A support type node plate capable of rotating following the relative rotation deformation of a beam column

Abstract

The application provides a support type joint plate which can rotate along with the relative rotation deformation of a beam column, comprising a column end joint plate, a beam end joint plate and a center plate, the column end joint plate and the beam end joint plate are fixed with a column end and a beam end respectively, the center plate is clamped between the column end joint plate and the beam end joint plate through an arc-shaped pin shaft, the center plate is connected and fixed with an inclined support, when the relative rotation deformation between the column end and the beam end occurs, the column end joint plate and the beam end joint plate are driven to rotate, and the center plate is driven to move forward and backward to drive the inclined support to stretch or compress so as to release the opening and closing effect. When the relative rotation deformation between the column end and the beam end occurs, the column end joint plate and the beam end joint plate are driven to rotate, and the center plate is driven to move forward and backward to drive the inclined support to stretch or compress, the rotation deformation force is finally transmitted to the inclined support, the horizontal load is consumed by the elastic-plastic stretching or compression of the inclined support, and the seismic performance of the frame structure is improved.

Description

Technical Field

[0001] This invention relates to the field of civil engineering frame-support structure technology, and in particular to a support-type node plate that can rotate with the relative rotation and deformation of beams and columns. Background Technology

[0002] Diagonal bracing, such as ordinary diagonal bracing and buckling-restrained diagonal bracing, is widely used as a lateral force resisting member in civil engineering frame structures. Ordinary diagonal bracing can effectively increase the lateral stiffness of the structure and can even dissipate some horizontal external loads such as earthquakes. Under normal service conditions and under horizontal loads such as minor earthquakes, buckling-restrained diagonal bracing plays the supporting role of ordinary diagonal bracing, providing lateral stiffness to the structure. Under horizontal loads such as major earthquakes, buckling-restrained diagonal bracing can dissipate the energy input from earthquakes through the yielding deformation of its core plate.

[0003] The diagonal bracing and the frame require a gusset plate for connection. However, the opening and closing effect caused by the relative rotational and bending deformation of the frame beams and columns adversely affects the gusset plate. Traditional gusset plates are single plates, fixed to the beam and column ends by welding or bolting. Regardless of whether the frame beams and columns are connected rigidly, semi-rigidly, or hingedly, when the structure is subjected to horizontal loads, the steel frame beams and columns will undergo relative rotation and bending deformation. Because the gusset plate is fixed at the beam-column joint, it suppresses this relative rotation and bending deformation, thus generating an additional opening and closing effect force at the connection between the gusset plate and the beam-column. This results in the gusset plate being subjected to additional and uneven forces, easily leading to localized stress concentration and failure. This causes the gusset plate to prematurely cease bearing load, causing the connected diagonal bracing to prematurely cease functioning and fail to provide disaster resistance, significantly reducing the structure's disaster resistance. In addition, traditional gusset plates can also create a short column effect that has an adverse impact on beams and columns. To delay the failure of the gusset plate and the failure of the connection between the gusset plate and the beam and column, the stiffness of the gusset plate and the strength of the weld will be increased. This will cause the plastic hinge of the beam and column to shift outward, reduce the calculated length of the beam and column, and thus cause a short column effect. As a result, the actual stress on the beam and column exceeds the design value, and thus failure occurs. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to propose a support-type node plate that can rotate in response to the relative rotational deformation of beams and columns. The plate comprises a column-end node plate, a beam-end node plate, and a center plate. The column-end node plate and beam-end node plate are fixed to the column and beam ends, respectively. A driving clamp between the column-end node plate and beam-end node plate holds the center plate. The rear end of the center plate is connected to a diagonal brace. When relative rotational deformation occurs between the column and beam ends, the column-end node plate and beam-end node plate rotate, driving the center plate to move back and forth, causing the diagonal brace to stretch or compress. The aforementioned rotational deformation force is ultimately transmitted to the diagonal brace, where the elastic-plastic stretching or compression offsets the energy-consuming horizontal load, thus improving the seismic performance of the frame structure.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A support-type node plate that can rotate in response to the relative rotational deformation of beams and columns includes a column-end node plate, a beam-end node plate, and a center plate. The column-end node plate and the beam-end node plate are fixed to the column end and the beam end, respectively. A driving clamp between the column-end node plate and the beam-end node plate holds the center plate. The rear end of the center plate is connected to a diagonal brace. When relative rotational deformation occurs between the column end and the beam end, the column-end node plate and the beam-end node plate rotate relative to each other, and the center plate moves back and forth, causing the diagonal brace to be stretched or compressed, thereby releasing the opening and closing effect.

