TW201536990A - Column structure and base member - Google Patents

Abstract

In a column structure (10), a steel column (30) serving as a column member is joined to a base plate (16A) serving as a base member 16. The steel column (30) is configured by a pair of flanges (30B) provided at each of two width direction ends of a web (30A). One end side of the base plate (16A) is fixed by first anchor bolts (24) serving as first anchor members. The other end side of the base plate (16A) is fixed by first anchor bolts (28) serving as second anchor members, and the first anchor bolts (28) are formed with higher tensile strength than the first anchor bolts (24).

Description

Column structure and bottom member

The present invention relates to a column structure in which a column member is coupled on an upper side of a bottom member and a bottom member in which a column member is coupled on an upper side.

Japanese Patent Publication No. 6-19147 discloses a column foot structure. In the column structure, the anchor bolts embedded in the concrete foundation are joined to the bottom plate. The bottom plate engages the cylinder, the center of the projected contour of the cylinder relative to the horizontal plane being eccentric from the center of the projected contour of the bottom plate relative to the horizontal plane. Further, in the above-described column structure, an outer surface deformation preventing mechanism is provided on the bottom plate on the side opposite to the eccentric side of the column. The outer surface deformation preventing mechanism is composed of a washer, an anchor bolt or a rib. With the outer surface deformation preventing mechanism, when the bending moment of the cylinder occurs, deformation of the outer surface of the bottom plate which causes the top surface to be protruded and deformed can be prevented.

In the above-described column structure, the column is eccentrically joined to the bottom plate, and an outer surface deformation preventing mechanism must be provided on the bottom plate. Therefore, the column structure becomes complicated, so there is still room for improvement.

[Problems to be solved by the invention]

In view of the above facts, an object of the present invention is to obtain a column structure and a bottom member which can improve the bending strength of the column by a simple configuration. [Means for solving problems]

A column structure according to a first aspect of the present invention includes: a column member provided with a flange integrally formed on both sides in the width direction of the web; and a bottom member joined to the column member on the upper side; the first anchor member The lower end side is fixed to the base, and the upper end side is fixed to one end side in the width direction of the web or the flange of the bottom member; and the second anchoring member is fixed to the base at the lower end side thereof, and the upper end side is fixed to the belly of the bottom member The other end side of the width direction of the plate or the flange is higher than the tensile strength of the first anchoring member.

A column structure according to a second aspect of the present invention is the column structure according to the first aspect, wherein a shaft diameter of the second anchor member is set to be larger than a shaft diameter of the first anchor member.

A column structure according to a third aspect of the present invention is the column structure according to the first aspect, wherein the second anchoring member is formed of a material having a higher tensile strength than the first anchoring member.

A column structure according to a fourth aspect of the present invention is the column structure according to the first aspect, wherein the second anchoring member is composed of a larger number than the first anchoring member.

According to a fifth aspect of the present invention, in a column structure according to the first aspect, the first anchoring member or the second anchoring member includes: a first anchoring bolt having an upper end side fixed to the bottom member The side of the flange opposite to the web side; and the second anchor bolt, the upper end side of which is fixed to the bottom member in the width direction inner side of the web than the first anchor bolt, and is higher than the first anchor Set the bolt closer to the flange.

A column structure according to a sixth aspect of the present invention is the column structure according to the first aspect, wherein the first anchor member is disposed inside the structure, and the second anchor member is disposed outside the structure.

A column configuration according to a seventh aspect of the present invention includes: a column member provided with a flange integrally formed on both sides in the width direction of the web; and a bottom member joined to the column member at the upper side while the center of the column member The position is eccentric with respect to the center position of the bottom body in the width direction of the web or the flange; the first anchoring member has a lower end side fixed to the base, and the upper end side is fixed to one end side in the width direction of the web of the bottom member; 2 The anchoring member has a lower end side fixed to the base, and the upper end side is fixed to the other end side in the width direction of the web or the flange of the bottom member, and has the same tensile strength as the first anchoring member.

A column structure according to an eighth aspect of the present invention is the column structure of the seventh aspect, wherein the first anchoring member fixes the upper end side to the side of the flange of the bottom member opposite to the web side, the second The anchoring member fixes the upper end side to the web side of the flange in the bottom member.

A column structure according to a ninth aspect of the present invention is the column structure of the first aspect or the seventh aspect, wherein the bottom member includes a notch portion that is partially cut along the web.

A column structure according to a tenth aspect of the present invention is the column structure of the first aspect or the seventh aspect, wherein the bottom member is provided with: a first bottom member which is coupled to the flange on one side and fixed at the same time An upper end side of the first anchoring member; and a second bottom member coupled to the flange on the other side and fixed to the upper end side of the second anchoring member and disposed to be interposed with respect to the first bottom member interval.

A bottom member according to an eleventh aspect of the present invention includes: a bottom body which is coupled to a column member provided with a flange integrally formed on both sides in a width direction of the web on the upper side; and a first fixing portion provided at the bottom One end side of the web or the flange in the width direction, and fixed to the upper end side of the first anchoring member fixed to the base on the lower end side; and a second fixing portion provided on the width of the web or the flange of the bottom body The other end side of the direction is fixed to the upper end side of the second anchoring member which is fixed to the base at the lower end side and has a higher tensile strength than the first anchoring member.

A bottom member according to a twelfth aspect of the present invention includes: a bottom body which is coupled on the upper side to a column member provided with a flange integrally formed on both sides in the width direction of the web, the center position of the column member being directed to the web Or the flange is eccentric in the width direction; the first fixing portion is provided on one end side in the width direction of the web of the bottom body, and is fixed to the upper end side of the first anchor member fixed to the base on the lower end side; and the second fixing portion It is provided on the other end side in the width direction of the web of the bottom body, and is fixed to the upper end side of the second anchoring member which is fixed to the base at the lower end side and has the same tensile strength as the first anchoring member.

A bottom member according to a thirteenth aspect of the invention is the bottom member of the eleventh aspect or the twelfth aspect, wherein the bottom body has a notch portion which is partially cut along the web.

The bottom member according to the fourteenth aspect of the present invention, wherein the bottom member is: the first bottom body, the first bottom body is coupled to the one side flange at the upper side, and is fixed at the same time. An upper end side of the first anchoring member; and a second bottom body coupled to the flange on the other side and fixed to the upper end side of the second anchoring member, and disposed to be interposed with respect to the first bottom body interval. [Effect of the invention]

In the column structure according to the first aspect of the present invention, the column members provided with the flanges integrally formed on both sides in the width direction of the web are joined to the upper side of the bottom member. Further, the lower end sides of the first anchoring member and the second anchoring member are fixed to the base, and the bottom member is fixed to the upper end sides of the first anchoring member and the second anchoring member.

Here, the upper end side of the first anchoring member is fixed to one end side in the width direction of the web or the flange in the bottom member. Further, the upper end side of the second anchoring member is fixed to the other end side in the width direction of the web or the flange in the bottom member, and the tensile strength of the second anchoring member is higher than that of the first anchoring member. . For example, when a force in the horizontal direction is applied to the column member from the other end side to the one end side of the bottom member, the column member is more stretched in the vertical direction on the other end side than the one end side of the bottom member. Axial force. This large tensile axial force is effectively suppressed by the second anchoring member having an increased tensile strength. Therefore, by improving the tensile strength of the second anchoring member and improving the simple structure, the column bending strength of the column structure can be improved.

In the column structure according to the second aspect of the present invention, the shaft diameter of the second anchoring member is set to be larger than the axial diameter of the first anchoring member. Therefore, the tensile strength of the second anchoring member can be improved by increasing the axial diameter and the simple structure, and the bending strength of the column structure can be improved.

In the column structure according to the third aspect of the present invention, the second anchoring member is made of a material having a higher tensile strength than the first anchoring member. Therefore, by using a simple structure of a material having a high tensile strength, the tensile strength of the second anchoring member can be improved, and the bending strength of the column structure can be improved.

In the column structure according to the fourth aspect of the present invention, the second anchoring member is composed of a larger number than the first anchoring member. Therefore, the tensile strength of the second anchor member can be improved by making the number of such simple structures more, and the column bending strength of the column structure can be improved.

In the column structure according to the fifth aspect of the present invention, the first anchoring member or the second anchoring member includes the first anchoring bolt and the second anchoring bolt. The upper end side of the first anchor bolt is fixed to the side of the flange in the bottom member opposite to the web side. The upper end side of the second anchor bolt is fixed to the bottom member in the width direction inner side of the web than the first anchor bolt. Then, since the second anchor bolt is closer to the flange than the first anchor bolt, the distance between the column member and the second anchor bolt is reduced. Here, the thickness of the bottom member is determined by the tensile strength of the second anchor bolt and the distance between the second anchor bolt and the column member. Therefore, the distance between the second anchor bolt and the column member is reduced, and the thickness of the bottom member can be made thin.

