Longitudinal bar anchoring structure used when secondary beam is placed at cantilever beam end
By designing a specific longitudinal reinforcement anchorage structure at the end of the cantilever beam, including a combination of edge longitudinal, transverse, longitudinal, and diagonal reinforcement and bracing, the problems of steel bar slippage and concrete cracking caused by improper longitudinal reinforcement anchorage are solved, thereby improving the stability and durability of the structure and reducing maintenance costs.
Patent Information
- Application Number
- CN202520351225.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-03
AI Technical Summary
When a secondary beam is placed at the end of a cantilever beam, improper anchorage of the longitudinal reinforcement can lead to insufficient bond between the reinforcement and the concrete, which may cause problems such as reinforcement slippage and concrete cracking, affecting the load-bearing capacity and durability of the structure.
Design a longitudinal reinforcement anchorage structure for a cantilever beam with a secondary beam resting at the end, including a combination of two side longitudinal, transverse and longitudinal steel bars, inclined diagonal bars and duck bars, and the arrangement of these steel bars enhances the anchorage effect of the longitudinal reinforcement in the cantilever beam.
It improves the anchorage effect of steel bars, enhances the tensile and bending properties of the structure, improves the stability and durability of the structure, reduces maintenance and repair work, and lowers long-term maintenance costs.
Smart Images
Figure CN223907759U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to civil engineering technical field, concretely relates to a longitudinal reinforcement anchoring structure when cantilever beam end has secondary beam to rest. BACKGROUND
[0002] Cantilever beam is more common in building structure, one end is fixed on the main structure, the other end is free overhanging, is often used in balcony, rain awning, eave etc. When cantilever beam end has secondary beam to rest, this structure form is widely used in practical engineering, for example, in the floor structure of some multistory building, in order to meet the demand of building function, often rest secondary beam at cantilever beam end to increase the utilization of space and the integrity of structure. Longitudinal reinforcement as the important stress reinforcement of cantilever beam and secondary beam, its anchoring effect is directly related to the safety and stability of structure. If longitudinal reinforcement is anchored improperly, under the action of load, it can cause the insufficient adhesion between steel bar and concrete, steel bar slip, concrete cracking etc. Problem, and then influence the bearing capacity and durability of the whole structure. The traditional longitudinal reinforcement anchoring mode when cantilever beam end has secondary beam to rest has some problems. One common practice is to set transverse groove at the main beam connection, the end of secondary beam is set on the groove, the connection of main beam and secondary beam is realized through cast-in-situ main beam groove area concrete, the construction speed of this node is fast, but the groove of prefabricated main beam causes local weakness of component, makes the prefabricated main beam easy to break, crack etc. Quality problem when hoisting or transporting. SUMMARY
[0003] The utility model aims at overcoming the insufficient of prior art, provides a longitudinal reinforcement anchoring structure when cantilever beam end has secondary beam to rest, to solve the improper longitudinal reinforcement anchoring, under the action of load, can cause the insufficient adhesion between steel bar and concrete, steel bar slip, concrete cracking etc. Problem.
[0004] In order to realize the above-mentioned purpose, design a longitudinal reinforcement anchoring structure when cantilever beam end has secondary beam to rest, including
[0005] Two edge verticals, the two edge verticals are arranged in the cantilever beam, and each edge vertical includes
[0006] The first horizontal muscle is horizontally arranged at the top of the cantilever beam,
[0007] The longitudinal muscle is vertically arranged at one end of the cantilever beam, and the top end of the longitudinal muscle is connected with the first horizontal muscle,
[0008] The inclined muscle is obliquely arranged in the inner side of the longitudinal muscle, the bottom end of the longitudinal muscle is connected with the bottom end of the inclined muscle, and the included angle between the inclined muscle and the bottom of the cantilever beam is α.
[0009] A plurality of duck muscles are arranged in the cantilever beam at the cooperation position with the secondary beam resting position, and the duck muscle is in the shape of isosceles trapezoid, and the bottom angle of the isosceles trapezoid is α.
[0010] Preferably, the cantilever beam end height is less than or equal to 800, the cantilever beam bottom angle and the duck muscle bottom angle are both 45°.
[0011] Preferably, the cantilever beam end height is greater than 800, the cantilever beam bottom angle and the duck muscle bottom angle are both 60°.
[0012] Preferably, the edge is longitudinally provided with a second horizontal muscle, the second horizontal muscle is transversely provided and connected with one end of the inclined muscle top, and the duck muscle bottom is provided with a transversely provided extension section on both sides, and the length of each extension section is half the length of the edge longitudinal second horizontal muscle.
