Connection nodes between steel-concrete beam and concrete-filled steel tube column

Abstract

The present invention relates to a connection node between a steel-concrete beam and a steel tube concrete column, which can solve the problems of stress concentration and poor reliability caused by the small connection area of ​​the connection node between the steel-concrete beam and the steel tube concrete column in the prior art. The connection node between the steel-concrete beam and the steel tube concrete column comprises: a steel tube concrete column; a steel-concrete beam; a transition piece, which is arranged between the steel tube concrete column and the steel-concrete beam and is respectively connected to the steel tube in the steel tube concrete column and the steel in the steel-concrete beam; the transition piece comprises a first end connected to the end face of the steel in the steel-concrete beam and a second end connected to the side face of the steel tube in the steel tube concrete column; the cross-sectional area of ​​the second end of the transition piece is larger than the cross-sectional area of ​​the first end, and the cross-sectional area of ​​the first end is not less than the area of ​​the end face of the steel in the steel-concrete beam.

Description

Technical Field

[0001] The invention relates to a connection node between a steel-concrete beam and a steel tube concrete column. Background Art

[0002] In recent years, with the increasing maturity of construction technology, people have introduced a steel tube concrete column composite structure system based on the original reinforced concrete structure system. The steel tube concrete column uses two materials, steel tube and concrete, to make the two mutually constrained in the force process: on the one hand, due to the constraint of the steel tube on the filled concrete, the concrete is in a three-dimensional compression stress state, so that it can give full play to its compressive strength; on the other hand, due to the filling effect of concrete, the ability of the steel tube to resist buckling under the action of axial force is improved. The steel tube concrete column structure can give full play to and utilize the characteristics of steel and concrete materials, achieve complementary advantages in performance, improve the bearing capacity of components while having good plasticity and toughness, and provide a new way for the application of high-strength concrete and high-strength steel; at the same time, the use of steel tube concrete column structure can save a lot of building materials and is convenient for construction, and the economic benefits are also obvious. One of the keys to promote the application of steel tube concrete columns is to solve the connection between steel tube concrete columns and steel bars or steel concrete beams. Due to different connection methods, their performance varies greatly. Therefore, the connection node between steel tube concrete columns and steel bars or steel concrete beams has become a hot topic for technical personnel in this field.

[0003] For example, the patent document with the authorization announcement number CN208792508U and the authorization announcement date of 2019.04.26 discloses a node structure of a steel-framed concrete column and a steel section constrained by a square steel tube, which mainly includes three parts, namely a column, a ring beam surrounding the outer periphery of the column, and a steel section crossing the column and the ring beam. Among them, the column is a steel-framed concrete column constrained by a square steel tube, including a square steel tube, in which the steel frame, the longitudinal reinforcement and the stirrups are arranged inside the square steel tube, and concrete is also poured in the square steel tube to form a steel-concrete structure. The ring beam includes annular longitudinal reinforcement and stirrups inside the ring beam, and concrete is poured to form a steel-concrete structure. When the steel section is fixed to the steel frame inside the column, the upper flange and the lower flange of the steel section are directly welded to the steel frame inside the column by full penetration welds, so as to achieve the fixation of the steel section relative to the column.

[0004] This node structure has the advantages of clear force transmission and easy construction, and is worthy of promotion. However, there are still some structural defects: the connection area between the steel section and the steel frame in the column is the cross-sectional area of ​​the steel section itself. When the steel frame in the column is subjected to the force transmitted by the steel section, the force still acts on the steel frame in the column through the connection area between the steel section and the steel frame in the column. In this way, when the steel section is subjected to a large bending moment or shear force, stress concentration is prone to occur at the connection between the steel section and the steel frame in the column due to the smaller connection area, which may cause deformation of the steel section or the steel frame in the column at the least, or tearing and connection failure at the connection between the steel section and the steel frame in the column at the worst, and the reliability is poor. Summary of the invention

[0005] The object of the present invention is to provide a connection node between a steel concrete beam and a steel tube concrete column, which can solve the problems of stress concentration and poor reliability caused by the small connection area of ​​the connection node between the steel concrete beam and the steel tube concrete column in the prior art.

