Shear lag structure of column and beam and shear lag structure of reactor containment vessel

Abstract

To prevent restriction of thermal deformation in a horizontal longitudinal direction and a vertical direction of a beam, to enable support in a vertical direction on the beam from first and second columns, and to avoid a cantilever shape of a beam having a conventional structure.SOLUTION: A shear lag structure of a column and a beam is composed of first and second columns which are arranged so as to face each other at a predetermined interval and have lower ends fixed to fixed parts, and one beam which extends in a horizontal direction and has one end fixed to the second column and the other end connected to the first column through a shear lag not restricting vertical and horizontal longitudinal directions, and connects the first column and the second column, and transmits a load in a horizontal shorter direction of the beam to the second column from the first column, and includes a bracket for supporting the beam on the first column, wherein a gradient or a step is formed in a contact part of the bracket and the beam.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a column-to-beam shear lug structure and a shear lug structure for a reactor containment vessel, and in particular to a column-to-beam shear lug structure in which a first column and a second column, which are arranged opposite each other with a predetermined distance between them, are connected by a beam having a shear lug at one end that does not restrict the vertical and horizontal longitudinal directions, and to a shear lug structure for a reactor containment vessel in which a reactor containment vessel and a reactor shielding wall are connected by a stabilizer having a shear lug on the reactor containment vessel side that does not restrict the vertical and horizontal longitudinal directions. [Background technology]

[0002] In the case of a structure consisting of two columns and one beam arranged opposite each other, in which the load in the horizontal short direction of the beam is transmitted from one column to the other, by using a shear lug structure for the connection between the beam and one of the columns, it is possible to create a connection method that does not restrict thermal deformation of the beam in the horizontal long direction and vertical direction when the ambient temperature rises.

[0003] For example, there is a shear lug structure for a reactor containment vessel in which the reactor containment vessel and the reactor shielding wall are connected by a stabilizer that has shear lugs on the reactor containment vessel side that do not restrain the vessel in the vertical and horizontal longitudinal directions.

[0004] Patent Document 1 describes a shear lug structure for a reactor containment vessel in which the reactor containment vessel and the reactor shielding wall are connected by a stabilizer (pipe), and the connection with the reactor containment vessel is a shear lug structure, and at this connection the stabilizer is not supported vertically but has a cantilever shape. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 59-44692 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned column-beam shear lag structure, the beams are cantilevered, which poses a problem in terms of structural integrity against vertical loads.The shear lag structure of the above-mentioned reactor containment vessel also poses a similar problem because the stabilizer is not supported vertically but is cantilevered.

[0007] The present invention has been made in consideration of the above points, and its first object is to provide a shear-gap structure of columns and beams that does not restrict thermal deformation of the beam in the horizontal longitudinal direction or vertical direction, and allows vertical support from the first and second columns to the beam, thereby avoiding the cantilever shape of the beam in conventional structures.

[0008] A second object of the present invention is to provide a shear lug structure for a reactor containment vessel that does not restrict thermal deformation of the stabilizer in the horizontal longitudinal direction and the vertical direction, and that enables the stabilizer to be supported in the vertical direction from the reactor containment vessel and the reactor shielding wall, thereby avoiding the cantilever shape of the stabilizer in the conventional structure. [Means for solving the problem]

[0009] In order to achieve the first object, the shear lug structure of the column and beam of the present invention comprises first and second columns arranged opposite each other at a predetermined interval and having their lower ends fixed to a fixing part, and one beam extending horizontally, one end of which is fixed to the second column and the other end of which is connected to the first column via a shear lug that does not restrict the vertical and horizontal longitudinal directions, thereby connecting the first column and the second column, and the load in the horizontal short direction of the beam is Through the shear rag A shear-lag structure of a column and a beam that transmits from the first column to the second column, the shear-lag structure comprising a bracket that supports the beam on the first column, the bracket Top of and the beam With the underside At the contact point, To be opposed gradient Department is formed The gradient of the gradient portion of the contact portion between the bracket and the beam was set to a value close to δv / δh, where the difference in thermal expansion between the first column and the second column in the vertical direction is δv (= L1·α1·ΔT - L2·α2·ΔT) and the thermal expansion of the beam in the longitudinal direction is δh (= L3·α3·ΔT). It is characterized by: (Here, L1 is the distance from the fixed part of the first pillar to the beam, L2 is the distance from the fixed part of the second pillar to the beam, L3 is the distance from the other end of the beam to the second pillar, α1 is the linear expansion coefficient of the material of the first pillar, α2 is the linear expansion coefficient of the material of the second pillar, α3 is the linear expansion coefficient of the material of the beam, and ΔT is the amount of change in ambient temperature.)