[0013] Compared with the prior art, the utility model has the advantages that:
[0014] The longitudinal muscle anchoring structure provided by the utility model when the cantilever beam end has a secondary beam resting makes the steel bar be better anchored in the cantilever beam when the steel bar is stressed, enhances the tensile property and the bending property of the structure, improves the stability and durability of the structure, further reduces the maintenance and repair work caused by the structural problems, and reduces the long-term maintenance cost. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 , is a cantilever beam support steel bar structure and a longitudinal muscle anchoring structure schematic view when the cantilever beam end has a secondary beam resting.
[0016] In the drawing: 1, cantilever beam; 2, edge longitudinal; 3, first horizontal muscle; 4, longitudinal muscle; 5, inclined muscle; 6, duck muscle; 7, secondary beam; 8, second horizontal muscle; 9, extension section. DETAILED DESCRIPTION
[0017] In order to make the purpose, principle and structure of the utility model more clear and explicit, the following is further described in combination with the drawings and specific embodiments.
[0018] Referring to Figure 1The embodiment provides a longitudinal reinforcement anchoring structure when a cantilever beam end has a secondary beam, which comprises two edge longitudes 2 arranged in a cantilever beam 1, the cantilever beam 1 is horizontally provided with a first horizontal reinforcement 3 at the top and a second horizontal reinforcement 8 at the bottom, and the right end of the cantilever beam 1 is vertically provided with two longitudinal reinforcements 4, the top of the two longitudinal reinforcements 4 is connected with the first horizontal reinforcement 3, and the bottom of the two longitudinal reinforcements 4 is connected with the second horizontal reinforcement 8, an inclined reinforcement 5 is arranged on the inner side of the longitudinal reinforcement 4, the angle between the inclined reinforcement 5 and the bottom of the cantilever beam 1 is α, one end of the bottom of the longitudinal reinforcement 4 is connected with one end of the bottom of the inclined reinforcement 5, a duck reinforcement 6 is arranged at the position matched with the secondary beam 7 in the cantilever beam 1, when the end height of the cantilever beam 1 is less than or equal to 800, the angle of the bottom of the cantilever beam 1 and the bottom angle of the duck reinforcement 6 are both 45°, when the end height of the cantilever beam 1 is greater than 800, the angle of the bottom of the cantilever beam 1 and the bottom angle of the duck reinforcement 6 are both 60°, the second horizontal reinforcement 8 is connected with one end of the top of the inclined reinforcement 5, and the bottom of the duck reinforcement 6 is provided with horizontally arranged extension sections 9 on both sides, and the length of each extension section 9 is half of the length of the second horizontal reinforcement 8 of the edge longitude 2.
[0019] The above merely describes the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and novel concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A longitudinal reinforcement anchoring structure for a cantilever beam having a secondary beam resting on the end of the cantilever beam, characterized by Comprising two edge longitudinal, the two edge longitudinal set in the cantilever beam, each edge longitudinal comprises first transverse rib transversely arranged on the top of the cantilever beam, longitudinal rib longitudinally arranged on one end of the cantilever beam, one end of the top of the longitudinal rib is connected with the first transverse rib, oblique rib obliquely arranged inside the longitudinal rib, one end of the bottom of the longitudinal rib is connected with one end of the bottom of the oblique rib, the angle between the oblique rib and the bottom of the cantilever beam is α; a plurality of batten, the batten is arranged in the cantilever beam and the matching position of the secondary beam, the batten is isosceles trapezoid, the bottom angle of the isosceles trapezoid is α.
2. The cantilever beam end with secondary beam resting longitudinal reinforcement anchorage structure according to claim 1, characterized in that The height of the cantilever beam end is less than or equal to 800mm, the angle of the bottom of the cantilever beam and the bottom angle of the batten are both 45°.
3. The anchoring structure for longitudinal reinforcement bars when cantilever beam ends are rested on secondary beams according to claim 1, characterized in that The height of the cantilever beam end is greater than 800mm, the angle of the bottom of the cantilever beam and the bottom angle of the batten are both 60°.
4. The cantilever beam end with secondary beam resting longitudinal reinforcement anchorage structure according to claim 1, characterized in that It also includes a second transverse rib, which is transversely arranged and connected with one end of the top of the oblique rib, and the bottom of the batten is provided with a transversely arranged extension on both sides, the length of each extension is half the length of the second transverse rib of the edge longitudinal.