A connecting structure between a frame column and a reinforced concrete beam and its construction method

Abstract

A connecting structure between a frame column and a reinforced concrete beam and its construction method, comprising a frame column and a reinforced concrete beam; a steel bar anchorage box is provided at a position corresponding to the upper part of the reinforced concrete beam on the side of the frame column close to the reinforced concrete beam; a socket is provided at the top of the steel bar anchorage box; one end of the upper longitudinal bar of the beam close to the frame column is bent downward by 90° to form an insertion section; the insertion section is inserted into the steel bar anchorage box, and the insertion depth is not less than 8 times the nominal diameter of the upper longitudinal bar of the beam; the steel bar anchorage box is filled with high-strength ductile mortar; a connecting piece is provided on the side of the frame column close to the reinforced concrete beam at a position corresponding to the lower longitudinal bar of the beam; the lower longitudinal bar of the beam is fixedly connected to the connecting piece; the beam concrete is poured on the outside of the beam steel bar skeleton. In the present invention, the technical problem that the traditional beam-column joint cannot reduce the construction difficulty and construction complexity on the premise of satisfying the reliability of the internal force transfer of the joint, the anti-bearing capacity of the joint and the anti-shear bearing capacity of the joint is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of structural engineering, and particularly relates to a connection structure between a frame column and a reinforced concrete beam and a construction method thereof. Background Art

[0002] With the rapid development of the construction industry in China, there are more and more high-rise buildings in cities. Due to the comprehensive advantages of the steel-concrete composite frame structure in terms of seismic resistance, fire protection and cost, this structural form is mostly adopted in super high-rise buildings. At present, reinforced concrete is still mostly used for frame beams. Due to the mechanical properties of beam-column joints, the upper longitudinal reinforcement of the beam needs to bear a large negative bending moment at the joint. The upper longitudinal reinforcement of the beam has a large amount of reinforcement, many rows of steel bars, and small steel bar spacing. Coupled with problems such as a high seismic design category of the structural system, the steel structure system does not allow holes to be opened and the space at the connection part is small, etc., the reasonable connection between the reinforced concrete beam and the frame column has become a difficult point in the construction of such projects.

[0003] Common connection forms between reinforced concrete beams and steel-concrete columns in practical projects include: ring beam type, longitudinal reinforcement penetration type, steel corbel type, etc. The ring beam type has a certain influence on the reliability of internal force transfer between beams; the longitudinal reinforcement penetration type makes the frame column discontinuous in the joint area, and it is difficult to ensure the original rigidity of the joint; the steel corbel type consumes a large amount of steel, and the upper longitudinal reinforcement of the beam and the frame column adopt a welding connection method, which is cumbersome in on-site construction, has a large amount of welding work, and the welding quality cannot be guaranteed. In order to realize the reasonable connection between the reinforced concrete beam and the steel frame column, improve the construction efficiency of the building structure, and encourage scholars to develop reasonable beam-column joint structural forms, while ensuring the anti-bearing capacity and anti-shear bearing capacity of the joint, reduce the construction difficulty and complexity, and develop beam-column connection joints with simpler construction operations and higher construction efficiency.

[0004] In summary, how to provide a node structural form that is convenient for construction and has reliable connection and is suitable for frame columns and reinforced concrete beams is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0005] The purpose of the invention is to provide a connection structure between a frame column and a reinforced concrete beam and a construction method thereof, and to solve the technical problem that the traditional beam-column joint cannot reduce the construction difficulty and construction complexity on the premise of satisfying the reliability of node internal force transfer, the anti-bearing capacity of the node and the anti-shear bearing capacity of the node.

[0006] To achieve the above object, the invention adopts the following technical solutions.

[0007] A connecting structure between a frame column and a reinforced concrete beam, comprising a frame column and a reinforced concrete beam; the reinforced concrete beam includes a beam steel bar framework composed of upper longitudinal bars, lower longitudinal bars and stirrups of the beam and beam concrete; on the side of the frame column close to the reinforced concrete beam, at the upper position corresponding to the reinforced concrete beam, a steel bar anchorage box is provided; the steel bar anchorage box is located below the upper longitudinal bars of the beam, and a socket for inserting steel bars is provided at the top of the steel bar anchorage box; one end of the upper longitudinal bar of the beam close to the frame column is bent downward by 90°, forming an insertion section; the insertion section is inserted into the steel bar anchorage box, and the insertion depth is not less than 8 times the nominal diameter of the upper longitudinal bar of the beam; the steel bar anchorage box is filled with high-strength ductile mortar; on the side of the frame column close to the reinforced concrete beam, at the position corresponding to the lower longitudinal bar of the beam, a connecting piece is provided; the lower longitudinal bar of the beam is fixedly connected with the connecting piece; the beam concrete is poured on the outside of the beam steel bar framework.

[0008] Preferably, the frame column is an H-shaped column or a concrete-filled steel tube column or a steel reinforced concrete column;

[0009] When the frame column is an H-shaped column, stiffening plates are respectively arranged on both sides of the web of the frame column at the positions corresponding to the upper longitudinal bar and the lower longitudinal bar of the beam; both ends of the stiffening plate are welded and connected with the two flange plates of the frame column.

