Mortise and tenon joint type concrete filled steel tube composite column section assembly connection node

Abstract

The utility model discloses a mortise and tenon type concrete filled steel tube composite column section assembly connection node, which is characterized in that during site construction, a tenon section and a mortise section are poured in advance, so that welding work required to be performed on a construction site is completely avoided, pollution caused by wet work such as concrete pouring or grouting materials on site is solved, and the construction efficiency is improved. And the construction method has the advantages of convenience in construction, high construction efficiency, no need of waiting for concrete hardening and the like. The joint comprises a tenon section and a mortise section, the tenon section comprises an upper column section steel end plate, an inner steel side plate and an upper column section steel tenon, and the assembly connection joint has a reliable and effective force transmission mechanism; by means of the structure, it can be guaranteed that the shearing force and the axial force of the assembly connection joint area between the concrete filled steel tube composite column sections can be completely transmitted, and the joint has enough axial rigidity and lateral rigidity.

Description

Technical Field

[0001] The utility model relates to the field of engineering structures, in particular to a mortise and tenon type steel tube concrete superimposed column segment assembly connection node. Background Art

[0002] The steel tube concrete composite column is a composite structural member formed by tying steel bars around the inner steel tube concrete and pouring the outer layer of concrete. During the construction process, the steel tube concrete composite column often uses the inner steel tube concrete as the construction skeleton to bear the construction load transmitted from the beam and slab, and can also construct the outer reinforced concrete, so it has the advantages of fast construction speed. At the same time, compared with reinforced concrete columns, due to the presence of inner steel tube concrete, the strong constraint of the inner steel tube on the core concrete makes the composite column have higher strength and better seismic performance; compared with steel tube concrete columns, due to the presence of outer reinforced concrete, the composite column has very superior durability and fire resistance.

[0003] Prefabricated buildings are buildings assembled on site from prefabricated parts. They transfer a large amount of on-site work in traditional construction methods to factories. Building components and accessories are processed and manufactured in factories, transported to the construction site, and assembled and installed on site through reliable connection methods. Compared with traditional cast-in-place construction methods, prefabricated buildings have the advantages of stable quality, shortened construction period, environmental protection and energy saving. The country attaches great importance to the development of prefabricated buildings. The "Several Opinions of the CPC Central Committee and the State Council on Further Strengthening Urban Planning and Construction Management" proposed: It is necessary to develop new construction methods, vigorously promote prefabricated buildings, and strive to use about 10 years to make the proportion of prefabricated buildings in the newly built construction area reach 30%.

[0004] Prefabricated steel tube concrete composite columns are also a trend in the development of building industrialization. However, the assembly connection between steel tube concrete composite column segments is very difficult because the composite column components are numerous and complex, including inner steel tubes, core concrete, longitudinal reinforcement, outer concrete, etc. If the post-wetting operation method is used for the connection nodes at the construction site, there are defects such as long construction period and large pouring pollution. Therefore, it is very challenging to achieve reliable connection between composite column segments, meet the effective transmission of internal forces (axial force, bending moment and shear force) of each component, and make the nodes have sufficient strength and rigidity while avoiding wet operations on site. Summary of the invention

[0005] In view of this, the purpose of the utility model is to provide a mortise and tenon type steel tube concrete composite column segment assembly connection node.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the utility model is:

[0007] A mortise and tenon type steel tube concrete composite column segment assembly connection node comprises a tenon segment and a tenon groove segment, the tenon segment comprises an upper column segment steel end plate, an inner steel side plate and an upper column segment steel tenon, the upper column segment steel end plate is provided with an inner steel side plate and an upper column segment steel tenon, and the upper column segment steel tenon is arranged in the inner steel side plate, a first gap is formed between the upper column segment steel tenon and the inner steel side plate, and the upper column segment steel end plate has a first bearing surface on the periphery of the inner steel side plate; the tenon groove segment comprises a lower column segment steel end plate, an outer steel side plate and a lower column segment steel tenon groove, and the lower column segment An outer steel side plate and a lower column section steel tenon groove are provided on the steel end plate, and the lower column section steel tenon groove is arranged in the outer steel side plate, a second gap is formed between the lower column section steel tenon groove and the outer steel side plate, a third gap is also provided in the lower column section steel tenon groove, and the upper surface of the outer steel side plate has a second receiving surface; the first gap is adapted to the structure of the lower column section steel tenon groove, the second gap is adapted to the structure of the inner steel side plate, the third gap is adapted to the structure of the upper column section steel tenon, the first receiving surface is adapted to the second receiving surface, and is used to splice the tenon section with the tenon groove section.

[0008] In some embodiments, the inner steel side plate is provided with multiple first connection holes that pass through the inner steel side plate; the outer steel side plate is provided with multiple second connection holes that pass through the outer steel side plate; when the tenon section and the tenon groove section are spliced, a first connection hole is coaxial with a second connection hole.

[0009] In some embodiments, a plurality of third connection holes penetrating the steel tenon groove of the lower column section are also provided on the side walls of the steel tenon groove of the lower column section; when the tenon section and the tenon groove section are assembled, a first connection hole, a second connection hole and a third connection hole are coaxial.

