A structural design for connecting steel columns and beams in buildings for adding elevators

Abstract

A structural design for connecting steel columns and beams for elevator installation in buildings, relating to the field of building component technology, improves the connection structure between the columns and beams, avoiding quality control issues arising from on-site welding, and ensuring strength, safety factor, and workload. The design includes vertically arranged columns with at least one set of brackets fixed laterally. Each set of brackets has several corresponding bolt holes. Each set of brackets consists of two opposing pieces, with a beam positioned between them. The beam has threaded holes corresponding to the bolt holes, and fastening bolts are installed on the brackets, engaging with the threaded holes through the bolt holes. The end connecting the beam and the bracket is thickened.

Description

Technical Field

[0001] This utility model relates to the field of building component technology, specifically to a connection node structure for adding elevator steel columns and steel beams to a building. Background Technology

[0002] To adapt to economic and social development, improve the functionality of existing residential buildings, promote age-friendly renovations, and enhance livability, the installation of elevators in existing buildings has become a mainstream trend. In elevator installation projects, steel frame structures have become the mainstream solution due to their advantages such as lightweight design and rapid construction. However, traditional steel column-beam connection methods have significant drawbacks due to limitations such as narrow spaces in older residential areas, risks associated with high-altitude operations, and disruption to residents' lives.

[0003] For example, the invention application with application number CN202311698374.0 discloses a connection node structure between a new elevator and an existing building and its construction method; the connection node structure of this invention improves the vertical long bolt connection method, solves the problems of unclear vertical force transmission and poor horizontal spacing adjustment of the connection node, optimizes the construction process to the greatest extent, improves the force transmission method of the connection node between the new elevator and the existing building, and ensures the safety of the existing building structure.

[0004] However, in this application, the common practice is to use on-site welding of steel columns and steel beams or welding of lap plates. The connection between steel columns and steel beams is usually done by welding. However, in actual operation, welding is prone to quality defects such as porosity, incomplete penetration, and weld beads. On-site welding is also prone to large dimensional deviations, and high-altitude welding operations also pose significant risks, making it difficult to guarantee the pass rate. Utility Model Content

[0005] I. Technical problems to be solved

[0006] This utility model addresses the shortcomings of existing technologies by proposing a connection node structure for adding elevator steel columns and beams to buildings. By improving the connection structure of the columns and beams, the quality control problems caused by on-site welding are avoided, and the strength, safety factor, and workload can all be guaranteed.

[0007] II. Specific Technical Solutions

[0008] A structural design for connecting steel columns and beams for elevator installation in buildings includes a vertically arranged column, with at least one set of brackets fixed laterally on the column; each set of brackets has several corresponding bolt holes; each set of brackets consists of two opposing pieces, with a crossbeam between each set of brackets; the crossbeam has threaded holes corresponding to the bolt holes, and fastening bolts are installed on the brackets, the fastening bolts engaging with the threaded holes through the bolt holes; the end connecting the crossbeam and the bracket is a thickened end.

[0009] Implementation principle and working principle:

[0010] In this solution, the bracket is first installed on the column using an integral molding or welding method. Then, the column and beam with brackets are transported to the construction site for assembly. During actual assembly, the bolt holes and threaded holes are aligned, and the bolts are passed through the bolt holes and tightened into the threaded holes using a threaded connection. The end of the beam that connects to the bracket is thickened, which effectively improves the connection strength and provides sufficient length for the threaded holes to ensure connection stability. More importantly, using bolt fastening instead of on-site welding is more conducive to ensuring connection quality and has a higher safety factor.

[0011] Preferably, there are two sets of bolt holes, with two bolt holes in each set, and the bolt holes are evenly distributed on the bracket. The advantage of this preferred embodiment is that the evenly distributed bolt holes can effectively disperse the force, making the force between the beam and the bracket more reasonable.

[0012] Preferably, the bracket is welded or integrally formed on the column; and the planar projection length of the bracket is greater than the width of the thickened end of the crossbeam. The beneficial effect of this preferred embodiment is that the size specifications of the bracket and the specifications of the thickened end of the crossbeam can effectively ensure that the crossbeam is covered and that the bracket has sufficient compressive or shear strength.

[0013] Preferably, the thickness of the thickened end of the crossbeam is 1.2 to 1.5 times the thickness of other parts of the crossbeam, and the depth of the threaded hole is not less than 1.2 times the nominal diameter of the fastening bolt. The beneficial effect of this preferred option is that the thickened end of the crossbeam can effectively improve the shear strength at its connection, and the thickening treatment can increase the thread depth of the threaded hole, avoiding thread peeling failure caused by local pressure.