[0010] Preferably, the reinforced concrete beam is a precast reinforced concrete beam or a cast-in-situ reinforced concrete beam;

[0011] When the reinforced concrete beam is a precast reinforced concrete beam, there is a spacing between the beam concrete of the precast reinforced concrete beam and the frame column; the end of the beam steel bar framework provided with the insertion section extends beyond the end face of the beam concrete, and the upper longitudinal bar of the beam is correspondingly connected with the steel bar anchorage box, and the upper longitudinal bar of the beam is correspondingly connected with the connecting piece; the high-strength ductile mortar is poured at the position between the beam concrete and the frame column to connect the beam concrete and the frame column;

[0012] When the reinforced concrete beam is a cast-in-situ reinforced concrete beam, the beam concrete is poured throughout on the outside of the steel bar framework, and the end face of the beam concrete is connected with the frame column.

[0013] Preferably, the upper longitudinal bar of the beam is arranged in one row or two rows up and down;

[0014] When there is one row of longitudinal bars at the upper part of the beam, the steel bar anchorage box is a single anchorage box body; the steel bar anchorage box includes a first bottom plate and a first side plate; the horizontal section of the first side plate is U-shaped, and the two ends of the first side plate are respectively welded to the frame column by bevel welding; the height of the first side plate is not less than 10d; the width of the first side plate is not greater than 2.5d, and the difference between the width of the first side plate and d of the longitudinal bars at the upper part of the beam is not less than 15mm; the first bottom plate seals the bottom of the space enclosed by the first side plate and the frame column; d is the nominal diameter of the longitudinal bars at the upper part of the beam.

[0015] When there are two rows of longitudinal bars at the upper part of the beam, the steel bar anchorage box is a double anchorage box body, including a main anchorage box body and an additional anchorage box body; the main anchorage box body includes a second bottom plate and a second side plate; the horizontal section of the second side plate is U-shaped, and the two ends of the second side plate are respectively welded to the frame column by bevel welding; the height of the second side plate is not less than 12d; the width of the second side plate is not greater than 2.5d, and the difference between the width of the second side plate and d of the longitudinal bars at the upper part of the beam is not less than 15mm; the second bottom plate seals the bottom of the space enclosed by the second side plate and the frame column.

[0016] The additional anchorage box body includes a third bottom plate and a third side plate; the horizontal section of the third side plate is U-shaped, and the two ends of the third side plate are respectively welded to the second side plate by bevel welding; the top of the third side plate is lower than the top of the second side plate, and the bottom of the third side plate is flush with the bottom of the second side plate; the height of the third side plate is not less than 10d; the width of the third side plate is not greater than 2.5d, and the difference between the width of the third side plate and d of the longitudinal bars at the upper part of the beam is not less than 15mm; the third bottom plate seals the bottom of the space enclosed by the third side plate and the second side plate.

[0017] Preferably, a reinforcing connecting steel plate is vertically arranged inside the steel bar anchorage box; one vertical side of the reinforcing connecting steel plate is welded to the frame column, and the other vertical side of the reinforcing connecting steel plate is connected to the steel bar anchorage box or extends beyond the steel bar anchorage box; stud bolts are arranged at intervals on the outer surface of the steel bar anchorage box.

[0018] Preferably, when the reinforced concrete beam is a precast reinforced concrete beam, the connecting piece is a supporting steel plate; the connecting piece is arranged at the bottom of a group of longitudinal bars at the lower part of the beam, and the end of the longitudinal bars at the lower part of the beam is lapped on the supporting steel plate and welded to the supporting steel plate.

[0019] Preferably, when the reinforced concrete beam is a cast-in-place reinforced concrete beam, the connecting piece is an internal thread sleeve or a supporting steel plate.

[0020] When the connecting piece is an internal-thread sleeve, there is a set of the internal-thread sleeves, and the set of internal-thread sleeves is arranged corresponding to the lower longitudinal bars of a row of beams; the lower longitudinal bars of the beams are correspondingly inserted into the internal-thread sleeves and are in threaded connection with the sleeves.

[0021] When the connecting piece is a supporting steel plate, the supporting steel plate is arranged at the bottom of a set of lower longitudinal bars of the beams; the ends of the lower longitudinal bars of the beams are placed on the supporting steel plate and are in welded connection with the supporting steel plate.

[0022] A construction method for a connection structure between a frame column and a reinforced concrete beam comprises the following steps.

[0023] Step 1, arrange a connecting piece on the side surface of the frame column close to the reinforced concrete beam, corresponding to the position of the lower longitudinal bars of the beam.

[0024] Step 2, prefabricate a steel bar anchoring box.

[0025] Step 3, connect the steel bar anchoring box to the side surface of the frame column close to the reinforced concrete beam, corresponding to the upper position of the reinforced concrete beam.

[0026] Step 4, construct the reinforced concrete beam, and complete the connection between the upper longitudinal bars of the beam and the steel bar anchoring box and the connection between the lower longitudinal bars of the beam and the connecting piece. Thus, the construction is completed.

[0027] Preferably, when the reinforced concrete beam is a precast reinforced concrete beam, there is a spacing between the beam concrete of the precast reinforced concrete beam and the frame column; the end of the beam steel bar framework provided with an inserting section extends beyond the end face of the beam concrete; the specific method of Step 4 is as follows.

[0028] Step 1, hoist the precast reinforced concrete beam into place, and insert the inserting section of the upper longitudinal bars of the beam into the steel bar anchoring box.

[0029] Step 2, fixedly connect the lower longitudinal bars of the beam with the connecting piece.

[0030] Step 3, form a mold and pour high-strength ductile mortar between the beam concrete and the frame column: first fill the high-strength ductile mortar in the steel bar anchoring box, and then pour the high-strength ductile mortar outside the steel bar anchoring box. Thus, the construction is completed.

