Standardized joint construction method for connection and anchorage of horizontal and longitudinal steel bars of precast beams

Abstract

The invention discloses a standardized joint construction method for connection and anchorage of horizontal and longitudinal steel bars of precast beams. At present, the design and manufacturing production of precast laminated beam members, the structure design of connection and anchorage of steel bars at cast-in-situ joints of precast laminated beams and the construction of accessories and the precast laminated beam members cannot be standardized, generalized and socialized. The standardized joint construction method for the connection and anchorage of the horizontal and longitudinal steel bars of the precast beams comprises the steps that the section sizes of precast laminated beams and columns and the arrangement of reinforcing bars are standardized, treatment of the length and end heads of exposed steel bars is standardized, and a standardized connecting method of a straight half-grouting sleeve provided with an integrated nut bolt is adopted for the connection of longitudinal steel bars of the precast columns of column joints in cast-in-place; and the panel of arrangement of longitudinal steel bars of columns with fabricated structures is standardized at the cast-in-place joints of the precast beams and vertical members, and a standardized construction method for the connection and anchorage of the steel bars is provided. According to the standardized joint construction method for the connection and anchorage of the horizontal and longitudinal steel bars of the precast beams, the standardization, generalization and socialization of the precast laminated beams and columns of a fabricated structure and the construction of the connection and anchorage of the longitudinal steel bars of the precast beams in the cast-in-place joint of a shear wall are achieved.

Description

technical field [0001] The invention relates to prefabricated composite beams of prefabricated buildings, in particular to a standardized node construction method for connecting and anchoring horizontal and longitudinal steel bars of prefabricated beams. Background technique [0002] The development of prefabricated buildings is a major change in the way of construction, which is conducive to saving resources and energy, reducing construction environmental pollution, improving labor production efficiency and quality and safety levels, and is conducive to promoting the deep integration of the construction industry and informatization industrialization, and cultivating new industries and new kinetic energy. Promote the resolution of excess capacity. At present, it is necessary to accelerate the establishment of a standard system for the design, construction, and production of parts and components to promote the industrialization of construction, accelerate the development of s...

AI Technical Summary

Problems solved by technology

[0003] Reinforced concrete building structure is the building type with the largest market share. Reinforced concrete frame structure is often used in high-rise buildings and multi-storey buildings. Slow progress, the promotion and application of assembled monolithic concrete structures have encountered bottlenecks

Prefabricated concrete beams are structural components often used in assembled monolithic concrete structures. At the assembly nodes of prefabricated beams and vertical components, the structural design and construction of the connection and anchorage of the longitudinal reinforcement of prefabricated beams are currently carried out manually. The deepening and splitting design is completed. As a result of this second deepening design, firstly, the section of the precast beam, the layout of the longitudinal reinforcement of the precast beam, and the design of the exposed length of the longitudinal reinforcement are all individualized and non-standardized, resulting in the non-standardization and universality of the production of prefabricated beams. Second, at the prefabricated beam-column middle column joint, if the longitudinal reinforcement of the prefabricated beam on both sides of the column is anchored in the cast-in-place core area of ​​the middle column joint, that is, the prefabricated beam reinforcement on both sides of the column is anchored in dislocation, there is often a steel bar spacing For quality defects that cannot meet the requirements of the code, in order to ensure the effective spacing of the dislocated longitudinal reinforcement, it is necessary to widen the section width of the prefabricated beams and columns, which is poor in practicability and increases the cost of the structure. At the beam-column center column joint, if the horizontal longitudinal reinforcement of the prefabricated beam adopts the mechanical connection method, the current connection design can only use the full-grouting connection sleeve with too large length, and the determination of the length of the longitudinal reinforcement and the positioning connection design are also individualized. Non-standardization also results in increased requirements for column section length, poor practicability, and high connection costs, making it difficult to popularize prefabricated beam-column cast-in-place joint reinforcement connection technology; At the cast-in-place node of the force wall, when the longitudinal reinforcement of the prefabricated beam needs to be anchored, the second deepening of the structural design and the application of the anchorage are also individualized and non-standardized.

The above problems lead to the design and production of prefabricated composite beam components, the structural design and accessories of steel bar connection and anchorage at the cast-in-place joints of prefabricated composite beams, and the assembly and construction of prefabricated composite beam components.

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