Novel assembly type rigid connection structure for reinforced concrete primary and secondary beams

Abstract

A novel assembly type reinforced concrete primary and secondary beam rigid connection structure comprises a prefabricated main beam, a prefabricated secondary beam, a U-shaped gasket and a stirrup which are connected together through post-cast high-strength concrete to form the assembly type reinforced concrete primary and secondary beam rigid connection structure. The prefabricated main beam comprises a pre-buried double-steel corbel, a pre-buried secondary beam longitudinal lap joint steel bar and a short secondary beam. The pre-buried double-steel corbel comprises a connecting anchor bar, buried iron, a buried iron shear key and a short steel plate. The prefabricated secondary beam comprises reserved longitudinal lap joint steel bars extending out of the secondary beam and a pre-embedded inverted bracket, and the pre-embedded inverted bracket comprises a stud and a shaped steel member; the U-shaped gasket is located between the short steel plate and the section steel member. The torsional moment and torsional displacement of the prefabricated main beam are reduced when the prefabricated secondary beam is installed by reducing the supporting force arm of the prefabricated main beam, and then the installation precision of the main beam and the secondary beam is improved. The accuracy of the template positioning and connecting structure is improved through the short secondary beams; the adverse effect on the continuity of main beam concrete due to the fact that the main steel framework transversely penetrates through the main beam in the prior art is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of assembly type reinforced concrete main beam and secondary beam connection, in particular to a novel assembly type reinforced concrete main beam and secondary beam rigid connection structure. BACKGROUND

[0002] China is vigorously promoting the construction of assembly type reinforced concrete buildings, and the assembly type reinforced concrete main beam and secondary beam rigid connection is one of the key technologies of the construction of assembly type reinforced concrete buildings.

[0003] CN222044451U discloses a kind of assembly type reinforced concrete main beam and secondary beam rigid connection structure, fills up the blank of assembly type reinforced concrete main beam and secondary beam rigid connection schematic diagram in " assembly type reinforced concrete building technical standard " assembly type reinforced concrete main beam connection.

[0004] It is found that the pre-buried cantilever steel skeleton has a large cantilever length in the implementation of the assembly type reinforced concrete main beam and secondary beam rigid connection structure, which causes a large torque of the main beam during the installation of the secondary beam in the assembly type reinforced concrete main beam and secondary beam rigid connection structure, further causing a large torsional displacement of the main beam during the installation of the main beam in the assembly type reinforced concrete main beam and secondary beam rigid connection structure; meanwhile, the pre-buried cantilever steel skeleton crossing the main beam is also not conducive to the continuity of the main beam concrete; the pre-buried cantilever steel structure on the main beam cannot cause the automatic return of the gravity center below the support of the secondary beam pre-buried cantilever steel structure, and the stability of the secondary beam during installation exists construction safety risk. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems, overcomes the defects of the prior art that the pre-buried cantilever steel skeleton crossing the main beam is not conducive to the continuity of the main beam concrete; the pre-buried cantilever steel skeleton has a large cantilever length, which causes a large torque of the main beam during the installation of the secondary beam in the assembly type reinforced concrete main beam and secondary beam rigid connection structure, and causes a large torsional displacement of the main beam during the installation of the main beam in the assembly type reinforced concrete main beam and secondary beam rigid connection structure, and provides a novel assembly type reinforced concrete main beam and secondary beam rigid connection structure.

[0006] The utility model solves the technical problems by adopting the technical scheme of a novel assembly type reinforced concrete main beam and secondary beam rigid connection structure, which comprises a prefabricated main beam, a prefabricated secondary beam, a U-shaped gasket, a stirrup and high-strength concrete, and the prefabricated main beam, the prefabricated secondary beam, the U-shaped gasket and the stirrup are solidified together by pouring the high-strength concrete to form the assembly type reinforced concrete main beam and secondary beam rigid connection structure.

[0007] The prefabricated main beam comprises a pre-buried double-steel corbel, a pre-buried secondary beam longitudinal lap steel bar and a short secondary beam, the pre-buried double-steel corbel comprises a connecting anchor, a buried iron, a buried iron shear key and a short steel plate.