[0031] Preferably, when the reinforced concrete beam is a cast-in-situ reinforced concrete beam, the specific method of Step 4 is as follows.

[0032] Step 1, arrange the upper longitudinal bars of the beam, and bend the end of the upper longitudinal bars of the beam close to the frame column downward by 90° to form an inserting section.

[0033] Step 2, correspondingly insert the inserting section into the steel bar anchoring box.

[0034] Step 3: Tie some stirrups near the beam-column joint to fix the relative position of a set of upper longitudinal reinforcements of the beam.

[0035] Step 4: Pour high-strength and ductile mortar into the steel bar anchor box first.

[0036] Step 5: Pass the lower longitudinal reinforcement of the beam through the stirrups near the tied beam-column node, and connect the end of the lower longitudinal reinforcement of the beam close to the frame column to the connecting piece.

[0037] Step 6: Support the formwork and pour the beam concrete, and the construction is completed.

[0038] Compared with the prior art, the present invention has the following characteristics and beneficial effects.

[0039] 1. In the connection structure between the frame column and the reinforced concrete beam provided by the present invention, a steel bar anchor box is arranged on the side wall of the frame column, and the end of the upper longitudinal reinforcement of the beam is bent 90° and then directly inserted into the steel bar anchor box welded on the frame column, and high-strength ductility mortar is first poured into the box to complete the connection between the upper longitudinal reinforcement of the beam and the frame column. The high-strength ductility mortar poured first can bond well with the later poured concrete, and the steel section and concrete are reliably bonded and can work together to form a complete beam-column node; this connection structure greatly simplifies the complex on-site construction procedures, reduces the workload of on-site steel bar welding, and can ensure reliable node connection.

[0040] 2. The connection between the frame column and the lower longitudinal reinforcement of the beam in the present invention adopts mechanical connection of steel bar welding sleeve or lap welding of welded cantilever plate. This structural form overcomes the difficulties of high construction difficulty, large welding workload and poor welding quality in the direct welding connection between the upper longitudinal reinforcement of the beam and the frame column, greatly reduces the workload, and has the advantages of convenient construction, reliable node connection and stable quality.

[0041] 3. Generally, the construction of beam-column joints is a very important part in the construction of steel reinforced concrete composite structures. The connection structure form in the present invention solves the problems existing in the actual project, where the steel bars of the reinforced concrete beam and the steel column are mostly connected by welding inside the beam, including the cumbersome and complex construction, large welding workload, slow progress and impact on the construction period. It effectively reduces the difficulty of on-site construction, speeds up the construction progress, makes the construction more convenient and ensures the construction quality. At the same time, the beam-column joints formed after the integrated pouring of the steel bar skeletons in the reinforced concrete beam and the frame column through the steel bar anchorage box are of reliable quality and can effectively transfer the bending moment at the connection node of the reinforced concrete beam and the steel column. On the premise of ensuring the flexural bearing capacity and shear bearing capacity of the beam-column joints, it reduces the construction difficulty and complexity, and the construction operation is simpler and the construction efficiency is higher. Further, by setting the reinforcing connection steel plates parallel to the two side steel plates of the steel bar anchorage box inside the steel bar anchorage box, the stiffness and strength of the steel bar anchorage box can be increased, effectively enhancing the connection performance between the beam and the column and ensuring the bearing capacity of the beam-column joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described in detail below with reference to the accompanying drawings.

[0043] Figure 1 FIG. is a schematic diagram of the connection structure between the cast-in-place reinforced concrete beam and the frame column when the steel bar anchorage box is a single anchorage box body in the present invention.

[0044] Figure 2 FIG. is a process diagram of the connection between the precast reinforced concrete beam and the frame column when the steel bar anchorage box is a single anchorage box body in the present invention.

[0045] Figure 3 FIG. is a schematic diagram of the connection structure between the cast-in-place reinforced concrete beam and the frame column when the steel bar anchorage box is a double anchorage box body in the present invention.

[0046] Figure 4 FIG. is a schematic diagram of the connection structure between the cast-in-place reinforced concrete beam and the frame column when stud bolts are arranged on the double anchorage box body in the present invention.

[0047] Figure 5 FIG. Figure 1 is a schematic cross-sectional structure diagram of A-A in

[0048] Figure 6 FIG. Figure 3 is a schematic cross-sectional structure diagram of B-B in

[0049] Figure 7 FIG. Figure 3 is a schematic cross-sectional structure diagram of C-C in

[0050] Figure 8It is a schematic horizontal sectional view of the connection structure between a cast-in-place reinforced concrete beam and a frame column when an enhanced connection steel plate is provided in the single-anchoring box body of the present invention and the end of the enhanced connection steel plate extends beyond the steel bar anchoring box.

[0051] Figure 9 It is a schematic horizontal sectional view of the connection structure between a cast-in-place reinforced concrete beam and a frame column when an enhanced connection steel plate is provided in the single-anchoring box body of the present invention and the end of the enhanced connection steel plate is connected to the outside of the steel bar anchoring box.

[0052] Figure 10 It is a schematic structural view of the double-anchoring box body of the present invention.

[0053] Figure 11 It is a schematic structural view of the single-anchoring box body of the present invention.