In the column structure according to the sixth aspect of the present invention, the first anchoring member is disposed inside the structure, and the second anchoring member is disposed outside the building. For example, when a horizontal force is applied to the column member from the outer side to the inner side of the structure, a large tensile axial force is generated in the vertical direction to the second anchoring member located outside the building. This large tensile axial force is effectively suppressed by the second anchoring member having an increased tensile strength. Therefore, by improving the strength of the second anchoring member, the simple bending structure can improve the bending strength of the column structure.

In the column structure according to the seventh aspect of the present invention, the column members provided with the flanges integrally formed on both sides in the width direction of the web are joined to the upper side of the bottom member. Further, the lower end sides of the first anchoring member and the second anchoring member are fixed to the base, and the bottom member is fixed to the upper end sides of the first anchoring member and the second anchoring member.

Here, the first anchoring member and the second anchoring member have the same tensile strength, the upper end side of the first anchoring member is fixed to one end side of the bottom member, and the upper end side of the second anchoring member is fixed to the bottom member. The other end side. Then, since the center position of the column member is eccentric to the width direction of the web or the flange with respect to the center position of the bottom body, the eccentric portion of the column member of the bottom member is reinforced by the column member. For example, when the force in the horizontal direction is applied to the column member from the opposite side of the eccentric direction of the column member, a portion of the eccentricity of the column member of the bottom member generates a large tensile axial force in the vertical direction of the column member. This large tensile axial force is effectively suppressed by the eccentricity and reinforcement of the column member of the bottom member. Therefore, by using the simple structure in which the column member is eccentrically coupled to the bottom member, the column bending strength of the column structure can be improved.

In the column structure according to the eighth aspect of the present invention, since the upper end side of the second anchoring member is fixed to the web side of the flange in the bottom member, the flange and the abdomen can be provided on the other end side of the bottom member. The portion on the side opposite to the side of the plate is removed. Thereby, since the center position of the bottom member moves toward the one end side of the bottom member with respect to the center position of the column member, the center position of the column member can be simply eccentric with respect to the center position of the bottom member.

In the column structure according to the ninth aspect of the present invention, since the bottom member includes the notch portion, the portion corresponding to the notch portion of the bottom member is removed, and the bottom member is made lighter.

A column structure according to a tenth aspect of the present invention includes a first bottom member in which a bottom member is coupled to one flange, and a second bottom member coupled to the other flange. The first bottom member and the second bottom member are interposed therebetween. interval. Thereby, since the part of the bottom member is removed between the first bottom member and the second bottom member, the bottom member can be made lighter.

In the bottom member according to the eleventh aspect of the invention, the column members provided with the flanges integrally formed on both sides in the width direction of the web are joined to the upper side of the bottom body. Further, the lower end sides of the first anchoring member and the second anchoring member are fixed to the base, and the first fixing portion of the bottom body is fixed to the upper end side of the first anchoring member, and the second fixing portion of the bottom body is fixed at the 2 The upper end side of the anchoring member.

Here, the first fixing portion is fixed to the upper end side of the first anchoring member at one end side in the width direction of the web or the flange of the bottom body. Further, the second fixing portion is fixed to the upper end side of the second anchor member at the other end side in the width direction of the web or the flange of the bottom body, and the tensile strength of the second anchor member is higher than that of the first anchor member. The strength is higher. For example, when a force in the horizontal direction is applied to the column member from the other end side to the one end side of the bottom body, the column member is more stretched in the vertical direction on the other end side than the one end side of the bottom body. Axial force. This large tensile axial force is effectively restrained by the second anchoring member that is fixed to the second fixing portion and whose tensile strength is improved. Therefore, the simple anchoring structure in which the second anchoring member having the increased tensile strength is fixed to the second fixing portion of the bottom body can improve the bending strength of the column structure.

In the bottom member according to the twelfth aspect of the invention, the column members provided with the flanges integrally formed on both sides in the width direction of the web are joined on the upper side of the bottom body. Further, the lower end sides of the first anchoring member and the second anchoring member are fixed to the base, and the first fixing portion of the bottom body is fixed to the upper end side of the first anchoring member, and the second fixing portion of the bottom body is fixed at the 2 The upper end side of the anchoring member.

Here, the first anchoring member and the second anchoring member have the same tensile strength, and the upper end side of the first anchoring member is fixed to the first fixing portion of the bottom body, and the upper end side of the second anchoring member is fixed to The second fixing portion of the bottom body. Then, since the center position of the column member is eccentric toward the width direction of the web or the flange, the portion of the bottom member that is eccentric to the column member is reinforced by the column member. For example, when the force in the horizontal direction is applied to the column member from the opposite side of the eccentric direction of the column member, a portion of the eccentricity of the column member of the bottom body generates a large tensile axial force in the vertical direction of the column member. This large tensile axial force is effectively suppressed by the eccentric and reinforced portion of the column member of the bottom body. Therefore, by using the simple structure in which the column member is eccentrically coupled to the bottom body, the column bending strength of the column structure can be improved.

In the bottom member according to the thirteenth aspect of the present invention, since the bottom body includes the notch portion, the portion corresponding to the notch portion of the bottom body is removed, and the bottom body is made lighter.

A bottom member according to a fourteenth aspect of the present invention includes a first bottom body in which the bottom body is coupled to the one side flange, and a second bottom body coupled to the other side flange. Then, the first bottom body and the second bottom body are spaced apart from each other. Therefore, since the portion of the bottom body between the first bottom body and the second bottom body is removed, the bottom body can be made lighter.

First Embodiment FIG. 1 to FIG. 5 illustrate a column structure and a bottom member according to a first embodiment of the present invention. Further, in the present embodiment, the column member is an H-shaped iron column (H-shaped steel column), and the arrow WH direction appropriately indicated in the figure indicates the width direction of the web of the column member, and the arrow FH direction indicates The width direction of the flange of the column member. In addition, the arrow UP direction indicates the upward direction.

(Structure of Column Structure and Bottom Member) As shown in FIGS. 1 and 2, the column structure 10 of the present embodiment is provided on the foundation 12. The foundation 12 is, for example, concrete, and the top surface of the foundation 12 is horizontal and planar. Although the drawings are omitted, the reinforcing bars are disposed inside the foundation 12 to increase the strength of the foundation 12.

A cement 14 as a fixing mechanism is provided on the top surface of the foundation 12. The cement 14 is, for example, rectangular in plan view.

A bottom member 16 is fixed to the top surface of the cement 14. The bottom member 16 is provided with a bottom plate 16A as a bottom body. A cement 14 is integrally provided on the lower side of the bottom plate 16A. The bottom plate 16A has a rectangular flat plate shape with the arrow WH direction as the longitudinal direction and the arrow FH direction as the short side direction. Specifically, the bottom plate 16A is formed of a metal material such as rolled steel SN490B for building construction and cast steel as defined by Japanese Industrial Standards (JIS Standard) G3136.

In FIG. 1 and FIG. 2, the first fixing hole 18A and the first fixing hole 18B as the first fixing portion are provided at one end portion in the longitudinal direction of the bottom plate 16A shown on the right side, and 2 fixing holes 18C and 2 fixing holes 18D are two fixing holes. The first fixing hole 18A and the first fixing hole 18B are provided at an intermediate portion in the short-side direction of the bottom plate 16A. The second fixing hole 18C and the second fixing hole 18D are provided at both end portions of the bottom plate 16A in the short-side direction. The first fixing hole 18A, the first fixing hole 18B, the second fixing hole 18C, and the second fixing hole 18D are formed by circular through holes having the same diameter in plan view.

The position of the central axis of the first fixing hole 18A and the position of the central axis of the first fixing hole 18B coincide in the direction of the arrow FH. The position of the central axis of the second fixing hole 18C and the position of the central axis of the second fixing hole 18D coincide in the direction of the arrow FH. Further, the positions of the central axes of the second fixing holes 18C and the second fixing holes 18D are closer to the inner side in the arrow WH direction than the positions of the central axes of the first fixing holes 18A and the first fixing holes 18B, and closer to the bottom plate 16A. The center of the long side direction. In addition, the position of the central axis of the second fixing hole 18C is located outside the arrow FH direction from the position of the central axis of the first fixing hole 18A. Further, the position of the central axis of the second fixing hole 18D is located outside the arrow FH direction than the position of the central axis of the first fixing hole 18B.

