JP6679277B2 - Steel foundation beam structure - Google Patents

Description

  One aspect of the present invention relates to a steel foundation beam structure.

  In a steel-framed beam structure of a building, a steel bundle is joined to a concrete foundation. In this case, an anchor bolt protruding from the upper surface of the foundation is passed through a hole provided in the base plate of the bundle, and the bundle is joined to the foundation by a nut attached to the anchor bolt. Such a configuration in which the bundle is joined to the foundation using the anchor bolt is described in, for example, Patent Document 1.

JP-A-8-60676

  Here, when joining a bundle to a foundation using only anchor bolts and nuts, the size of the holes that can be provided in the base plate of the bundle is stipulated by law (for example, up to +5 mm relative to the diameter of the anchor bolt). Large diameter holes can be drilled.) As described above, since there is a limit on the size of the holes that can be provided in the bundle base plate, it is difficult to absorb the horizontal installation error of the foundation by the size of the holes provided in the bundle base plate. .

  Then, one side of this invention aims at providing the steel-frame foundation beam structure which can absorb the construction error of the horizontal direction of a foundation easily.

One aspect of the present invention is a steel-frame foundation beam structure in which a connecting member is joined on a foundation other than a pile foundation , the foundation being fixed to a concrete portion, an embedded portion embedded in the concrete portion, and the embedded portion. And a steel member having a sheer cotter protruding from the upper surface of the concrete portion, and the sheer cotter is formed to have a smaller diameter than the embedded portion, and the connecting member has a tubular portion surrounding the perimeter of the sheer cotter, and by the tubular portion. The sheer cotter is installed on the foundation so as to be surrounded, and the steel member and the connecting member are joined to each other by the mortar filled in the tubular portion.

  In this steel-frame foundation beam structure, the bundle can be moved in the horizontal direction by the gap between the tubular portion of the bundle and the shear cotter of the steel member. For this reason, the size of the cylindrical portion can be set to a size that can absorb the horizontal installation error of the foundation (shear cotter displacement), and the connection member can be positioned at the predetermined position while absorbing the installation error. Can be installed in In this way, there is no restriction (the restriction on the size of the hole in the base plate through which the anchor bolt passes) that is required when fixing the bundle to the foundation using only the anchor bolts and nuts. It is possible to easily absorb the construction error in the horizontal direction of the foundation simply by forming it in a size that can be absorbed.

  The sheer cotter is a cotter body portion that projects upward from the embedded portion, and a cotter side plate portion that is provided at the upper end of the cotter body portion and that has a cotter protrusion portion that extends outward from the outer surface of the cotter body portion. The tubular portion is provided at the lower end of the tubular body portion surrounding the sheer cotter, and a tubular overhanging portion that projects from the inner peripheral surface of the tubular body portion toward the inside of the tubular body portion. And a cylinder side plate portion having. For example, when a force that pulls out the connecting member from the foundation is applied to the connecting member, a compressive force acts on the mortar filled between the cotter overhanging portion and the tube overhanging portion. That is, the mortar filled between the cotter overhanging portion and the tube overhanging portion resists the force of pulling out the connecting member from the foundation. As described above, the steel-frame foundation beam structure includes the cotter overhanging portion and the tubular overhanging portion, so that it is possible to further prevent the connecting member from being pulled out.

Another aspect of the present invention is a steel foundation beam structure in which a connecting member is joined on a foundation other than a pile foundation , the foundation is embedded in a concrete portion and a concrete portion so that an upper surface is exposed, A steel member having a tubular portion extending downward from the upper surface, and the connecting member has a sheer cotter protruding downward, and the sheer cotter is mounted on the foundation so as to be inserted into the tubular portion. The steel member and the connecting member are joined to each other by mortar filled in the tubular portion.

  In this steel foundation beam structure, the size of the tubular part is formed to a size that can absorb the horizontal construction error of the foundation (shear cotter displacement), and the connection member is absorbed while the construction error is absorbed. Can be installed in place. For this reason, there is no limit like the size of the hole in the base plate when fixing the connecting member to the foundation using only the anchor bolts and nuts, so the size of the cylinder is made large enough to absorb construction errors. Only by doing so, it is possible to easily absorb the horizontal construction error of the foundation.

