Gate frame

Abstract

In a portal frame in which beam members are connected in a divisible manner, the beam members are connected in a divisible manner without any members protruding from the upper surface of the beam members. [Solution] The portal frame consists of a pair of column members and beam members that are stretched across the pair of column members and formed using H-shaped steel. The beam members are divisible in the central part in the longitudinal direction of the beam members, and the web of the first beam section that constitutes one of the beam members and the web of the second beam section that constitutes the other of the beam members are detachably joined together.

Description

Technical Field

[0001] The present disclosure relates to a portal frame.

Background Art

[0002] The cable fixing pipe rack described in Patent Document 1 employs a sufficiently rigid support body that uses a starting bar to connect a concrete base and a composite column at the base, a steel base plate with a hole opening of the same size as the hollow column so that the starting bar and concrete injection can pass through, a hollow steel cross-section column filled with concrete, such as circular, square, and rectangular, to create a composite column after alignment and fixation are confirmed, and a cut I-beam with a length from a minimum of 600 mm to a maximum of 1000 mm that is sufficiently welded to the column ring reinforcement to create a truly complete end moment connection of the main cross beam at the column joint.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] There is a portal-shaped portal frame composed of a pair of column members and a beam member made of an H-shaped steel spanning the pair of column members. In such a portal frame, for example, the beam member is divided at the central part and transported as two column-beam frames, and the webs and upper and lower flanges of the divided beam members are joined using a splice plate and bolts, etc. at the site to form the portal frame.

[0005] In this configuration, bolts protrude from the top surface of the flange (the top surface of the beam member), raising concerns about potential operational problems. For example, when using a gantry frame as a component of a pipe rack, the protruding bolts would get in the way, requiring pipes and other equipment piping to be placed on the beam member in a position that avoids them.

[0006] The problem addressed by this disclosure is to enable the division of a beam member in a portal frame having a beam member that is divisible, without the member protruding from the upper surface of the beam member. [Means for solving the problem]

[0007] The gate-shaped frame according to the first embodiment is a gate-shaped frame comprising a pair of column members and a beam member that spans the pair of column members and is formed using H-shaped steel, wherein the beam member is divisible in the central part in the longitudinal direction of the beam member, and the web of the first beam portion constituting one of the beam members and the web of the second beam portion constituting the other of the beam member are detachably joined.

[0008] According to the above embodiment, the beam member is divisibly connected at the central part in the longitudinal direction of the beam member, with the web of the first beam section and the web of the second beam section being divisibly connected. This makes it possible to divisibly connect the beam members in a portal frame in which the beam members are divisibly connected without the members protruding from the upper surface of the beam members.

[0009] The portal frame according to the second embodiment is characterized in that, in the portal frame according to the first embodiment, the web of the first beam and the web of the second beam are joined by a pin connection.

[0010] According to the above embodiment, by joining the web of the first beam section and the web of the second beam section with a pin connection, the beam member can be divided without the member protruding from the upper surface of the beam member.

[0011] The portal frame according to the third embodiment is characterized in that, in the portal frame according to the second embodiment, the web of the first beam and the web of the second beam are bolted together using a splice plate that is positioned across the web of the first beam and the web of the second beam.

[0012] According to the above embodiment, the web of the first beam and the web of the second beam are bolted together using a splice plate. This allows the relative position of the first beam and the second beam to be adjusted by loosening the bolts.

[0013] The portal frame according to the fourth embodiment is characterized in that, in the portal frame described in the first embodiment, the first beam section and the second beam section have the same shape.

[0014] According to the above embodiment, the first beam section and the second beam section have the same shape. In other words, the column-beam frame having the first beam section and the column-beam frame having the second beam section have the same shape. This allows for the common use of parts. [Effects of the Invention]

[0015] According to this disclosure, in a portal frame in which beam members are connected in a divisible manner, the beam members can be connected in a divisible manner without the members protruding from the upper surface of the beam members. [Brief explanation of the drawing]

[0016] [Figure 1] This is a perspective view showing a pipe rack equipped with a gate-type frame according to an embodiment of the present disclosure. [Figure 2] This is a perspective view showing a gate-type frame according to an embodiment of the present disclosure. [Figure 3] This is an exploded perspective view showing the connecting portion of the beam member in a portal frame according to an embodiment of the present disclosure. [Figure 4] This is a perspective view showing the connecting portion of a beam member in a portal frame according to an embodiment of the present disclosure. [Figure 5](A)(B)(C)This is an explanatory diagram showing the bending moment when a load is applied in a portal frame according to an embodiment of the present disclosure.

Embodiments for Carrying Out the Invention

[0017] An example of a portal frame according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 5. The arrow H shown in each figure indicates the vertical direction in the portal frame, which is the vertical direction. Further, the arrow W shown in each figure indicates the width direction of the portal frame, which is orthogonal to the arrow H and indicates the horizontal direction. Furthermore, the arrow D shown in each figure indicates the depth direction of the portal frame, which is orthogonal to the arrows H and W and indicates the horizontal direction. First, the pipe rack 100 formed using the portal frame 10 will be described.