[0014] Preferably, the bolt holes of the bracket are oblong holes, with the length of the holes extending along the axis of the crossbeam. The advantage of this preferred design is that the oblong holes can improve the tolerance of on-site assembly and also accommodate the installation errors of existing buildings.

[0015] Preferably, a shear key is provided on one side of each set of corbels; receiving grooves that cooperate with the shear key are provided on both sides of the thickened end; the beneficial effect of this preferred embodiment is that by setting the shear key, the corbel can be thickened, thereby improving its shear resistance; the receiving groove can cooperate well with the shear key to achieve the shear resistance effect, improve its connection strength, and the receiving groove is located at the end, so it will not affect the shear strength on the side where the bolt is located.

[0016] Preferably, a reinforcing sleeve is also provided at the thickened end; the reinforcing sleeve corresponds to the bolt hole; the threaded hole is provided on the inner side of the reinforcing sleeve; the beneficial effect of this preferred embodiment is that by providing a reinforcing sleeve, the point fit between the thickened end and the bolt hole is transformed into a curved surface fit, thus avoiding cracking of the thickened end under stress.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. Compared with the existing welding method, this solution allows the bracket and column to be directly formed and connected in the factory area. When connecting to the crossbeam, it can be completed by tightening bolts. The threaded hole set at the thickened end can ensure the tightness of the connection, reduce the number of components used, and make it easier to control the strength and quality.

[0019] 2. By converting bolt holes into elongated holes, the tolerance for errors in on-site assembly can be improved, and the installation errors of existing buildings can also be accommodated.

[0020] 3. The reinforced sleeve effectively improves the fit between the thickened end and the bolt hole, transforming it into a curved surface fit, thus preventing the thickened end from cracking under stress. The shear key thickens the bracket, enhancing its shear resistance. The receiving groove works well with the shear key to achieve shear resistance, and since it is located at the end, it does not affect the shear strength on the bolt side. Attached Figure Description

[0021] Figure 1 This is a side view of the column-beam connection structure according to an embodiment of the present utility model.

[0022] Figure 2 This is a top view schematic diagram of the column-beam connection structure according to an embodiment of this utility model.

[0023] Figure 3 This is a cross-sectional schematic diagram of the fit between the shear key and the receiving groove in an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Column, 2. Bracket, 3. Bolt hole, 4. Threaded hole, 5. Fastening bolt, 6. Thickened end, 7. Shear key, 8. Receiving groove, 9. Reinforcing sleeve, 10. Detailed Implementation

[0026] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] like Figure 1-3 As shown:

[0028] A structural design for connecting steel columns and beams for adding elevators to buildings includes a vertically installed steel column 1. Figure 1 In this embodiment, a set of brackets 2 are fixedly installed on the left side of the column 1. The two brackets 2 are symmetrically welded or integrally formed on the right side of the column 1. Several corresponding bolt holes 3 are opened on the brackets 2. A crossbeam 4 is arranged between the brackets 2. The crossbeam 4 is provided with threaded holes 5 corresponding to the bolt holes 3, and fastening bolts 6 are provided on the outside of the brackets 2. The fastening bolts 6 pass through the bolt holes 3 and are threadedly connected to the threaded holes 5. The end of the crossbeam 4 connected to the brackets 2 is a thickened end 7.

[0029] In specific implementation, there are two sets of bolt holes 3, with two bolt holes 3 in each set. These bolt holes 3 are evenly distributed on the bracket 2, specifically in a horizontal rectangular distribution in this embodiment. The evenly distributed bolt holes 3 can effectively disperse the force, making the force between the beam 4 and the bracket 2 more reasonable. In implementation, the planar projection length of the bracket 2 is greater than the width of the thickened end 7 at the end of the beam 4. The size specifications of the bracket 2 and the thickened end 7 can effectively ensure that the thickened end 7 is covered, ensuring that the bracket 2 has sufficient compressive or shear strength.

[0030] During implementation, the thickness of the thickened end 7 at the end of the crossbeam 4 is 1.2 to 1.5 times the thickness of other parts of the crossbeam 4, and the depth of the threaded hole 5 is not less than 1.2 times the nominal diameter of the fastening bolt. The parameter settings of the thickened end 7 can effectively improve the shear strength of its connection. The thickening treatment can increase the thread depth of the threaded hole 5 and avoid thread peeling failure caused by local pressure. During implementation, the bolt hole 3 of the bracket 2 is an oblong hole, and the length of the hole extends along the left and right direction of the crossbeam 4. The setting of the oblong hole can improve the tolerance of on-site assembly and also adapt to the installation errors of the existing building.