[0008] The two prefabricated secondary beams are symmetrically arranged on both sides of the prefabricated main beam, and the prefabricated secondary beam comprises reserved longitudinal laping steel bars of the secondary beam, embedded shaped inverted hangers, the embedded shaped inverted hangers comprise studs and shaped steel members; and the shaped steel members have openings in the middle of the top thereof;

[0009] The U-shaped gaskets are arranged between the short steel plates and the shaped steel members, and the stirrups are arranged outside the embedded longitudinal laping steel bars of the secondary beam and the reserved longitudinal laping steel bars of the secondary beam and wrap the two together.

[0010] Further, the embedded double-steel hangers are composed of a plurality of connecting anchor bars, two embedded irons, two embedded iron shear keys and four short steel plates through welding connection, and the short secondary beams are used for fixing the formwork.

[0011] Further, the embedded shaped inverted hangers are composed of a plurality of studs and one shaped steel member, and the embedded shaped inverted hangers have openings in the middle of the top thereof, the shaped steel members are welded and connected with the studs to form the embedded shaped inverted hangers.

[0012] Further, the embedded shaped inverted hangers, the reserved longitudinal laping steel bars of the secondary beam and the steel bars of the secondary beam are poured with concrete after being positioned and molded to form the prefabricated secondary beam.

[0013] Further, the formwork comprises customized detachable aluminum formworks, formwork buckles and formwork supporting pads, and the aluminum formworks are fixed on both sides and the bottom of the short secondary beams and the prefabricated secondary beams through the formwork buckles and the formwork supporting pads.

[0014] Further, the embedded double-steel hangers and the embedded longitudinal laping steel bars of the secondary beam are simultaneously projected on both sides and connected with the prefabricated secondary beams on both sides.

[0015] The utility model has the following beneficial technical effects:

[0016] 1. The small overhanging length of the main beam embedded double-steel hanger replaces the large overhanging length of the embedded overhanging steel skeleton, reduces the torque of the prefabricated main beam when the prefabricated secondary beam is installed in the prefabricated reinforced concrete main-secondary beam rigid connection structure, reduces the torsional displacement of the prefabricated main beam when the prefabricated secondary beam is installed in the prefabricated reinforced concrete main-secondary beam rigid connection structure, and further improves the installation precision.

[0017] 2. By replacing the pre-embedded cantilevered steel frame with pre-embedded double steel bracket connecting anchor bars, the L-shaped main steel frame that crosses the main beam is avoided, thus avoiding the adverse effect of the rigid connection structure between the main and secondary beams on the continuity of the main beam concrete caused by the main steel frame crossing the main beam. In addition, the short secondary beams extending from the precast main beam facilitate the installation and positioning of the formwork, improving the accuracy and quality of the project.

[0018] 3. By improving the support for the cantilevered steel structure embedded in the main beam to the lower support for the cantilevered steel structure embedded in the secondary beam, the method is to embed double steel brackets on the precast main beam to the precast secondary beam. The upper support of the inverted corbel ensures that the center of gravity of the precast secondary beam is below the support. When the precast secondary beam encounters a small accidental eccentricity, it can automatically return to its original position under the action of gravity, which improves the stability of the precast secondary beam during installation, thereby reducing construction safety risks and ensuring the normal installation of the secondary beam. Attached Figure Description

[0019] Figure 1 This is a front view of an embodiment of a novel prefabricated reinforced concrete main and secondary beam rigid connection structure of this utility model;

[0020] Figure 2 yes Figure 1 Schematic diagram of the AA section;

[0021] Figure 3 yes Figure 2 Schematic diagram of the BB cross section;

[0022] Figure 4 yes Figure 2 Schematic diagram of the CC section;

[0023] Figure 5 yes Figure 2 Schematic diagram of the DD section;

[0024] Figure 6 yes Figure 2 Schematic diagram of pre-embedded double steel bracket 11;

[0025] Figure 7 yes Figure 2 Pre-embedded Schematic diagram of the inverted cow leg shape 6;

[0026] Figure 8 yes Figure 3 Schematic diagram of pre-embedded double steel bracket 11;

[0027] Figure 9 yes Figure 3 Pre-embedded Schematic diagram of the inverted cow leg shape 6;

[0028] Figure 10 yes Figure 4 Pre-embedded Schematic diagram of the inverted cow leg shape 6;

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, main beam and secondary beam rigid connection structure; 2, prefabricated main beam; 3, prefabricated secondary beam; 4, stirrup; 5, aluminum formwork; 6, pre-buried shaped inverted bracket; 7, pre-buried secondary beam longitudinal lap steel bar; 8, U-shaped spacer; 9, shaped steel member; 10, stud; 11, pre-buried double steel bracket; 12, connecting anchor; 13, pre-buried secondary beam longitudinal lap steel bar; 14, short secondary beam; 15, short steel plate; 16, embedded iron; 17, embedded iron shear key; 18, formwork buckle; 19, formwork support pad; 20, formwork; 21, opening. DETAILED DESCRIPTION

[0031] The utility model will be further described in detail below in combination with the drawings and examples.