  The tubular portion is provided with a tubular body portion surrounding the shear cotter and a tubular overhanging portion provided at an upper end of the tubular body portion and projecting from the inner peripheral surface of the tubular body portion toward the inside of the tubular body portion. The side cotter is provided, and the sheer cotter is a cotter main body that projects downward, and a cotter that is provided at the lower end of the cotter main body and has a cotter overhanging portion that projects outward from the outer surface of the cotter main body. And a side plate portion. For example, when a force that pulls out the connecting member from the foundation is applied to the connecting member, a compressive force acts on the mortar filled between the cotter overhanging portion and the tube overhanging portion. That is, the mortar filled between the cotter overhanging portion and the tube overhanging portion resists the force of pulling out the connecting member from the foundation. As described above, the steel-frame foundation beam structure can suppress the connecting member from being pulled out by including the cotter overhanging portion and the tubular overhanging portion.

  The foundation further comprises an anchor bolt having a lower end embedded in the concrete portion and an upper end protruding from the upper surface of the steel member, and the connecting member is connected to the steel member by the anchor bolt and a nut attached to the anchor bolt. May be. In this way, by further connecting the connecting member and the steel member using the anchor bolt or the like, the connecting member and the steel member can be joined more firmly.

  The connecting member may be a pillar or a bundle. In this case, even if the foundation has a construction error in the horizontal direction, the pillar or the bundle can be bonded to a predetermined position on the foundation while easily absorbing the construction error of the foundation.

  The connecting member is a bundle, and may further include columns and beams connected to the bundle. In this case, even if there is a horizontal construction error in the foundation, it is possible to join the bundle in which the columns and beams are connected to a predetermined position on the foundation while easily absorbing the construction error of the foundation. .

  According to various aspects of the present invention, a construction error in the horizontal direction of the foundation can be easily absorbed.

It is sectional drawing which shows schematic structure around the junction part of the bundle of buildings and a foundation which concerns on 1st embodiment. FIG. 2A is a front view of the steel member. FIG. 2B is a top view of the steel member. FIG. 3A is a front view of the bundle. FIG. 3B is a sectional view taken along the line IIIb-IIIb in FIG. It is sectional drawing which shows the state in which the steel member and the bundle were connected. It is sectional drawing which shows schematic structure around the junction part of the bundle of buildings and a foundation which concerns on 2nd embodiment. FIG. 6A is a front view of the steel member. FIG. 6B is a top view of the steel member. FIG. 7A is a front view of the bundle. FIG. 7B is a sectional view taken along the line VIIb-VIIb in FIG. It is sectional drawing which shows the state in which the steel member and the bundle were connected.

  Hereinafter, an embodiment of a building to which the steel-framed beam structure of the present invention is applied will be described with reference to the drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description.

(First embodiment)
A building according to the first embodiment to which the steel-frame foundation beam structure of the present invention is applied will be described. A building X1 shown in FIG. 1 is a steel-framed house including a foundation 1 and an upper structure 2 built on the foundation 1. The foundation 1 has a concrete portion 11 and a steel member 12. The foundation 1 has members such as reinforcing bars in addition to the concrete portion 11 and the steel member 12. As long as the foundation 1 has at least the concrete portion 11 and the steel member 12, various foundation structures such as a cloth foundation can be adopted.

  The upper structure 2 is composed of a plurality of bundles (coupling members) 21, a plurality of columns 22, and a plurality of beams 23 erected between adjacent columns 22 or between adjacent bundles 21. . The bundle 21 of the upper structure 2 is joined to the steel member 12 of the foundation 1. The upper structure 2 is supported by the foundation 1.