In FIG. 1 and FIG. 2, two fixing holes of the first fixing hole 20A and the first fixing hole 20B as the second fixing portion are provided at the other end portion in the longitudinal direction of the bottom plate 16A shown on the left side, and Two fixing holes of the second fixing hole 20C and the second fixing hole 20D. The first fixing hole 20A and the first fixing hole 20B are provided at an intermediate portion in the short-side direction of the bottom plate 16A. The second fixing hole 20C and the second fixing hole 20D are provided at both end portions of the bottom plate 16A in the short-side direction. The second fixing hole 20C and the second fixing hole 20D are formed by circular through holes having the same diameter in plan view, and have the same diameter as the through holes of the first fixing holes 18A. On the other hand, the first fixing hole 20A and the first fixing hole 20B are formed by circular through holes having the same diameter in plan view, and in the present embodiment, the diameter is smaller than the second fixing holes 20C and the second fixing. Hole 20D is larger. In other words, the diameters of the first fixing hole 20A and the first fixing hole 20B are set to be larger than the diameters of the second fixing hole 20C and the second fixing hole 20D.

The position of the central axis of the first fixing hole 20A and the position of the central axis of the first fixing hole 20B coincide in the direction of the arrow FH. The position of the central axis of the second fixing hole 20C and the position of the central axis of the second fixing hole 20D coincide in the direction of the arrow FH. Further, the positions of the central axes of the second fixing holes 20C and the second fixing holes 20D are closer to the inner side in the arrow WH direction than the positions of the central axes of the first fixing holes 20A and the first fixing holes 20B, and closer to the bottom plate 16A. The center of the long side direction. In addition, the position of the central axis of the second fixing hole 20C is located outside the arrow FH direction than the position of the central axis of the first fixing hole 20A. Further, the position of the central axis of the second fixing hole 20D is located outside the arrow FH direction from the position of the central axis of the first fixing hole 20B.

In addition, the position of the central axis of the first fixing hole 20A coincides with the position of the central axis of the first fixing hole 18A in the direction of the arrow WH, and the position of the central axis of the first fixing hole 20B is in the direction of the arrow WH and 1 The positions of the central axes of the fixing holes 18B are the same. The position of the central axis of the second fixing hole 20C coincides with the position of the central axis of the second fixing hole 18C in the direction of the arrow WH, and the position of the central axis of the second fixing hole 20D is in the direction of the arrow WH and the second fixing hole. The position of the center axis of the 18D is the same.

Therefore, the bottom plate 16A includes four first fixing holes 18A, first fixing holes 18B, second fixing holes 18C, and second fixing holes 18D, and the first fixing holes 20A, the first fixing holes 20B, and the second fixing holes. There are 4 20C and 2nd fixing holes 20D, and a total of 8 fixing holes.

As shown in FIGS. 1 and 2, a concave portion 22 is formed on the bottom surface of the bottom plate 16A around each of the eight fixing holes such as the first fixing hole 18A. The top surface of the recess 22 in the horizontal direction (the bottom surface of the recess 22) is planar. The recessed portion 22 is gradually enlarged toward the outer peripheral side of the bottom plate 16A, and is open to the outer periphery of the outer bottom plate 16A, and has a substantially triangular shape in plan view. In the peripheral surface of the recessed portion 22 in the vertical direction, one portion on the center side of the bottom plate 16A and the inner surface of the first fixing hole 18A and the like are formed by the same surface. The entirety of the recess 22 is filled with the glue 14, and the bottom plate 16A is fixed by the glue 14.

In the first fixing portion of the bottom member 16, the first anchoring member is fixed to the base 12, and in the second fixing portion, the second anchoring member is fixed to the base 12. The first anchoring member includes a first anchor bolt (anchor lock) 24 and a second anchor bolt (anchor lock) 24 . Further, the second anchoring member includes a first anchor bolt (anchor lock) 28 and a second anchor bolt (anchor lock) 26.

Each of the first anchor bolt 24 and the second anchor bolt 24 of the first anchoring member includes a cylindrical anchor body 24A, and the axial direction of the anchor body 24A is the vertical direction. Most of the lower end portion 24B including the upper end portion 24C of the anchor body 24A penetrates the cement 14 and is buried in the foundation 12. The first anchor bolt 28 of the second anchoring member includes a cylindrical anchor body 28A, and the axial direction of the anchor body 28A is the vertical direction. Most of the lower end portion 28B including the upper end portion 28C of the anchor body 28A penetrates the cement 14 and is buried in the foundation 12. Further, the second anchor bolt 26 of the second anchoring member includes a cylindrical anchor body 26A, and the axial direction of the anchor body 26A is the vertical direction. Most of the lower end portion 26B including the upper end portion 26C of the anchor body 26A penetrates the cement 14 and is buried in the foundation 12.

In the first anchor bolt 24 and the second anchor bolt 24 of the first anchoring member, a male screw portion is provided at the lower end portion 24B of the anchor body 24A, and the male screw portion is provided in two in the up and down direction. The nut 24D and the nut 24E are screwed together. Between the nut 24D and the nut 24E, an annular flat plate-shaped fixing plate 24F that constitutes the anchor portion and protrudes outward from the axial diameter of the anchor body 24A is interposed. The fixing plate 24F is locked and fixed by the nut 24D and the nut 24E. The nut 24D, the nut 24E, and the fixing plate 24F are embedded in the foundation 12, and constitute a structure for preventing the first anchor bolt 24 from being pulled out.

The upper end portion 24C of the anchor body 24A has a structure in which the first fixing hole 18A, the first fixing hole 18B, the second fixing hole 18C, or the second fixing hole 18D that penetrate the bottom plate 16A protrude. A male screw portion is provided in the upper end portion 24C, and the male screw portion is screwed to the nut 24G of the fixed bottom plate 16A. A ring-shaped gasket 24H is provided between the bottom plate 16A and the nut 24G.

In the first anchor bolt 28 of the second anchoring member, the male screw portion provided at the lower end portion 28B of the anchor body 28A is screwed to the two nuts 28D and the nut 28E. A ring-shaped fixing plate 28F is provided between the nut 28D and the nut 28E. The fixing plate 28F is locked and fixed by the nut 28D and the nut 28E. The nut 28D, the nut 28E, and the fixing plate 28F are embedded in the foundation 12, and constitute a structure for preventing the first anchor bolt 28 from being pulled out. The upper end portion 28C of the anchor body 28A has a structure that protrudes through the first fixing hole 20A or the first fixing hole 20B as the second fixing portion of the bottom plate 16A. A male screw portion is provided in the upper end portion 28C, and the male screw portion is screwed to the nut 28G of the fixed bottom plate 16A. A ring-shaped washer 28H is provided between the bottom plate 16A and the nut 28G.

Similarly, in the second anchor bolt 26 of the second anchoring member, the male screw portion provided at the lower end portion 26B of the anchor body 26A is screwed to the two nuts 26D and the nut 26E. A ring-shaped fixing plate 26F is provided between the nut 26D and the nut 26E. The fixing plate 26F is locked and fixed by the nut 26D and the nut 26E. The nut 26D, the nut 26E, and the fixing plate 26F are embedded in the foundation 12, and constitute a structure for preventing the second anchor bolt 26 from being pulled out. The upper end portion 26C of the anchor body 26A has a structure that protrudes through the second fixing hole 20C or the second fixing hole 20D of the bottom plate 16A. A male screw portion is provided in the upper end portion 26C, and the male screw portion is screwed to the nut 26G of the fixed bottom plate 16A. A ring-shaped washer 26H is provided between the bottom plate 16A and the nut 26G.

In the present embodiment, the first anchor bolt 24 of the first anchoring member, the second anchor bolt 24, and the second anchor bolt 26 of the second anchoring member have the same diameter and the same axial length. Then, the first anchor bolt 28 of the second anchoring member has, for example, a larger axial diameter than the first anchor bolt 24 of the first anchoring member, and has a higher tensile strength. Specifically, the first anchor bolt 24, the second anchor bolt 24, the first anchor bolt 28, and the second anchor bolt 26 have a tensile strength of 400 N/mm ² as defined by JIS Standard G3138, for example. Carbon steel such as 490 N/mm ² is formed. Further, an anchor bolt formed of a stainless steel material having a tensile strength of 520 N/mm ² as defined by JIS Standard G4321 can also be used. Then, when the diameters of the first anchor bolt 24, the second anchor bolt 24, and the second anchor bolt 26 are set to, for example, 30 mm (the name of the bolt is "M30"), the diameter of the first anchor bolt 28 is set to For example, 36mm (the name of the bolt is "M36").

An iron column 30 as a column member extending in the longitudinal direction from the upper and lower sides is provided at a central portion of the top surface of the bottom plate 16A. The lower end of the iron column 30 is bonded to the top surface of the bottom plate 16A by, for example, arc welding.