[0054] Reference numerals: 1 - frame column, 2 - steel bar anchoring box, 2.1 - first bottom plate, 2.2 - first side plate, 2a - main anchoring box body, 2a.1 - second bottom plate, 2a.2 - second side plate, 2b - additional anchoring box body, 2b.1 - third bottom plate, 2b.2 - third side plate, 3 - reinforced concrete beam, 3.1 - upper longitudinal bars of the beam, 3.1.1 - inserted section, 3.2 - lower longitudinal bars of the beam, 3.3 - stirrups, 3.4 - beam concrete, 4 - socket, 5 - high-strength ductile mortar, 6 - connecting piece, 7 - stiffening plate, 8 - stud, 9 - enhanced connection steel plate. Detailed implementation manners

[0055] As Figures 1-11 shown, this connection structure between the frame column and the reinforced concrete beam includes a frame column 1 and a reinforced concrete beam 3; the reinforced concrete beam 3 includes a beam steel bar skeleton composed of upper longitudinal bars 3.1, lower longitudinal bars 3.2, and stirrups 3.3 of the beam and beam concrete 3.4; on the side of the frame column 1 close to the reinforced concrete beam 3, at the upper position corresponding to the reinforced concrete beam 3, a steel bar anchoring box 2 is provided; the steel bar anchoring box 2 is located below the upper longitudinal bars 3.1 of the beam, and at the top of the steel bar anchoring box 2, a socket 4 for inserting steel bars is provided; one end of the upper longitudinal bars 3.1 of the beam close to the frame column 1 is bent downward by 90° to form an inserted section 3.1.1; the inserted section 3.1.1 is inserted into the steel bar anchoring box 2, and the insertion depth is not less than 8 times the nominal diameter of the upper longitudinal bars 3.1 of the beam; the steel bar anchoring box 2 is filled with high-strength ductile mortar 5; on the side of the frame column 1 close to the reinforced concrete beam 3, at the position corresponding to the lower longitudinal bars 3.2 of the beam, a connecting piece 6 is provided; the lower longitudinal bars 3.2 of the beam are fixedly connected to the connecting piece 6; the beam concrete 3.4 is poured outside the beam steel bar skeleton.

[0056] In this embodiment, the frame column 1 is an H-shaped column.

[0057] Of course, in other embodiments, the frame column 1 may also be a concrete-filled steel tube column or a steel reinforced concrete column;

[0058] When the frame column 1 is an H-shaped column, stiffening plates 7 are respectively arranged on both sides of the web of the frame column 1 at positions corresponding to the upper longitudinal bars 3.1 and the lower longitudinal bars 3.2 of the beam; both ends of the stiffening plate 7 are welded to the two flange plates of the frame column 1.

[0059] In this embodiment, the reinforced concrete beam 3 is a precast reinforced concrete beam or a cast-in-situ reinforced concrete beam;

[0060] When the reinforced concrete beam 3 is a precast reinforced concrete beam, there is a spacing between the beam concrete 3.4 of the precast reinforced concrete beam and the frame column 1; the end of the beam steel reinforcement cage provided with the insertion section 3.1.1 extends beyond the end face of the beam concrete 3.4, and the upper longitudinal bar 3.1 of the beam is correspondingly connected to the steel bar anchorage box 2 and the upper longitudinal bar 3.1 of the beam is correspondingly connected to the connecting member 6; the high-strength ductile mortar 5 is poured at the position between the beam concrete 3.4 and the frame column 1 to connect the beam concrete 3.4 and the frame column 1;

[0061] When the reinforced concrete beam 3 is a cast-in-situ reinforced concrete beam, the beam concrete 3.4 is cast through the length on the outside of the steel reinforcement cage, and the end face of the beam concrete 3.4 is connected to the frame column 1.

[0062] In this embodiment, the upper longitudinal bar 3.1 of the beam is arranged in one row or two rows, upper and lower;

[0063] When the upper longitudinal bar 3.1 of the beam is arranged in one row, the steel bar anchorage box 2 is a single anchorage box body; the steel bar anchorage box 2 includes a first bottom plate 2.1 and a first side plate 2.2; the horizontal section of the first side plate 2.2 is U-shaped, and both ends of the first side plate 2.2 are welded to the frame column 1 by bevel welding; the height of the first side plate 2.2 is not less than 10d; the width of the first side plate 2.2 is not greater than 2.5d, and the difference between the width of the first side plate 2.2 and d of the upper longitudinal bar 3.1 of the beam is not less than 15 mm; the first bottom plate 2.1 plugs the bottom of the space surrounded by the first side plate 2.2 and the frame column 1; d is the nominal diameter of the upper longitudinal bar 3.1 of the beam;

[0064] When there are two rows of longitudinal bars at the upper part of the beam 3.1, the steel bar anchorage box 2 is a double-anchorage box body, including a main anchorage box body 2a and an additional anchorage box body 2b; the main anchorage box body 2a includes a second bottom plate 2a.1 and second side plates 2a.2; the horizontal cross-section of the second side plates 2a.2 is U-shaped, and both ends of the second side plates 2a.2 are welded to the frame column 1 by bevel welding; the height of the second side plates 2a.2 is not less than 12d; the width of the second side plates 2a.2 is not greater than 2.5d, and the difference between the width of the second side plates 2a.2 and the d of the longitudinal bars at the upper part of the beam 3.1 is not less than 15 mm; the second bottom plate 2a.1 seals the bottom of the space enclosed by the second side plates 2a.2 and the frame column 1.