  Next, details of each part around the joint between the foundation 1 and the upper structure 2 will be described. As shown in FIGS. 2A and 2B, the steel member 12 has a buried portion 110 and a shear cotter 120. The embedded portion 110 has a top plate portion 111, a bottom plate portion 112, a plurality of columns 113, and a plurality of connecting members 114. The top plate portion 111 is arranged above the bottom plate portion 112. The top plate portion 111 and the bottom plate portion 112 are connected by a column 113. The connecting member 114 connects the columns 113 adjacent to each other in the horizontal direction. As shown in FIG. 1, the embedded portion 110 is embedded in the concrete portion 11 such that the upper surface of the top plate portion 111 is exposed on the upper surface of the concrete portion 11.

  The bundle 21 is placed on the upper surface of the top plate portion 111. The bottom plate portion 112 may be connected to a concrete body (for example, discarded concrete) arranged on the bottom portion of the foundation 1. Note that the embedded portion 110 may have a structure other than the above-described structure as long as it has the top plate portion 111 on which the bundle 21 is placed.

  The shear cotter 120 is fixed to the upper surface of the top plate portion 111. The sheacotter 120 projects from the upper surface of the concrete portion 11 (see FIG. 1). The sheer cotter 120 has a cotter body 121 and a cotter side plate 122. The cotter body 121 is a member that projects upward from the upper surface of the top plate 111. In this embodiment, the cross-sectional shape of the cotter body 121 in the horizontal direction is a cross shape.

  The cotter side plate portion 122 is fixed to the upper end of the cotter body portion 121. The cotter side plate portion 122 has a cotter overhanging portion 122a overhanging outward from the outer surface 121a of the cotter body 121. That is, when viewed along the vertical direction, the portion of the cotter side plate portion 122 that is not connected to the cotter body portion 121 becomes the cotter overhang portion 122a. The lower surface of the cotter overhanging portion 122a faces the upper surface of the top plate portion 111.

  Note that the cotter body 121 may have a shape other than a cross shape in cross section. Further, the shape of the cotter side plate portion 122 is a quadrangle in FIG. 2B, but the cotter side plate portion 122 may have a shape other than the quadrangle as long as it has the cotter overhang portion 122a.

  As shown in FIGS. 3A and 3B, the bundle 21 has a connecting portion 210 and a tubular portion 220. The connecting part 210 is formed in a rectangular tube shape having a hole 210a therein. The hole 210a inside the connecting portion 210 extends along the vertical direction. The pillar 22 is connected to the upper end of the connecting portion 210 (see FIG. 1). The beam 23 is connected to the side surface of the connecting portion 210.

  The tubular portion 220 has a tubular body portion 221 and a tubular side plate portion 222. The horizontal cross-sectional shape of the cylinder body 221 is a rectangular frame shape. The upper end of the cylinder body 221 is fixed to the lower end of the connecting portion 210. Hereinafter, the space surrounded by the cylinder body 221 is referred to as an internal space R.

  The cylinder side plate portion 222 is fixed to the lower end of the cylinder body portion 221. The cylindrical side plate portion 222 is provided with a square insertion hole 222a. The insertion hole 222a of the cylinder side plate portion 222 and the internal space R of the cylinder body portion 221 communicate with each other. The cylinder side plate portion 222 has a cylinder overhanging portion 222b that projects from the inner peripheral surface of the cylinder body portion 221 toward the inside of the cylinder body portion 221. The upper surface of the cylinder overhanging portion 222b faces the inner space R side of the cylinder main body 221. That is, the insertion hole 222a is formed by the tip end portion of the tube overhanging portion 222b that projects inwardly of the tube body 221.

  The insertion hole 222a is formed in a size that allows the shear cotter 120 to be inserted therethrough. The cylinder body 221 is formed in a size capable of enclosing the periphery of the shear cotter 120.

  Next, a configuration for joining the bundle 21 and the foundation 1 will be described. As shown in FIG. 4, the bundle 21 is placed on the top plate portion 111 of the steel member 12. At this time, the bundle 21 is placed on the top plate portion 111 such that the periphery of the shear cotter 120 is surrounded by the cylinder body portion 221. The mortar M is filled in the cylinder main body 221 in a state where the bundle 21 is placed on the top plate 111. The bundle 21 and the steel member 12 are joined to each other by a mortar M filled in the tube body 221.