[0006] To achieve the above purpose, the connection node between the steel concrete beam and the steel tube concrete column in the present invention adopts the following technical solution:

[0007] The connection node between steel concrete beam and steel tube concrete column includes:

[0008] Concrete-filled steel tube columns;

[0009] Steel concrete beam;

[0010] The adapter is arranged between the steel tube concrete column and the steel concrete beam, and is respectively connected to the steel tube in the steel tube concrete column and the steel in the steel concrete beam;

[0011] The adapter includes a first end connected to the end face of the steel in the steel-concrete beam, and a second end connected to the side face of the steel tube in the steel tube concrete column; the cross-sectional area of ​​the second end of the adapter is larger than the cross-sectional area of ​​the first end, and the cross-sectional area of ​​the first end is not less than the area of ​​the end face of the steel in the steel-concrete beam, the steel tube in the steel tube concrete column is a square tube, the cross-section of the adapter is an I-shaped, and has two flanges arranged in parallel in the up and down directions, the width of the two flanges of the adapter widens in the direction from the first end to the second end, the adapter and the steel are connected through the end face, and the cross-sectional area of ​​the first end of the adapter is consistent with the shape of the end face of the steel.

[0012] Its beneficial effects are: the adapter is connected between the steel pipe and the steel section, playing a role in force transmission, and at the same time, the area of ​​the connection between the adapter and the steel section is larger than the area of ​​the connection with the steel pipe. Compared with the prior art, the adapter can transfer the bending moment of the steel-concrete beam to the steel tube concrete column in a more dispersed manner, eliminating the stress concentration at the connection position between the steel-concrete beam and the steel tube concrete column, ensuring that the structure of the steel pipe and the steel section is more reliable when transmitting the force, and the connection between the steel tube concrete column and the steel concrete beam is more stable. The cross-section of the first end of the adapter is consistent with the end face shape of the steel section, and through the end face butt connection, the connection is more reliable, and the force can be better transmitted from the steel section to the adapter. The steel section commonly used in the prior art is I-beam, and the I-shaped adapter can better fit the steel section.

[0013] Furthermore, the adapter also includes a web connected between the two flanges.

[0014] The beneficial effect is that: by using an adapter with an I-shaped cross section, the flange and the web in the adapter can improve the torsional and compressive strength of the adapter.

[0015] Furthermore, the width of the first end of the flange is smaller than the width of the second end of the flange, and the flange has an arc-shaped or inclined transition side edge in the direction from the first end to the second end.

[0016] Its beneficial effect is that the flange has a transition side in the direction from the first end to the second end, and the transition side is arc-shaped or extends obliquely, which can change the direction of force transmission when the force is transmitted, which is conducive to the smooth transmission of the force and further avoids stress concentration on the adapter.

[0017] Furthermore, the transition side extends smoothly.

[0018] The beneficial effect is that the transition side has a smooth transition, which can avoid the existence of dangerous sections in the adapter and avoid the phenomenon of stress concentration in the adapter.

[0019] Furthermore, the projection shape of the adapter along the extension direction of the steel tube concrete column is a cross-sectional shape of a bowl.

[0020] Its beneficial effect is that the projection shape of the adapter along the extension direction of the steel tube concrete column is the cross-sectional shape of a bowl. The two arc-shaped sides of the cross-sectional shape of the bowl can avoid the force being transmitted along a straight line under the condition that the first end and the second end of the adapter have different sizes. The structure is simple and easy to implement.

[0021] Furthermore, a transition fillet is provided at the position where the transition side meets the steel section and / or the steel pipe.

[0022] Its beneficial effect is that a transition fillet is provided at the junction of the transition side and the steel section and / or steel pipe, which can avoid the occurrence of right angles that are prone to stress concentration at the junction of the steel section and / or steel pipe and the adapter, which is beneficial to reducing the risk of concentrated force and tearing deformation at the connection of the adapter due to external force, thereby improving the stability of the structure.

[0023] Furthermore, the cross-section of the second end of the adapter has the same dimension in the width direction as the width dimension of the steel pipe.

[0024] Its beneficial effects are: the cross-section of the second end of the adapter in the width direction is the same as the width of the steel pipe, so that the connection area between the second end of the adapter and the steel pipe is as large as possible, which is conducive to meeting the purpose of the connection area between the second end of the adapter and the steel pipe being larger than the connection area between the first end and the steel section, ensuring the reliability of the connection and also facilitating positioning during docking and fixing.