[0031] In implementation, a shear key 8 is provided on one side of each set of corbels 2. In this embodiment, the left end of the shear key 8 is welded to the column 1, and a protrusion is provided on the upper part of the shear key 8. The two sides of the thickened end 7 are milled with receiving grooves 9 that cooperate with the shear key 8. By setting the shear key 8, the corbel 2 can be thickened, thereby improving its shear resistance. The protrusion can cooperate well with the receiving groove 9 to play a positioning role, while also improving its shear resistance and connection strength. Moreover, the receiving groove 9 is located at the end of the thickened end 7 and will not affect the shear strength on the side where the fastening bolt 6 is located.

[0032] In practice, a reinforcing sleeve 10 is connected to the thickened end 7 by an interference fit; wherein, the reinforcing sleeve 10 corresponds to the bolt hole 3; the threaded hole 5 is opened on the inner side of the reinforcing sleeve 10; by setting the reinforcing sleeve 10, the point fit between the thickened end 7 and the threaded hole 5 is transformed into a curved surface fit, thus avoiding cracking of the thickened end under stress.

[0033] Implementation principle and working principle:

[0034] In this scheme, the bracket 2 is first installed on the column 1 by integral molding or welding. Then, the column 1 with bracket 2 and the crossbeam 4 are transported to the construction site for assembly. During the actual assembly, the bolt holes 3 and threaded holes 5 are aligned, and the fastening bolts 6 are passed through the bolt holes 3 and fastened to the threaded holes 5 by threaded connection. The end of the crossbeam 4 that connects to the bracket 2 is a thickened end 7, which can effectively improve its connection strength and provide sufficient length for the threaded holes 5 to ensure connection stability. More importantly, using bolt fastening instead of on-site welding is more conducive to ensuring connection quality and has a higher safety factor.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims.

Claims

1. A connection structure between steel columns and steel beams for adding elevators to a building, comprising vertically arranged columns (1), characterized in that: The column (1) is laterally fixed with at least one set of brackets (2); each set of brackets (2) is provided with several corresponding bolt holes (3); each set of brackets (2) consists of two pieces arranged opposite to each other, and a crossbeam (4) is provided between each set of brackets (2); a threaded hole (5) corresponding to the bolt hole (3) is provided on the crossbeam (4), and a fastening bolt (6) is provided on the bracket (2), the fastening bolt (6) passes through the bolt hole (3) and engages with the threaded hole (5); the end of the crossbeam (4) connected to the bracket (2) is a thickened end (7).

2. The connection node structure for adding elevator steel columns and steel beams to a building according to claim 1, characterized in that: There are two sets of bolt holes (3), with two bolt holes (3) in each set. The bolt holes (3) are evenly distributed on the bracket (2).

3. The connection node structure for adding elevator steel columns and steel beams to a building according to claim 1, characterized in that: The corbel (2) is welded or integrally formed on the column (1); and the planar projection length of the corbel (2) is greater than the width of the thickened end (7) of the beam (4).

4. The connection node structure for adding elevator steel columns and steel beams to a building according to claim 1, characterized in that: The thickness of the thickened end (7) of the crossbeam (4) is 1.2 to 1.5 times the thickness of the crossbeam (4) at other locations, and the depth of the threaded hole (5) is not less than 1.2 times the nominal diameter of the fastening bolt.

5. The connection node structure for adding elevator steel columns and steel beams to a building according to claim 1, characterized in that: The bolt holes (3) of the bracket (2) are oblong holes, and the length of the holes extends along the axis of the crossbeam (4).

6. The connection node structure for adding elevator steel columns and steel beams to a building according to claim 1, characterized in that: Shear-resistant key (8) is provided on the opposite side of each group of cow legs (2); receiving grooves (9) that cooperate with the shear-resistant key (8) are provided on both sides of the thickened end (7).

7. The connection node structure for adding elevator steel columns and steel beams to a building according to claim 1, characterized in that: A reinforcing sleeve (10) is also provided at the thickened end (7); the reinforcing sleeve (10) corresponds to the bolt hole (3); the threaded hole (5) is provided on the inner side of the reinforcing sleeve (10).

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