An installation structure and construction method for a combination of columns and solid web beams

Abstract

An installation structure and construction method for a composite column and solid web beam include composite columns with solid web beams distributed between them. Each solid web beam includes a first node and two rolled-edge steel sections welded together on their webs. The first node is welded to the end face of the solid web beam. The composite column includes a second node and a column structure formed by several vertical rolled-edge steel sections assembled together. The second node is welded to the column structure. When the solid web beam rotates around its centerline in a horizontal plane, the first nodes at both ends are respectively inserted into the corresponding second nodes and connected by bolts. By using special nodes and rolled-edge steel sections to weld and assemble beams and columns, and coordinating with a rotating installation method, the nodes at both ends of the solid web beam can be quickly inserted into the corresponding nodes on the column, reducing labor costs and improving construction efficiency. The composite columns and solid web beams are respectively assembled and welded using corresponding unified nodes and rolled-edge steel sections, improving factory production efficiency and quality.

Description

Technical Field

[0001] This invention relates to the field of prefabricated buildings, specifically to an installation structure and construction method for a combination of columns and solid beams. Background Technology

[0002] Common steel structure systems can be divided into frame (bracing) structure systems composed of H-beams, square steel tubes, and other steel sections, and wall-bearing structure systems composed of cold-formed thin-walled steel sections and structural wall panels. By using complex, reinforced, and thickened cold-formed steel sections, new high-performance cross-sectional forms can be assembled to form the main components of frame structures. Coupled with new node forms that meet the requirements of prefabricated buildings, this can become a viable option for modern industrialized construction.

[0003] Currently, in steel structure systems formed by rolled-edge steel sections, beams and columns are mainly connected by welding and bolting. Specifically, the first connecting plate is first welded or bolted to the column, and the second connecting plate is welded or bolted to the beam. During on-site construction, after the column is erected, the beam is lifted, and then the second connecting plate and the first connecting plate are aligned and pre-positioned with bolts. During pre-positioning, at least two workers are required to be positioned at both ends of the beam and connect the first and second connecting plates together with bolts. Only after the first and second connecting plates at both ends of the beam are pre-positioned can the crane lift the next beam. Because the pre-positioning time between the first and second connecting plates is long and the number of workers required is large, the current beam and column assembly efficiency is low and the cost is high. A solid web beam is generally a straight beam. When the nodes at both ends of the beam need to be connected to the nodes on the column, one worker is required to position the solid web beam, while another worker is responsible for fixing one end of the solid web beam to the column. Then, the worker responsible for positioning the beam goes to the other end of the solid web beam and fixes it to another column. This method is costly and inefficient. Summary of the Invention

[0004] To address the problems in the existing technology, this invention provides an installation structure and construction method for a combined column and solid web beam, aiming to facilitate the mass production of beams and columns in the factory and improve the efficiency and quality of on-site construction of beams and columns.

[0005] An installation structure for a combined column and a solid web beam includes a combined column, with solid web beams distributed between the combined columns. Each solid web beam includes a first node and two rolled-edge steel sections welded together on their webs. The first node is welded to the end face of the solid web beam. The combined column includes a second node and a column structure formed by a plurality of vertical rolled-edge steel sections assembled together. Connecting plates are clamped and welded between the rolled-edge steel sections in the column structure. The second node is welded to the column structure. When the solid web beam rotates in a horizontal plane around its centerline, the first nodes at both ends of the solid web beam are respectively inserted into the corresponding second nodes from the front and back of the combined column and then connected by bolts.