  As a work procedure, for example, an operator places the bundle 21 on the top plate portion 111 so that the bundle 21 is arranged at a predetermined position. The operator can adjust the arrangement position by moving the bundle 21 in the horizontal direction by the amount of the gap between the tubular portion 220 of the bundle 21 and the shear cotter 120 of the steel member 12. After that, the worker fills the mortar M from the upper part of the bundle 21 through the hole 210a of the connecting portion 210 into the cylinder main body 221 and joins the bundle 21 and the steel member 12 together. In addition, holes may be provided in the cotter side plate portion 122 of the shear cotter 120. In this case, when filling the mortar M, the mortar M can be easily filled in the tubular portion 220.

  The present embodiment is configured as described above, and in this steel foundation beam structure, the bundle 21 is horizontally moved and arranged by the gap between the tubular portion 220 of the bundle 21 and the shear cotter 120 of the steel member 12. The position can be adjusted. Therefore, the size of the cylindrical portion 220 is formed to a size that can absorb a horizontal installation error of the foundation 1 (positional deviation of the shear cotter 120), and the bundle 21 is absorbed while absorbing the installation error. It can be installed in place. As described above, since there is no restriction (a restriction on the size of the hole of the base plate through which the anchor bolt is passed) as in the case where the bundle is fixed to the foundation using only the anchor bolt and the nut, the size of the tubular portion 220 is subject to a construction error. It is possible to easily absorb a construction error in the horizontal direction of the foundation 1 only by forming it into a size capable of absorbing.

  Further, for example, when a force to pull out the bundle 21 from the foundation 1 is applied to the bundle 21, the mortar M filled between the cotter overhanging portion 122a of the shear cotter 120 and the tube overhanging portion 222b of the tubular portion 220 is added to the mortar M. Has a compressive force. That is, the mortar M filled between the cotter overhang 122a and the tube overhang 222b resists the force of pulling out the bundle 21 from the foundation 1. As described above, the steel-frame foundation beam structure can further prevent the bundle 21 from being pulled out by including the cotter overhanging portion 122a and the tubular overhanging portion 222b.

  A column 22 and a beam 23 are connected to the bundle 21. Therefore, the bundle 21 to which the pillar 22 and the beam 23 are connected needs to be accurately installed at a predetermined position. In the steel-frame foundation beam structure of the present embodiment, even if the foundation 1 has a construction error in the horizontal direction, the bundle 21 to which the column 22 and the beam 23 are coupled can easily absorb the construction error of the foundation 1. It can be joined at a predetermined position on the foundation 1.

  The bundle 21 and the foundation 1 are joined without using anchor bolts. In this way, the bundle 21 can be easily joined to the foundation 1 by only filling the mortar M into the tubular portion 220 without performing the work of attaching the nut to the anchor bolt.

  The component (shear cotter 120) for connecting the bundle 21 and the steel member 12 is not exposed to the outside of the bundle 21. Therefore, when other components are installed around the bundle 21, the other components arranged around the bundle 21 interfere with the components for connecting the bundle 21 and the steel member 12. There is nothing.

(Second embodiment)
A building according to the second embodiment to which the steel-frame foundation beam structure of the present invention is applied will be described. The building of the second embodiment is particularly different from the building of the first embodiment in that the bundle and the steel members are connected together by using anchor bolts in addition to the mortar. Hereinafter, differences from the building X1 of the first embodiment will be mainly described. The same components as those of the building X1 of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

  The building X2 shown in FIG. 5 is a steel-framed house including a foundation 1A and an upper structure 2A built on the foundation 1A. The foundation 1A has a concrete portion 11, a steel member 12A, and anchor bolts 13. The upper structure 2A is composed of a plurality of bundles 21A, a plurality of pillars 22, a plurality of beams 23, and the like. The bundle 21A of the upper structure 2A is joined to the steel member 12A of the foundation 1A. The bundle 21A is also connected to the steel member 12A by the anchor bolt 13.