[0010] In some embodiments, it also includes a single-sided bolt, and the number of the single-sided bolts corresponds one-to-one to the number of the first connecting holes; when the tenon section and the tenon groove section are assembled, a single-sided bolt passes through the first connecting hole, the second connecting hole and the third connecting hole in sequence for locking.

[0011] In some embodiments, the radial cross-section of the upper column section steel groove is cross-shaped, the radial cross-section of the inner steel side plate is a rectangular ring, and the radial cross-section of the outer steel side plate is a rectangular ring; the radial cross-sections of the upper column section steel end plate and the lower column section steel end plate are both rectangular.

[0012] In some embodiments, a rubber gasket is also included, and the rubber gasket is arranged on the connection surface that contacts the tenon section when the tenon section is assembled.

[0013] In some embodiments, the tenon section also includes an upper column section inner steel pipe, which is arranged on a side of the upper column section steel end plate away from the inner steel side plate, the upper column section core concrete is cast in the upper column section inner steel pipe, and the upper column section outer concrete is cast on the outer side of the upper column section inner steel pipe; the tenon section also includes a lower column section inner steel pipe, which is arranged on a side of the lower column section steel end plate away from the outer steel side plate, the lower column section core concrete is cast in the lower column section inner steel pipe, and the lower column section outer concrete is cast on the outer side of the lower column section inner steel pipe.

[0014] In some embodiments, the tenon section also includes an upper column section longitudinal rib, which is arranged on the periphery of the steel pipe in the upper column section and distributed along the circumference of the steel pipe in the upper column section; the mortise section also includes a lower column section longitudinal rib, which is arranged on the periphery of the steel pipe in the lower column section and distributed along the circumference of the steel pipe in the lower column section.

[0015] In some embodiments, the tenon section also includes a plurality of upper column section hoops, which are distributed in an array around the periphery of the upper column section longitudinal reinforcement along the extension direction of the steel pipe in the upper column section; the mortise section also includes a plurality of lower column section hoops, which are distributed in an array around the periphery of the lower column section longitudinal reinforcement along the extension direction of the steel pipe in the lower column section.

[0016] By adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0017] Provided is a mortise and tenon type steel tube concrete composite column segment assembly connection node, comprising a tenon segment and a tenon groove segment, the tenon segment comprising an upper column segment steel end plate, an inner steel side plate and an upper column segment steel tenon, the upper column segment steel end plate is provided with an inner steel side plate and an upper column segment steel tenon, and the upper column segment steel tenon is arranged in the inner steel side plate, a first gap is formed between the upper column segment steel tenon and the inner steel side plate, the upper column segment steel end plate has a first bearing surface on the periphery of the inner steel side plate; the tenon groove segment comprises a lower column segment steel end plate, an outer steel side plate and a lower column segment steel tenon groove, the lower column segment steel end plate The segment steel end plate is provided with an outer steel side plate and a lower column segment steel tenon groove, and the lower column segment steel tenon groove is arranged in the outer steel side plate, a second gap is formed between the lower column segment steel tenon groove and the outer steel side plate, and a third gap is also arranged in the lower column segment steel tenon groove, and the upper surface of the outer steel side plate has a second receiving surface; the first gap is adapted to the structure of the lower column segment steel tenon groove, the second gap is adapted to the structure of the inner steel side plate, the third gap is adapted to the structure of the upper column segment steel tenon, and the first receiving surface is adapted to the second receiving surface, which is used to make the tenon segment and the tenon groove segment fit together. During on-site construction, the tenon segment and the tenon groove segment have been cast in advance, which completely avoids the welding work required at the construction site, solves the pollution caused by wet operations such as on-site pouring of concrete or grouting materials, and only needs to be simply hoisted and assembled at the construction site, which has the advantages of convenient construction, high construction efficiency, and no need to wait for concrete hardening. Secondly, the assembly connection node has a reliable and effective force transmission mechanism: the concrete axial force of the upper column section is completely transmitted to the steel end plate of the upper column section, and the longitudinal reinforcement of the upper column section and the steel pipe in the upper column section transmit the axial force by welding with the steel end plate of the upper column section. The axial force on the steel end plate of the upper column section is transmitted to the steel tenon of the upper column section, and then to the steel tenon groove of the lower column section. The steel tenon groove of the lower column section is welded with the steel end plate of the lower column section, and the axial force is completely transmitted to the end steel plate of the lower column section, and then the axial force is transmitted to the concrete of the lower column section, the longitudinal reinforcement of the lower column section and the steel pipe in the lower column section. The shear force of the assembly connection node is effectively transmitted through the steel tenon of the upper column section and the steel tenon groove of the lower column section. The plug-in connection structure of the steel tenon of the upper column section and the steel tenon groove of the lower column section can ensure that the shear strength and stiffness of the node are not lost, and the inner steel side plate and the outer steel side plate are used to further ensure the effective transmission of the shear force. Through the above structure, it can be ensured that the shear force and axial force of the assembly connection node area between the steel tube concrete superimposed column sections can be fully transmitted, and the node has sufficient axial and lateral stiffness. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall cross section;

[0020] Figure 2 It is a schematic diagram of the tenon section;

[0021] Figure 3 It is a schematic diagram of the mortise and tenon section;

[0022] Figure 4 It is a first schematic diagram of the connection part;

[0023] Figure 5 This is a second schematic diagram of the connection site.