[0025] Furthermore, the inner wall of the steel pipe is connected to a load-bearing member, which is an inner ring plate arranged inside the steel pipe. An opening for concrete to pass through is arranged at the center of the inner ring plate, and an air hole for gas in the steel pipe to pass through is arranged at a position of the inner ring plate close to the inner wall of the steel pipe.

[0026] The beneficial effect thereof is that when the steel pipe is subjected to a force that causes the side walls to separate from each other, the load-bearing member can resist the force and tighten the inner side wall of the steel pipe, thereby ensuring the structural integrity of the steel pipe.

[0027] Furthermore, the connection node includes a ring beam, which includes a ring beam steel cage surrounding the outer periphery of the steel tube concrete column and concrete wrapping the ring beam steel cage; the projection shape of the ring beam steel cage along the extension direction of the steel tube concrete column is a rectangle, the extension direction of the adapter is parallel to the side of the rectangular ring beam steel cage, the outer periphery of the steel section is surrounded by a beam steel cage, the beam steel cage includes upper longitudinal steel bars on the upper side, lower longitudinal steel bars on the lower side in the vertical direction, and stirrups for tightening the upper longitudinal steel bars and the lower longitudinal steel bars, and the adapter is provided with ends for bending the upper longitudinal steel bars and the lower longitudinal steel bars and through holes for the stirrups to pass through.

[0028] The beneficial effect is that such an arrangement makes the connection area between the steel concrete beam and the ring beam larger, and the connection is more reliable and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a front view of a connection node embodiment 1 of a medium-sized steel concrete beam and a steel tube concrete column of the present invention;

[0030] Figure 2 A top view of a connection node embodiment 1 of a medium-sized steel concrete beam and a steel tube concrete column according to the present invention;

[0031] Figure 3for Figure 2 Schematic diagram of the connection structure between the intermediate connector and the steel section and steel pipe;

[0032] In the figure:

[0033] 10-concrete-filled steel tube column; 11-steel tube; 12-inner ring plate; 121-opening; 122-ventilation hole;

[0034] 20-steel concrete beam; 21-steel; 211-upper flange; 212-lower flange; 213-web;

[0035] 22-upper longitudinal reinforcement; 23-lower longitudinal reinforcement; 24-stirrups;

[0036] 30-ring beam; 31-inner longitudinal reinforcement of ring beam; 32-middle longitudinal reinforcement of ring beam; 33-outer longitudinal reinforcement of ring beam; 34-hoop reinforcement of ring beam;

[0037] 40 - adapter; 41 - first contour line; 42 - second contour line; 43 - first transition fillet; 44 - second transition fillet. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0040] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] The characteristics and performance of the connection node between the medium-sized steel concrete beam and the steel tube concrete column of the present invention are further described in detail below in conjunction with the embodiments.

[0042] Embodiment 1 of the connection node between the medium-sized steel concrete beam and the steel tube concrete column of the present invention is as follows Figure 1 and Figure 2 As shown, the connection node mainly includes a steel tube concrete column 10 arranged in the vertical direction and a steel concrete beam 20 arranged in the horizontal direction, and the steel concrete beam 20 is connected to the steel tube concrete column 10. The connection node also includes a ring beam 30, which is arranged at the position where the steel concrete beam 20 and the steel tube concrete column 10 are connected.

[0043] The steel tube concrete column 10 includes a steel tube 11 as a skeleton. The steel tube 11 is arranged in a vertical direction. Concrete is poured inside the steel tube 11. When the concrete solidifies, the steel tube concrete column 10 forms a steel-concrete structure. The steel tube 11 in this embodiment is a square tube with a square cross section. An inner ring plate 12 as a load-bearing member is arranged inside the steel tube 11. The outer contour of the inner ring plate 12 is a square that matches the contour of the inner wall surface of the steel tube 11. The inner ring plate 12 is connected to the four side walls of the steel tube 11. When the four side walls of the steel tube 11 are subjected to an external force that separates the side walls from each other, the side walls of the steel tube 11 can be tightened to improve the deformation resistance of the steel tube 11. Of course, the load-bearing member is connected to the inner wall of the steel tube 11 and can also withstand the pressure brought by the steel tube 11.