In the present embodiment, the iron column 30 is formed of an H-shaped steel material having a web 30A and a pair of flanges 30B integrally formed at both ends in the width direction of the web 30A. Here, the web 30A of the iron column 30 is formed in a long rectangular plate shape with the arrow WH direction being the width direction and the arrow UP direction being the longitudinal direction. Each of the pair of flanges 30B has a width direction in the direction of the arrow FH and a longitudinal direction in the direction of the arrow UP, forming a long rectangular plate shape. Both ends of the web 30A are integrally joined at a central portion in the width direction of the flange 30B. The iron ore column 30 is formed of a material such as a rolled steel material for a building structure defined by JIS Standard G3136, a rolled steel material for a welded structure specified in JIS Standard G3106, and a rolled steel material for general structure defined in JIS Standard G3101.

In addition, in general, the column structure 10 is provided in plural in the construction. Although the drawings are omitted, the base beam is placed between the lower end portions of the iron column 30 of the adjacent column structure 10, and the main beam main ribs are disposed.

(Structure of Construction) FIG. 3 is a schematic side view showing a structure in which the column structure 10 and the bottom member 16 of the present embodiment are used. In addition, FIG. 4 is a side view structure showing the main part of the structure.

In the column structure 10 on the left side shown in FIG. 3 and FIG. 4, the first fixing hole 18A as the first fixing portion of the bottom member 16, the first fixing hole 18B, the second fixing hole 18C, and the second fixing hole 18D ( Referring to Fig. 1 and Fig. 2), the inside (right side) of the building is placed. Inside the building, the first anchor bolt 24 and the second anchor bolt 24 as the first anchoring member are fixed to the bottom plate 16A. The first fixing hole 20A, the first fixing hole 20B, the second fixing hole 20C, and the second fixing hole 20D (see FIGS. 1 and 2 ) as the second fixing portion of the bottom member 16 are disposed on the outer side (left side) of the structure. On the outer side of the structure, the first anchor bolt 28 and the second anchor bolt 26 as the second anchoring member are fixed to the bottom plate 16A.

On the other hand, the column structure 10 on the right side shown in FIG. 3 and FIG. 4 is a structure in which the column structure 10 of the left side is rotated by 180 degrees with respect to the center line of the arrow UP direction of the structure omitted as shown in the drawing. In other words, in the column structure 10 on the right side, the first fixing hole 18A, the first fixing hole 18B, the second fixing hole 18C, and the second fixing hole 18D as the first fixing portion of the bottom member 16 are disposed on the inner side (left side) of the structure. . Inside the building, the first anchor bolt 24 and the second anchor bolt 24 as the first anchoring member are fixed to the bottom plate 16A. The first fixing hole 20A, the first fixing hole 20B, the second fixing hole 20C, and the second fixing hole 20D which are the second fixing portions of the bottom member 16 are disposed on the outer side (right side) of the structure. On the outer side of the structure, the first anchor bolt 28 and the second anchor bolt 26 as the second anchoring member are fixed to the bottom plate 16A.

Here, as shown in FIG. 3, between the column structure 10 on the left side and the column structure 10 on the right side, the first beam member 32, the second beam member 34, and the third beam member 36 that partition each level are provided. One end portion of the left side of the first beam member 32 and the iron column 30 of the left column structure 10 are coupled to each other by arc welding or bolt fixing, and the other end portion of the right side of the first beam member 32 and the iron of the right column structure 10 are provided. The bone posts 30 are joined to each other using the same bonding mechanism. In the present embodiment, the first beam member 32 is an H-shaped iron beam in which the flange 32B is integrally formed at both ends in the width direction (arrow direction UP direction) of the web 32A. Similarly, both end portions of the second beam member 34 are coupled to the iron column 30 of the column structure 10 on the left and right sides, and both end portions of the third beam member 36 are combined with the iron column 30 of the column structure 10 on the left and right sides. . The second beam member 34 uses an H-shaped iron beam having a web 34A and a flange 34B, and the third beam member 36 uses an H-shaped iron beam having a web 36A and a flange 36B. Further, the first beam member 32, the second beam member 34, and the third beam member 36 may be formed of a beam member such as an I-shaped iron beam or an angled iron beam.

(Effects of the first embodiment) The column structure 10 and the bottom member 16 of the present embodiment are provided with a convex body integrally formed on both sides in the width direction of the web 30A as shown in Figs. 1 and 2 . The iron column 30 of the rim 30B is joined on the upper side of the bottom plate 16A. Further, the lower end sides of the first anchoring member and the second anchoring member are fixed to the base 12, and the bottom plate 16A is fixed to the upper end sides of the first anchoring member and the second anchoring member.

Here, the upper end sides of the first anchor bolts 24 and the second anchor bolts 24 as the first anchor members are fixed to one end side in the width direction of the web 30A in the bottom plate 16A. Further, the upper end sides of the first anchor bolts 28 and the second anchor bolts 26 as the second anchor members are fixed to the other end side in the width direction of the web 30A in the bottom plate 16A. Then, the tensile strength of the first anchor bolt 28 of the second anchoring member is higher than the tensile strength of the first anchor bolt 24 of the first anchoring member.

As shown in FIG. 1, FIG. 3, and FIG. 4, when a force F acting from the left side to the right side is generated outside the building due to an earthquake or the like in, for example, the direction of the arrow WH (horizontal direction), at the force F In the column structure 10 on the left side of the active structure, the maximum tensile axial force St is generated at the flange 30B on the outer side of the iron column 30. On the other hand, in the column structure 10 on the right side of the structure, the maximum compression axial force Sp is generated in the flange 30B on the outer side of the iron column 30. Since the direction of the force F is alternately reversed in the case of an earthquake, the tensile axial force St and the compression axial force Sp are alternately generated in the flange 30B of the column structure 10 on the left side, and also the convexity of the column structure 10 on the right side. The edge 30B alternately generates a compression axial force Sp and a tensile axial force St.

In the column structure 10, the relationship between the axial force N occurring in the iron column 30 and the bending strength N of the column is shown in Fig. 5. As shown in FIG. 5, the column bending strength is strong with respect to the compression axial force occurring in the iron column 30, but the column bending strength is weak relative to the tensile axial force. Therefore, it is necessary to increase the bending strength of the column with respect to the tensile axial force. Further, the region B surrounded by the broken line occurs in the axial force range of the general structure, and the bending strength of the column in the region B with respect to the tensile axial force tends to be weak.

In the column structure 10 and the bottom member 16 of the present embodiment, the diameters of the first fixing hole 20A and the first fixing hole 20B which are the second fixing portions of the bottom plate 16A located outside the structure are enlarged. Further, the first fixing hole 20A and the first fixing hole 20B are provided with a first anchoring bolt 28 as a second anchoring member having a tensile strength higher than that of the first anchoring member. In other words, the second anchoring member having a large tensile strength is provided in the second fixing portion of the bottom plate 16A, and the large tensile axial force generated in the iron column 30 is effectively suppressed by the second anchoring member. Therefore, by improving the tensile strength of the second anchoring member (particularly, the first anchor bolt 28), the column bending strength of the column structure 10 can be improved.

Further, in the column structure 10 and the bottom member 16 of the present embodiment, as shown in FIGS. 1 and 2, the shaft diameter of the first anchor bolt 28 of the second anchor member is set to be larger than that of the first anchor member. The first anchor bolt 24 has a larger shaft diameter. Therefore, the tensile strength of the first anchor bolt 28 can be improved by increasing the axial diameter of the first anchor bolt 28, and the bending strength of the pillar structure 10 can be improved.

Further, in the column structure 10 and the bottom member 16 of the present embodiment, as shown in FIG. 1, the bottom plate 16A is fixed to the second anchor bolt 24 of the first anchoring member provided on the inner side in the width direction of the web 30A. Upper end portion 24C. Similarly, the bottom plate 16A is fixed to the upper end portion 26C of the second anchor bolt 26 of the second anchoring member provided on the inner side in the width direction of the web 30A. Therefore, as shown in FIGS. 1 and 2, the second anchor bolt 24 is close to the flange 30B of the iron column 30, and the distance L between the flange 30B and the second anchor bolt 24 is small. The distance between the flange 30B and the second anchor bolt 26 is also small. In addition, attention is paid to the side of the first anchor member on one side. The total number of the first anchor bolts 24 and the second anchor bolts 24 provided in the bottom plate 16A (or the total of the first fixing holes 18A, the first fixing holes 18B, the second fixing holes 18C, and the second fixing holes 18D) When the number of holes is increased, the thickness (thickness dimension in the up and down direction) t of the bottom plate 16A must also be increased.