[0024] Explanation of the accompanying numbers: 1. longitudinal reinforcement of the upper column section; 2. stirrups of the upper column section; 3. outer concrete of the upper column section; 4. inner steel pipe of the upper column section; 5. core concrete of the upper column section; 6. steel end plate of the upper column section; 7. steel tenon of the upper column section; 8. rubber gasket; 9. steel tenon groove of the lower column section; 10. single-sided bolt; 11. outer steel side plate; 12. inner steel side plate; 13. steel end plate of the lower column section; 14. longitudinal reinforcement of the lower column section; 15. stirrups of the lower column section; 16. outer concrete of the lower column section; 17. inner steel pipe of the lower column section; 18. core concrete of the lower column section; 19. first bearing surface; 20. second bearing surface; 21. first connecting hole; 22. second connecting hole; 23. third connecting hole; 24. first gap; 25. second gap; 26. third gap. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is particularly noted that the following embodiments are only used to illustrate the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only partial embodiments of the present invention rather than all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figures 1 to 5The present embodiment provides a mortise and tenon type steel tube concrete composite column segment assembly connection node, including a tenon segment and a tenon groove segment, the tenon segment includes an upper column segment steel end plate 6, an inner steel side plate 12 and an upper column segment steel tenon 7, the upper column segment steel end plate 6 is provided with an inner steel side plate 12 and an upper column segment steel tenon 7, and the upper column segment steel tenon 7 is arranged in the inner steel side plate 12, a first gap 24 is formed between the upper column segment steel tenon and the inner steel side plate 12, the upper column segment steel end plate 6 has a first receiving surface 19 on the periphery of the inner steel side plate 12; the tenon groove segment includes a lower column segment steel end plate 13, an outer steel side plate 11 and a lower column segment steel tenon groove 9, the lower column segment steel An outer steel side plate 11 and a lower column section steel tenon groove 9 are provided on the end plate 13, and the lower column section steel tenon groove 9 is arranged in the outer steel side plate 11, a second gap 25 is formed between the lower column section steel tenon groove 9 and the outer steel side plate 11, a third gap 26 is also provided in the lower column section steel tenon groove 9, and the upper surface of the outer steel side plate 11 has a second receiving surface 20; the first gap 24 is adapted to the structure of the lower column section steel tenon groove 9, the second gap 25 is adapted to the structure of the inner steel side plate 12, the third gap 26 is adapted to the structure of the upper column section steel tenon 7, the first receiving surface 19 is adapted to the second receiving surface 20, and is used to splice the tenon section with the tenon groove section.

[0027] In this embodiment, the composite column section can be understood as a plurality of column section structures for being stacked, and the composite column described below is also referred to as the composite column section. The tenon section can be understood as a tenon structure provided at one end of the composite column, and the tenon groove section can be understood as a tenon groove structure provided at the other end of the same composite column. When multiple composite columns are spliced, the tenon section of the first composite column is spliced ​​with the tenon groove section of the second composite column to realize the stacking operation of the composite columns.

[0028] Furthermore, the steel end plates, outer steel side plates 11, inner steel side plates 12, steel tenons and steel tenon grooves are manufactured in the factory in priority, and are distinguished according to the positions when they are superimposed on the composite columns, and the steel end plates are divided into upper column section steel end plates 6 and lower column section steel end plates 13, the steel tenons are recorded as upper column section steel tenons 7, and the steel tenon grooves are recorded as lower column section steel tenon grooves 9. Among them, the upper column section steel end plate 6 and the inner steel side plates 12 and the upper column section steel tenon 7 can be fixed by welding, and the lower column section steel end plate 13 and the outer steel side plates 11 and the lower column section steel tenon can be fixed by welding.

[0029] like Figure 2 and Figure 3 As shown, in some embodiments, the radial cross-section of the upper column section steel mortise is cross-shaped, the radial cross-section of the inner steel side plate 12 is a rectangular ring, and the radial cross-section of the outer steel side plate 11 is a rectangular ring; the radial cross-sections of the upper column section steel end plate 6 and the lower column section steel end plate 13 are both rectangular. This method can achieve good shear force and axial force transmission, while avoiding the mortise and tenon structure of the entire connection node from being too complicated.

[0030] When in use, the bottom prefabricated composite columns are first installed at the construction site, and then the upper composite columns are installed in sequence according to the mortise and tenon type steel tube concrete composite column segment assembly connection nodes shown in this embodiment until the top column segment is installed.

[0031] That is, when the tenon section and the tenon groove section are assembled in the vertical direction, the first gap 24 is adapted to the structure of the steel tenon groove 9 of the lower column section, the second gap 25 is adapted to the structure of the inner steel side plate 12, and the third gap 26 is adapted to the structure of the steel tenon 7 of the upper column section. At this time, the first supporting surface 19 and the second supporting surface 20 will eventually fit together to form a splicing line of the overlapping column sections.