[0044] In order to facilitate pouring concrete into the steel pipe 11, an opening 121 for concrete to pass through is provided at the center of the inner ring plate 12. Applicably, in order to make the concrete flow more smoothly when pouring concrete, a vent hole 122 for gas in the steel pipe to pass through is provided at a position of the inner ring plate 12 close to the inner wall of the steel pipe. When the concrete enters the steel pipe 11, the gas originally existing in the steel pipe 11 will be discharged through the vent hole 122, so that the resistance of the concrete flow is smaller and the pouring process is smoother.

[0045] Four steel-concrete beams 20 are provided, which are connected to the four sides of the steel tube concrete column 10 respectively. Each steel-concrete beam 20 includes a steel 21 as a skeleton. The steel 21 in this embodiment is an I-beam, which includes an upper flange 211 and a lower flange 212 that are opposite and parallel in the upper and lower directions, and also includes a web 213 connected between the upper flange 211 and the lower flange 212. The outer periphery of the steel 21 is also surrounded by a beam reinforcement cage, which includes an upper longitudinal reinforcement 22 on the upper side, a lower longitudinal reinforcement 23 on the lower side in the vertical direction, and stirrups 24 that tighten the upper longitudinal reinforcement 22 and the lower longitudinal reinforcement 23. The upper longitudinal reinforcement 22, the lower longitudinal reinforcement 23 and the stirrups 24 are all arranged on the outer side of the steel 21, and are located inside the solidified steel-concrete beam after pouring concrete.

[0046] Between the steel section 21 and the steel pipe 11, there is an adapter 40 for connecting the two at the same time. The cross section of the adapter 40 in this embodiment is I-shaped. The adapter 40 is mainly composed of an upper flange 211, a lower flange 212, and a web 213 connected between the two flanges. Specifically, the adapter 40 has two ends in the extension direction, namely a first end connected to the steel section 21 and a second end connected to the steel pipe 11. The cross-sectional areas of both ends are I-shaped, but the cross-sectional areas of the I-shaped shapes at both ends are not equal. The end face of the first end of the adapter 40 connected to the steel section 21 is consistent with the end face of the I-shaped steel section 21, and the area is equal, while the end face area of ​​the second end of the adapter 40 connected to the steel pipe 11 is larger than the end face area of ​​the first end. In other words, in the direction from the first end to the second end of the adapter, the width of the two flanges widens. In other embodiments, the adapter may also adopt other structures, such as using square steel as the adapter, and the two ends of the square steel are respectively connected to the steel pipe and the steel section, and it is not limited to using I-beam as the adapter.

[0047] like Figure 3 As shown, the projection shape of the adapter 40 in the up-down direction, i.e., the extension direction of the steel tube concrete column 10, is a cross-sectional shape of a bowl. The upper flange and the lower flange of the adapter 40 have transition sides extending in an arc shape, and the transition sides on both sides of the upper flange and the lower flange constitute the line segments on both sides of the cross-sectional shape of the bowl. The transition sides include a first contour line 41 near the first end and a second contour line 42 near the second end, and the first contour line 41 is connected to the second contour line 42. Among them, the first contour line 41 extends in a direction oblique to the outside of the steel section, and the second contour line 42 extends along the axis direction of the steel section.

[0048] A first transition fillet 43 is provided at the junction of the first contour line 41 and the steel section 21, and a second transition fillet 44 is also provided at the junction of the first contour line 41 and the second contour line 42, so that the transition side presents a smooth transition posture when extending, so as to avoid the formation of stress concentration points on the transition side that reduce the rigidity and strength of the adapter. In other embodiments, the adapter can also use a straight side to connect the first end and the second end of the adapter, and is not limited to the use of an arc-shaped transition side. At the same time, when the transition side adopts an inclined extension or an arc-shaped extension method, a sharp angle structure can be arranged in the transition side, and is not limited to the use of a smooth transition method. In other embodiments, the transition side and the steel section and / or steel pipe can be set to a right angle at the junction, or only set to a transition fillet at the junction of the transition side and the steel section, or only set to a transition fillet at the intersection of the transition side and the steel pipe.