[0010] In order to achieve the first object, the shear lug structure of the column and beam of the present invention comprises first and second columns arranged opposite each other at a predetermined interval and having their lower ends fixed to a fixing part, and one beam extending horizontally, one end of which is fixed to the second column and the other end of which is connected to the first column via a shear lug that does not restrict the vertical and horizontal longitudinal directions, thereby connecting the first column and the second column, and the load in the horizontal short direction of the beam is Through the shear rag The shear structure is a column-beam shear structure that transmits power from the first column to the second column, and is characterized in that the first column is provided with a bracket that protrudes horizontally from the first column and supports the beam, and a third column that supports the beam is installed on the bracket, and the third column has a material and length that makes the vertical thermal displacement of one end of the beam equal to that of the other end.

[0012] Furthermore, in order to achieve the second object, the shear lug structure for a reactor containment vessel of the present invention comprises: a cylindrical reactor containment vessel that contains a reactor pressure vessel; a reactor shielding wall that is installed so as to surround the reactor pressure vessel; and a stabilizer that extends horizontally and has one end connected to the reactor shielding wall and the other end connected to the reactor containment vessel via a shear lug that does not restrict the reactor pressure vessel in the vertical and horizontal longitudinal directions, thereby connecting the reactor containment vessel and the reactor shielding wall. The load in the horizontal short direction of the stabilizer is transmitted from the reactor containment vessel to the reactor shielding wall via the shear lug. A shear lug structure for a nuclear reactor containment vessel, comprising: a bracket for supporting the stabilizer on the nuclear reactor containment vessel; Top of and the stabilizer With the underside At the contact point, To be opposed gradient Department is formed The gradient of the gradient portion of the contact portion between the bracket and the stabilizer is set to a value close to δv / δh, where δv (= L1·α1·ΔT - L2·α2·ΔT) is the difference in thermal expansion between the reactor containment vessel and the reactor shielding wall in the vertical direction, and δh (= L3·α3·ΔT) is the thermal expansion of the stabilizer in the longitudinal direction. It is characterized by: (Here, L1 is the distance from the fixed part of the reactor containment vessel to the stabilizer, L2 is the distance from the fixed part of the reactor shielding wall to the stabilizer, L3 is the distance from the other end of the stabilizer to the reactor shielding wall, α1 is the linear expansion coefficient of the reactor containment vessel material, α2 is the linear expansion coefficient of the reactor shielding wall material, α3 is the linear expansion coefficient of the stabilizer material, and ΔT is the amount of change in ambient temperature.)

[0013] In order to achieve the second object, the shear lug structure for a reactor containment vessel of the present invention comprises: a cylindrical reactor containment vessel that contains a reactor pressure vessel; a reactor shielding wall that is installed so as to surround the reactor pressure vessel; and a stabilizer that extends horizontally and has one end connected to the reactor shielding wall and the other end connected to the reactor containment vessel via a shear lug that does not restrict the vertical and horizontal longitudinal directions, thereby connecting the reactor containment vessel and the reactor shielding wall. The load in the horizontal short direction of the stabilizer is transmitted from the reactor containment vessel to the reactor shielding wall via the shear lug. A shear lug structure for a reactor containment vessel, the reactor containment vessel being provided with a bracket that protrudes horizontally from the reactor containment vessel and supports the stabilizer, the bracket having a support member that supports the stabilizer, the support member having a material and length that makes one end and the other end of the stabilizer equivalent in vertical thermal displacement. [Effects of the Invention]