Here, first, the total number of the first anchor bolts 24 and the second anchor bolts 24 provided around the one side flange 30B in the bottom plate 16A is n. n is "4" in this embodiment. The tensile strength at the axial direction of the i-th first anchor bolt 24 or the second anchor bolt 24 of the i-th arrow in the FH direction is Ti. The central axis of the i-th first anchor bolt 24 or the second anchor bolt 24 is spaced apart from the flange 30B by a distance Li in the direction of the arrow WH. Further, the dimension (width dimension) of the bottom plate 16A in the arrow FH direction is B, and then the thickness of the bottom plate 16A is t, and the drop point of the material of the bottom plate 16A is σ. At this time, in the bottom plate 16A, the relational expression represented by the following mathematical expression 1 holds. [Math 1]

In the above relational expression, if the left separation distance Li becomes smaller, the thickness t on the right side also becomes smaller. That is, in the present embodiment, the thickness of the bottom plate 16A can be made thinner by actively reducing the separation distance Li. If the material cost of the bottom plate 16A can be reduced, the material cost of the column structure 10 can be reduced, and the manufacturing cost can be reduced.

Further, in the column structure 10 and the bottom member 16 of the present embodiment, the first anchor bolt 24 of the first anchor member is disposed inside the structure, and the first anchor bolt 28 of the second anchor member is disposed at the same time. The outside of the building. For example, when a tensile axial force is generated in the iron column 30, a large tensile axial force is generated on the outer side of the structure to the iron column 30. Here, the tensile axial force acting portion (the second fixing portion side) of the bottom plate 16A is fixed by the first anchor bolt 28 of the second anchoring member having a high tensile strength. Therefore, the large tensile axial force is suppressed by the first tensile bolt 28 having a large tensile strength, so that the column bending strength of the column structure 10 can be improved.

Further, in the column structure 10 and the bottom member 16 of the present embodiment, the concave portion 22 is provided on the lower side of the bottom plate 16A. The recess 22 is filled with the glue 14, and the bottom plate 16A is locked to the foundation 12 via the glue 14. Therefore, when a horizontal load of an earthquake or the like is generated, the offset of the bottom member 16 with respect to the base 12 can be prevented. Therefore, the column structure 10 and the bottom member 16 can effectively suppress the shear stress transmitted from the iron column 30 to the foundation 12 via the bottom plate 16A, the first anchoring member, and the second anchoring member, so that the shear strength can be improved. .

Further, in the column structure 10 and the bottom member 16 of the present embodiment, the other end side is stretched with respect to one end side of the bottom plate 16A in the arrow WH direction (the width direction of the web 30A) shown in Fig. 2 . Increased strength. In the present embodiment, the tensile strength at the other end side can be increased with respect to the one end side of the bottom plate 16A in the arrow FH direction (the width direction of the flange 30B). At this time, the force F acting on the building is generated in the direction of the arrow FH.

Further, in the present embodiment, the tensile strength is improved by the first fixing holes 20A and 20B of the second fixing portion and the first anchor bolts 28 of the second anchoring member. In addition, the diameter of the second fixing hole 20C and the second fixing hole 20D of the second fixing portion can be increased, and the axial diameter of the second anchor bolt 26 can be enlarged, and the second fixing portion and the second portion can be further improved. The tensile strength of the anchoring member as a whole.

Second Embodiment 柱 A column structure and a bottom member according to a second embodiment of the present invention will be described with reference to Fig. 6 . In the present embodiment and other embodiments to be described later, the same structures as those of the column structure 10 and the bottom member 16 of the first embodiment will be denoted by the same reference numerals, and the description of the configuration will be omitted because of the repetition. .

(column structure and structure of the bottom member) As shown in Fig. 6, in the column structure 40 and the bottom member 16 of the present embodiment, the first fixing hole 20A and the first fixing hole of the second fixing portion on the left side in the drawing are shown. The structure of the 20B and the structure of the first anchor bolt 42 of the second anchoring member are different from those of the first embodiment. In the other structures, the structures of the column structure 40 and the bottom member 16 of the present embodiment are the same as those of the column structure 10 and the bottom member 16 of the first embodiment.

Specifically, the column structure 40 and the first fixing hole 20A and the first fixing hole 20B of the bottom member 16 have a circular diameter of the same diameter as the first fixing hole 18A and the first fixing hole 18B of the first fixing portion. The hole is formed. Here, the first fixing hole 20A and the first fixing hole 20B are both the second fixing hole 20C of the second fixing portion, the second fixing hole 20D, the second fixing hole 18C of the first fixing portion, and the first fixing hole 18D. Set to the same diameter.

Then, the first anchor bolt 42 as the second anchoring member is formed of the same diameter as the first anchor bolt 24 and has a higher tensile strength than the first anchor bolt 24. The upper end portion 42C of the first anchor bolt 42 is provided with a male screw portion similarly to the upper end portion 24A of the first anchor bolt 24. The male screw portion of the first anchor bolt 42 that penetrates the first fixing hole 20A and the first fixing hole 20B is screwed to the nut 42G via a washer that is omitted from the drawing. Further, similarly to the first anchor bolt 24, a double nut and a fixing plate that is locked and fixed by the double nut are provided on the lower end side of the first anchor bolt 42 which is omitted from the drawing. Thereby, the bottom plate 16A is fixed to the upper end side of the first anchor bolt 42.

For example, when the anchor bolt is formed of the first 24 lines of a tensile strength of JIS G3138 is defined specifications 400N / mm ² of carbon steel, the first anchor bolt 42 by the tensile strength of the carbon-based 490N / mm ² of Formed by steel. Further, the first anchor bolt 42 may be formed of a stainless steel material having a higher tensile strength than the first anchor bolt 24.

Further, in the present embodiment, the second anchor bolt 26 as the second anchoring member may be formed of a material having a high tensile strength similarly to the first anchor bolt 42. Further, the length of the second anchor bolt 42 may be different from the length of the first anchor bolt 24 under the condition that the tensile strength of the first anchor bolt 42 is higher than that of the first anchor bolt 24.

(Effects of the second embodiment) In the column structure 40 and the bottom member 16 of the present embodiment, as shown in Fig. 6, the first anchor bolt 42 of the second anchor member is made of the first anchor. The first anchor bolt 24 of the member is formed of a material having a higher tensile strength. Therefore, the first anchor bolt 42 is formed of a material having a high tensile strength, and the tensile strength of the second anchor member can be improved, and the column bending strength of the column structure 40 can be further improved. improve.

Further, in addition to the above-described effects, the column structure 40 and the bottom member 16 of the present embodiment can obtain the same operational effects as those obtained by the column structure 10 and the bottom member 16 of the first embodiment.

 Third Embodiment FIG. 7 illustrates a column structure and a bottom member according to a third embodiment of the present invention.

(Structure of Column Structure and Bottom Member) As shown in Fig. 7, in the column structure 50 and the bottom member 16 of the present embodiment, the structure of the first fixing portion and the first anchor member on the right side in the drawing, and the diagram The structure of the second fixing portion and the second anchoring member on the left side differs from the structure of the first embodiment. In the other structures, the structures of the column structure 50 and the bottom member 16 of the present embodiment are the same as those of the column structure 10 and the bottom member 16 of the first embodiment.

In the column structure 50 and the first fixing portion of the bottom member 16, the first fixing hole 18A and the first fixing hole 18B (see FIGS. 1 and 2) are omitted, and only the second fixing hole 18C and the second fixing are omitted. The hole 18D is composed of two fixing holes. A second anchor bolt 24 as a first anchor member is provided in each of the second fixing hole 18C and the second fixing hole 18D.

On the other hand, the second fixing portion is composed of two fixing holes of the first fixing hole 20A and the first fixing hole 20B, and two fixing holes of the second fixing hole 20C and the second fixing hole 20D. Similarly to the first fixing hole 20A and the first fixing hole 20B (see FIG. 6) of the second embodiment, the first fixing hole 20A and the first fixing hole 20B are the same as the second fixing hole 20C and the second fixing hole 20C. The holes 20D are formed by through holes having the same diameter. Further, the first fixing hole 20A and the first fixing hole 20B have the same diameter as the second fixing hole 18C and the second fixing hole 18D of the first fixing portion. In the first fixing hole 20A, the first fixing hole 20B, the second fixing hole 20C, and the second fixing hole 20D, a total of four fixing holes are provided with a first anchor bolt 26 as a second anchoring member and a second anchoring member. Bolt 26. The first anchor bolt 26 and the second anchor bolt 26 have the same diameter and the same tensile strength. Further, the first anchor bolt 26 has the same diameter and the same tensile strength as the first anchor bolt 24 of the first anchoring member.

That is, in the column structure 50 and the bottom member 16 of the present embodiment, the second anchor member includes a larger number of the first anchor bolts 26 and the second anchor bolts 26 than the first anchor members.

(Effects of the third embodiment) The column structure 50 and the bottom member 16 of the present embodiment are composed of a larger number than the first anchor member as shown in Fig. 7 . Therefore, by changing the simple structure of the number (number) of the second anchor members, the tensile strength of the second anchor member can be increased, and the column bending strength of the column structure 50 can be improved.

Further, in addition to the above-described effects, the column structure 50 and the bottom member 16 of the present embodiment can obtain the same operational effects as those obtained by the column structure 10 and the bottom member 16 of the first embodiment.