[0049] In this embodiment, the first end of the adapter 40 is aligned with and welded to the steel section 21, and the second end of the adapter 40 is consistent with the width dimension of the steel pipe 11 in the width direction of the steel pipe, that is, the width dimensions of the upper flange and the lower flange of the adapter 40 close to one end of the steel pipe are the same as the dimensions of the side of the steel pipe 11, and the second end of the adapter 40 is directly welded to the side of the steel pipe 11.

[0050] Correspondingly, the inner ring plates 12 in the steel tube 11 are arranged in pairs in the extending direction of the steel tube 11. In each pair of inner ring plates 12, the connection position between the upper inner ring plate 12 and the inner wall of the steel tube 11 is aligned with the connection position between the upper flange of the steel section 21 and the outer wall of the steel tube 11, and is also aligned with the upper flange of the adapter 40. The connection position between the lower inner ring plate 12 and the inner wall of the steel tube 11 is aligned with the connection position between the lower flange of the steel section 21 and the outer wall of the steel tube 11, and is also aligned with the lower flange of the adapter 40. The thickness of the inner ring plate is equal to the thickness of the upper flange and the lower flange of the steel section.

[0051] The ring beam 30 in this embodiment is mainly composed of a ring beam reinforcement cage and concrete. The width of the ring beam 30 is not less than the width of the steel concrete beam 20, and the height of the ring beam is the same as that of the steel concrete beam 20. The projection of the ring beam reinforcement cage in the extension direction of the steel tube concrete column is rectangular, and the length of each side of the ring beam reinforcement cage is the same, so that the projection of the ring beam reinforcement cage is square.

[0052] The ring beam reinforcement cage is entirely surrounded on the outer circumference of the steel tube concrete column 10. The ring beam reinforcement cage includes ring beam longitudinal bars that are surrounded in a square shape. The ring beam longitudinal bars are divided into ring beam inner longitudinal bars 31, ring beam middle longitudinal bars 32, and ring beam outer longitudinal bars 33 along the radial direction of the steel tube concrete column. The ring beam reinforcement cage also includes ring beam stirrups 34 that tighten the three layers of ring beam longitudinal bars. A plurality of ring beam stirrups 34 are arranged and evenly distributed on the ring beam longitudinal bars.

[0053] After the ring beam reinforcement cage is tied, a template is used to surround the reinforcement cage and concrete is poured to form a square ring beam 30. The four sides of the ring beam 30 extending in the vertical direction are respectively opposite to the four steel-concrete beams 20, and the whole presents a cross-shaped structure. In addition, the upper longitudinal reinforcement 22 and the lower longitudinal reinforcement 23 in the steel-concrete beam 20 extend into the ring beam reinforcement cage toward one end of the steel pipe 11, and the ends of the upper longitudinal reinforcement 22 and the lower longitudinal reinforcement 23 extending into the ring beam reinforcement cage are bent and anchored into the ring beam 30 when the concrete is poured. The adapter 40 is provided with through holes for the bent ends of the upper longitudinal reinforcement 22 and the lower longitudinal reinforcement 23 and the stirrups to pass through.

[0054] In this embodiment, the steel pipe 11, the inner ring plate 12 in the steel pipe 11 and the adapter 40 have been processed in the factory, and the inner ring plate 12 and the adapter 40 have been welded to the steel pipe 11. During the on-site construction, the steel pipe 11 in the steel tube concrete column 10 has been erected, and now it is necessary to complete the installation of the steel 21 in the steel concrete beam 20. The steel 21 in the steel concrete beam 20 is welded by multiple sections of steel. The welded steel is aligned and welded with the first end of the adapter 40, and then the beam reinforcement cage is tied on the outer circumference of the steel 21, and the upper longitudinal steel bars 22 and the lower longitudinal steel bars 23 are extended to the steel pipe 11 and abut against the side of the steel pipe 11. At the same time, the ends of the upper longitudinal steel bars 22 and the lower longitudinal steel bars 23 are bent, so that the bent ends of the upper longitudinal steel bars 22 and the lower longitudinal steel bars 23 are located in the installation area of ​​the ring beam 30, and the upper longitudinal steel bars 22 and the lower longitudinal steel bars 23 have sufficient anchoring length. Then, the ring beam stirrups 34 are tied and passed through the through holes on the adapter 40 , thereby completing the tying process of the four steel concrete beams 20 .