[0032] In this embodiment, the upper and lower column sections of the steel tube concrete composite column are connected by mortise and tenon insertion, and no wet work such as concrete pouring is required at the construction site. The mortise and tenon structure can be used to achieve assembly connection, which is convenient for construction. At the same time, the steel mortise and tenon provide sufficient node shear stiffness to ensure that the shear force and axial force in the node area can be fully transmitted. The structure is stable and reliable, with sufficient strength and stiffness, ensuring the safety of the overall structural system.

[0033] See also Figures 2 to 4 In some embodiments, the inner steel side plate 12 is provided with a plurality of first connection holes 21 penetrating the inner steel side plate 12; the outer steel side plate 11 is provided with a plurality of second connection holes 22 penetrating the outer steel side plate 11; when the tenon section and the tenon groove section are spliced, a first connection hole 21 is coaxial with a second connection hole 22.

[0034] In this embodiment, connecting holes are respectively provided on the outer steel side plate 11 and the inner steel side plate 12. For the convenience of distinction, the connecting hole on the inner steel side plate 12 is recorded as the first connecting hole 21, and the connecting hole on the outer steel side plate 11 is recorded as the second connecting hole 22. The first connecting hole 21 and the second connecting hole 22 can correspond to each other when the tenon section and the tenon groove section are assembled together, that is, a first connecting hole 21 and a second connecting hole 22 are coaxial for fasteners to pass through.

[0035] Furthermore, in some embodiments, a plurality of third connection holes 23 penetrating the lower column section steel tenon groove 9 are further provided on the side wall thereof; when the tenon section and the tenon groove section are assembled, a first connection hole 21, a second connection hole 22 and a third connection hole 23 are coaxial. The third connection hole 23 is used to provide deformation space when the single-sided bolt 10 is tightened.

[0036] See also Figure 4 In some embodiments, it also includes a single-sided bolt 10, and the number of the single-sided bolts 10 corresponds to the number of the first connecting holes 21; when the tenon section and the tenon groove section are assembled, one single-sided bolt 10 passes through the first connecting hole 21, the second connecting hole 22 and the third connecting hole 23 in sequence for locking.

[0037] It is understandable that only by splicing the tenon section and the tenon groove section, there is a gap at the splicing point, which makes the integrity of the tenon section and the tenon groove section weak. At the same time, since the bolts cannot be tightened in the steel plate in the node area, the tenon groove section and the tenon section are connected by a single-sided bolt 10. The single-sided bolt 10 is passed through the first connecting hole 21, the second connecting hole 22 and the third connecting hole 23 arranged coaxially and tightened, thereby connecting the prefabricated composite column sections into a whole, so as to realize the assembly of the upper and lower prefabricated steel tube concrete composite columns into a whole.

[0038] See also Figure 3 In some embodiments, a rubber gasket 8 is further included, and the rubber gasket 8 is arranged on the connection surface that contacts the tenon section when the tenon section is spliced. This method can provide deformation space for the upper column section and the lower column section when they are longitudinally spliced. At the same time, because the rubber gasket is elastic when the tenon section is connected to the tenon section, it will expand and fill the connection area of ​​the tenon section, preventing other impurities such as rainwater and gravel from falling into the connection area, increasing the connection tightness between the tenon section and the tenon section, and also providing deformation space for tightening the single-sided bolt 10.

[0039] See also Figure 2 and Figure 3 In some embodiments, the tenon section also includes an upper column section inner steel pipe 4, which is arranged on a side of the upper column section steel end plate 6 away from the inner steel side plate 12, and the upper column section core concrete 5 is cast in the upper column section inner steel pipe 4, and the upper column section outer concrete 3 is cast on the outer side of the upper column section inner steel pipe 4; the tenon section also includes a lower column section inner steel pipe 17, which is arranged on a side of the lower column section steel end plate 13 away from the outer steel side plate 11, and the lower column section core concrete 18 is cast in the lower column section inner steel pipe 17, and the lower column section outer concrete 16 is cast on the outer side of the lower column section inner steel pipe 17.

[0040] See also Figure 2 and Figure 3 In some embodiments, the tenon section also includes an upper column section longitudinal rib 1, which is arranged on the periphery of the steel pipe 4 in the upper column section and distributed along the circumference of the steel pipe 4 in the upper column section; the mortise section also includes a lower column section longitudinal rib 14, which is arranged on the periphery of the steel pipe 17 in the lower column section and distributed along the circumference of the steel pipe 17 in the lower column section.

[0041] See also Figure 2 and Figure 3 In some embodiments, the tenon section further includes a plurality of upper column section stirrups 2, which are arrayed around the periphery of the upper column section longitudinal reinforcement 1 along the extension direction of the steel pipe 4 in the upper column section; the mortise section further includes a plurality of lower column section stirrups 15, which are arrayed around the periphery of the lower column section longitudinal reinforcement 14 along the extension direction of the steel pipe 17 in the lower column section.