[0007] Furthermore, the column end node plate is provided with a first large arc-shaped long slot on both sides at intervals, and the beam end node plate is provided with a second large arc-shaped long slot on both sides at intervals corresponding to the first large arc-shaped long slot. The center plate is provided with a first center plate arc-shaped hole corresponding to the first large arc-shaped long slot and the second large arc-shaped long slot. The center plate is driven to be installed between the column end node plate and the beam end node plate by means of the first center plate arc-shaped hole, the first large arc-shaped long slot, and the second large arc-shaped long slot, and by means of the installation of an arc-shaped pin.

[0008] Furthermore, the lower ends of the column end node plate are provided with first small arc-shaped long slots on both sides, and the lower ends of the beam end node plate are provided with second small arc-shaped long slots on both sides, corresponding to and matching the first small arc-shaped long slots. The center plate is provided with a second center plate arc-shaped hole corresponding to the first small arc-shaped long slot and the second small arc-shaped long slot. The center plate is driven to be installed between the column end node plate and the beam end node plate by means of the second center plate arc-shaped hole, the first small arc-shaped long slot, and the second small arc-shaped long slot, and by means of an arc-shaped pin.

[0009] Furthermore, the arcs of the first small arc-shaped long slot are staggered from those of the first large arc-shaped long slot, and the arcs of the second small arc-shaped long slot are staggered from those of the second large arc-shaped long slot.

[0010] Furthermore, the design principle of the arc-shaped pin is as follows: to facilitate the relative rotation between the column end node plate and the beam end node plate, the arc surface of the arc-shaped pin in contact with the first large arc-shaped long slot, the second large arc-shaped long slot, the first small arc-shaped long slot, and the second small arc-shaped long slot should not be too large, and it must meet the shear resistance requirements. The specific dimensions can be determined by the following formula: arc-shaped pin width 7 F c =1.2N u ,in This is the design value of the shear bearing capacity of a single arc-shaped pin. This is the design value of the shear strength of a single arc-shaped pin, where n is the number of arc-shaped pins, and F is the design value of the shear strength of a single arc-shaped pin. c It is the design value of the connection force under the axial force of the buckling-restrained support, N u It is the ultimate bearing capacity of the buckling-restrained brace, and the maximum central angle of the arc-shaped pin is... Where r1 is the radius of the circle corresponding to the relatively larger arc in a single arc-shaped slot; the area enclosed by the straight line that rotates 0.5θ1 around the center of rotation of the arc of the arc-shaped slot and the two arcs of the arc-shaped slot is the cross-section of the arc-shaped pin.

[0011] Furthermore, the design principles of the column end node plate and the beam end node plate are the same, specifically: the welding surface between the column end node plate or beam end node plate and the column end or beam end is a plane, intersecting the welding surface and being cut close to the beam end or column end; the cutting range is slightly larger than the maximum central angle θ2 of the arc of the column end node plate or beam end node plate rotating around the actual rotation center; to avoid expansion and contraction deformation of the beam end or column end, the two surfaces of the column end node plate or beam end node plate close to the beam end or column end surface need to be rounded, with the specific rounding radius being such that it does not hinder the free rotation of the column end node plate or beam end node plate and minimizes the reduction of the weld between the column end node plate or beam end node plate and the column end or beam end. The length is standard; the central angle of the first, second, and third largest arc-shaped long slots on the column end gusset plate or beam end gusset plate is twice the maximum central angle θ2; the first, second, and third largest arc-shaped long slots are symmetrically distributed on both sides of the diagonal of the steel frame; the arc length and width of the first, second, and third largest arc-shaped long slots are calculated using the formulas, where the arc width d of the arc-shaped long slot is the width b of the arc-shaped pin, and the maximum central angle is... The longer arc length s1 = r1 × θ2, and the shorter arc length s2 = r2 × θ2, where α is twice the maximum inter-story drift angle.