[0015] According to the present invention, it is possible to obtain a shear structure between columns and beams that does not restrain thermal deformation of the beams in the horizontal longitudinal direction and the vertical direction, and allows vertical support from the first and second columns to the beams, thereby avoiding the cantilever shape of the beams in the conventional structure.Furthermore, it is possible to obtain a shear structure for a reactor containment vessel that does not restrain thermal deformation of the stabilizer in the horizontal longitudinal direction and the vertical direction, and allows vertical support from the reactor containment vessel and the reactor shielding wall to the stabilizer, thereby avoiding the cantilever shape of the stabilizer in the conventional structure. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a cross-sectional view showing a first embodiment of a shear lag structure of a column and a beam according to the present invention. [Figure 2] FIG. 2 is a detailed view of part A in FIG. [Figure 3] FIG. 3 is a diagram showing a modification of FIG. 2. [Figure 4] FIG. 4 is a diagram showing a modification of FIG. 3. [Figure 5] FIG. 10 is a cross-sectional view showing a second embodiment of the column-beam shear lag structure of the present invention. [Figure 6(a)]FIG. 10 is a cross-sectional view showing a third embodiment of the column-beam shear lag structure of the present invention. [Figure 6(b)] FIG. 6(b) is a cross-sectional view taken along line AA in FIG. 6(a). [Figure 7] 1 is a vertical cross-sectional view of a reactor containment facility to which the shear lag structure of a reactor containment vessel of the present invention is applied. [Figure 8] FIG. 10 is a conceptual diagram showing a shear lag structure of a reactor containment vessel according to a fourth embodiment of the present invention. [Figure 9] FIG. 10 is a conceptual diagram showing a shear lag structure of a reactor containment vessel according to a fifth embodiment of the present invention. [Figure 10] FIG. 10 is a conceptual diagram showing a shear lag structure of a reactor containment vessel according to a sixth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The shear structure of a column and beam and the shear structure of a nuclear reactor containment vessel of the present invention will be described below based on the illustrated embodiments. Note that the same reference numerals are used for the same components in each drawing. [Example]

[0018] FIG. 1 shows a first embodiment of a column-beam shear lag structure of the present invention, and FIG. 2 shows the details of part A in FIG.

[0019] As shown in Figure 1, the shear lug structure of the pillars and beams in this embodiment is roughly composed of a first pillar 1 and a second pillar 2, which are arranged opposite each other with a predetermined distance between them and whose lower ends are fixed to a fixed part (ground 6), and one beam 3, which extends horizontally and has one end 3a connected to the second pillar 2 and the other end 3b fixed to the first pillar 1 via a shear lug 4 that does not restrict the vertical direction or the horizontal longitudinal direction, thereby connecting the first pillar 1 and the second pillar 2, and transmits the load in the horizontal short direction of the beam 3 (the direction perpendicular to the paper surface of Figure 1) from the first pillar 1 to the second pillar 2.

[0020] In this embodiment, the first column 1 is provided with a bracket 5 that supports the beam 3, and at the contact point between this bracket 5 and the beam 3, as shown in Figure 2, the sloped portion 3c of the beam 3 formed on the underside of the other end 3b of the beam 3 and the sloped portion 5a of the bracket 5 formed on the upper surface of the bracket 5 are arranged to face each other, and the sloped portion 3c of the beam 3 and the sloped portion 5a of the bracket 5 are characterized by being sloped portions that correspond to the difference in thermal expansion in the vertical direction between the first column 1 and the second column 2 and the amount of thermal expansion in the horizontal longitudinal direction of the beam 3.

[0021] Specifically, if the difference in thermal expansion between the first column 1 and the second column 2 in the vertical direction is δv (= L1·α1·ΔT - L2·α2·ΔT), and the amount of thermal expansion in the longitudinal direction of the beam 3 is δh (= L3·α3·ΔT), the gradient of the contact point between the bracket 5 and the beam 3 is set to a value close to δv / δh. Here, L1 is the distance from the fixed part of the first column 1 (ground 6) to the beam 3, L2 is the distance from the fixed part of the second column 2 (ground 6) to the beam 3, L3 is the distance from the other end 3b of the beam 3 to the second column 2, α1 is the linear expansion coefficient of the material of the first column 1, α2 is the linear expansion coefficient of the material of the second column 2, α3 is the linear expansion coefficient of the material of the beam 3, and ΔT is the amount of change in ambient temperature.

[0022] The support portion of the beam 3 by the bracket 5 may have a step formed on the outer peripheral surface of the bracket 5 consisting of a sloped portion 5a' and a horizontal portion 5b, as shown in Fig. 3, or may have a roller structure 7 at the contact portion between the bracket 5 and the beam 3, as shown in Fig. 4 (Fig. 4 shows a roller structure 7 at the contact portion between the bracket 5 and the beam 3 in the structure of Fig. 3, but the roller structure 7 may also be provided at the contact portion between the bracket 5 and the beam 3 in the structure of Fig. 2). Furthermore, it is more effective to apply a lubricating metal (solid lubrication treatment, etc.) to the contact portion between the beam 3 and the bracket 5.