[0042] In the above embodiment, the upper column section and the lower column section of the steel tube concrete composite column are connected by a combination of insertion connection and bolt connection using a mortise and tenon structure, and no wet work such as concrete pouring is required at the construction site. The mortise and tenon structure and the single-sided bolt 10 can be used to achieve assembly connection, which is convenient for construction. At the same time, the steel mortise and tenon and the bolt jointly provide sufficient node shear stiffness to ensure that the shear force and axial force in the node area can be fully transmitted. The structure is stable and reliable, with sufficient strength and stiffness to ensure the safety of the overall structural system.

[0043] The assembled steel tube concrete composite columns are all processed in the factory, including inner steel tubes (i.e., the inner steel tubes 4 of the upper column section and the inner steel tubes 17 of the lower column section), core concrete (i.e., the core concrete 5 of the upper column section and the core concrete 18 of the lower column section), outer concrete (i.e., the outer concrete 3 of the upper column section and the outer concrete 16 of the lower column section), rubber gaskets 8, ordinary longitudinal reinforcements (i.e., the longitudinal reinforcement 1 of the upper column section and the longitudinal reinforcement 14 of the lower column section), stirrups (i.e., the stirrups 2 of the upper column section and the stirrups 15 of the lower column section), steel end plates (i.e., the steel end plates 6 of the upper column section and the steel end plates 13 of the lower column section), steel side plates (i.e., the inner steel side plates 12 and the outer steel side plates 11), steel tenons (i.e., the steel tenons 7 of the upper column section) and steel tenons (i.e., the steel tenons 9 of the lower column section), etc. At the construction site, the bottom prefabricated composite columns are first installed, and then the upper composite columns are installed in sequence according to the mortise and tenon joints of the composite column end plates until the top column section is installed. When assembling the prefabricated composite column section, the upper column section steel tenon 7 of the upper column section steel end plate 6 is inserted into the lower column section steel tenon groove 9 of the lower column section steel end plate 13, and the rubber gasket 8 in the lower column section steel tenon groove 9 is pressed downward to splice the upper and lower prefabricated steel tube concrete composite columns into a whole. Since the bolts cannot be tightened in the steel plate in the node area, a single-sided bolt 10 is used to connect the lower column section steel tenon groove 9 and the upper column section steel tenon 7. The single-sided bolt 10 is passed through the reserved holes (i.e., the first connecting hole 21 and the second connecting hole 22) on the inner steel side plate 12 and the outer steel side plate 11 and tightened, thereby connecting the prefabricated composite column sections into a whole to realize the assembly and internal force transmission of the upper and lower prefabricated steel tube concrete composite columns. Considering that the reliability of the connection nodes between prefabricated steel tube concrete composite column sections is the key to ensuring the safety and reliability of the overall structure, it is not only necessary to have the characteristics of convenient assembly and convenient construction, but also to ensure that there is a mechanism for complete transmission of internal forces between the upper and lower column sections, and at the same time have sufficient shear strength and stiffness.

[0044] Applied to the actual embodiments, the following noun definitions are consistent with the above definitions and are not listed here. The specific embodiments are as follows:

[0045] First embodiment:

[0046] The mortise and tenon steel tube concrete composite column segment assembly connection node is composed of an inner steel tube, core concrete, common longitudinal reinforcement, stirrups, outer concrete, upper and lower steel end plates, steel tenons, steel tenon grooves, rubber gaskets 8, single-sided bolts 10, inner steel side plates 12 and outer steel side plates 11. The prefabricated composite column is transported to the construction site for assembly after being processed in the factory. A steel end plate is set at the end of the column segment, and the steel tube and the steel end plate are welded and fixed to ensure that the internal force of the steel tube concrete can be effectively transmitted to the steel end plate. Holes are pre-opened in the middle of the inner steel side plate 12, the outer steel side plate 11 and the outer side of the tenon groove, and a rubber ring is arranged inside the tenon groove segment end plate to provide space for the longitudinal deformation of the upper and lower column segments.

[0047] Furthermore, the steel pipe may be made of materials such as stainless steel, alloy and low carbon steel.

[0048] Furthermore, the cross-sectional form of the steel tube concrete composite column can be circle within circle or square within square.

[0049] Furthermore, the concrete may be ordinary concrete, ultra-high performance concrete, recycled concrete, etc.

[0050] And, it also includes a method for manufacturing a mortise and tenon type steel tube concrete composite column segment assembly connection node, comprising the following steps:

[0051] (1) Fabricate prefabricated steel tube concrete composite column sections in the factory. First, the steel end plates, outer steel side plates 11, inner steel side plates 12, steel tenons and steel tenons are processed according to the design dimensions, and holes are opened on the four sides of the outer steel side plates 11, inner steel side plates 12 and tenons according to the pre-designed parts to provide space for the single-sided bolts 10 to pass through and be tightened. First, the outer wall of the steel tube is welded to the steel end plate, and then the core concrete is poured. After seven days of curing, the longitudinal reinforcement, stirrups and upper steel end plate are welded. Make the outer concrete formwork, complete the outer concrete pouring work, and then cure at room temperature to form. Finally, place the rubber gasket 8 in the steel tenon, and weld the steel tenon and the inner steel side plate 12 of the steel end plate of the upper column section, and weld the steel tenon and the outer steel end plate of the steel end plate of the lower column section.