[0006] Further, the first node and the second node have the same structure and include a vertical first fixing plate. A horizontal first connecting plate and a horizontal second connecting plate are fixedly connected to the upper and lower ends of the first fixing plate, respectively. A vertical third connecting plate is welded to the first fixing plate at a position between the first and second connecting plates. The upper end of the third connecting plate is welded to the first connecting plate, and the lower end of the third connecting plate has an insertion gap and forms an insertion groove with the second connecting plate. The first fixing plate in the first node is in an inverted state and is attached to and welded to the end face of the solid web beam. The second node... A fixing plate is in a forward-facing state and is attached to and welded to the side of the combined column; the first fixing plate in the first node is in an inverted state, so that the insertion slot is located above the corresponding third connecting plate, and the insertion slot in the second node is located below the corresponding third connecting plate; during insertion, the first connecting plate in the first node is inserted into the insertion slot in the second node, and at the same time, the first connecting plate in the second node is inserted into the insertion slot in the first node, so that the first connecting plate, the second connecting plate and the third connecting plate in the first node are respectively attached to and bolted to the second connecting plate, the first connecting plate and the third connecting plate in the second node.

[0007] Furthermore, a first reinforcing plate is fixedly connected between the first connecting plate and the second connecting plate, and at a position away from the insertion gap, wherein the first reinforcing plate is located on one side of the third connecting plate.

[0008] Furthermore, the column structure includes a rectangular cross-section in the form of a closed shape, which is formed by four rolled steel sections gathered together. The four rolled steel sections are arranged in a centrally symmetrical manner, and the opening directions of the rolled steel sections are arranged in pairs facing each other. One end of the connecting plate is located between two of the rolled steel sections, and the other end of the connecting plate is located between the other two rolled steel sections.

[0009] Furthermore, a vertical second reinforcing plate is welded to the first fixing plate and is set perpendicular to it. The second reinforcing plate is clamped between the four rolled steel sections in the column structure and welded thereto.

[0010] A construction method for combined columns and solid beams involves using independent foundations with pre-embedded anchor bolts. The column bases of the combined columns are connected to these anchor bolts. Positioning bolts are installed between the column bases and the independent foundations, and the column bases are leveled. A gap is left between the column bases and the independent foundations, and fine aggregate concrete is poured into this gap. After the combined columns are constructed, a crane is used to sequentially lift the solid beams between the corresponding combined columns. The crane's lifting rope and the center point of the solid beam are aligned on the same straight line. The center point of the solid beam is located at the center point between the two corresponding connection nodes, and the two ends of the solid beam are located on opposite sides of the two combined columns. Workers swing the solid beam at one end and assemble it between the corresponding combined columns using a counter-clockwise or clockwise method. After the crane has lifted the solid beams, workers bolt the corresponding nodes according to energy consumption requirements and specified torque.

[0011] The beneficial effects of this invention are as follows: Beams and columns are welded and assembled using special nodes and rolled-edge steel sections. The first nodes at both ends of the solid-web beam are inserted into the corresponding second nodes from the front and back of the combined column, respectively, and then connected by bolts. This facilitates quick operation by a single person rotating the solid-web beam, improving crane utilization, reducing costs, and increasing construction efficiency. The combined column and solid-web beam are welded together using corresponding unified nodes and rolled-edge steel sections. The first and second nodes have identical structures, improving factory production efficiency and quality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention;

[0013] Figure 2 for Figure 1 Enlarged view of the structure of region A in the middle;

[0014] Figure 3 This is a schematic diagram of the connection structure between the fourth node and the second reinforcing plate in this invention;

[0015] Figure 4 This is a cross-sectional view of the combined column in this invention.

[0016] In the diagram, 1 is a composite column; 11 is a rolled-edge steel section; 2 is a solid web beam; 3 is the first node; 31 is the first connecting plate; 32 is the third connecting plate; 33 is the first fixing plate; 34 is the first reinforcing plate; 35 is the second connecting plate; 36 is the second reinforcing plate; 4 is the second node; 5 is the column base; 6 is an independent foundation; and 61 is fine aggregate concrete. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings. Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The directional terms such as left, center, right, top, and bottom used in the embodiments of the present invention are only relative concepts or referenced to the normal use state of the product, and should not be considered restrictive.