[0023] By adopting the configuration of this embodiment, the thermal deformation of the beam 3 in the longitudinal and vertical directions is not restrained, and by supporting the beam 3 with a bracket 5 having a sloped portion 5a formed thereon or a bracket 5 having a step formed thereon consisting of a sloped portion 5a' and a horizontal portion 5b, it becomes possible for both the first column 1 and the second column 2 to support the beam 3 in the vertical direction, thereby avoiding the cantilever shape of the beam 3 in the conventional structure and improving the structural integrity against vertical loads. [Example]

[0024] FIG. 5 shows a second embodiment of the post-and-beam shear lag structure of the present invention.

[0025] The shear lug structure of the pillars and beams of this embodiment shown in Figure 5 is similar to the structure of Example 1 shown in Figure 1, but in this embodiment, a bracket 5 is provided below the vertical middle of the first pillar 1, protruding horizontally from this first pillar 1 to support the beam 3, and this bracket 5 is equipped with a third pillar 8 that supports the beam 3, and this third pillar 8 is characterized by having a material and length that make the vertical thermal displacement of one end 3a and the other end 3b of the beam 3 equivalent.

[0026] Specifically, when the distance from the fixed part (ground surface 6) of the second column 2 to the beam 3 is L2, the distance from the bracket 5 of the third column 8 to the beam 3 is L4, and the distance from the fixed part (ground surface 6) of the first column 1 to the top surface of the bracket 5 is L5, the material and length of the columns are set so that the following relation holds: L2·α2·ΔT ≒ L4·α4·ΔT + L5·α1·ΔT. Here, α1 is the linear expansion coefficient of the material of the first column 1, α2 is the linear expansion coefficient of the material of the second column 2, α4 is the linear expansion coefficient of the material of the third column 8, and ΔT is the amount of change in ambient temperature.

[0027] For example, if the material of the first column 1 is carbon steel, the material of the second column 2 is austenitic stainless steel, and the material of the third column 8 is aluminum, and the distance L2 from the fixed part of the second column 2 (ground 6) to the beam 3 is 1000 mm, the distance L4 from the bracket 5 of the third column 8 to the beam 3 is approximately 350 mm, and the distance L5 from the fixed part of the first column 1 (ground 6) to the top surface of the bracket 5 is approximately 650 mm, then the relationship L2·α2·ΔT ≒ L4·α4·ΔT + L5·α1·ΔT holds true.

[0028] By adopting the configuration of this embodiment, the longitudinal and vertical thermal deformation of the beam 3 is not restricted, and the beam 3 is supported by the bracket 5 via the third column 8, which has a material and length that makes the vertical thermal displacement of one end 3a and the other end 3b of the beam 3 equivalent. This makes it possible for both the first column 1 and the second column 2 to support the beam 3 in the vertical direction, thereby avoiding the cantilever shape of the beam 3 in the conventional structure and improving the structural integrity against vertical loads. [Example]

[0029] 6(a) and 6(b) show a third embodiment of the post-and-beam shear lag structure of the present invention.

[0030] The shear lug structure of the pillar and beam of this embodiment shown in Figures 6(a) and 6(b) is partially similar to the structure of Example 1 shown in Figure 1, but in this embodiment, one end 3a of the beam 3 and the second pillar 2, and the other end 3b of the beam 3 and the first pillar 1 are pin-connected using pins 10a and 10b, respectively, and a long hole 11 with a long diameter in the longitudinal direction of the beam 3 is formed at the pin connection between the other end 3b of the beam 3 and the first pillar 1, and the other end 3b of the beam 3 and the first pillar 1 are pin-connected via this long hole 11.

[0031] Specifically, U-shaped cross-section fixing brackets 9a and 9b are fixed to the upper ends of the first column 1 and the second column 2, respectively, and one end 3a and the other end 3b of the beam 3 are connected to these U-shaped cross-section fixing brackets 9a and 9b using pins 10a and 10b. Reference numeral 9c denotes a backing member arranged between the beam 3 and the fixing brackets 9a and 9b.