  Next, details of each part around the joint between the foundation 1A and the upper structure 2A will be described. As shown in FIGS. 6A and 6B, the steel member 12A has a buried portion 110A and a sheer cotter 120A. The embedded portion 110A has a top plate portion 111, a bottom plate portion 112, a plurality of columns 113, and a plurality of bolt fixing portions 115. The bolt fixing portion 115 connects the columns 113 adjacent to each other in the horizontal direction.

  The sheacotter 120A is fixed to the upper surface of the top plate portion 111. The sheacotter 120A projects from the upper surface of the concrete portion 11 (see FIG. 5). The shear cotter 120A is a member that projects upward from the upper surface of the top plate portion 111. In the present embodiment, the cross-sectional shape of the shear cotter 120A in the horizontal direction is a cross shape. The shape of the shear cotter 120A may be a shape other than a cross shape in cross section.

  The lower end of the anchor bolt 13 is connected to the bolt fixing portion 115 of the steel member 12A by a nut. The upper end of the anchor bolt 13 projects upward from the upper surface of the top plate portion 111 through a bolt hole provided in the top plate portion 111. That is, the lower end of the anchor bolt 13 is embedded in the concrete portion 11, and the upper end of the anchor bolt 13 extends to a position above the concrete portion 11.

  As shown in FIGS. 7A and 7B, the bundle 21A has a connecting portion 210 and a tubular portion 220A. The cylinder portion 220A has a cylinder body portion 221A, a cylinder side plate portion 222A, and four leg portions 223. The leg 223 has a substantially L-shaped cross section. The four legs 223 are arranged at the positions of the four corners of the connecting portion 210, respectively. The upper ends of the legs 223 are fixed to the corners of the connecting portion 210, respectively.

  The cylinder side plate portion 222A is fixed to the lower end of the leg portion 223. The cylindrical side plate portion 222A is provided with a square insertion hole 222a. The cylinder side plate portion 222A is provided with a bolt hole 222c through which the upper end of the anchor bolt 13 passes when the bundle 21A is placed on the steel member 12A.

  Here, in the present embodiment, the bundle 21A and the steel member 12A are joined together by using the mortar M as well, which will be described later. Therefore, there is no restriction on the size of the holes that can be provided in the base plate of the bundle, unlike the case where the bundle is fixed to the foundation using only the anchor bolts and nuts. Therefore, the bolt hole 222c can be made larger than the diameter of the anchor bolt 13 plus 5 mm. Therefore, even when the anchor bolt 13 is passed through the bolt hole 222c, the horizontal movement range of the bundle 21A is increased as compared with the case where the bundle is fixed to the foundation using only the anchor bolt and the nut. You can The size of the bolt hole 222c is set to be equal to or larger than the size that allows the bundle 21A to be moved to absorb a construction error of the foundation 1A when the bundle 21A is placed on the steel member 12A.

  The cylinder body 221A is fixed to the upper surface of the cylinder side plate 222A so as to surround the insertion hole 222a. The cylinder body 221A extends from the upper surface of the cylinder side plate 222A to a position near the lower end of the connecting portion 210. The horizontal cross-sectional shape of the cylinder body 221A is a rectangular frame shape. Hereinafter, the space surrounded by the cylinder body 221A is referred to as an internal space R. The insertion hole 222a of the cylinder side plate portion 222A and the internal space R of the cylinder body portion 221A communicate with each other.

  The insertion hole 222a is formed in a size that allows the sheacotter 120A to be inserted therethrough. The cylinder body 221A is formed in a size capable of enclosing the periphery of the sheacotter 120A.