[0012] Furthermore, the design principle of the center plate is as follows: the center plate is located between the column end node plate and the beam end node plate. When the column end node plate and the beam end node plate rotate relative to each other with the beam end and the column end, the center plate cannot restrict their rotation. Therefore, the center plate is cut in the range close to the beam end and the column end. The cutting range is the superposition of the cutting ranges of the column end node plate and the beam end node plate. Cutting is also required at the welding point between the center plate and the diagonal support. The cutting requirement is that the cutting surface is perpendicular to the axis of the diagonal support. The cutting range does not exceed the safety plate thickness reserved by the first large arc long slot and the second large arc long slot. The dimensions of the first center plate arc hole and the second center plate arc hole on the center plate are the same as those of the arc pin. After the column end node plate or the beam end node plate overlaps with the center plate, the projection of the center plate onto the center plate in a small range on both sides of the centerline of the first large arc long slot, the second large arc long slot, the first small arc long slot, and the second small arc long slot on the column end node plate or the beam end node plate is as follows: refer to the determination of the arc pin dimensions.

[0013] Furthermore, the contact surfaces of the column end node plate, beam end node plate, and center plate remain smooth.

[0014] Furthermore, the column end node plate and the beam end node plate are respectively not in contact with the beam end and the column end and are spaced at a set distance.

[0015] Furthermore, the column end node plate, beam end node plate, and the end of the beam end and column end that are close to each other are all arc-shaped.

[0016] Beneficial effects: When relative rotational deformation occurs between the column end and the beam end, the present invention drives the column end node plate and the beam end node plate to rotate relative to each other and drives the center plate to move back and forth, causing the diagonal support to be stretched or compressed. The above-mentioned rotational deformation force is finally transmitted to the diagonal support, and the horizontal load is consumed by the elastic-plastic stretching or compression of the diagonal support, thereby improving the seismic resistance of the frame structure. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the supporting node plate that can rotate in accordance with the relative rotational deformation of the beam and column, as described in an embodiment of the present invention.

[0019] Figure 2 This is an exploded view of the support-type node plate that can rotate with the relative rotational deformation of the beam and column, as described in an embodiment of the present invention.

[0020] Figure 3 This is a design principle diagram of a column end node plate or beam end node plate of a support type node plate that can rotate with the relative rotational deformation of beams and columns, as described in an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the arc-shaped pin structure of the support-type node plate that can rotate with the relative rotational deformation of the beam and column, as described in an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram (normal state) of the application of the support-type node plate that can rotate with the relative rotation and deformation of the beam and column as described in the embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram (in tension state) of the application of the support-type node plate that can rotate with the relative rotational deformation of the beam and column as described in an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the application (compression state) of the support-type node plate that can rotate with the relative rotational deformation of the beam and column as described in an embodiment of the present invention.

[0025] Figure 8 The force and displacement curves of the diagonal support, which can rotate with the relative rotation and deformation of the beam and column as described in the embodiment of the present invention, are verified in ABAQUS to determine whether the diagonal support undergoes rigid rotation and rigid body slip during operation. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Opening and closing effect: The mutual rotation and bending deformation between beams and columns generate additional forces on the gusset plates connected to them.

[0029] Short column effect: Due to external constraints, the calculated length of the column is reduced, and it can withstand greater shear force.

[0030] Example 1

[0031] See Figure 1-8 A support-type node plate that can rotate with the relative rotational deformation of beams and columns includes a column end node plate 1, a beam end node plate 2, and a center plate 3. The column end node plate 1 and the beam end node plate 2 are fixed to the column end 4 and the beam end 5, respectively. The center plate 3 is driven and clamped between the column end node plate 1 and the beam end node plate 2. The rear end of the center plate 3 is connected to a diagonal support 6. When relative rotational deformation occurs between the column end 4 and the beam end 5, the column end node plate 1 and the beam end node plate 2 are driven to rotate, and the center plate 3 is driven to move back and forth, causing the diagonal support 6 to be stretched or compressed, thereby releasing the opening and closing effect.

[0032] When relative rotational deformation occurs between the column end and the beam end, it causes the column end node plate and the beam end node plate to rotate and drive the center plate to move back and forth, causing the diagonal bracing to be stretched or compressed. The aforementioned rotational deformation force is ultimately transmitted to the diagonal bracing, and the horizontal load is consumed by the stretching or compression of the diagonal bracing, thereby improving the seismic performance of the frame structure.