[0032] The major diameter of the above-mentioned slot 11 exceeds the square root of the sum of the squares of the difference in thermal expansion between the first column 1 and the second column 2 in the vertical direction and the thermal expansion of the beam 3 in the longitudinal direction.

[0033] By adopting the configuration of this embodiment, the thermal deformation of the beam 3 in the longitudinal and vertical directions is not restrained, and one end 3a of the beam 3 is connected to the second column 2 and the other end 3b of the beam 3 is connected to the first column 1 in the vertical direction using pins 10a and 10b, respectively. This makes it possible for both the first column 1 and the second column 2 to support the beam 3 in the vertical direction, thereby avoiding the cantilever shape of the beam 3 in the conventional structure and improving the structural integrity against vertical loads. [Example]

[0034] FIG. 7 shows a vertical cross-sectional view of a reactor containment facility to which a shear lag structure for a reactor containment vessel according to a fourth embodiment of the present invention is applied.

[0035] As shown in Figure 7, the reactor containment facility is roughly configured to include a reactor containment vessel 16 that contains a reactor pressure vessel 15, a reactor shielding wall 13 that is installed to surround the reactor pressure vessel 15, and a stabilizer 14 that extends horizontally, one end of which is fixed to the reactor shielding wall 13 and the other end of which is connected to the reactor containment vessel 16 via a shear lug 4A (see Figure 8) that does not restrict the reactor pressure vessel 15 in the vertical and radial directions, and that connects the reactor containment vessel 16 and the reactor shielding wall 13. The reactor pressure vessel 15 is installed at the upper end of a cylindrical pedestal that is installed inside the reactor containment vessel 16, and the cylindrical reactor shielding wall 13 surrounds the reactor pressure vessel 15 and is installed at the upper end of the pedestal.

[0036] Fig. 8 shows a detailed structure of part B in Fig. 7. Fig. 8 is a cross-sectional view showing a shear lag structure of a reactor containment vessel according to a fourth embodiment of the present invention.

[0037] As shown in FIG. 8, the shear lug structure of the reactor containment vessel of this embodiment is characterized in that it includes a bracket 5A that supports a stabilizer 14 on the reactor containment vessel 16, and a slope or step is formed at the contact portion between the bracket 5A and the stabilizer 14.

[0038] The gradient or step formed at the contact portion between the bracket 5A and the stabilizer 14 in this embodiment has a similar structure to that shown in Figures 2, 3, and 4 described in Example 1, including the application of a lubricating metal (solid lubrication treatment, etc.) to the contact portion.

[0039] With this configuration of the present embodiment, thermal deformation of the stabilizer 14 in the longitudinal and vertical directions is not restrained, and the stabilizer 14 is supported by brackets 5A having a sloped portion or brackets 5A having a step consisting of a sloped portion and a horizontal portion, so that the stabilizer 14 can be supported in the vertical direction by the columns of both the reactor containment vessel 16 and the reactor shielding wall 13. This makes it possible to avoid the cantilever shape of the stabilizer 14 of the conventional structure, and improves the structural integrity against vertical loads. [Example]

[0040] FIG. 9 shows a shear lag structure of a reactor containment vessel according to a fifth embodiment of the present invention.

[0041] The shear lug structure of the reactor containment vessel of this embodiment shown in FIG. 9 is similar to the structure of Example 4 shown in FIG. 8, but in this embodiment, the reactor containment vessel 16 is provided with a bracket 5A that protrudes horizontally from the reactor containment vessel 16 and supports the stabilizer 14, and a support member 8A that supports the stabilizer 14 is installed on this bracket 5A, and this support member 8A is characterized by having a material and length that make the thermal displacements of one end 14a and the other end 14b of the stabilizer 14 equivalent in the vertical direction.

[0042] With the configuration of this embodiment, the thermal deformation of the stabilizer 14 in the longitudinal and vertical directions is not restricted, and the stabilizer 14 is supported by the bracket 5A via the support member 8A, which is made of a material and has a length such that the thermal deformation in the vertical direction of one end 14a and the other end 14b of the stabilizer 14 is equivalent. This makes it possible to support the stabilizer 14 in the vertical direction from both the reactor containment vessel 16 and the reactor shielding wall 13, thereby avoiding the cantilever shape of the stabilizer 14 in the conventional structure and improving the structural integrity against vertical loads. [Example]

[0043] FIG. 10 shows a shear lag structure of a reactor containment vessel according to a sixth embodiment of the present invention.