[0032] Referring to Figure 1 , Figure 2 and Figure 4 , the embodiment includes prefabricated main beam 2, prefabricated secondary beam 3, U-shaped spacer 8, stirrup 4, formwork 20, and the prefabricated main beam 2, prefabricated secondary beam 3, U-shaped spacer 8, stirrup 4 and the like are solidified together by pouring the high-strength concrete to form the prefabricated main beam 2, prefabricated secondary beam 3, U-shaped spacer 8, stirrup 4 and the like. Assembly type reinforced concrete main and secondary beam rigid connection structure 1, in addition, the U-shaped spacer 8 is a U-shaped spacer 8 with different thicknesses.

[0033] Specifically, the prefabricated main beam 2 is vertically arranged, the prefabricated secondary beam 3 is provided with two and symmetrically installed on both sides of the prefabricated main beam 2, and the U-shaped spacer 8, the stirrup 4 and the formwork 20 are all connected on the prefabricated main beam 2 and the prefabricated secondary beam 3.

[0034] Referring to Figure 2 , Figure 3 , Figure 6 , Figure 8 and Figure 10 , the prefabricated main beam 2 includes pre-buried double steel bracket 11, pre-buried secondary beam longitudinal lap steel bar 7 and short secondary beam 14, and the short secondary beam 14 is a part protruding from both sides of the prefabricated main beam 2 and used for fixing the formwork 20; the pre-buried double steel bracket 11 includes connecting anchor 12, embedded iron 16, embedded iron shear key 17 and short steel plate 15, wherein the short steel plate 15 is vertically cantilevered, and specifically, the pre-buried double steel bracket 11 is composed of multiple connecting anchors 12, two embedded irons 16, two embedded iron shear keys 17 and four short steel plates 15 by welding connection, the embedded iron 16 is arranged at both ends of the connecting anchor 12, the two embedded iron shear keys 17 and the four short steel plates 15 are arranged on the embedded iron 16, the embedded iron shear keys 17 are oppositely arranged, and the short steel plates 15 are oppositely arranged.

[0035] Referring to Figure 2 , Figure 3 ,Figure 4 , Figure 5 , Figure 7 and Figure 9 The precast secondary beam 3 includes 13 longitudinal lapped steel bars extending from the secondary beam and pre-embedded... Shaped like an inverted corbel, grade 6; pre-embedded The inverted corbel 6 consists of multiple studs 10 and one It consists of 9 steel components. The top surface of the 9-shaped steel component has a central hole 21. Steel component 9 is welded to stud 10 as required to form a pre-embedded structure. 6. Shaped like an inverted cow leg; pre-embedded 6. The precast secondary beam is formed by positioning and molding the secondary beam reinforcement, and then pouring concrete to form the precast secondary beam.

[0036] Reference Figure 2 , Figure 5 The pre-embedded longitudinal lapped steel bars 7 and the reserved extended longitudinal lapped steel bars 13 of the secondary beam are arranged parallel to each other and are wrapped together on the outside by stirrups 4. The pre-embedded double steel brackets 11 and the pre-embedded longitudinal lapped steel bars 7 of the secondary beam extend out from both sides and are connected to the precast secondary beams 3 on both sides.

[0037] Reference Figure 2 , Figure 4 The template 20 includes a custom detachable aluminum template 5, template clips 18, and template supports 19, etc. The detachable aluminum template 5 is installed and fixed on the precast main beam 2 through template clips 18 and template supports 19, extending to the sides and bottom of the short secondary beam 14 and the precast secondary beam 3.

[0038] The implementation principle of a novel prefabricated reinforced concrete main and secondary beam rigid connection structure 1 in this embodiment of the utility model is as follows:

[0039] By replacing the large cantilever length of the pre-embedded cantilever steel frame with the small cantilever length of the pre-embedded double steel bracket 11 in the main beam, the torque of the precast main beam 2 during the installation of the precast secondary beam 3 in the precast reinforced concrete main and secondary beam rigid connection structure 1 is reduced, the torsional displacement of the precast main beam 2 during the installation of the precast secondary beam 3 in the precast reinforced concrete main and secondary beam rigid connection structure 1 is reduced, and the installation accuracy is improved.