[0033] In a specific example, the column end node plate 1 has a first large arc-shaped long slot 101 spaced apart on both sides, and the beam end node plate 2 has a second large arc-shaped long slot 201 spaced apart on both sides corresponding to the first large arc-shaped long slot 101. The center plate 3 has a first center plate arc-shaped hole 301 corresponding to the first large arc-shaped long slot 101 and the second large arc-shaped long slot 201. The center plate 3 is driven to be installed between the column end node plate 1 and the beam end node plate 2 by the first center plate arc-shaped hole 301 cooperating with the first large arc-shaped long slot 101 and the second large arc-shaped long slot 201 through the installation of the arc-shaped pin 7.

[0034] In this embodiment, the column end node plate and the beam end node plate are connected to the column and the beam respectively, and are connected by an arc-shaped pin shaft in conjunction with the arc-shaped hole of the first center plate on the center plate. This does not hinder the relative rotation of the beam and column; it effectively releases the relative rotational deformation and bending deformation of the beam and column of the steel frame in the node plate section, reducing the inhibitory effect of the node plate.

[0035] Arc-shaped pin description:

[0036] When relative rotational deformation occurs between the column end and the beam end, it drives the column end node plate and the beam end node plate to rotate, and drives the center plate to rotate through the first large arc-shaped long slot and the second large arc-shaped long slot, thereby causing back-and-forth movement and driving the diagonal support to be stretched or compressed.

[0037] In a specific example, the lower ends of the column end node plate 1 are provided with first small arc-shaped long slots 102 at intervals on both sides, and the lower ends of the beam end node plate 2 are provided with second small arc-shaped long slots 202 at intervals corresponding to the first small arc-shaped long slots 102. The center plate 3 is provided with second center plate arc-shaped holes 302 corresponding to the first small arc-shaped long slots 102 and the second small arc-shaped long slots 202. The center plate 3 is driven to be installed between the column end node plate 1 and the beam end node plate 2 by means of the second center plate arc-shaped holes 302 cooperating with the first small arc-shaped long slots 102 and the second small arc-shaped long slots 202 and by means of the installation of arc-shaped pins 7.

[0038] In this embodiment, a first small arc-shaped long slot and a second small arc-shaped long slot are respectively set at intervals on both sides of the lower end of the column end node plate and the beam end node plate. The center plate is installed in conjunction with the arc-shaped hole of the second center plate and the arc-shaped pin, thereby improving the stability of the center plate rotation and force transmission.

[0039] In a specific example, the arcs of the first small arc-shaped long slot 102 and the first large arc-shaped long slot 101 are offset from each other, and the arcs of the second small arc-shaped long slot 202 and the second large arc-shaped long slot 201 are offset from each other.

[0040] In this embodiment, the arcs corresponding to the large and small arc slots on the same side are staggered as much as possible, instead of choosing arcs intercepted by the same straight line passing through the center of rotation. Since the size of the arc hole on the center plate is the same as the size of the arc pin, the square pin on the same side can be regarded as a rectangular rigid body whose axis does not pass through the center of rotation. Therefore, the rigid body rotation and rigid body sliding of the inclined support can be effectively suppressed.

[0041] In a specific example, the design principle of the arc-shaped pin 7 is as follows: to facilitate the relative rotation of the column end node plate 1 and the beam end node plate 2, the arc surfaces of the arc-shaped pin 7 that contact the first large arc-shaped long slot 101, the second large arc-shaped long slot 201, the first small arc-shaped long slot 102, and the second small arc-shaped long slot 202 should not be too large, and must meet the shear resistance requirements. The specific dimensions can be determined by the following formula: width of arc-shaped pin 7 F c =1.2N u ,in This is the design value of the shear bearing capacity of a single arc-shaped pin. This is the design value of the shear strength of a single arc-shaped pin, where n is the number of arc-shaped pins, and F is the design value of the shear strength of a single arc-shaped pin. c It is the design value of the connection force under the axial force of the buckling-restrained support, N u It is the ultimate bearing capacity of the buckling-restrained brace, and the maximum central angle of the arc-shaped pin 7 is... Where r1 is the radius of the circle corresponding to the relatively larger arc in a single arc-shaped slot; the area enclosed by the straight line that rotates 0.5θ1 around the center of rotation of the arc of the arc-shaped slot and the two arcs of the arc-shaped slot is the cross-section of the arc-shaped pin 7.