  Next, a configuration for joining the bundle 21A and the foundation 1A will be described. As shown in FIG. 8, the bundle 21A is placed on the top plate portion 111 of the steel member 12A. At this time, the bundle 21A is placed on the top plate portion 111 so that the periphery of the shear cotter 120A is surrounded by the cylinder body portion 221A. The upper end of the anchor bolt 13 is passed through a bolt hole 222c provided in the tubular side plate portion 222A of the tubular portion 220A. With the bundle 21A placed on the top plate 111, the mortar M is filled in the cylinder body 221A. The bundle 21A and the steel member 12A are joined to each other by a mortar M filled in the cylinder body 221A.

  A washer 13b is passed through the upper end of the anchor bolt 13, and two nuts 13a are attached. The bundle 21A is also connected to the steel member 12A by tightening the nut 13a.

  As a work procedure, for example, an operator places the bundle 21A on the top plate portion 111 so that the bundle 21A is arranged at a predetermined position. The operator can move the bundle 21A in the horizontal direction by the amount of the gap between the cylinder body 221A of the bundle 21A and the inner peripheral surfaces of the insertion holes 222a and the shear cotter 120A of the steel member 12A. After that, the worker inserts the washer 13b into the upper end of the anchor bolt 13 and attaches the nut 13a to the upper end of the anchor bolt 13 to connect the bundle 21A to the steel member 12A. Further, the worker fills the mortar M into the tube main body 221A from the upper portion of the bundle 21A through the hole 210a of the connecting portion 210 to join the bundle 21A and the steel member 12A.

  The present embodiment is configured as described above, and in this steel-frame foundation beam structure, the bundles are bundled by the gap between the inner peripheral surfaces of the tube body portion 221A and the insertion holes 222a of the bundle 21A and the shear cotter 120A of the steel member 12A. 21A can be moved in the horizontal direction to adjust the arrangement position. For this reason, the sizes of the cylinder body 221 and the insertion hole 222a are set to a size that can absorb a horizontal installation error of the base 1A (positional displacement of the shear cotter 120A) and the first embodiment. Similarly, the bundle 21A can be installed at a predetermined position while absorbing a construction error. As described above, since there is no restriction (a restriction on the size of the hole of the base plate through which the anchor bolt passes) unlike the case where the bundle is fixed to the foundation using only the anchor bolt and the nut, the cylinder main body portion 221A and the insertion hole 222a are The construction error in the horizontal direction of the foundation 1A can be easily absorbed only by forming the size so that the construction error can be absorbed.

  Further, since the bundle 21A is connected to the steel member 12A also by the anchor bolt 13, the bundle 21A and the steel member 12A can be joined more firmly. In this case, for example, the anchor bolt 13 can resist the force in the bending direction of the bundle 21A. Further, the joint portion in which the cylinder body portion 221A and the sheacotter 120A are joined by the mortar M can resist the shearing force of the bundle 21A.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, as a modified example of the steel foundation beam structure according to the first embodiment, the shear cotter 120 described in the first embodiment may be provided on the bundle side and the tubular portion 220 may be provided on the steel member side. Specifically, the steel member includes an embedded portion 110 and a tubular portion 220 extending downward from the upper surface of the embedded portion 110. The tubular portion 220 has a tubular body portion 221 and a tubular side plate portion 222 fixed to the upper end of the tubular body portion 221. The bundle has a sheer cotter 120 protruding downward from the connecting portion 210. The sheer cotter 120 has a cotter body 121 and a cotter side plate 122 fixed to the lower end of the cotter body 121. The bundle is placed on the constituent members such that the shear cotter 120 is inserted into the tubular portion 220 of the steel member. The constituent member and the bundle are joined to each other by the mortar M filled in the tubular portion 220. As a result, also in the modified example of the first embodiment, it is possible to achieve the same effect as that of the first embodiment. Further, as a modified example of the steel foundation beam structure according to the second embodiment, as in the modified example of the first embodiment described above, the sheer cotter 120A described in the second embodiment is provided on the bundle side, and the cylinder body 221A is provided. May be provided on the steel member side. Then, the bundle and the steel member may be joined using the mortar M and the anchor bolt 13. Thereby, also in the modified example of the second embodiment, the same operational effect as that of the second embodiment can be obtained.