[0052] (2) The prefabricated assembled steel tube concrete composite column segment specimens are transported to the construction site for installation. During the assembly of the upper and lower column segments, the lower column end is installed first, and then the upper column segment is hoisted, and the tenon of the upper column segment is aligned with the tenon groove of the lower column segment and inserted into the connection.

[0053] (3) Finally, the single-side bolt 10 is passed through the reserved hole of the steel side plate and tightened with a torque wrench to reliably connect the upper and lower column sections through the inner steel side plate 12 and the outer steel side plate 11, thereby providing sufficient shear stiffness for the prefabricated steel tube concrete composite column.

[0054] Compared with the existing construction technology, the above embodiment has the following advantages: First, it completely avoids the welding work required at the construction site, completely solves the pollution caused by wet operations such as pouring concrete or grouting materials on site, and only needs simple lifting and assembly at the construction site, which has the advantages of convenient construction, high construction efficiency, and no need to wait for concrete hardening. Secondly, the connection node between the assembled column sections has a reliable and effective force transmission mechanism: the axial force of the upper column section concrete is completely transmitted to the steel end plate, and the longitudinal reinforcement and the inner steel pipe transmit the axial force by welding with the steel end plate. The axial force on the steel end plate 6 of the upper column section is transmitted to the steel tenon, and then transmitted to the steel tenon groove through the rubber gasket 8. The steel tenon groove is welded to the steel end plate 13 of the lower column section, and the axial force is completely transmitted to the end steel plate of the lower column section, and then the axial force is transmitted to the concrete, longitudinal reinforcement and inner steel pipe of the lower column section. The shear force of the assembled node is effectively transmitted through the steel tenon and steel tenon groove. The plug-in connection structure of the steel tenon and steel tenon groove can ensure that the shear strength and stiffness of the node are not lost, and the single-sided bolt 10 is used to tighten the inner and outer steel side plates 11 to further ensure the effective transmission of the shear force. Through the above structure, it can be ensured that the shear force and axial force of the assembled node area between the steel tube concrete composite column sections can be fully transmitted, and the node has sufficient axial and lateral stiffness.

[0055] In this way, the steel tube concrete composite column sections are connected as a whole through a combination of the mortise and tenon structure connection of the composite column steel end plate, the welding connection between the inner steel pipe and the end plate, and the welding connection between the end plate and the mortise and tenon, and the inner and outer steel side plates of the upper and lower column sections are fastened by single-sided bolts 10, further optimizing the connection structure, realizing complete transfer of loads between column sections, and ensuring that the assembly is equivalent to the effect of cast-in-place.

[0056] Second embodiment:

[0057] The specific construction method of the mortise and tenon type steel tube concrete composite column segment prefabricated connection node is as follows: In the prefabrication plant, the inner steel tube, longitudinal reinforcement, stirrups, steel end plate, inner steel side plate 12, outer steel side plate 11, steel tenon, steel tenon groove and other components of the steel tube concrete composite column segment are first processed. First, the upper column segment inner steel tube 4 and the upper column segment steel end plate 6 are processed, and then the inner steel side plate 12, the outer steel side plate 11 and the lower column segment steel tenon groove 9 and the surrounding positions are processed to reserve bolt holes for the single-sided bolt 10 to tighten, and the rubber gasket 8 is placed in the lower column segment steel tenon groove 9. Weld the steel pipe 4 inside the upper column section to the upper steel end plate, pour the core concrete 5 of the upper column section after welding, weld the steel end plate on the other side after curing, and complete the welding and binding of the peripheral longitudinal reinforcement and stirrups according to the designed spacing, then support the formwork and pour the peripheral concrete, weld the steel tenon 7 of the upper column section, the inner steel side plate 12 with the steel end plate 6 of the upper column section, and weld the steel tenon groove 9 of the lower column section, the outer steel side plate 11 with the steel end plate 13 of the lower column section. The pouring of the upper column section and the lower column section is completed in the same process. After the maintenance is completed, the prefabricated composite column section is transported to the construction site. After the installation of the bottom lower column section is completed, the upper column section steel tenon 7 and the pre-installed lower column section steel tenon groove 9 are aligned and assembled by hoisting. The single-sided bolt 10 is passed through the bolt hole reserved on the steel end plate and tightened to fasten the inner steel side plate 12 and the outer steel side plate 11. In this way, the prefabricated composite column sections are connected into a whole, so that the prefabricated steel tube concrete composite column has good integrity and great lateral stiffness, that is, all the production and construction procedures of the inner prefabricated steel tube concrete composite column section are completed.

