and can fully absorb the input vibration energy.

In addition, the structural face material 3 made of the above-mentioned cement board can be adjusted to a necessary and sufficient maximum yield strength by appropriately adjusting the number of laminations and the thickness of the lamination sheets when forming the above-mentioned laminated sheets. That is, it is possible to prevent the maximum yield strength from being excessively increased, and the need to extremely increase the strength of the above-mentioned steel frame body 2 and the screws 11, 12 and the like can be prevented. Thus, an inexpensive load-bearing wall can be obtained.

In addition, with the above configuration, the load-deformation curve of the load-bearing wall 1 can also be formed to approximate the above-mentioned ideal curve (curve L0 in FIG. 11 ) (see Example 3). In particular, the load-deformation curve of the load-bearing wall 1 can be made closer to the above-mentioned ideal curve by properly adjusting the number of laminations during the formation of the above-mentioned laminated plates.

As described above, according to this example, it is possible to provide an inexpensive load-bearing wall and a steel structure room that have good shear strength and can sufficiently absorb vibration energy.

Example 2

This example, as shown in FIG. 9 , is an example in which a so-called hacek-type papermaking machine 50 is used when manufacturing the structural surface material 3 .

This papermaking machine 50 has a manufacturing drum 51, a plurality of suction boxes 54 provided with a rotating cylinder (silinda) 53, and a felt that circulates between the manufacturing drum 51 and the rotating drum 53 while in contact with them. 55.

The slurry 41 thrown into the raw material box 52 of the papermaking machine 50 is supplied to each suction box 54 and dehydrated on the outer peripheral surface of the rotary cylinder 53 to form a thin raw material layer. This raw material layer is adsorbed onto the aforementioned felt 55 to form a single-layer sheet. In addition, layers of raw materials formed on the outer peripheral surfaces of the plurality of rotating cylinders 53 are superimposed on the felt 55 .

The single-layer sheet thus formed on the felt 55 is wound and laminated on the production drum 51 to form the laminated sheet 43 . Then, when seven layers of single-layer panels are stacked, they are cut and unfolded by a cutter 59 , and the above-mentioned laminated panels 43 are cut off from the production drum 51 . Thereafter, the laminated sheet 43 is extruded to produce an extruded sheet.

Thereafter, the structural face material 3 was produced by the same method as in Example 1.

In addition, other things are the same as in Example 1, and the same operation and effect as in Example 1 can be obtained also in this example.

Example 3

This example, as shown in FIGS. 10 and 11 , is an example of evaluating the in-plane shear strength characteristics of the load-bearing wall of the present invention.

The load-bearing wall 1 used as a test body is the load-bearing wall shown in Example 1 (FIGS. 1-3). The outer dimensions of the load-bearing wall 1 are 3030 mm in length and 910 mm in width. The front and rear width of the steel frame body 2 is 92 mm, and the thickness of the structural surface material 2 is 12 mm.

The fixing positions of the above-mentioned small screws 12 are basically separated by 150mm for the vertical material 211 at the left and right ends of the above-mentioned steel structure frame body 2, and the horizontal material 212 at the upper and lower sides. Moreover, the vertical material 211 arrange|positioned at the center part of the left-right direction of the said steel structure frame body 2 is basically spaced apart by 300 mm. In addition, the diameter of the small screw 12 is 4.2 mm.

The shear test method complies with the (financial) Japan Construction Center's evaluation book BCJ-LS-395 "KC type steel structure building type A".

Specifically, as shown in FIG. 10 , the above-mentioned load-bearing wall 1 is placed on a shear testing machine 7 . This shear testing machine 7 has two fixed tables 71, 72 arranged opposite to each other in the front and back, a movable pressing part 73 installed so as to be movable in the left and right direction with respect to one fixed table 71, and the movable pressing part 73 moving cylinders 74.

The movable pressing part 73 applies a load to the left or right along the upper side 13 of the load-bearing wall 1 .

Thereby, the load-bearing wall 1 deforms so as to bend leftward or rightward. The load and the shear deformation angle at this time were measured, and the relationship between them is shown in the load-deformation curve shown in FIG. 11 . The load-deflection curve associated with the load-bearing wall 1 of the present invention is the curve labeled L1. In FIG. 11 , the vertical axis is the value obtained by dividing the above load by the lateral width of the load-bearing wall 1 , and the horizontal axis is the shear deformation angle. The load on the longitudinal axis corresponds to the yield strength of the bearing wall 1 .

In FIG. 11, the curve marked with the symbol L0 is the above-mentioned ideal curve. That is, it is a curve showing deformation characteristics such that deformation continues without changing the yield strength after passing the required value of the primary design and reaching the required value of the secondary design.

Here, the required value of the above-mentioned primary design is 11.0 kN/m, and the required value of the above-mentioned secondary design is 16.5 kN/m.

As shown in FIG. 11 , the deformation curve L1 of the load-bearing wall 1 of the present invention is very similar to the above-mentioned ideal curve L0. Thus, according to the load-bearing wall 1 of the present invention, it can be seen that securing of shear strength, securing of vibration energy absorbability, and cost reduction can be achieved.

comparative example

Since this example is a comparative example, it is an example of measuring the in-plane shear strength characteristics of a load-bearing wall using various other structural surface materials different from the product of the present invention. The experimental method is as shown in Example 3 above.

