Prestressed prefabricated ECC-RC combination beam column joint component

Abstract

The invention relates to a prestressed prefabricated ECC-RC combination beam column joint component which comprises a prestressed rib and a joint with a bracket. The joint with the bracket is composed of an ECC material, longitudinal bars and stirrups. The joint with the bracket comprises an outward-extending column, wherein the length of the outward-extending column is about 1-2 times of the height of the column section. A hole channel is required to be reserved between the joint and a prefabricated RC beam connected with the joint. The prefabricated ECC joint is connected with the prefabricated RC beam through the post-tensioned prestressed rib which penetrates through the hole channel. H-shaped steel is embedded in the end of the outward-extending column and the end of a prefabricated RC column, wherein the embedded depth and the outward-extending length both range from 10 cm to 15 cm, the longitudinal bars at the end of the outward-extending column and the end of the prefabricated RC column respectively extend outwards by 10-15 cm, the embedded part of the H-shaped steel is welded to the longitudinal bars, the embedded H-shaped steel of the prefabricated RC column and the embedded H-shaped steel of the prefabricated joint are connected through high-strength bolts, and the longitudinal bars are connected through a straight thread sleeve. According to the prestressed prefabricated ECC-RC combination beam column joint component, the prestressed prefabricated joint component formed by pouring of the steel bar reinforced ECC material is applied to an assembly type frame structure, so that the ductility and the anti-seismic property of the structure are improved remarkably, the number of joint stirrups in use is reduced substantially, pouring is facilitated, and construction is convenient; since prestress is used as an assembly means, residual deformation of the structure after an earthquake can be reduced, the restorable function is achieved, and post-earthquake repair expenses are reduced.

Description

Technical field [0001] The invention belongs to the field of structural engineering, and relates to a prefabricated beam-column node component using reinforced fiber cement-based composite material (ECC) and prestressed tendons, which is applied to a fabricated frame structure to replace traditional reinforced concrete beam-column nodes. Background technique [0002] The prefabricated concrete structure has the incomparable advantages of the cast-in-place concrete structure: ①The construction speed is fast, which improves labor productivity; ②Convenient construction, reduces on-site wet work, improves the construction environment and reduces disturbance to the people; ③Factory production of precast components, product quality Guaranteed; ④The precast concrete structure can effectively control the deformation and cracks of the concrete. [0003] The frame node is one of the weakest and most vulnerable parts of the frame. Due to the shortcomings of low tensile strength and poor toug...

AI Technical Summary

Problems solved by technology

Due to the shortcomings of the concrete material itself, such as low tensile strength and poor toughness, the ductility and damage tolerance of concrete joints are low, which leads to large deformation of the structure and even structural damage under the action of earthquake load.

Even if no damage occurs, the interface splitting damage and peeling of the protective layer in the node area are serious, resulting in huge repair costs after the earthquake

[0004] Reinforced concrete joints and their surrounding areas bear large internal forces under earthquake action. In order to realize the seismic design concepts and requirements of "strong joints and weak members" and "strong shear and weak bending", these areas usually have dense stirrups, resulting in joints Concrete construction in the joint area is difficult, and it is easy to cause the concrete pouring in the joint area to be incomplete, which will affect the seismic performance of the structure

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