[0065] The additional anchorage box body 2b includes a third bottom plate 2b.1 and third side plates 2b.2; the horizontal cross-section of the third side plates 2b.2 is U-shaped, and both ends of the third side plates 2b.2 are welded to the second side plates 2a.2 by bevel welding; the top of the third side plates 2b.2 is lower than the top of the second side plates 2a.2, and the bottom of the third side plates 2b.2 is flush with the bottom of the second side plates 2a.2; the height of the third side plates 2b.2 is not less than 10d; the width of the third side plates 2b.2 is not greater than 2.5d, and the difference between the width of the third side plates 2b.2 and the d of the longitudinal bars at the upper part of the beam 3.1 is not less than 15 mm; the third bottom plate 2b.1 seals the bottom of the space enclosed by the third side plates 2b.2 and the second side plates 2a.2.

[0066] In this embodiment, a reinforcing connection steel plate 9 is vertically arranged inside the steel bar anchorage box 2; one vertical side of the reinforcing connection steel plate 9 is welded to the frame column 1, and the other vertical side of the reinforcing connection steel plate 9 is connected to the steel bar anchorage box 2 or extends outside the steel bar anchorage box 2; when the reinforcing connection steel plate 9 extends outside the steel bar anchorage box 2, the length of the extended part on the side is not less than 50 mm; stud bolts 8 are arranged at intervals on the outer surface of the steel bar anchorage box 2.

[0067] In this embodiment, when the reinforced concrete beam 3 is a precast reinforced concrete beam, the connecting member 6 is a supporting steel plate; the connecting member 6 is arranged at the bottom of a group of longitudinal bars 3.2 at the lower part of the beam, and the ends of the longitudinal bars 3.2 at the lower part of the beam are placed on the supporting steel plate and welded to the supporting steel plate.

[0068] In this embodiment, when the reinforced concrete beam 3 is a cast-in-place reinforced concrete beam, the connecting member 6 is an internal thread sleeve or a supporting steel plate;

[0069] When the connecting member 6 is an internal thread sleeve, a group of internal thread sleeves are provided, and a group of internal thread sleeves are arranged corresponding to a row of longitudinal bars 3.2 at the lower part of the beam; the longitudinal bars 3.2 at the lower part of the beam are correspondingly inserted into the internal thread sleeves and are thread-connected with the sleeves;

[0070] When the connecting member 6 is a supporting steel plate, the supporting steel plate is arranged at the bottom of a group of lower longitudinal reinforcements 3.2 of the beam; the ends of the lower longitudinal reinforcements 3.2 of the beam are laid on the supporting steel plate and are welded to the supporting steel plate.

[0071] Of course, in other embodiments, when the frame column 1 is the middle column and both sides of the cross-section of the reinforced concrete beam 3 extend beyond the left and right sides of the frame column 1 respectively, the upper longitudinal reinforcement 3.1 and the lower longitudinal reinforcement 3.2 of the reinforced concrete beam 3 located at the portion where the reinforced concrete beam 3 extends beyond the frame column 1 pass through the frame column 1 at the node, and extend through the upper longitudinal reinforcement 3.1 and the lower longitudinal reinforcement 3.2 of the frame column 1 into the reinforced concrete beam 3 on the opposite side.

[0072] In another embodiment, when the frame column 1 is a middle column and the two sides of the cross section of the reinforced concrete beam 3 do not extend beyond the left and right sides of the frame column 1, through holes are opened on the frame column 1 at the positions corresponding to the upper longitudinal reinforcement 3.1 of the partial beam and the lower longitudinal reinforcement 3.2 of the partial beam; the upper longitudinal reinforcement 3.1 of the partial beam and the lower longitudinal reinforcement 3.2 of the partial beam pass through the through holes and extend into the reinforced concrete beam 3 on the opposite side.

[0073] The construction method of the connection structure between the frame column and the reinforced concrete beam includes the following steps.

[0074] Step 1: A connector 6 is provided on the side surface of the frame column 1 close to the reinforced concrete beam 3, corresponding to the position of the lower longitudinal reinforcement 3.2 of the beam.

[0075] Step 2: prefabricate the steel bar anchor box 2.

[0076] Step three, connect the steel bar anchor box 2 to the side surface of the frame column 1 close to the reinforced concrete beam 3, corresponding to the upper position of the reinforced concrete beam 3.

[0077] Step 4: construct the reinforced concrete beam 3, and complete the connection between the upper longitudinal reinforcement 3.1 of the beam and the reinforcement anchor box 2 and the connection between the lower longitudinal reinforcement 3.2 of the beam and the connecting piece 6, and the construction is completed.

[0078] In this embodiment, when the reinforced concrete beam 3 is a precast reinforced concrete beam, a distance is left between the beam concrete 3.4 of the precast reinforced concrete beam and the frame column 1; the beam steel frame is provided with an end portion of the plug-in section 3.1.1 extending beyond the end face of the beam concrete 3.4; the specific method of step four is as follows.

[0079] Step 1: hoist the prefabricated reinforced concrete beam into place, and insert the splicing section 3.1.1 of the upper longitudinal reinforcement 3.1 of the beam into the reinforcement anchor box 2.

[0080] Step 2, fix the lower longitudinal reinforcement 3.2 of the beam to the connecting piece 6.

[0081] Step 3, formwork and pour high-strength ductility mortar 5 between beam concrete 3.4 and frame column 1: first fill the high-strength ductility mortar 5 in the steel bar anchor box 2, and then pour the high-strength ductility mortar 5 outside the steel bar anchor box 2, and the construction is completed.