[0018] The pipe rack 100 is installed outdoors in a factory and is a member that supports pipes P and the like, as shown in FIG. 1, and is a so-called pipe stand in a factory. The pipe rack 100 includes a plurality of portal frames 10 arranged at intervals in the depth direction and a plurality of connecting frames 120 that connect adjacent portal frames 10.

[0019] (Portal Frame 10) As shown in FIG. 1, the portal frame 10 includes a pair of column members 二十 that are separated in the width direction, a beam member 30 that extends in the width direction and is spanned over the pair of column members 二十, and tension rods 40 and 42 that extend in a direction inclined with respect to the width direction and are spanned over the pair of column members 二十.

[0020] 〔Column Member 20〕 As shown in FIG. 1, the column member 二十 is formed using H-shaped steel and is provided in a pair separated in the width direction as described above. The column member 二十 includes a base plate 22 provided at the lower end of the column member 二十. This base plate 22 is placed on the upper surface 130a of a concrete pedestal portion 130 formed on the ground G.

[0021] It should be noted that in the above translation, "二十" in "a pair of column members 二十" is likely a placeholder or an unclear symbol in the original text. If there is a specific correct value, it should be filled in for a more accurate translation.In addition, an anchor bolt 132 protrudes from the upper surface 130a of the pedestal portion 130, and this anchor bolt 132 is inserted into a through hole (not shown) formed in the base plate 22. Then, by tightening a nut 134 onto the anchor bolt 132, the base plate 22 is attached to the pedestal portion 130. In other words, by tightening the nut 134 onto the anchor bolt 132, the column member 20 is attached to the pedestal portion 130.

[0022] 〔Beam member 30〕 The beam member 30 is formed using H-shaped steel. As shown in FIGS. 1 and 2, four beam members 30 are provided at intervals in the vertical direction, and both ends of the beam member 30 are attached to the column members 20. Specifically, the uppermost beam member 30 is spanned over the upper ends of a pair of column members 20. Also, the interval between the uppermost beam member 30 and the second beam member 30 from the top, and the interval between the second beam member 30 from the top and the third beam member 30 from the top are the same. Furthermore, the interval between the third beam member 30 from the top and the fourth beam member 30 from the top is made wider compared to the other intervals.

[0023] Furthermore, the beam member 30 is configured to be divisible in the longitudinal direction. The configuration that allows the beam member 30 to be divisible will be described in detail later.

[0024] 〔Tension rods 40, 42〕 As shown in FIGS. 1 and 2, a pair of tension rods 40 are provided between the third beam member 30 from the top and the fourth beam member 30 from the top. One of the tension rods 40 is inclined to one side with respect to the width direction. Also, both ends of the tension rod 40 are attached to the column member 20 via brackets 46 provided at the connection portion between the beam member 30 and the column member 20. Furthermore, the other tension rod 42 is inclined to the other side with respect to the width direction. Also, both ends of the tension rod 42 are attached to the column member 20 via brackets 46 provided at the connection portion between the beam member 30 and the column member 20. And the tension rod 40 is configured to be detachable from the bracket 46.

[0025] Furthermore, a pair of tension rods 42 are provided below the fourth beam member 30 from the top. One tension rod 42 is inclined to one side with respect to the width direction. The upper end of the tension rod 42 is attached to the column member 20 via a bracket 46 provided at the connection point between the beam member 30 and the column member 20, and the lower end of the tension rod 42 is attached to the column member 20 via a bracket 48 (see Figure 1) provided at the base of the column member 20. Furthermore, the other tension rod 42 is inclined to the other side with respect to the width direction. The upper end of the tension rod 42 is attached to the column member 20 via a bracket 46 provided at the joint point between the beam member 30 and the column member 20, and the lower end of the tension rod 42 is attached to the column member 20 via a bracket 48 (see Figure 1) provided at the base of the column member 20. The tension rods 42 are detachable from the brackets 46 and 48.

[0026] (Main part configuration) Next, the divisible configuration of the beam member 30 will be described. As shown in Figures 2 to 4, the beam member 30 is divisible in the central part in the width direction. Here, in this application, "divisible" means that the beam member 30 is configured such that one part in the longitudinal direction and the other part in the longitudinal direction can be separated and connected.

[0027] As shown in Figure 3, the beam member 30 comprises a beam section 32 located on one side in the width direction (left side in the figure), a beam section 34 located on the other side in the width direction (right side in the figure), a pair of splice plates 36, a bolt 38a, and a nut 38b. Beam section 32 is an example of a first beam section, and beam section 34 is an example of a second beam section.

[0028] The beam section 32 is formed using H-shaped steel and, as shown in Figures 3 and 4, has a pair of flanges 32a and a web 32b. In addition, a pair of vertically spaced through holes 33 are formed in the other side of the web 32b in the width direction.

[0029] The beam section 34 is formed using H-shaped steel and has a pair of flanges 34a and a web 34b. In addition, a pair of vertically spaced through holes 35 are formed in one side of the web 34b in the width direction.