[0018] An installation structure for a combined column 1 and a solid web beam 2 includes a combined column 1, with solid web beams 2 distributed between the combined columns 1. Each solid web beam 2 includes a first node 3 and two rolled-edge steel sections 11 welded together on their webs. The first node 3 is welded to the end face of the solid web beam 2. The combined column 1 includes a second node 4 and a column structure formed by a plurality of vertical rolled-edge steel sections 11 assembled together. In the column structure, the rolled-edge steel sections 11 are clamped and welded together with connecting plates. The second node 4 is welded to the column structure. When the solid web beam 2 rotates around its center line in the horizontal plane, the first nodes 3 at both ends of the solid web beam 2 are inserted into the corresponding second nodes 4 from the front and back of the combined column 1, respectively, and then connected by bolts.

[0019] Currently, there is no structure for interlocking nodes. After interlocking, it is necessary to ensure that the second node 4 supports the first node 3 so that the crane can carry out subsequent lifting work. To improve the stability, connection strength, and structural compactness of the first node 3 and the second node 4 after interlocking, combined with... Figure 2As shown, the first node 3 and the second node 4 have the same structure and include a vertical first fixing plate 33. A horizontal first connecting plate 31 and a horizontal connecting plate 35 are fixedly connected to the upper and lower ends of the first fixing plate 33, respectively. A vertical third connecting plate 32 is welded to the first fixing plate 33 at a position between the first connecting plate 31 and the second connecting plate 35. The upper end of the third connecting plate 32 is welded to the first connecting plate 31, and the lower end of the third connecting plate 32 has an insertion gap and forms an insertion groove with the second connecting plate. The first fixing plate 33 in the first node 3 is in an inverted state and is attached to and welded to the end face of the solid web beam 2. The first fixing plate 33 in the second node 4 is... Plate 33 is in a forward-facing state and is attached and welded to the side of the combined column 1; the first fixing plate 33 in the first node 3 is in an inverted state, so that the insertion slot is above the corresponding third connecting plate 32, and the insertion slot in the second node 4 is below the corresponding third connecting plate 32; during insertion, the first connecting plate 31 in the first node 3 is inserted into the insertion slot in the second node 4, and at the same time, the first connecting plate 31 in the second node 4 is inserted into the insertion slot in the first node 3, so that the first connecting plate 31, the second connecting plate 35, and the third connecting plate 32 in the first node 3 are respectively attached and bolted to the second connecting plate 35, the first connecting plate 31, and the third connecting plate 32 in the second node 4. A first reinforcing plate 34 is fixedly connected between the first connecting plate 31 and the second connecting plate 35 and at a position away from the insertion gap, and the first reinforcing plate 34 is located on one side of the third connecting plate 32.

[0020] To improve the overall structural strength of the column structure, the column structure includes a closed rectangular cross-section formed by four rolled-edge steel sections 11 clustered together. The four rolled-edge steel sections 11 are centrally symmetrically arranged, with the openings of the rolled-edge steel sections 11 facing each other in pairs. One end of the connecting plate is located between two of the rolled-edge steel sections 11, and the other end of the connecting plate is located between the other two rolled-edge steel sections 11. A vertical second reinforcing plate 36 is welded to the first fixing plate 33 and is perpendicular to it. The second reinforcing plate 36 is clamped between the four rolled-edge steel sections 11 in the column structure and welded to it. In this invention, all rolled-edge steel sections 11 are G-shaped steel sections. The G-shaped steel section adopts the G-shaped steel component disclosed in CN207032476U, a type of bundled composite component. Similarly, the G-shaped steel section includes a base plate and two side plates disposed on both sides of the base plate in the width direction. The web of the rolled-edge steel section 11 is the base plate of the G-shaped steel section, specifically a flat plate structure. The ends of the two side plates furthest from the base plate are respectively folded inwards towards each other with flanges. The opposite ends of the two flanges of the same G-shaped steel component are folded inwards towards the base plate with reinforcing edges, thus forming constrained edges. Specifically, these constrained edges are semi-constrained edges, while the base plate and side plates are fully constrained edges. The reinforcing edges allow the corresponding flanges to effectively bear loads, thereby effectively improving the strength of the G-shaped steel section.