[0058] Furthermore, a construction method for a prefabricated steel tube concrete composite column segment connection node comprises the following steps:

[0059] 1. Process the prefabricated steel tube concrete composite column in the prefabrication factory, and process the inner steel tube, stirrups, longitudinal reinforcement, steel end plate, steel mortise, steel tenon, outer steel side plate 11, and inner steel side plate 12 according to the designed size. Weld and fix the outer wall of the inner steel tube to the bottom steel end plate.

[0060] 2. Pour core concrete in the steel pipe, and weld a steel end plate to the other end of the inner steel pipe after curing. Weld steel side plates, steel mortises and steel tenons on the steel end plates, and arrange rubber washers in the steel mortises to tighten the connection between the steel tenons and the steel mortises and to slightly adjust the position of the column section to ensure that the single-sided bolt 10 can smoothly enter the bolt hole. At the same time, holes are opened on the surface of the inner and outer steel side plates 11 and the steel mortises according to the design drawings. The radius of the steel mortises is slightly larger than the radius of the inner and outer steel side plates 11, so that after the installation of the steel tube concrete composite column is completed, the single-sided bolt 10 can pass through the bolt holes on the inner and outer steel side plates 11 and be tightened.

[0061] 3. Tie longitudinal reinforcement and stirrups around the steel tube, bend the ends of the longitudinal reinforcement of the prefabricated steel tube concrete composite column and weld them to the steel end plate to ensure that the anchorage length meets the design specification requirements. Then, make the composite column formwork and pour the outer concrete in the formwork.

[0062] 4. After the curing period, the processed prefabricated steel tube concrete composite columns are transported to the construction site, where they are aligned and hoisted. First, install the bottom prefabricated composite columns, and then install the upper composite columns in sequence according to the steel tenon groove and steel tenon interface until the top column section is installed. During assembly construction, insert the steel tenon 7 of the upper column section into the steel tenon groove 9 of the lower column section, and squeeze the rubber gasket 8 in the tenon groove downward to make the two tightly connected. Then, pass the single-sided bolt 10 through the reserved holes on the inner and outer steel side plates 11, and extend it into the bolt hole on the outer surface of the steel tenon groove, and tighten the bolt with a torque wrench to achieve a reliable connection between the inner steel plate of the upper column section and the outer steel plate of the lower column section, thereby connecting the upper and lower composite column sections into a whole, and completing the on-site assembly construction of the prefabricated steel tube concrete composite column.

[0063] The above embodiment provides a mortise and tenon type steel tube concrete composite column segment assembly connection node, including a tenon segment and a tenon groove segment, the tenon segment includes an upper column segment steel end plate 6, an inner steel side plate 12 and an upper column segment steel tenon 7, the upper column segment steel end plate 6 is provided with an inner steel side plate 12 and an upper column segment steel tenon 7, and the upper column segment steel tenon 7 is arranged in the inner steel side plate 12, a first gap 24 is formed between the upper column segment steel tenon and the inner steel side plate 12, and the upper column segment steel end plate 6 has a first receiving surface 19 on the periphery of the inner steel side plate 12; the tenon groove segment includes a lower column segment steel end plate 13, an outer steel side plate 11 and a lower column segment steel tenon groove 9, and the lower column segment steel An outer steel side plate 11 and a lower column section steel tenon groove 9 are provided on the end plate 13, and the lower column section steel tenon groove 9 is arranged in the outer steel side plate 11, a second gap 25 is formed between the lower column section steel tenon groove 9 and the outer steel side plate 11, a third gap 26 is also provided in the lower column section steel tenon groove 9, and the upper surface of the outer steel side plate 11 has a second receiving surface 20; the first gap 24 is adapted to the structure of the lower column section steel tenon groove 9, the second gap 25 is adapted to the structure of the inner steel side plate 12, the third gap 26 is adapted to the structure of the upper column section steel tenon 7, the first receiving surface 19 is adapted to the second receiving surface 20, and is used to splice the tenon section with the tenon groove section. During on-site construction, the tenon section and the tenon groove section have been cast in advance, completely avoiding the welding work required at the construction site, solving the pollution caused by wet operations such as on-site pouring of concrete or grouting materials, and only simple lifting and assembly are required at the construction site, which has the advantages of convenient construction, high construction efficiency, and no need to wait for concrete hardening. Secondly, the assembly connection node has a reliable and effective force transmission mechanism: the concrete axial force of the upper column section is completely transmitted to the upper column section steel end plate 6, and the upper column section longitudinal reinforcement 1 and the upper column section inner steel pipe 4 transmit the axial force through welding with the upper column section steel end plate 6. The axial force on the upper column section steel end plate 6 is transmitted to the upper column section steel tenon 7, and then to the lower column section steel tenon groove 9. The lower column section steel tenon groove 9 is welded with the lower column section steel end plate 13, and the axial force is completely transmitted to the lower column section steel end plate 13, and then the axial force is transmitted to the concrete of the lower column section, the lower column section longitudinal reinforcement 14 and the lower column section inner steel pipe 17. The shear force of the assembly connection node is effectively transmitted through the upper column section steel tenon 7 and the lower column section steel tenon groove 9. The insertion connection structure of the upper column section steel tenon 7 and the lower column section steel tenon groove 9 can ensure that the shear strength and rigidity of the node are not lost, and the inner steel side plate 12 and the outer steel side plate 11 further ensure the effective transmission of the shear force. Through the above structure, it can be ensured that the shear force and axial force of the assembly connection node area between the steel tube concrete composite column sections can be fully transmitted, and the node has sufficient axial and lateral rigidity.