[0044] The shear lug structure of the reactor containment vessel of this embodiment shown in FIG. 10 is partially similar to the structure of Embodiment 4 shown in FIG. 8 , but in this embodiment, one end 14a of the stabilizer 14 is pin-connected to the reactor shielding wall 13 using pins 10a1 and the other end 14b of the stabilizer 14 is pin-connected to the reactor containment vessel 16 using pins 10a1 and 10b1, respectively, and a long hole 11A having a major diameter in the longitudinal direction of the stabilizer 14 is formed at the pin-connected portion between the other end 14b of the stabilizer 14 and the reactor containment vessel 16, and the other end 14b of the stabilizer 14 is pin-connected to the reactor containment vessel 16 via this long hole 11A.

[0045] Specifically, U-shaped cross-section fixing brackets 9a1 and 9b1 are fixed to the upper ends of the reactor containment vessel 16 and the reactor shielding wall 13, respectively, and one end 14a and the other end 14b of the stabilizer 14 are pin-connected to these U-shaped cross-section fixing brackets 9a1 and 9b1 using pins 10a1 and 10b1.

[0046] The major axis of the slot 11A is larger than the square root of the sum of the squares of the difference in thermal expansion between the reactor containment vessel 16 and the reactor shielding wall 13 in the vertical direction and the thermal expansion of the stabilizer 14 in the longitudinal direction.

[0047] With the configuration of this embodiment, thermal deformation of the stabilizer 14 in the longitudinal and vertical directions is not restricted, and one end 14a of the stabilizer 14 is connected to the reactor shielding wall 13 and the other end 14b of the stabilizer 14 is connected to the reactor containment vessel 16 using pins 10a1 and 10b1, respectively. This enables the stabilizer 14 to be supported in the vertical direction by both the reactor containment vessel 16 and the reactor shielding wall 13, making it possible to avoid the cantilever shape of the stabilizer 14 of the conventional structure, and improving the structural integrity against vertical loads.

[0048] The present invention is not limited to the above-described embodiments and includes various modifications. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of each embodiment with other configurations. [Explanation of symbols]

[0049] 1...first column, 2...second column, 3...beam, 3a...one end of beam, 3b...other end of beam, 3c...sloped portion of beam, 4, 4A...shear lug, 5, 5A...bracket, 5a, 5a'...sloped portion of bracket, 5b...horizontal portion of bracket, 6...ground, 7...roller structure, 8...third column, 8A...support member, 9a, 9a1, 9b, 9b1...fixing bracket, 9c...backing member, 10a, 10a1, 10b, 10b1...pin, 11, 11A...long hole, 13...reactor shielding wall, 14...stabilizer, 14a...one end of stabilizer, 14b...other end of stabilizer, 15...reactor pressure vessel, 16...reactor containment vessel.

Claims

1. The structure comprises first and second columns arranged opposite each other at a predetermined interval and having their lower ends fixed to a fixed portion, and a beam extending horizontally, one end of which is fixed to the second column and the other end of which is connected to the first column via a shear lug that is not constrained in the vertical and horizontal longitudinal directions, thereby connecting the first column and the second column; A column-to-beam shear lug structure that transmits a load in the horizontal short direction of the beam from the first column to the second column via the shear lug, a bracket for supporting the beam on the first column, and a sloped portion formed at a contact portion between an upper surface of the bracket and a lower surface of the beam so as to face each other; The gradient of the gradient portion of the contact portion between the bracket and the beam is set to a value close to δv / δh, where δv (= L1 α1 ΔT - L2 α2 ΔT) is the difference in vertical thermal expansion between the first column and the second column, and δh (= L3 α3 ΔT) is the thermal expansion amount of the beam in the longitudinal direction. A shear structure of a column and a beam. (Here, L1 is the distance from the fixed part of the first pillar to the beam, L2 is the distance from the fixed part of the second pillar to the beam, L3 is the distance from the other end of the beam to the second pillar, α1 is the linear expansion coefficient of the material of the first pillar, α2 is the linear expansion coefficient of the material of the second pillar, α3 is the linear expansion coefficient of the material of the beam, and ΔT is the amount of change in ambient temperature.)