[0042] In a specific example, the design principles of the column end node plate 1 and the beam end node plate 2 are the same, specifically: the welding surface between the column end node plate 1 or the beam end node plate 2 and the column end 4 or the beam end 5 is a plane, intersecting the welding surface and being cut close to the beam end 5 or the column end 4; the cutting range is slightly larger than the maximum central angle θ2 of the arc of the column end node plate 1 or the beam end node plate 2 rotating around the actual rotation center; to avoid the expansion and contraction deformation of the beam end 5 or the column end 4, the two surfaces of the column end node plate 1 or the beam end node plate 2 close to the beam end 5 or the column end 4 need to be rounded, and the specific rounding radius is based on not hindering the free rotation of the column end node plate 1 or the beam end node plate 2 and minimizing the reduction in the weld length between the column end node plate 1 or the beam end node plate 2 and the column end 4 or the beam end 5; column The central angle of the arc of the first large arc-shaped long slot 101, the second large arc-shaped long slot 201, the first small arc-shaped long slot 102, and the second small arc-shaped long slot 202 on the end node plate 1 or beam end node plate 2 is twice the maximum central angle θ2; the first large arc-shaped long slot 101, the second large arc-shaped long slot 201, the first small arc-shaped long slot 102, and the second small arc-shaped long slot 202 are symmetrically distributed on both sides of the diagonal of the steel frame; the calculation formulas for the arc length and width of the first large arc-shaped long slot 101, the second large arc-shaped long slot 201, the first small arc-shaped long slot 102, and the second small arc-shaped long slot 202; the arc width d of the arc-shaped long slot is the width b of the arc-shaped pin 7; the maximum central angle θ2... The longer arc length s1 = r1 × θ2, and the shorter arc length s2 = r2 × θ2, where α is the maximum inter-story drift angle.

[0043] In a specific example, the design principle of the center plate 3 is as follows: the center plate 3 is located between the column end node plate 1 and the beam end node plate 2. When the column end node plate 1 and the beam end node plate 2 rotate relative to each other with the beam end 5 and the column end 4, the center plate 3 cannot restrict their rotation. Therefore, the center plate 3 is cut within the range close to the beam end 5 and the column end 4. The cutting range is the superposition of the cutting ranges of the column end node plate 1 and the beam end node plate 2. Cutting is also required at the welding point between the center plate 3 and the diagonal support 6. The cutting requirement is that the cutting surface is perpendicular to the axis of the diagonal support 6, and the cutting range does not exceed the first great circle. The safety plate thickness reserved for the long slot 101 and the second large arc long slot 201, the size of the first center plate arc hole 301 and the second center plate arc hole 302 on the center plate 3 are the same as those of the arc pin 7. After the column end node plate 1 or the beam end node plate 2 overlaps with the center plate 3, the projection of the center plate 3 on the small area on both sides of the center line of the first large arc long slot 101, the second large arc long slot 201 and the first small arc long slot 102 and the second small arc long slot 202 of the column end node plate 1 or the beam end node plate 2 is as follows: For specific projection, please refer to the determination of the size of the arc pin 7.

[0044] In a specific example, the contact surfaces of the column end node plate 1, the beam end node plate 2, and the center plate 3 remain smooth.

[0045] In this embodiment, a low-friction material, such as butyl rubber, can be added to the contact surface between the column end node plate, the beam end node plate, and the center plate to reduce the friction generated during rotation.

[0046] In a specific example, the column end node plate 1 and the beam end node plate 2 are not in contact with the beam end 5 and the column end 4, respectively, and are spaced at a set distance.

[0047] In this embodiment, the column end node plate and the beam end node plate do not contact the beam end and the column end respectively and maintain an appropriate distance. This ensures that when the node plate is closed, the column end node plate and the beam end node plate will not contact the beam end and the column end when rotating inward, thus avoiding interference and affecting the rotation of the node plate.

[0048] In a specific example, the column end node plate 1, the beam end node plate 2, the beam end 5, and the column end 4 are all designed with an arc shape at their closest points.