[0082] In this embodiment, when the reinforced concrete beam 3 is a cast-in-place reinforced concrete beam, the specific method of step 4 is as follows.

[0083] Step 1: Arrange the upper longitudinal reinforcement 3.1 of the beam, and bend one end of the upper longitudinal reinforcement 3.1 of the beam close to the frame column 1 downward by 90 degrees to form a plug-in section 3.1.1.

[0084] Step 2, insert the plug-in section 3.1.1 into the steel bar anchor box 2 accordingly.

[0085] Step 3, tying some stirrups 3.3 near the beam-column joint to fix the relative position of a set of upper longitudinal reinforcements 3.1 of the beam.

[0086] Step 4: first pour high-strength and ductile mortar 5 into the steel bar anchor box 2.

[0087] Step 5, pass the lower longitudinal reinforcement 3.2 of the beam through the stirrups 3.3 near the tied beam-column node, and connect the end of the lower longitudinal reinforcement 3.2 of the beam close to the frame column 1 to the connecting piece 6.

[0088] Step 6, formwork and pouring beam concrete 3.4, and the construction is completed.

[0089] In this embodiment, the manufacturing method of the steel bar anchor box 2 provided with the reinforced connecting steel plate 9 is as follows:

[0090] When the steel bar anchor box 2 is a single anchor box body, the first side plate 2.2 is spliced ​​by two L-shaped steel plates. During construction, the reinforced connecting steel plate 9 is first welded to the side of the frame column 1 by groove welding; the two L-shaped steel plates are also groove welded and are respectively welded to the two sides of the reinforced connecting steel plate 9; one vertical side of the L-shaped steel plate is welded to the side of the frame column 1, and the other vertical side of the L-shaped steel plate is welded to the reinforced connecting steel plate 9.

[0091] When the steel bar anchor box 2 is a single anchor box body, the steel bar anchor box 2 provided with a reinforced connecting steel plate 9 can also be spliced ​​by a U-shaped steel plate and an L-shaped steel plate; wherein, the two ends of the U-shaped steel plate are respectively welded to the frame column 1 by groove welding, one end of the L-shaped steel plate is welded to the frame column 1 by groove welding, and the other end of the L-shaped steel plate is welded to the U-shaped steel plate by groove welding; in the structure of the steel bar anchor box 2, the reinforced connecting steel plate 9 is the longitudinal plate section of the U-shaped steel plate of the steel bar anchor box 2 close to one side of the L-shaped steel plate, and the first side plate 2.2 is spliced ​​by the L-shaped steel plate and the transverse plate section of the U-shaped steel plate and another longitudinal plate section.

[0092] When the steel bar anchor box 2 is a double anchor box body, the second side plate 2a.2 and the second side plate 2a.2 are both made of two L-shaped steel plates spliced ​​together. During construction, the reinforced connecting steel plate 9 is first welded to the side of the frame column 1 by groove welding; the L-shaped steel plates of the two second side plates 2a.2 are also groove welded, and are respectively welded on both sides of the reinforced connecting steel plate 9; one side vertical edge of the L-shaped steel plate of the second side plate 2a.2 is welded to the side of the frame column 1, and the other vertical edge of the L-shaped steel plate of the second side plate 2a.2 is welded to the reinforced connecting steel plate 9; the L-shaped steel plates of the two third side plates 2b.2 are also groove welded, and are respectively welded on both sides of the reinforced connecting steel plate 9; one side vertical edge of the L-shaped steel plate of the third side plate 2b.2 is welded to the second side plate 2a.2, and the other vertical edge of the L-shaped steel plate of the third side plate 2b.2 is welded to the reinforced connecting steel plate 9.

[0093] When the steel bar anchor box 2 is a double anchor box body, the main anchor box body 2a provided with a reinforced connecting steel plate 9 can also be spliced ​​by a U-shaped steel plate and an L-shaped steel plate; wherein, the two ends of the U-shaped steel plate are respectively welded to the frame column 1 by groove welding, one end of the L-shaped steel plate is welded to the frame column 1 by groove welding, and the other end of the L-shaped steel plate is welded to the U-shaped steel plate by groove welding; in the main anchor box body 2a, the reinforced connecting steel plate 9 is the longitudinal plate section of the U-shaped steel plate close to one side of the L-shaped steel plate, and the second side plate 2a.2 is spliced ​​by the L-shaped steel plate and the transverse plate section of the U-shaped steel plate and another longitudinal plate section.

[0094] The additional anchor box 2b provided with a reinforced connecting steel plate 9 can also be spliced ​​together by a U-shaped steel plate and an L-shaped steel plate; wherein, the two ends of the U-shaped steel plate are respectively welded to the main anchor box 2a by groove welding, one end of the L-shaped steel plate is welded to the main anchor box 2a by groove welding, and the other end of the L-shaped steel plate is welded to the U-shaped steel plate by groove welding; in the structure of the additional anchor box 2b, the reinforced connecting steel plate 9 is the longitudinal plate section of the U-shaped steel plate close to one side of the L-shaped steel plate, and the third side plate 2b.2 in the additional anchor box 2b is spliced ​​together by the L-shaped steel plate and the transverse plate section and another longitudinal plate section of the U-shaped steel plate.

[0095] In this embodiment, the steel bar anchor box 2 is prefabricated in a factory; the steel bar anchor box 2 is connected to the frame column 1 by welding.