2. 2. The post and beam shear lag structure of claim 1, A column-to-beam shear lug structure characterized in that the contact portion between the bracket and the beam is subjected to a lubricating treatment.

3. 2. The post and beam shear lag structure of claim 1, A column-to-beam shear lug structure, characterized in that a roller structure is provided at the contact portion between the bracket and the beam.

4. The structure comprises first and second columns arranged opposite each other at a predetermined interval and having their lower ends fixed to a fixed portion, and a beam extending horizontally, one end of which is fixed to the second column and the other end of which is connected to the first column via a shear lug that is not constrained in the vertical and horizontal longitudinal directions, thereby connecting the first column and the second column; A column-to-beam shear lug structure that transmits a load in the horizontal short direction of the beam from the first column to the second column via the shear lug, A shear-lag structure of pillars and beams, characterized in that the first pillar is provided with a bracket that protrudes horizontally from the first pillar and supports the beam, a third pillar that supports the beam is installed on the bracket, and the third pillar has a material and length that makes the vertical thermal displacement of one end of the beam equal to that of the other end.

5. 5. The post and beam shear lag structure of claim 4, A column-to-beam shear lag structure characterized in that the materials and lengths of the first, second, and third columns are set so that the relationship L2 α2 ΔT ≒ L4 α4 ​​ΔT + L5 α1 ΔT holds, where L2 is the distance from the fixed portion of the second column to the beam, L4 is the distance from the bracket of the third column to the beam, and L5 is the distance from the fixed portion of the first column to the upper surface of the bracket. (Here, α1 is the linear expansion coefficient of the material of the first pillar, α2 is the linear expansion coefficient of the material of the second pillar, α4 is the linear expansion coefficient of the material of the third pillar, and ΔT is the amount of change in ambient temperature.)

6. a cylindrical reactor containment vessel that contains a reactor pressure vessel; a reactor shielding wall that is installed so as to surround the reactor pressure vessel; and a stabilizer that extends horizontally, one end of which is connected to the reactor shielding wall and the other end of which is connected to the reactor containment vessel via a shear lug that is not constrained in the vertical or horizontal longitudinal directions, thereby connecting the reactor containment vessel and the reactor shielding wall, A shear lug structure for a reactor containment vessel that transmits a load in a horizontal short side direction of the stabilizer from the reactor containment vessel to the reactor shielding wall via the shear lug, a bracket for supporting the stabilizer on the containment vessel, wherein sloped portions are formed at opposing contact portions between an upper surface of the bracket and a lower surface of the stabilizer; A shear lug structure for a reactor containment vessel, characterized in that the gradient of the gradient portion of the contact portion between the bracket and the stabilizer is set to a value close to δv / δh, where δv (= L1 α1 ΔT - L2 α2 ΔT) is the difference in thermal expansion in the vertical direction between the reactor containment vessel and the reactor shielding wall, and δh (= L3 α3 ΔT) is the thermal expansion amount of the stabilizer in the longitudinal direction. (Here, L1 is the distance from the fixed part of the reactor containment vessel to the stabilizer, L2 is the distance from the fixed part of the reactor shielding wall to the stabilizer, L3 is the distance from the other end of the stabilizer to the reactor shielding wall, α1 is the linear expansion coefficient of the material of the reactor containment vessel, α2 is the linear expansion coefficient of the material of the reactor shielding wall, α3 is the linear expansion coefficient of the material of the stabilizer, and ΔT is the amount of change in ambient temperature.)

7. a cylindrical reactor containment vessel that contains a reactor pressure vessel; a reactor shielding wall that is installed so as to surround the reactor pressure vessel; and a stabilizer that extends horizontally, one end of which is connected to the reactor shielding wall and the other end of which is connected to the reactor containment vessel via a shear lug that is not constrained in the vertical or horizontal longitudinal directions, thereby connecting the reactor containment vessel and the reactor shielding wall, A shear lug structure for a reactor containment vessel that transmits a load in a horizontal short side direction of the stabilizer from the reactor containment vessel to the reactor shielding wall via the shear lug, a bracket protruding horizontally from the reactor containment vessel to support the stabilizer, the bracket having a support member for supporting the stabilizer, the support member having a material and a length such that one end and the other end of the stabilizer undergo equivalent thermal displacement in the vertical direction.

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