[0030] A pair of splice plates 36 are provided so as to sandwich the webs 32b and 34b from the depth direction. The splice plates 36 have a through hole 36a that is connected to the through hole 33 and a through hole 36b that is connected to the through hole 35.

[0031] In this configuration, beam section 32 and beam section 34 are butted together. Then, two bolts 38a are inserted into the through hole 36a of one splice plate 36, the through hole 33 of the web 32b, and the through hole 36a of the other splice plate 36. With the bolts 38a in this state, nuts 38b are tightened onto the bolts 38a.

[0032] Similarly, insert the two bolts 38a into the through hole 36b of one splice plate 36, the through hole 35 of the web 34b, and the through hole 36b of the other splice plate 36. With the bolts 38a in this position, tighten the nuts 38b onto the bolts 38a.

[0033] In this way, the beam member 30 is formed from the divided beam section 32 and beam section 34. Specifically, the beam member 30 is formed simply by joining the web 32b of beam section 32 and the web 34b of beam section 34 with a pin connection. In other words, the beam member 30 is divided into beam section 32 and beam section 34 simply by releasing the pin connection between the web 32b of beam section 32 and the web 34b of beam section 34. In this way, the beam member 30 is connected in a way that allows it to be divided without any members protruding from the upper surface of the beam member 30.

[0034] Here, one or more of the through holes 33, 35, 36a, and 36b have an inner diameter larger than the outer diameter of the bolt 38a, and the relative position of the beam 32 and the beam 34 can be adjusted by loosening the bolt 38a.

[0035] (action) Next, the bending moment under long-term load when the beam members 30 of the portal frame 10 support pipes, etc., and the bending moment of the portal frame 10 under seismic load will be explained using Figure 5.

[0036] Figure 5(B) shows the bending moment diagram of the portal frame 10 under long-term load. The dashed line shows the bending moment of the beam member 30, and the dashed line shows the bending moment of the column member 20. Under long-term load, the portal frame 10 experiences a bending moment that is symmetrical with respect to the center in the width direction (the connection point of the beam).

[0037] Figure 5(C) shows the bending moment diagram of the portal frame 10 under seismic load. The dashed line shows the bending moment of the beam member 30, and the dashed line shows the bending moment of the column member 20. Under seismic load, the portal frame 10 experiences a bending moment in which the beam member does not bend at the center in the width direction (the connection point of the beam section). In other words, the portal frame 10 experiences a bending moment similar to that which would occur if the beam member were integrally formed.

[0038] (summary) As described above, in the portal frame 10, the beam member 30 is joined in a divisible manner at the central part of the longitudinal direction of the beam member 30, with the web 32b of the beam section 32 and the web 34b of the beam section 34 being joined. This makes it possible to divide the beam member 30 in a portal frame 10 having a divisible beam member 30 without the member protruding from the upper surface of the beam member 30.

[0039] Furthermore, in the portal frame 10, the web 32b of the beam section 32 and the web 34b of the beam section 34 are joined by pin connections, allowing the beam members 30 to be connected in a divisible manner without any members protruding from the upper surface of the beam members 30.

[0040] Furthermore, in the portal frame 10, the web 32b of beam section 32 and the web 34b of beam section 34 are bolted together using a splice plate 36. This allows the relative position of beam section 32 and beam section 34 to be adjusted by loosening the bolt 38a. In other words, by loosening the bolt 38a, the relative position of one column-beam frame and the other column-beam frame can be adjusted.

[0041] Furthermore, in the portal frame 10, the beam section 32 and the beam section 34 have the same shape. In other words, the column-beam frame having the beam section 32 and the column-beam frame having the beam section 34 have the same shape. This allows for the common use of parts.

[0042] Although this disclosure has been described in detail with respect to specific embodiments, it will be apparent to those skilled in the art that this disclosure is not limited to these embodiments, and that various other embodiments are possible within the scope of this disclosure. For example, in the above embodiment, the portal frame 10 is provided with a plurality of beam members 30, but there may be only one beam member 30.

[0043] Furthermore, although the column member 20 was an H-shaped steel in the above embodiment, it may also be a steel pipe column. [Explanation of Symbols]

[0044] 10 Gantry frame 20 Column members 22 Base Plate 30 Beam members 32. Beam section (an example of the first beam section) 32b Web 34. Beam section (an example of a second beam section) 34b Web 36 Splice Plates 38a Bolt 38b Nut

Claims

1. A gate-shaped gate frame comprising a pair of column members and a beam member that spans the pair of column members and is formed using H-shaped steel, The beam member is divisible in the central part in the longitudinal direction of the beam member, and the web of the first beam portion constituting one of the beam members and the web of the second beam portion constituting the other of the beam member are detachably joined together. Gate-type frame.

2. The web of the first beam section and the web of the second beam section are joined by a pin connection. A portal frame according to claim 1.

3. The web of the first beam and the web of the second beam are bolted together using a splice plate that is positioned across the webs of the first and second beams. The gate-type frame according to claim 2.

4. The first beam section and the second beam section are of the same shape. A portal frame according to claim 1.

Images