[0096] In this embodiment, the high-strength ductility mortar 5 is a fast-hardening, non-shrinkage grouting material with good construction workability, adhesion and high strength. During construction, special grouting equipment is used to pour the high-strength ductility mortar 5 into the steel bar anchor box 2 using the pressure grouting method, and the upper longitudinal reinforcement 3.1 of the connecting beam is connected to the steel bar anchor box 2 by relying on the bonding and biting effect between the materials.

[0097] The above embodiments are not an exhaustive list of specific implementation manners, and there may be other embodiments. The purpose of the above embodiments is to illustrate the present invention, rather than limiting the protection scope of the present invention. All applications obtained by simple changes of the present invention fall within the protection scope of the present invention.

Claims

1. A connecting structure between a frame column and a reinforced concrete beam, comprising a frame column (1) and a reinforced concrete beam (3); the reinforced concrete beam (3) comprises a beam steel bar framework composed of upper longitudinal bars (3.1) of the beam, lower longitudinal bars (3.2) of the beam, and stirrups (3.3), and beam concrete (3.4); characterized in that: On the side of the frame column (1) close to the reinforced concrete beam (3), at the upper position corresponding to the reinforced concrete beam (3), a steel bar anchorage box (2) is provided; the steel bar anchorage box (2) is located below the upper longitudinal bars (3.1) of the beam, and a socket (4) for inserting steel bars is provided at the top of the steel bar anchorage box (2); one end of the upper longitudinal bars (3.1) of the beam close to the frame column (1) is bent downward by 90° to form an insertion section (3.1.1); the insertion section (3.1.1) is inserted into the steel bar anchorage box (2), and the insertion depth is not less than 8 times the nominal diameter of the upper longitudinal bars (3.1) of the beam; the steel bar anchorage box (2) is filled with high-strength ductile mortar (5); on the side of the frame column (1) close to the reinforced concrete beam (3), at the position corresponding to the lower longitudinal bars (3.2) of the beam, a connector (6) is provided; the lower longitudinal bars (3.2) of the beam are fixedly connected to the connector (6); the beam concrete (3.4) is poured outside the beam steel bar skeleton; The upper longitudinal bars (3.1) of the beam are arranged in one row or in upper and lower two rows; When the upper longitudinal bars (3.1) of the beam are arranged in one row, the steel bar anchorage box (2) is a single anchorage box body; the steel bar anchorage box (2) includes a first bottom plate (2.1) and a first side plate (2.2); the horizontal section of the first side plate (2.2) is U-shaped, and both ends of the first side plate (2.2) are welded to the frame column (1) by bevel welding; the height of the first side plate (2.2) is not less than 10d; the width of the first side plate (2.2) is not greater than 2.5d, and the difference between the width of the first side plate (2.2) and the d of the upper longitudinal bars (3.1) of the beam is not less than 15 mm; the first bottom plate (2.1) seals the bottom of the space enclosed by the first side plate (2.2) and the frame column (1); d is the nominal diameter of the upper longitudinal bars (3.1) of the beam; When the upper longitudinal bars (3.1) of the beam are arranged in two rows, the steel bar anchorage box (2) is a double anchorage box body, including a main anchorage box body (2a) and an additional anchorage box body (2b); the main anchorage box body (2a) includes a second bottom plate (2a.1) and a second side plate (2a.2); the horizontal section of the second side plate (2a.2) is U-shaped, and both ends of the second side plate (2a.2) are welded to the frame column (1) by bevel welding; the height of the second side plate (2a.2) is not less than 12d; the width of the second side plate (2a.2) is not greater than 2.5d, and the difference between the width of the second side plate (2a.2) and the d of the upper longitudinal bars (3.1) of the beam is not less than 15 mm; the second bottom plate (2a.1) seals the bottom of the space enclosed by the second side plate (2a.2) and the frame column (1); The additional anchorage box body (2b) includes a third bottom plate (2b.1) and a third side plate (2b.2); the horizontal section of the third side plate (2b.2) is U-shaped, and the two ends of the third side plate (2b.2) are respectively welded to the second side plate (2a.2) by bevel welding; the top of the third side plate (2b.2) is lower than the top of the second side plate (2a.2), and the bottom of the third side plate (2b.2) is flush with the bottom of the second side plate (2a.2); the height of the third side plate (2b.2) is not less than 10d; the width of the third side plate (2b.2) is not greater than 2.5d, and the difference between the width of the third side plate (2b.2) and d of the upper longitudinal reinforcement (3.1) of the beam is not less than 15 mm; the third bottom plate (2b.1) seals the bottom of the space enclosed by the third side plate (2b.2) and the second side plate (2a.2).

2. The connection structure between the frame column and the reinforced concrete beam according to claim 1, characterized in that: The frame column (1) is an H-shaped column or a concrete-filled steel tube column or a steel reinforced concrete column; When the frame column (1) is an H-shaped column, stiffening plates (7) are respectively arranged on both sides of the web of the frame column (1) at the positions corresponding to the upper longitudinal reinforcement (3.1) and the lower longitudinal reinforcement (3.2) of the beam; the two ends of the stiffening plate (7) are respectively welded to the two flange plates of the frame column (1).