[0049] The arc-shaped design of the column end node plate and beam end node plate in this embodiment can provide clearance space for the relative rotation of the column end node plate and beam end and column end, and facilitate the relative rotation of the two.

[0050] It should be noted that the column end gusset plate, beam end gusset plate, and center plate together form a whole located in the middle of the beam-column flange. The column end gusset plate is welded to the column, and the beam end gusset plate is welded to the beam.

[0051] The support-type node plate in this embodiment verifies whether the diagonal support undergoes rigid rotation and rigid body slip during operation in ABAQUS. The verification process is as follows:

[0052] In ABAQUS, the beams and columns of the model are hinged, and the entire frame is fixed to the ground. A horizontal displacement is applied to the upper beam. A reference point is selected in the upper beam, and after ABAQUS calculations, the force-displacement curves are derived, as shown below. Figure 7 As shown: if the curve shows no abrupt change, it proves that the inclined support has not undergone rigid body rotation or rigid body sliding.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A support-type node plate that can rotate in accordance with the relative rotational deformation of beams and columns, characterized in that, Includes a column end node plate (1), a beam end node plate (2), and a center plate (3). The column end node plate (1) and the beam end node plate (2) are fixed to the column end (4) and the beam end (5), respectively. The column end node plate (1) and the beam end node plate (2) are not in contact with the beam end (5) and the column end (4), respectively. The ends of the column end node plate (1) and the beam end node plate (2) that are close to the beam end (5) and the column end (4) are all arc-shaped. The column end node plate (1) and the beam end node plate (2) are... 2) Both are provided with arc-shaped long slots. The center plate (3) is clamped between the column end node plate (1) and the beam end node plate (2) by the arc-shaped pin (7). The rear end of the center plate (3) is connected to the diagonal support (6). When the column end (4) and the beam end (5) undergo relative rotational deformation, the column end node plate (1) and the beam end node plate (2) are driven to rotate relative to each other. The center plate (3) is driven by the arc-shaped pin (7) to drive the diagonal support (6) to stretch or compress, thereby releasing the opening and closing effect.

2. The support-type node plate that can rotate with the relative rotational deformation of the beam and column according to claim 1, characterized in that, The column end node plate (1) is provided with a first large arc-shaped long slot (101) spaced apart on both sides. The beam end node plate (2) is provided with a second large arc-shaped long slot (201) spaced apart on both sides, corresponding to the first large arc-shaped long slot (101). The center plate (3) is provided with a first center plate arc hole (301) corresponding to the first large arc-shaped long slot (101) and the second large arc-shaped long slot (201). The center plate (3) is installed between the column end node plate (1) and the beam end node plate (2) by installing an arc-shaped pin (7) through the first center plate arc hole (301) cooperating with the first large arc-shaped long slot (101) and the second large arc-shaped long slot (201).

3. The support-type node plate that can rotate with the relative rotational deformation of the beam and column according to claim 2, characterized in that, The column end node plate (1) is provided with a first small arc-shaped long slot (102) at intervals on both sides of its lower end. The beam end node plate (2) is provided with a second small arc-shaped long slot (202) at intervals on both sides of its lower end, which corresponds to and matches the first small arc-shaped long slot (102). The center plate (3) is provided with a second center plate arc hole (302) corresponding to the first small arc-shaped long slot (102) and the second small arc-shaped long slot (202). The center plate (3) is installed between the column end node plate (1) and the beam end node plate (2) by means of the second center plate arc hole (302) cooperating with the first small arc-shaped long slot (102) and the second small arc-shaped long slot (202) and by means of the installation of the arc-shaped pin (7).

4. The support-type node plate that can rotate with the relative rotational deformation of the beam and column according to claim 3, characterized in that, The arcs of the first small arc-shaped long slot (102) and the first large arc-shaped long slot (101) are offset from each other, and the arcs of the second small arc-shaped long slot (202) and the second large arc-shaped long slot (201) are offset from each other.