[0055] Finally, the ring beam reinforcement cage of the ring beam is tied, the inner longitudinal reinforcement 31 of the ring beam, the middle longitudinal reinforcement 32 of the ring beam and the outer longitudinal reinforcement 33 of the ring beam are placed in place, and the ring beam stirrups 34 are tied. Finally, the template is arranged to enclose the preset shape of the steel concrete beam 20, the steel tube concrete column 10 and the ring beam 30, and concrete is poured into the space enclosed by the template to complete the construction of the entire connection node.

[0056] In this embodiment, the force transmission path of the connection node is:

[0057] 1) The bending moment of the steel concrete beam is mainly transferred to the steel tube concrete column by the upper flange and lower flange of the steel through the adapter. The transition arc on the adapter is conducive to reducing stress concentration and promoting smooth transmission of internal force;

[0058] 2) The inner ring plate arranged inside the steel tube corresponds to the position of the adapter outside the steel tube. The inner ring plate is conducive to ensuring the stability of the side wall of the steel tube concrete column and making the internal force of the adapter more reliably transmitted to the steel tube concrete column;

[0059] 3) Part of the bending moment of the steel concrete beam is directly transferred to the inside of the ring beam through the upper longitudinal reinforcement and lower longitudinal reinforcement anchored in the ring beam;

[0060] 4) The shear force of the steel concrete beam is mainly transmitted to the side wall of the steel tube concrete column through the web of the adapter.

[0061] The connection node between the steel concrete beam and the steel tube concrete column in the present invention is relatively simple in structure, easy to construct, and has a clear and reliable force transmission path. Of course, the connection node between the steel concrete beam and the steel tube concrete column in the present invention is not limited to the technical solution provided in the above embodiment 1, and the technical solution provided in the following embodiments can also be used.

[0062] Embodiment 2 of the connection node between the medium-shaped steel-concrete beam and the steel tube concrete column of the present invention: The difference from the above embodiments is that, in this embodiment, the shape of the cross-section of the first end of the adapter is different from the shape of the end face of the steel section, and the adapter is connected to the steel section at one end, and the end face of the steel section is directly overlapped on the plate surface of the adapter; or the shape of the cross-section of the first end of the adapter is the same as the shape of the end face of the steel section, and it still adopts an I-shape, but the area of ​​the cross-section of the first end of the adapter is larger than the area of ​​the end face of the steel section, and the end face of the steel section can fall entirely on the first end cross-section of the adapter.

[0063] Embodiment 3 of the connection node between a medium-sized steel-concrete beam and a steel tube concrete column of the present invention: The difference from the above embodiments is that, in this embodiment, the projection shape of the adapter along the extension direction of the steel tube concrete column is a "convex" shape, and the transition side of the adapter is a "Z" shape; or in other embodiments, the projection shape of the adapter along the extension direction of the steel tube concrete column is a semicircle or an isosceles trapezoid, and the width dimension of the first end of the adapter is smaller than the width dimension of the second end, and is not limited to using a bowl-shaped cross-sectional shape as the projection shape of the adapter along the extension direction of the steel tube concrete column.

[0064] Embodiment 4 of the connection node between the medium-sized steel-concrete beam and the steel tube concrete column of the present invention: The difference from the above embodiments is that, in this embodiment, the steel tube in the steel tube concrete column is a circular tube, the second end of the adapter is an arc surface adapted to the outer circumferential surface of the circular tube, and is directly welded to the circular arc surface of the circular tube, and the load-bearing member is a circular ring plate. At this time, it is only necessary to ensure that the docking area between the second end of the adapter and the circular tube is larger than the docking area between the second end of the adapter and the steel section.

[0065] Embodiment 5 of the connection node between the medium-sized steel concrete beam and the steel tube concrete column of the present invention: The difference from the above embodiments is that in this embodiment, the load-bearing member arranged in the steel tube can also adopt other shapes, such as an angle structure, connected at the intersection of two adjacent side walls in the square steel tube, and the angle-shaped load-bearing member is connected to the corresponding side wall through its two right-angled sides to achieve tensioning of the adjacent two side walls in the steel tube. In other embodiments, a long strip load-bearing member can also be used, and in this case, the two ends of the long strip load-bearing member are respectively connected to the two opposite side walls in the steel tube to achieve tensioning of the two opposite side walls in the steel tube.