[0064] The above descriptions are only some embodiments of the present invention, and do not limit the protection scope of the present invention. Any equivalent device or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A mortise and tenon type steel tube concrete composite column segment assembly connection node, characterized in that: include: The tenon section comprises an upper column section steel end plate, an inner steel side plate and an upper column section steel tenon, wherein the upper column section steel end plate is provided with the inner steel side plate and the upper column section steel tenon, and the upper column section steel tenon is arranged in the inner steel side plate, a first gap is formed between the upper column section steel tenon and the inner steel side plate, and the upper column section steel end plate has a first receiving surface on the periphery of the inner steel side plate; The mortise and tenon section comprises a lower column section steel end plate, an outer steel side plate and a lower column section steel mortise and tenon, the lower column section steel end plate is provided with the outer steel side plate and the lower column section steel mortise and tenon, and the lower column section steel mortise and tenon is arranged in the outer steel side plate, a second gap is formed between the lower column section steel mortise and tenon and the outer steel side plate, a third gap is further arranged in the lower column section steel mortise and tenon, and the upper surface of the outer steel side plate has a second receiving surface; The first gap is adapted to the structure of the steel tenon groove of the lower column section, the second gap is adapted to the structure of the inner steel side plate, the third gap is adapted to the structure of the steel tenon of the upper column section, and the first supporting surface is adapted to the second supporting surface, so as to enable the tenon section to be spliced ​​with the tenon groove section.

2. The mortise and tenon type steel tube concrete composite column segment assembly connection node according to claim 1 is characterized in that: The inner steel side plate is provided with a plurality of first connection holes penetrating the inner steel side plate; The outer steel side plate is provided with a plurality of second connection holes penetrating the outer steel side plate; When the tenon section and the tenon groove section are assembled, one of the first connecting holes is coaxial with one of the second connecting holes.

3. The mortise and tenon type steel tube concrete composite column segment assembly connection node according to claim 2 is characterized in that: The side wall of the steel tenon groove of the lower column section is also provided with a plurality of third connection holes penetrating the steel tenon groove of the lower column section; When the tenon section and the tenon groove section are assembled, one of the first connecting holes, one of the second connecting holes and one of the third connecting holes are coaxial.

4. The mortise and tenon type steel tube concrete composite column segment assembly connection node according to claim 3 is characterized in that: Also includes: Single-sided bolts, the number of which corresponds to the number of the first connecting holes; When the tenon section and the tenon groove section are assembled, one of the single-sided bolts passes through the first connecting hole, the second connecting hole and the third connecting hole in sequence for locking.

5. The mortise and tenon type steel tube concrete composite column segment assembly connection node according to claim 4 is characterized in that: The radial cross section of the upper column section steel mortise is a cross, the radial cross section of the inner steel side plate is a rectangular ring, and the radial cross section of the outer steel side plate is a rectangular ring; The radial cross-sections of the upper column section steel end plate and the lower column section steel end plate are both rectangular.

6. The mortise and tenon type steel tube concrete composite column segment assembly connection node according to claim 5 is characterized in that: Also includes: A rubber gasket is arranged on the connection surface that contacts the tenon section when the tenon section is assembled.

7. The mortise and tenon type steel tube concrete composite column segment assembly connection node according to claim 6 is characterized in that: The tenon section also includes: The upper column section inner steel pipe is arranged on a side of the upper column section steel end plate away from the inner steel side plate, the upper column section core concrete is poured inside the upper column section inner steel pipe, and the upper column section outer concrete is poured outside the upper column section inner steel pipe; The tongue and groove section also includes: The lower column section inner steel pipe is arranged on a side of the lower column section steel end plate away from the outer steel side plate. The lower column section core concrete is poured inside the lower column section inner steel pipe, and the lower column section outer concrete is poured outside the lower column section inner steel pipe.

8. The mortise and tenon type steel tube concrete composite column segment assembly connection node according to claim 7 is characterized in that: The tenon section also includes: The upper column segment longitudinal reinforcement is arranged on the periphery of the steel pipe in the upper column segment and distributed along the circumference of the steel pipe in the upper column segment; The tongue and groove section also includes: The lower column segment longitudinal reinforcement is arranged on the periphery of the steel pipe in the lower column segment and distributed along the circumference of the steel pipe in the lower column segment.

9. The mortise and tenon type steel tube concrete composite column segment assembly connection node according to claim 8, characterized in that: The tenon section also includes: A plurality of upper column segment stirrups are arranged in an array on the periphery of the upper column segment longitudinal reinforcement along the extension direction of the steel pipe in the upper column segment; The tongue and groove section also includes: A plurality of lower column segment stirrups are distributed in an array on the periphery of the lower column segment longitudinal reinforcement along the extension direction of the steel pipe in the lower column segment.

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