Fourth Embodiment FIG. 8 illustrates a column structure and a bottom member according to a fourth embodiment of the present invention.

(Structure of Column Structure and Bottom Member) As shown in Fig. 8, in the column structure 60 and the bottom member 16 of the present embodiment, the center of the width direction (arrow FH direction) of the flange 30B of the bottom plate 16A is shown. At the position Bc, the center position Wc in the width direction of the flange 30B of the iron column 30 is shifted from the distance Los, and the bottom plate 16A is joined to the iron column 30. Here, the center position Bc is the center position of the top surface of the bottom plate 16A, and the center position Wc is the center position of the bottom surface of the iron column 30. In the present embodiment, the one end side of the bottom plate 16A on the upper side in the arrow FH direction is disposed outside the structure omitted from the drawing, and the other end side of the bottom plate 16A on the lower side in the arrow FH direction is disposed in the building. The inside. That is, the iron column 30 produces a side eccentricity to the maximum tensile axial force.

In the present embodiment, the first fixing hole 18A and the first fixing hole 18B as the first fixing portion are provided on one end side of the bottom plate 16A, and the second fixing hole 18C and the second fixing hole 18D are provided. Fixed holes. The positions of the central axes of the first fixing holes 18A, the first fixing holes 18B, the second fixing holes 18C, and the second fixing holes 18D coincide with each other in the direction of the arrow WH, and the first fixing holes 18A and the like have the same diameter. The first fixing hole 18A is disposed on the side of the flange 30B opposite to the side of the web 30A. The first fixing hole 18B is disposed on the inner side in the width direction of the web 30A than the first fixing hole 18A, and is disposed on the side of the web 30A of the flange 30B. The second fixing hole 18D is disposed on the side of the flange 30B opposite to the side of the web 30A. The second fixing hole 18C is disposed on the inner side in the width direction of the web 30A than the second fixing hole 18D, and is disposed on the side of the web 30A of the flange 30B.

The first anchoring bolts 24 as the first anchoring members are provided in the first fixing holes 18A and the first fixing holes 18B, and the first anchoring members are provided in the second fixing holes 18C and the second fixing holes 18D. 2 anchor bolts 24. The first anchor bolt 24 and the second anchor bolt 24 have the same diameter and have the same tensile strength.

On the other hand, the other fixing hole 20A and the first fixing hole 20B as the second fixing portion are provided on the other end side of the bottom plate 16A, and the second fixing hole 20C and the second fixing hole 20D are provided. Fixed holes. The positions of the central axes of the first fixing holes 20A, the first fixing holes 20B, the second fixing holes 20C, and the second fixing holes 20D are aligned in the direction of the arrow WH, and the first fixing holes 20A and the like have the same diameter. In addition, the first fixing hole 20A of the second fixing portion and the like have the same diameter as the first fixing hole 18A of the first fixing portion. The first fixing hole 20A is disposed on the side of the flange 30B opposite to the web 30A side, and the position of the central axis of the first fixing hole 20A coincides with the position of the central axis of the first fixing hole 18A in the direction of the arrow FH. The first fixing hole 20B is disposed on the inner side in the width direction of the web 30A than the first fixing hole 20A, and is disposed on the side of the web 30A of the flange 30B. The position of the central axis of the first fixing hole 20B coincides with the position of the central axis of the first fixing hole 18B in the direction of the arrow FH. The second fixing hole 20D is disposed on the side of the flange 30B opposite to the web 30A side, and the position of the central axis of the second fixing hole 20D coincides with the position of the central axis of the second fixing hole 18D in the direction of the arrow FH. Then, the second fixing hole 20C is disposed on the inner side in the width direction of the web 30A than the second fixing hole 20D, and is disposed on the side of the web 30A of the flange 30B.

The first anchoring bolts 26 are provided as the second anchoring members 26 in the first fixing holes 20A and the first fixing holes 20B, and the second anchoring members are provided in the second fixing holes 20C and the second fixing holes 20D. 2 anchor bolts 26. The first anchor bolt 26 and the second anchor bolt 26 have the same diameter and form the same tensile strength. Further, the first anchor bolts 26 have the same diameter and the same tensile strength with respect to the first anchor bolts 24. Further, the first anchor bolt 24, the second anchor bolt 24, the first anchor bolt 26, and the second anchor bolt 26 are all disposed at equal distances from the center position Bc of the bottom plate 16A.

(Effects of the fourth embodiment) The column structure 60 and the bottom member 16 of the present embodiment are provided with flanges 30B integrally formed on both sides in the width direction of the web 30A as shown in Fig. 8 . The iron column 30 is joined on the upper side of the bottom plate 16A. Further, the lower end sides of the first anchoring member and the second anchoring member are fixed to the base 12, and the bottom plate 16A is fixed to the upper end sides of the first anchoring member and the second anchoring member.

Here, the first anchor bolt 24 of the first anchoring member, the second anchor bolt 24, the first anchor bolt 26 of the second anchoring member, and the second anchor bolt 26 have the same tensile strength. Further, the upper end sides of the first anchor bolt 24 and the second anchor bolt 24 are fixed to one end side of the bottom plate 16A in the direction of the arrow FH, and the upper end sides of the first anchor bolt 26 and the second anchor bolt 26 are fixed to each other. The other end side of the bottom plate 16A in the direction of the arrow FH. Then, since the center position Wc of the iron column 30 is eccentric with respect to the center position Bc of the bottom plate 16A in the width direction of the flange 30B, the portion of the bottom plate 16A where the iron column 30 is eccentric (the other end side of the bottom plate 16A) is The iron column 30 is reinforced. For example, when the horizontal force (the force F shown in FIGS. 1, 3, and 4) is applied to the iron column 30 from the opposite side of the eccentric direction of the iron column 30, the iron column 30 at the bottom plate 16A is The eccentric portion produces a large tensile axial force on the iron column 30 in the direction of the arrow UP. This large tensile axial force is effectively suppressed by the eccentricity of the iron column 30 of the bottom plate 16A and the reinforced portion. Therefore, even if the tensile strengths of the first anchoring member and the second anchoring member are equal (even if they are not changed), the column structure 60 can be formed by eccentrically joining the skeletal column 30 to the bottom plate 16A. The bending strength of the column foot is increased.

Further, in addition to the above-described effects, the column structure 60 and the bottom member 16 of the present embodiment can obtain the same operational effects as those obtained by the column structure 10 and the bottom member 16 of the first embodiment.

Further, the column structure 60 and the bottom member 16 of the present embodiment may have a structure in which the center position Bc of the bottom plate 16A coincides with the center position of the column member Wc, and both positions are eccentric in the arrow WH direction. At this time, the iron column 30 is eccentric to the outer side of the structure with respect to the bottom plate 16A. The first fixing hole 18A, the first fixing hole 18B, the first fixing hole 20A, and the first fixing hole 20B are disposed inside the structure, and the first anchor bolt 24 and the first anchor bolt 26 are provided. Further, on the outer side of the structure, the second fixing hole 18C, the second fixing hole 18D, the second fixing hole 20C, and the second fixing hole 20D are disposed, and the second anchor bolt 24 and the second anchor bolt 26 are provided.

Fifth Embodiment 柱 A column structure and a bottom member according to a fifth embodiment of the present invention will be described with reference to Fig. 9 . This embodiment is a modified example of the column structure 60 and the bottom member 16 of the fourth embodiment.

(Column Structure and Structure of Bottom Member) As shown in Fig. 9, in the column structure 70 and the bottom member 16 of the present embodiment, the first fixing portion is disposed opposite to the web 30A side of the flange 30B. The first fixing hole 18A and the first fixing hole 18B on the one side are formed by two fixing holes. The first anchoring bolt 24 as the first anchoring member is provided in the first fixing hole 18A and the first fixing hole 18B.

On the other hand, the second fixing portion is constituted by two fixing holes that are disposed on the side of the web 30A of the flange 30B and the second fixing hole 20G and the second fixing hole 20H. The second anchoring bolt 26 as the second anchoring member is provided in the second fixing hole 20G and the second fixing hole 20H. The second anchor bolt 26 has the same diameter as the first anchor bolt 24 and has the same tensile strength.

In the bottom plate 16A of the present embodiment, the second fixing hole 20G and the second fixing hole 20H are disposed on the web 30A side of the flange 30B, and the side region 16B of the flange 30B opposite to the web 30A side is Omitted. As a result, the iron column 30 is eccentric to the left side in the width direction (arrow WH direction) of the web 30A with respect to the bottom plate 16A. The eccentric side of the iron column 30 is the outer side of the structure.

(Effects of the fifth embodiment) The column structure 70 and the bottom member 16 of the present embodiment are fixed to the bottom plate 16A as the upper end side of the second anchor bolt 26 as the second anchor member as shown in Fig. 9 . The flange 30B of the middle is on the side of the web 30A. Therefore, the region 16B of the flange 30B of the bottom plate 16A opposite to the web 30A can be omitted.