  Also in the first embodiment and the modification of the first embodiment, the bundle 21 and the steel member 12 may be joined together by using the anchor bolts 13 as well, similarly to the second embodiment. In the second embodiment and the modification of the second embodiment, the bundle 21A and the steel member 12A may be joined only by the mortar M without using the anchor bolt 13.

  Instead of the bundles 21 and 21A described in the above-described embodiments and modified examples, columns (coupling members) may be joined to the steel members 12 and 12A. Specifically, in this pillar, the above-mentioned tubular portions 220 and 220A may be fixed to the lower end of the pillar main body portion.

  1, 1A ... Foundation, 11 ... Concrete part, 12, 12A ... Steel member, 13 ... Anchor bolt, 13a ... Nut, 21,21A ... Bundle (connecting member), 110, 110A ... Buried part, 120, 120A ... Sheacotter , 121 ... cotter main body part, 122 ... cotter side plate part, 122a ... cotter overhanging part, 220, 220A ... cylinder part, 221, 221A ... cylinder body part, 222, 222A ... cylinder side plate part, 222b ... cylinder overhang part, M ... Mortar, X1, X2 ... Building.

Claims (7)

A steel foundation beam structure in which a connecting member is joined on a foundation other than a pile foundation ,
The basis is
Concrete part,
An embedded part embedded in the concrete part, and a steel member having a sheer cotter fixed to the embedded part and protruding from the upper surface of the concrete part,
Equipped with
The shear cotter is formed to have a smaller diameter than the embedded portion,
The connecting member has a tubular portion that surrounds the periphery of the sheer cotter, and is installed on the foundation so that the sheer cotter is surrounded by the tubular portion,
The steel-framed beam structure, wherein the steel member and the connecting member are joined to each other by mortar filled in the tubular portion. The sheacotter is
A cotter body portion that projects upward from the embedded portion,
A cotter side plate portion that is provided at the upper end of the cotter body portion and has a cotter overhang portion that extends outward from the outer surface of the cotter body portion,
Equipped with
The tubular portion is
A cylinder main body that surrounds the periphery of the sheacotter,
A cylinder side plate portion that is provided at the lower end of the cylinder body portion and has a cylinder overhanging portion that projects from the inner peripheral surface of the cylinder body portion toward the inside of the cylinder body portion,
The steel foundation beam structure according to claim 1, further comprising: A steel foundation beam structure in which a connecting member is joined on a foundation other than a pile foundation ,
The basis is
Concrete part,
While being embedded in the concrete portion so that the upper surface is exposed, a steel member having a tubular portion extending downward from the upper surface,
Equipped with
The connecting member has a sheer cotter projecting downward, and the sheer cotter is placed on the foundation so as to be inserted into the tubular portion,
The steel-framed beam structure, wherein the steel member and the connecting member are joined to each other by mortar filled in the tubular portion. The tubular portion is
A cylinder main body that surrounds the periphery of the sheacotter,
A cylinder side plate portion that is provided at the upper end of the cylinder body portion and has a cylinder overhanging portion that projects from the inner peripheral surface of the cylinder body portion toward the inside of the cylinder body portion,
Equipped with
The sheacotter is
A cotter body that projects downward,
A cotter side plate portion that is provided at the lower end of the cotter body portion and has a cotter overhang portion that extends outward from the outer surface of the cotter body portion,
The steel foundation beam structure according to claim 3, further comprising: The foundation further comprises an anchor bolt having a lower end embedded in the concrete portion and an upper end protruding from an upper surface of the steel member,
The steel frame foundation beam structure according to any one of claims 1 to 4, wherein the connecting member is further joined to the steel member by the anchor bolt and a nut attached to the anchor bolt.   The steel foundation beam structure according to any one of claims 1 to 5, wherein the connecting member is a pillar or a bundle. The connecting member is a bundle,
The steel-frame foundation beam structure according to any one of claims 1 to 5, further comprising a column and a beam connected to the bundle.

Images