5. The support-type node plate that can rotate with the relative rotational deformation of the beam and column according to claim 3, characterized in that, The design principle of the arc-shaped pin (7) is as follows: In order to facilitate the relative rotation between the column end node plate (1) and the beam end node plate (2), the arc surface of the arc-shaped pin (7) in contact with the first large arc-shaped long slot (101), the second large arc-shaped long slot (201), the first small arc-shaped long slot (102), and the second small arc-shaped long slot (202) should not be too large, and it must meet the shear resistance requirements. The specific dimensions are determined by the following formula: width of arc-shaped pin (7) ,in, = , =1.2 , This is the design value of the shear bearing capacity of a single arc-shaped pin. This is the design value of the shear strength of a single arc-shaped pin, where n is the number of arc-shaped pins. This is the design value of the connecting force on the arc-shaped pin. It is the ultimate bearing capacity of the diagonal bracing; the maximum central angle of the arc-shaped pin (7) is Where r1 is the radius of the circle corresponding to the relatively larger outer arc in a single arc-shaped slot; the arc is rotated 0.5 degrees outwards around the center of rotation. The area enclosed by the straight line and the two arc lines of the arc-shaped slot is the cross section of the arc-shaped pin (7).

6. The support-type node plate that can rotate with the relative rotational deformation of the beam and column according to claim 5, characterized in that, The design principles of the column end node plate (1) and the beam end node plate (2) are the same. Specifically, the welding surface between the column end node plate (1) or the beam end node plate (2) and the column end (4) or the beam end (5) is a plane. The end that intersects with the welding surface and is close to the beam end (5) or the column end (4) is cut. The cutting range is slightly larger than the maximum central angle of the arc of the column end node plate (1) or the beam end node plate (2) around the actual rotation center. The two surfaces of the column end node plate (1) or beam end node plate (2) near the beam end (5) or column end (4) need to be rounded. The specific rounding radius is based on not hindering the free rotation of the column end node plate (1) or beam end node plate (2) and minimizing the reduction of the weld length between the column end node plate (1) or beam end node plate (2) and the column end (4) or beam end (5). The central angle of the arc of the first large arc long slot (101), the second large arc long slot (201) and the first small arc long slot (102) and the second small arc long slot (202) on the column end node plate (1) or beam end node plate (2) is twice the maximum arc central angle. The first large arc-shaped long slot (101), the second large arc-shaped long slot (201), the first small arc-shaped long slot (102), and the second small arc-shaped long slot (202) are symmetrically distributed on both sides of the diagonal of the steel frame; the calculation formulas for the arc length and width of the first large arc-shaped long slot (101), the second large arc-shaped long slot (201), the first small arc-shaped long slot (102), and the second small arc-shaped long slot (202), and the arc width of the arc-shaped long slot. That is, the width of the arc-shaped pin (7) Maximum central angle of the arc Then the length of the larger arc s1 = r1 × The smaller arc length s2 = r2 × ,in It is twice the maximum inter-story drift angle.

7. The support-type node plate that can rotate with the relative rotational deformation of the beam and column according to claim 6, characterized in that, The design principle of the center plate (3) is as follows: the center plate (3) is located between the column end node plate (1) and the beam end node plate (2). When the column end node plate (1) and the beam end node plate (2) rotate relative to each other with the beam end (5) and the column end (4), the center plate (3) does not restrict their rotation. Therefore, the center plate (3) is cut in the range close to the beam end (5) and the column end (4). The cutting range is the superposition of the cutting range of the column end node plate (1) and the beam end node plate (2). Cutting is also required at the welding point between the center plate (3) and the diagonal support (6). The cutting requirement is that the cutting surface is perpendicular to the axis of the diagonal support (6), and the cutting range does not exceed the first large arc-shaped long slot (1). 01) The safety plate thickness reserved in the second large arc long slot (201), the size of the first center plate arc hole (301) and the second center plate arc hole (302) on the center plate (3) are the same as the arc pin (7). After the column end node plate (1) or beam end node plate (2) overlaps with the center plate (3), the projection of the center plate (3) on the center plate (3) on both sides of the center line of the first large arc long slot (101), the second large arc long slot (201) and the first small arc long slot (102) and the second small arc long slot (202) of the column end node plate (1) or beam end node plate (2) is small. For specific projection, refer to the determination of the size of the arc pin (7).

8. The support-type node plate that can rotate with the relative rotational deformation of the beam and column according to claim 1, characterized in that, The contact surfaces of the column end node plate (1), beam end node plate (2) and center plate (3) remain smooth.

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