[0021] The construction method of the present invention, such as Figure 1 As shown, independent foundations 6 are used, with anchor bolts pre-embedded within them. The column bases 5 of the composite column 1 are connected to these anchor bolts. Positioning bolts are installed between the column bases 5 and the independent foundations 6, and the column bases 5 are leveled. A 50mm gap is left between the column bases 5 and the independent foundations 6, and fine aggregate concrete 61 is poured into this gap. After the composite column 1 is constructed, solid web beams 2 are sequentially hoisted between the corresponding composite columns 1 using a crane. The solid web beams 2 are assembled between the corresponding composite columns 1 using either a counter-clockwise or clockwise method, with both ends of the solid web beams 2 located on opposite sides of the two composite columns. After all the solid web beams 2 have been hoisted by the crane, workers bolt the corresponding nodes according to energy consumption requirements and specified torque. This system is adapted to computer-aided design, and customized intelligent BIM software has been developed, enabling automatic structural design, construction drawing creation, bill of quantities submission, detailed fabrication drawing creation, and automatic generation of the BIM model.

[0022] Compared to existing technologies, when a solid-web beam is inserted into a node of two columns from the same side, the beam's swing at one end causes the other end to move in the opposite direction, making it difficult to insert both ends simultaneously. This requires two people to simultaneously move the lifting ropes at both ends of the beam to insert them into the column nodes. In this invention, the lifting ropes can directly place the center point of the solid-web beam between the nodes of the two columns, with both ends located on opposite sides of the two columns. After the beam swings around its center line, both ends can be simultaneously inserted into the corresponding column nodes.

[0023] 1. The innovative use of complex rolled-edge cold-formed steel (i.e., the rolled-edge steel) to form beam and column components of the frame structure breaks through the limitation that cold-formed thin-walled steel is not used in frame structures and expands the application range of cold-formed steel.

[0024] 2. The proposed structural form requires only one type of cold-formed steel section size (the steel wall thickness is determined by design calculations), thus enabling efficient fabrication and cutting of the section. The beams, columns, and corresponding nodes are all assembled and fabricated in the factory and bolted on-site, making it a practical model and demonstration of new building industrialization.

[0025] 3. A complete set of node series was proposed, in which thickened plates were used for all nodes. The thickened plates were welded with cold-formed steel, which solved the weakness of the small wall thickness of cold-formed steel and the easy damage of the connection at the node, thus expanding the application range of cold-formed steel.

[0026] 4. The proposed series of nodes are all standard-sized nodes, which facilitates efficient assembly and welding by robots on standard tooling fixtures.

[0027] 5. The proposed centrally symmetrical composite column and node construction form features a thickened central vertical node plate at the node, adding a "hard bone" to the thin-walled composite column. This eliminates the need to break the composite column to create a transverse through-plate node, thus improving the manufacturing quality of the components.

[0028] 6. A rotary assembly method is proposed. On the one hand, it keeps the axis of the combined column through the corresponding node, making structural calibration simpler and more reliable. On the other hand, the end nodes of the beam are always offset to one side, so a standard node can be made, which simultaneously meets the node construction requirements at both ends of the beam.