[0066] The specific implementation methods described above further illustrate the invention objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The connection node between steel concrete beam and steel tube concrete column includes: Steel tube concrete column, the steel tube concrete column includes a steel tube as a skeleton, an inner ring plate as a load-bearing member is arranged inside the steel tube, and the outer contour of the inner ring plate is consistent with the contour of the inner wall surface of the steel tube; A steel-concrete beam, wherein a beam reinforcement cage surrounds the outer periphery of the steel, and the beam reinforcement cage includes an upper longitudinal reinforcement located upward in the vertical direction and a lower longitudinal reinforcement located downward in the vertical direction; It is characterized by further comprising: A ring beam, the ring beam comprising a ring beam reinforcement cage surrounding the outer periphery of the steel tube concrete column, and concrete enveloping the ring beam reinforcement cage; The adapter is arranged between the steel tube concrete column and the steel concrete beam, and is respectively connected to the steel tube in the steel tube concrete column and the steel in the steel concrete beam; The adapter includes a first end connected to the end face of the steel in the steel concrete beam and a second end connected to the side face of the steel tube in the steel tube concrete column; the cross-sectional area of ​​the second end of the adapter is larger than the cross-sectional area of ​​the first end, and the cross-sectional area of ​​the first end is not less than the area of ​​the end face of the steel in the steel concrete beam. The steel tube in the steel tube concrete column is a square tube. The cross-section of the adapter is an I-shaped one with two flanges arranged in parallel in the up and down directions. The width of the two flanges of the adapter widens from the first end to the second end. The adapter is butted against the steel section through the end face, and the cross section of the first end of the adapter matches the shape of the end face of the steel section. The adapter also includes a web connected between the two flanges. The inner ring plates are arranged in pairs in the extension direction of the steel pipe. The connection position of the upper inner ring plate of each pair of inner ring plates with the inner wall of the steel pipe is aligned with the upper flange of the steel section and the adapter, and the connection position of the lower inner ring plate with the inner wall of the steel pipe is aligned with the lower flange of the steel section and the adapter. The thickness of the inner ring plate is equal to the thickness of the upper and lower flanges in the steel section. The ends of the upper longitudinal steel bars and the lower longitudinal steel bars extending into the steel cage of the ring beam are bent and anchored into the ring beam when pouring concrete.

2. The connection node between the steel concrete beam and the steel tube concrete column according to claim 1, characterized in that: The width of the first end of the flange in the transition piece is smaller than the width of the second end of the flange, and the flange has an arc-shaped or inclined transition side edge extending in the direction from the first end to the second end.

3. The connection node between the steel concrete beam and the steel tube concrete column according to claim 2, characterized in that: The transition is smooth as the sides extend.

4. The connection node between the steel concrete beam and the steel tube concrete column according to claim 3, characterized in that: The projection shape of the adapter along the extension direction of the steel tube concrete column is a cross-sectional shape of a bowl.

5. The connection node between the steel concrete beam and the steel tube concrete column according to claim 2, characterized in that: A transition fillet is provided at the position where the transition side meets the section steel and / or the steel pipe.

6. The connection node between a steel concrete beam and a steel tube concrete column according to claim 1, characterized in that: The cross-section of the second end of the adapter in the width direction is the same as the width of the steel pipe.

7. The connection node between a steel concrete beam and a steel tube concrete column according to claim 1, characterized in that: An opening for concrete to pass through is arranged at the center of the inner ring plate, and a vent hole for gas in the steel pipe to pass through is arranged at a position of the inner ring plate close to the inner wall of the steel pipe.

8. The connection node between a steel concrete beam and a steel tube concrete column according to claim 1, characterized in that: The projection shape of the ring beam reinforcement cage along the extension direction of the steel tube concrete column is a rectangle, the extension direction of the adapter is parallel to the side of the rectangular ring beam reinforcement cage, the beam reinforcement cage also includes stirrups for tightening the upper longitudinal reinforcements and the lower longitudinal reinforcements, and the adapter is provided with ends for bending the upper longitudinal reinforcements and the lower longitudinal reinforcements and through holes for the stirrups to pass through.

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