3. The connection structure between the frame column and the reinforced concrete beam according to claim 1, characterized in that: The reinforced concrete beam (3) is a precast reinforced concrete beam or a cast-in-place reinforced concrete beam; When the reinforced concrete beam (3) is a precast reinforced concrete beam, there is a spacing between the beam concrete (3.4) of the precast reinforced concrete beam and the frame column (1); the end of the beam steel skeleton provided with the insertion section (3.1.1) extends beyond the end face of the beam concrete (3.4), and the upper longitudinal reinforcement (3.1) of the beam is correspondingly connected to the steel bar anchorage box (2), and the upper longitudinal reinforcement (3.1) of the beam is correspondingly connected to the connecting piece (6); the high-strength ductile mortar (5) is poured at the position between the beam concrete (3.4) and the frame column (1) to connect the beam concrete (3.4) and the frame column (1). When the reinforced concrete beam (3) is a cast-in-place reinforced concrete beam, the beam concrete (3.4) is cast in length on the outside of the steel bar skeleton, and the end face of the beam concrete (3.4) is connected to the frame column (1).

4. The connection structure between the frame column and the reinforced concrete beam according to claim 1, characterized in that: An enhanced connecting steel plate (9) is vertically arranged inside the steel bar anchorage box (2); one vertical side of the enhanced connecting steel plate (9) is welded to the frame column (1), and the other vertical side of the enhanced connecting steel plate (9) is connected to the steel bar anchorage box (2) or extends outside the steel bar anchorage box (2); stud bolts (8) are arranged at intervals on the outer surface of the steel bar anchorage box (2).

5. The connection structure of the frame column and the reinforced concrete beam according to claim 3, characterized in that: When the reinforced concrete beam (3) is a precast reinforced concrete beam, the connecting piece (6) is a supporting steel plate; the connecting piece (6) is arranged at the bottom of a group of lower longitudinal reinforcements (3.2) of the beam, and the end of the lower longitudinal reinforcement (3.2) of the beam is lapped on the supporting steel plate and welded to the supporting steel plate.

6. The connecting structure between the frame column and the reinforced concrete beam according to claim 3, wherein: When the reinforced concrete beam (3) is a cast-in-place reinforced concrete beam, the connecting piece (6) is an internal threaded sleeve or a supporting steel plate; When the connecting member (6) is an internal threaded sleeve, a group of internal threaded sleeves is provided, and a group of internal threaded sleeves is provided correspondingly to a row of beam lower longitudinal reinforcements (3.2); the beam lower longitudinal reinforcements (3.2) are correspondingly inserted into the internal threaded sleeves and are threadedly connected to the sleeves; When the connecting member (6) is a supporting steel plate, the supporting steel plate is arranged at the bottom of a group of beam lower longitudinal reinforcements (3.2); the ends of the beam lower longitudinal reinforcements (3.2) are laid on the supporting steel plate and are welded to the supporting steel plate.

7. A construction method of the connection structure between a frame column and a reinforced concrete beam according to any one of claims 1-6, characterized in that, The steps include: Step 1: providing a connecting piece (6) on the side surface of the frame column (1) close to the reinforced concrete beam (3) at a position corresponding to the lower longitudinal reinforcement (3.2) of the beam; Step 2, prefabricate the steel bar anchor box (2); Step three, connecting the steel bar anchor box (2) to the side surface of the frame column (1) close to the reinforced concrete beam (3), corresponding to the upper position of the reinforced concrete beam (3); Step 4: construct the reinforced concrete beam (3), and complete the connection between the upper longitudinal reinforcement (3.1) of the beam and the reinforcement anchor box (2) and the connection between the lower longitudinal reinforcement (3.2) of the beam and the connecting piece (6), thus completing the construction.

8. The construction method of the connection structure between the frame column and the reinforced concrete beam according to claim 7, characterized in that: When the reinforced concrete beam (3) is a precast reinforced concrete beam, a gap is left between the beam concrete (3.4) of the precast reinforced concrete beam and the frame column (1); the end of the splicing section (3.1.1) provided on the beam reinforcement skeleton protrudes beyond the end surface of the beam concrete (3.4); the specific method of step 4 is as follows: Step 1, hoisting the prefabricated reinforced concrete beam into place, so that the plug-in section (3.1.1) of the upper longitudinal reinforcement (3.1) of the beam is inserted into the reinforcement anchor box (2); Step 2, fixing and connecting the lower longitudinal reinforcement (3.2) of the beam to the connecting piece (6); Step 3, supporting the formwork and pouring the high-strength ductility mortar (5) between the beam concrete (3.4) and the frame column (1): first fill the high-strength ductility mortar (5) in the steel bar anchor box (2), and then pour the high-strength ductility mortar (5) outside the steel bar anchor box (2), and the construction is completed.

9. The construction method of the connection structure between the frame column and the reinforced concrete beam according to claim 7, characterized in that: When the reinforced concrete beam (3) is a cast-in-place reinforced concrete beam, the specific method of step 4 is as follows: Step 1, arranging the upper longitudinal reinforcement (3.1) of the beam, and bending one end of the upper longitudinal reinforcement (3.1) of the beam close to the frame column (1) downward by 90 degrees to form a plug-in section (3.1.1); Step 2, inserting the splicing section (3.1.1) into the steel bar anchor box (2) accordingly; Step 3, tying some stirrups (3.3) near the beam-column joint to fix the relative position of a group of upper longitudinal reinforcements (3.1) of the beam; Step 4, pouring high-strength ductility mortar (5) into the steel bar anchor box (2); Step 5, passing the lower longitudinal reinforcement (3.2) of the beam through the stirrups (3.3) near the tied beam-column node, and connecting one end of the lower longitudinal reinforcement (3.2) of the beam close to the frame column (1) to the connector (6); Step 6: Support the formwork and pour the beam concrete (3.4), and the construction is completed.

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