As comparative sample 1, it is the example which used the 9 mm wood composite board generally used as a surface material for structures.

As comparative sample 2, it is the example which used the 12.5 mm gypsum board as a surface material for structures.

As a comparative sample 3, it is the example which used the 12.5 mm wood composite board as a structural surface material, and set the screw fixing interval with respect to the outer periphery of the steel frame body 2 to 75 mm. For Comparative Example 3, small screws with a diameter of 4.8 mm were used.

Others are identical with embodiment 3.

The results of measuring the in-plane shear strength characteristics of Comparative Samples 1, 2, and 3 are shown as curves L21, L22, and L23 in FIG. 11, respectively.

That is, in Comparative Sample 1 (curve L21 ) and Comparative Sample 2 (curve L22 ), the required values of the primary design and the secondary design are largely shifted downward, and the maximum yield strength is not sufficient. Furthermore, it becomes a load-deformation curve which deviates greatly from the above-mentioned ideal curve L0.

In addition, comparative sample 3 (curve L23) satisfies the requirements of the primary design and the secondary design, but its maximum yield strength is too large and deviates far from the above ideal curve L0.

Therefore, a steel structure frame capable of sufficiently withstanding the maximum yield strength, fastening parts such as tie bolts, leg piece metal parts, and the like are required, which raises a problem of cost increase.

Example 4

This example is an example of comparing the physical performance of the structural face material used in the load-bearing wall of the present invention with other cement boards.

That is, with respect to the structural surface material 2 shown in Example 1, the amount of deflection and the specific gravity were measured. The deflection amount is an amount obtained by measuring the displacement (displacement) of the central portion of the test body at the time of breaking.

The measurement of deflection is based on JIS A 1408, and a test body of 500 x 400 mm and a thickness of 12 mm is used as the test body.

For comparison, the same measurement was performed on Comparative Samples 4 and 5 below.

As comparative sample 4, a cement board manufactured by a so-called dry process method was used in which a mixture of cement 75% by mass and wood chips 25% by mass with an appropriate amount of water added was spread on a sample plate and extruded. That is, it does not add lightweight aggregates and reinforcing fibers, and is not obtained by a wet method.

As comparative sample 5, a cement board having a three-layer structure composed of front and back layers and a core material disposed between them was used which was produced by a dry manufacturing method. That is, as the above-mentioned front and back layers, a raw material obtained by adding an appropriate amount of water to 40% by mass of cement, 25% by mass of silica sand, 15% by mass of wood chips, 5% by mass of wood powder, and 15% by mass of waste, as the above-mentioned The core material is prepared by adding an appropriate amount of water to 35% by mass of cement, 20% by mass of silica sand, 10% by mass of wood fiber bundles, 5% by mass of wood chips, 28% by mass of waste, and 2% by mass of expanded polystyrene raw material.

In addition, for each sample, 5 samples were prepared and measured (n=5). In Table 1 the results of the assay are shown.

Table 1 Deflection (mm) proportion Product of the present invention 8～12 0.85～1.05 Comparative sample 4 4～6 1.00～1.20 Comparative sample 5 4～6 0.90～1.10

It can be seen from Table 1 that the structural surface material of the present invention has a large amount of deflection and a low specific gravity. Since the amount of deflection is large, it can be said that the above-mentioned structural surface material has high toughness. In addition, a low specific gravity is considered to contribute to the absorption of vibration energy and the improvement of toughness.

Industrial availability

According to the present invention, it is possible to provide an inexpensive steel structure building that has good shear strength and can sufficiently absorb vibration energy.

Claims (2)

1. A load-bearing wall, which is a load-bearing wall comprising a steel structure frame formed by forming a rectangular steel structure and a construction face material fixed on the steel structure frame, characterized in that: The surface material for the above structure is composed of cement board. The cement board is prepared by dispersing cement-like inorganic materials, silicic acid-containing substances, lightweight aggregates and reinforcing fibers in water to make slurry, and the slurry is dehydrated. Forming a single-layer sheet, winding the single-layer sheet on a manufacturing drum, laminating multiple layers until reaching a specified thickness to form a laminated sheet, cutting the laminated sheet from the above-mentioned manufacturing drum, and performing extrusion molding It is obtained by making an extruded plate, and then hardening and curing the extruded plate. 2. A steel structure room, which is a steel structure room with a steel structure frame comprising a rectangular steel frame and a load-bearing wall of a construction surface material fixed on the steel structure frame, characterized in that : The surface material for the above structure is composed of cement board. The cement board is prepared by dispersing cement-like inorganic materials, silicic acid-containing substances, lightweight aggregates and reinforcing fibers in water to make slurry, and the slurry is dehydrated. Forming a single-layer sheet, winding the single-layer sheet on a manufacturing drum, laminating multiple layers until reaching a specified thickness to form a laminated sheet, cutting the laminated sheet from the above-mentioned manufacturing drum, and performing extrusion molding It is obtained by making an extruded plate, and then hardening and curing the extruded plate.

Images