[0040] The pre-embedded double steel bracket 11 is replaced by the connecting anchor bar 12. The L-shaped main steel frame of the inverted corbel 6 runs across the main beam, avoiding the adverse effects of the rigid connection structure 1 of the main and secondary beams on the continuity of the main beam concrete. The short secondary beam 14 extending from the precast main beam 3 facilitates the installation and positioning of the formwork 20, improving the accuracy and quality of the project.

[0041] The lower support of the cantilever steel structure of the secondary beam to the cantilever steel structure pre-buried on the primary beam is improved to the upper support of the pre-buried double steel corbel 11 of the precast primary beam 2 to the pre-buried The center of gravity of the precast secondary beam 3 is below the support, and the precast secondary beam 3 can automatically return under the action of gravity after encountering a small accidental eccentricity, thereby improving the stability of the precast secondary beam 3 during installation and reducing the construction safety risk, and ensuring the normal installation of the secondary beam.

[0042] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Among them, the same parts are indicated by the same reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "in" and "out" refer to the directions towards or away from the geometric center of a particular component. Therefore: all equivalent changes made in accordance with the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A novel prefabricated reinforced concrete primary and secondary beam rigid connection structure, characterized in that, It includes a precast main beam (2), a precast secondary beam (3), a U-shaped gasket (8), stirrups (4) and high-strength concrete. The precast main beam (2), the precast secondary beam (3), the U-shaped gasket (8) and the stirrups (4) are solidified together by pouring high-strength concrete to form a precast reinforced concrete main and secondary beam rigid connection structure (1). The precast main beam (2) includes a pre-embedded double steel bracket (11), a pre-embedded secondary beam longitudinal lapped steel bar (7) and a short secondary beam (14). The pre-embedded double steel bracket (11) includes a connecting anchor bar (12), an embedded iron (16), an embedded iron shear key (17) and a short steel plate (15). Two precast secondary beams (3) are provided and symmetrically installed on both sides of the precast main beam (2). The precast secondary beams (3) include reserved longitudinal lapped steel bars (13) extending out of the secondary beam and pre-embedded... The inverted cow leg (6), the pre-embedded The inverted cow leg (6) includes a stud (10) and Steel structural member (9), and the aforementioned The top center of the steel member (9) has an opening (21); The U-shaped gasket (8) is located between the short steel plate (15) and the... Between the steel components (9), the stirrups (4) are located outside the pre-embedded secondary beam longitudinal lapped steel bars (7) and the reserved extended secondary beam longitudinal lapped steel bars (13) and wrap them together.

2. The novel prefabricated reinforced concrete primary and secondary beam rigid connection structure according to claim 1, characterized in that, The pre-embedded double steel bracket (11) is composed of multiple connecting anchor bars (12), two embedded irons (16), two embedded iron shear keys and four short steel plates (15) connected by welding, and the short secondary beam (14) is used to fix the template (20).

3. The novel prefabricated reinforced concrete primary and secondary beam rigid connection structure according to claim 1, characterized in that, The pre-embedded The inverted cow leg (6) consists of multiple studs (10) and one Composed of shaped steel components (9), and the aforementioned The steel member (9) has an opening (21) in the middle of its top. The steel component (9) is welded to the stud (10) as required to form a pre-embedded structure. Shaped like an upside-down cow leg (6).

4. A novel prefabricated reinforced concrete primary and secondary beam rigid connection structure according to claim 1, characterized in that, The pre-embedded The precast secondary beam (3) is formed by pouring concrete after positioning and molding of the inverted corbel (6), the reserved extended longitudinal lapped steel bars (13) of the secondary beam, and the steel bars of the secondary beam.

5. A novel prefabricated reinforced concrete primary and secondary beam rigid connection structure according to claim 1, characterized in that, It also includes a template (20), which includes a customized detachable aluminum template (5), template buckles (18) and template supports (19). The aluminum template (5) is installed and fixed on both sides and the bottom of the short secondary beam (14) and the precast secondary beam (3) by the template buckles (18) and template supports (19).

6. A novel prefabricated reinforced concrete primary and secondary beam rigid connection structure according to claim 1, characterized in that, The pre-embedded double steel bracket (11) and the pre-embedded secondary beam longitudinal lapped steel bars (7) extend out from both sides and connect with the precast secondary beams (3) on both sides.

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