[0029] 7. All beam-column bolted joints are designed as seismic energy-dissipating nodes. By allowing on-site bolt connections, the beam ends can rotate within a 1 / 50 angle, forming a "plastic hinge" with limited deformation. The plate contact surfaces of the joints are treated with sandblasting and shot peening to create a friction surface with a certain coefficient of friction. By applying the designed torque, the designed frictional force is generated. Under normal use, slippage does not occur, but under seismic loads, slippage dissipates seismic energy, achieving the effect of a metal friction damper. Therefore, all beam-column joints are seismic energy-dissipating nodes, enabling the structural ductility achieved through cross-sectional plastic deformation in traditional steel structures to be realized through the relative displacement of the designed joint friction surfaces, avoiding the weaknesses of traditional cold-formed steel in terms of low ductility and seismic performance.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An installation structure combining a column and a solid web beam, characterized in that: The system includes composite columns, with solid-web beams distributed between the composite columns. Each solid-web beam includes a first node and two rolled-edge steel sections welded together on their webs. The first node is welded to the end face of the solid-web beam. The composite columns include a second node and a column structure formed by a plurality of vertical rolled-edge steel sections. The rolled-edge steel sections in the column structure are clamped and welded together with connecting plates. Specifically, the column structure includes a rectangular section in the form of a closed opening formed by four rolled-edge steel sections. The four rolled-edge steel sections are centrally symmetrically arranged, and the opening directions of the rolled-edge steel sections are arranged in pairs facing each other. One end of the connecting plate is located between two of the rolled-edge steel sections, and the other end of the connecting plate is located between the other two rolled-edge steel sections. The second node is welded to the column structure. When the solid beam rotates around its centerline in the horizontal plane, the first nodes at both ends of the solid beam are respectively inserted into the corresponding second nodes from the front and back of the combined column and then connected by bolts. Specifically, the first node and the second node have the same structure and include a vertical first fixing plate. A horizontal first connecting plate and a second connecting plate are fixedly connected to the upper and lower ends of the first fixing plate, respectively. A vertical third connecting plate is welded to the first fixing plate at a position between the first connecting plate and the second connecting plate. The upper end of the third connecting plate is welded to the first connecting plate, and the lower end of the third connecting plate has an insertion gap and forms an insertion groove with the second connecting plate. The first fixing plate in the first node is in an inverted state and is attached to and welded to the end face of the solid beam. The first fixing plate in the second node is in a forward-facing state and is attached to and welded to the side of the combined column; the first fixing plate in the first node is in an inverted state, such that the insertion slot is located above the corresponding third connecting plate, and the insertion slot in the second node is located below the corresponding third connecting plate; during insertion, the first connecting plate in the first node is inserted into the insertion slot in the second node, and at the same time, the first connecting plate in the second node is inserted into the insertion slot in the first node, so that the first connecting plate, the second connecting plate, and the third connecting plate in the first node are respectively attached to and bolted to the second connecting plate, the first connecting plate, and the third connecting plate in the second node; a first reinforcing plate is fixedly connected between the first connecting plate and the second connecting plate and at a position away from the insertion gap, and the first reinforcing plate is located on one side of the third connecting plate.

2. The installation structure of the combined column and solid web beam according to claim 1, characterized in that: A vertical second reinforcing plate is welded to the first fixing plate and is set perpendicular to it. The second reinforcing plate is clamped between and welded to the four rolled steel sections in the column structure.

3. A construction method for a combination of columns and solid-web beams, characterized in that: Based on the installation structure of the combined column and solid beam as described in claim 1 or 2, an independent foundation is used with pre-embedded anchor bolts in the independent foundation. The column base of the combined column is connected to the anchor bolts. Installation positioning bolts are set between the column base and the independent foundation, and the column base is leveled. A gap is reserved between the column base and the independent foundation, and fine stone concrete is poured into the gap. After the combined column is constructed, the solid beam is hoisted into the corresponding combined column in sequence by a crane. The hoisting rope of the crane and the center point of the solid beam are on the same straight line. The center point of the solid beam is located at the center point between the two corresponding connection nodes. The two ends of the solid beam are located on opposite sides of the two combined columns. Workers swing the solid beam at one end and assemble it between the corresponding combined columns using a counterclockwise or clockwise method. After the crane has hoisted the solid beam, the workers bolt the corresponding nodes according to the energy consumption requirements and the specified torque.

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