When the region 16B of the bottom plate 16A is omitted, the center position of the same direction of the iron column 30 moves toward the other end side of the bottom plate 16A with respect to the center position of the bottom plate 16A in the arrow WH direction. Thereby, the center position of the iron column 30 can be simply eccentric with respect to the center position of the bottom plate 16A.

Further, in the column structure 70 and the bottom member 16 of the present embodiment, since the region 16B of a part of the bottom plate 16A is omitted (the portion of the bottom plate 16A which is the outer side of the structure is reduced), the bottom plate 16A can be made lighter. Furthermore, since the material necessary for the production of the bottom plate 16A can be reduced, the manufacturing cost of the column structure 70 and the bottom member 16 can be reduced.

Further, in the column structure 70 and the bottom member 16 of the present embodiment, since the region 16B of the side of the flange 30B in the bottom plate 16A opposite to the web 30A side is omitted, the iron column 30 can be brought close to the adjacent boundary. At the office. In this way, the base of the building can be effectively utilized.

(Embodiment 6) A column structure and a bottom member according to a sixth embodiment of the present invention will be described with reference to Fig. 10 . This embodiment is a modified example of the column structure 70 and the bottom member 16 of the fifth embodiment.

(Structure of Column Structure and Bottom Member) As shown in Fig. 10, in the column structure 80 of the present embodiment, the bottom plate 16A of the bottom member 16 is provided with a notch portion 16F and a notch portion 16G.

Specifically, the notch portion 16F is formed on one end side of the bottom plate 16A in the direction of the arrow FH, and a part of the bottom plate 16A is cut along the web 30A between the pair of flanges 30B. The notch portion 16F is a U-shape (rectangular shape) that opens to one end side of the bottom plate 16A in plan view.

On the other hand, the notch portion 16G is formed on the other end side of the bottom plate 16A in the direction of the arrow FH, and a part of the bottom plate 16A is cut along the web 30A between the pair of flanges 30B. The notch portion 16G has a U-shape (rectangular shape) that is symmetrical with the notch portion 16F and opens to the other end side of the bottom plate 16A in plan view.

A portion of the bottom plate 16A is provided between the notch portion 16F and the notch portion 16G, and this portion is joined to the web 30A. The overall planar shape of the bottom plate 16A is H-shaped in this embodiment.

(Effects of the sixth embodiment) The column structure 80 and the bottom member 16 of the present embodiment are provided with a notch portion 16F and a notch portion 16G in the bottom plate 16A as shown in Fig. 10 . Thereby, since the portion corresponding to the notch portion 16F and the notch portion 16G of the bottom plate 16A is removed, the bottom plate 16A can be made lighter.

Further, in addition to the above-described effects, the column structure 80 and the bottom member 16 of the present embodiment can obtain the same operational effects as those obtained by the column structure 70 and the bottom member 16 of the fifth embodiment.

Further, the present embodiment can also be applied to any of the column structure 10 and the bottom member 16 of the first embodiment to the column structure 60 and the bottom member 16 of the fourth embodiment. Further, the planar shape of the notch portion 16F and the notch portion 16G is not limited to the U shape, and may be, for example, a trapezoidal shape or a circular arc shape. Further, a slit may be formed instead of the notch portion.

Seventh Embodiment A column structure and a bottom member according to a seventh embodiment of the present invention will be described with reference to Fig. 11 . This embodiment is a modified example of the column structure 70 and the bottom member 16 of the fifth embodiment.

(Structure of Column Structure and Bottom Member) As shown in Fig. 11, in the column structure 90 of the present embodiment, the bottom member 16 is composed of a first bottom member and a second bottom member. The first bottom member includes a first bottom plate 16C as a bottom body, and the second bottom member includes a second bottom plate 16D as a bottom body.

In detail, the first bottom plate 16C has a rectangular flat plate shape with the arrow FH direction being the longitudinal direction and the arrow WH direction being the short side direction. The flange 30B on one side of the iron column 30 is joined to the upper end side of the first bottom plate 16C. In addition, on the side opposite to the web 30A side of the flange 30B of the first bottom plate 16C, two fixing holes, that is, the first fixing hole 18A and the first fixing hole 18B as the first fixing portion are disposed. The first anchoring bolt 24 as the first anchoring member is provided in the first fixing hole 18A and the first fixing hole 18B.

On the other hand, the second bottom plate 16D has a rectangular flat plate shape with the arrow FH direction being the longitudinal direction and the arrow WH direction being the short side direction. The second bottom plate 16D and the first bottom plate 16C are provided with a space therebetween. The flange 30B on the other side of the iron column 30 is joined to the upper end side of the second bottom plate 16D. In addition, two fixing holes of the second fixing hole 20G and the second fixing hole 20H as the second fixing portion are disposed on the web 30A side of the flange 30B of the second bottom plate 16D. The second anchoring bolt 26 as the second anchoring member is provided in the second fixing hole 20G and the second fixing hole 20H.

(Effects of the seventh embodiment) The column structure 90 and the bottom member 16 of the present embodiment are combined with the flange 30B of one side of the iron column 30 as the first base member as shown in Fig. 11 . The first bottom plate 16C and the second bottom plate 16D as the second bottom member are coupled to the other flange 30B. Then, the first bottom plate 16C and the second bottom plate 16D are spaced apart from each other. Therefore, the area of the bottom member 16 is reduced by the interval between the first bottom plate 16C and the second bottom plate 16D. In the figure, the area enclosed by the symbol 16E and surrounded by the broken line is removed. Therefore, the bottom member 16 reduces the portion corresponding to the region 16E. In addition, the material necessary for the production of the bottom member 16 can be reduced. Furthermore, the manufacturing cost of the column structure 90 and the bottom member 16 can be reduced.

Further, in the column structure 90 and the bottom member 16 of the present embodiment, since the region 16B on the side opposite to the web 30A side of the flange 30B in the second bottom plate 16D is omitted, the iron column 30 can be brought close to Adjacent boundary. Therefore, the base of the building can be effectively utilized.

Further, the present embodiment can also be applied to any of the column structure 10 and the bottom member 16 of the first embodiment to the column structure 60 and the bottom member 16 of the fourth embodiment. Specifically, for example, in the column structure 10 and the bottom member 16 of the first embodiment, the bottom plate 16A is divided into the first bottom plate 16C and the second bottom plate 16D.

Other Embodiments The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention. For example, in the first embodiment shown in FIG. 2, four fixing portions or anchor members are provided in the width direction of the flange at both end portions in the width direction of the web in the bottom member. However, in the present invention, three or more fixing portions or anchor members may be provided at one end portion and the other end portion of the bottom member in the longitudinal direction. In the case of a minimum of three fixing portions or anchoring members, one fixing portion or anchoring member is provided at a central portion in the width direction of the flange, and one end portion is provided at both ends in the width direction of the flange. Fixing or anchoring member. Further, in the case of a minimum of three fixing portions or anchor members, two fixing portions or anchor members may be provided at the center portion in the width direction of the flange, and at both ends in the width direction of the flange. One of them is provided with one fixing portion or an anchoring member. Furthermore, in the present invention, the anchoring member having a high tensile strength outside the structure may be one or three or more.

10‧‧‧column structure
12‧‧‧ Foundation
14‧‧ ‧ Mud
16A‧‧‧ bottom plate (bottom body)
16B‧‧‧Area
16C‧‧‧1st bottom plate (1st bottom member)
16D‧‧‧2nd bottom plate (2nd bottom member)
16E‧‧‧Area
16F‧‧‧Gap section
16G‧‧‧Gap section
16H‧‧‧Connecting Department
16‧‧‧ bottom member
18A‧‧‧1st fixing hole (1st fixing part)
18B‧‧‧1st fixing hole (1st fixing part)
18C‧‧‧2nd fixing hole (1st fixing part)
18D‧‧‧2nd fixing hole (1st fixing part)
20A‧‧‧1st fixing hole (2nd fixing part)
20B‧‧‧1st fixing hole (2nd fixing part)
20C‧‧‧2nd fixing hole (2nd fixing part)
20D‧‧‧2nd fixing hole (2nd fixing part)
20G‧‧‧2nd fixing hole (2nd fixing part)
20H‧‧‧2nd fixing hole (2nd fixing part)
2‧‧‧ recess
24A‧‧‧ anchored ontology
24B‧‧‧Bottom
24C‧‧‧Upper
24D‧‧‧ nuts
24E‧‧‧ nuts
24F‧‧‧ fixed plate
24G‧‧‧ nuts
24H‧‧‧ Washer
24‧‧‧1st anchor bolt or 2nd anchor bolt (1st anchoring member or 2nd anchoring member)
26A‧‧‧ anchored ontology
26B‧‧‧Bottom
26C‧‧‧Upper end
26D‧‧‧ nuts
26E‧‧‧ nuts
26F‧‧‧ fixing plate
26G‧‧‧ nuts
26H‧‧‧ Washer
26‧‧‧1st anchor bolt or 2nd anchor bolt (1st anchoring member or 2nd anchoring member)
28A‧‧‧ anchored ontology
28B‧‧‧Bottom
28C‧‧‧Upper end
28D‧‧‧ nuts
28E‧‧‧ nuts
28F‧‧‧fixed board
28G‧‧‧ nuts
28H‧‧‧ Washer
28‧‧‧1st anchor bolt (2nd anchoring member)
30A‧‧‧ web
30B‧‧‧Flange
30‧‧‧ Iron column (column member)
32A‧‧‧ web
32B‧‧‧Flange
32‧‧‧1st beam member
34A‧‧‧ web
34B‧‧‧Flange
34‧‧‧2nd beam member
36A‧‧‧ web
36B‧‧‧Flange
36‧‧‧3rd beam member
40‧‧‧column structure
42A‧‧‧ anchored ontology
42G‧‧‧ nuts
42‧‧‧1st anchor bolt (2nd anchoring member)
50‧‧‧column structure
60‧‧‧column structure
70‧‧‧column structure
80‧‧‧column structure
90‧‧‧column construction
AA‧‧‧ hatching
Bc‧‧‧ central location
FH‧‧‧Flange width direction
F‧‧‧ force
Los‧‧‧Distance
L‧‧‧ separation distance
P1‧‧‧ separation distance
P2‧‧‧ separation distance
Sp‧‧‧Compressed axial force
St‧‧‧ tensile axial force
T‧‧‧thickness
UP‧‧‧Up direction
Wc‧‧‧ central location
WH‧‧‧ web width direction
W‧‧‧Width

Fig. 1 is a cross-sectional view showing a column structure and a bottom member according to a first embodiment of the present invention as seen from the width direction of the flange (cut along the line A-A shown in Fig. 2). Fig. 2 is a plan view showing a column structure and a bottom member according to a first embodiment. Fig. 3 is a schematic side view showing a column structure and a structure to which the bottom member is applied in the first embodiment. Fig. 4 is an enlarged side elevational view showing the main part of the structure shown in Fig. 3. Fig. 5 is a graph showing the relationship between the axial force of the column member and the bending strength of the column in the column structure and the bottom member of the first embodiment. Fig. 6 is a plan view corresponding to Fig. 2 of a column structure and a bottom member according to a second embodiment of the present invention. Fig. 7 is a plan view corresponding to Fig. 2 of a column structure and a bottom member according to a third embodiment of the present invention. Fig. 8 is a plan view corresponding to Fig. 2 of a column structure and a bottom member according to a fourth embodiment of the present invention. Fig. 9 is a plan view corresponding to Fig. 2 of a column structure and a bottom member according to a fifth embodiment of the present invention. Fig. 10 is a plan view corresponding to Fig. 2 of a column structure and a bottom member according to a sixth embodiment of the present invention. Fig. 11 is a plan view corresponding to Fig. 2 of a column structure and a bottom member according to a seventh embodiment of the present invention.

10‧‧‧column structure

12‧‧‧ Foundation

14‧‧ ‧ Mud

16A‧‧‧ bottom plate (bottom body)

16‧‧‧ bottom member

18B‧‧‧1st fixing hole (1st fixing part)

18D‧‧‧2nd fixing hole (1st fixing part)

20B‧‧‧1st fixing hole (2nd fixing part)

20D‧‧‧2nd fixing hole (2nd fixing part)

22‧‧‧ recess

24A‧‧‧ anchored ontology

24B‧‧‧Bottom

24C‧‧‧Upper

24D‧‧‧ nuts

24E‧‧‧ nuts

24F‧‧‧ fixed plate

24G‧‧‧ nuts

24H‧‧‧ Washer

24‧‧‧1st anchor bolt or 2nd anchor bolt (1st anchoring member)

26A‧‧‧ anchored ontology

26B‧‧‧Bottom

26C‧‧‧Upper end

26D‧‧‧ nuts

26E‧‧‧ nuts

26F‧‧‧ fixing plate

26G‧‧‧ nuts

26H‧‧‧ Washer

26‧‧‧2nd anchor bolt (2nd anchoring member)

28A‧‧‧ anchored ontology

28B‧‧‧Bottom

28C‧‧‧Upper end

28D‧‧‧ nuts

28E‧‧‧ nuts

28F‧‧‧fixed board

28G‧‧‧ nuts

28H‧‧‧ Washer

28‧‧‧1st anchor bolt (2nd anchoring member)

30A‧‧‧ web

30B‧‧‧Flange

30‧‧‧ Iron column (column member)

F‧‧‧ force

L‧‧‧ separation distance

St‧‧‧ tensile axial force

T‧‧‧thickness

UP‧‧‧Up direction

WH‧‧‧ web width direction

Claims (14)

A column structure comprising: a column member provided with a flange integrally formed on both sides in a width direction of a web; a bottom member coupled to the column member on an upper side; and a first anchor member fixed at a lower end side thereof a foundation, and an upper end side thereof is fixed to the web or one end side of the flange in the width direction; and a second anchoring member, the lower end side of which is fixed to the base, and the upper end side thereof is fixed to the bottom member The web or the other end side of the flange in the width direction is higher in tensile strength than the first anchor member. The column structure of claim 1, wherein the second anchor member has a shaft diameter larger than a shaft diameter of the first anchor member. The column structure of claim 1, wherein the second anchoring member is formed of a material having a higher tensile strength than the first anchoring member. The column structure of claim 1, wherein the second anchoring member is composed of a larger number than the first anchoring member. The column structure of claim 1, wherein the first anchoring member or the second anchoring member comprises: a first anchoring bolt, wherein the upper end side of the flange is fixed in the bottom member a side opposite to the web side; and a second anchor bolt having an upper end side fixed to the bottom member at a position inward of a width direction of the web than the first anchor bolt, and being higher than the first anchor The fixing bolt is closer to the flange. The column structure of claim 1, wherein the first anchoring member is disposed inside the structure, and the second anchoring member is disposed outside the building. A column structure comprising: a column member provided with a flange integrally formed on both sides in a width direction of a web; a bottom member coupled to the column member on an upper side, the center position of the column member being opposite to the bottom body The center position is eccentric to the width direction of the web or the flange; the first anchoring member has a lower end side fixed to the base, and an upper end side thereof is fixed to one end side of the web in the width direction of the bottom member; 2 anchoring member, the lower end side of which is fixed to the foundation, and the upper end side thereof is fixed to the web of the bottom member or the other end side of the flange in the width direction, and has the same stretching as the first anchoring member strength. The column structure of claim 7, wherein the upper end side of the first anchoring member is fixed to the side of the flange in the bottom member opposite to the web side, the second anchoring member The upper end side is fixed to the web side of the flange in the bottom member. The column structure of claim 1 or 7, wherein the bottom member has a notch portion that is partially cut along the web. The column structure of claim 1 or 7, wherein the bottom member comprises: a first bottom member coupled to the flange on one side and fixed to an upper end side of the first anchor member; And a second bottom member that is coupled to the flange on the upper side and fixed to the upper end side of the second anchoring member, and is provided at a distance from the first bottom member. A bottom member comprising: a bottom body coupled to a column member provided with a flange integrally formed on both sides in a width direction of a web on an upper side; a first fixing portion provided on the web of the bottom body Or one end side of the flange in the width direction, and fixed to the upper end side of the first anchoring member fixed to the base on the lower end side; and a second fixing portion provided on the web or the width of the flange of the bottom body The other end side of the direction is fixed to the upper end side of the second anchoring member which is fixed to the base at the lower end side and has a higher tensile strength than the first anchoring member. A bottom member comprising: a bottom body coupled to a column member provided with a flange integrally formed on both sides in a width direction of a web on an upper side thereof, the center position of the column member being toward the web or the flange The first fixing portion is provided on one end side of the bottom body in the width direction of the bottom body, and is fixed to an upper end side of the first anchoring member fixed to the base on the lower end side, and a second fixing portion. It is provided on the other end side of the web in the width direction of the bottom body, and is fixed to the upper end side of the second anchoring member which is fixed to the base at the lower end side and has the same tensile strength as the first anchoring member. The bottom member of claim 11 or 12, wherein the bottom body has a notch portion that is partially cut along the web. The bottom member of claim 11 or 12, wherein the bottom body comprises: a first bottom body coupled to the flange on one side and fixed to an upper end side of the first anchor member; And a second bottom body that is coupled to the flange on the upper side and fixed to the upper end side of the second anchoring member, and is provided at a distance from the first bottom body.