Prefabricated ECC-RC combination beam column joint component

Abstract

The invention provides a prefabricated ECC-RC combination beam column joint component, wherein ECC refers to engineered cementitious composites, and RC refers to reinforced concrete. The prefabricated ECC-RC combination beam column joint component comprises a joint, an outward-extending column and an outward-extending beam, wherein the joint, the outward-extending beam and the outward-extending column are respectively composed of an ECC material, longitudinal bars and stirrups, the outward-extending length of the outward-extending column is about 1-2 times of the height of the column section, the outward-extending length of the outward-extending beam is about 1-2 times of the height of the beam section, H-shaped steel is embedded in the end of the outward-extending beam and the end of the outward-extending column, the embedded depth ranges from 10 cm to 20 cm, the H-shaped steel and the longitudinal bars extend out of the ends for 10-20 cm, the embedded part of the H-shaped steel is welded to the longitudinal bars, the embedded H-shaped steel of a prefabricated RC beam, the embedded H-shaped steel of a prefabricated RC column and the embedded H-shaped steel of the prefabricated ECC joint are connected through high-strength bolts, and the longitudinal bars are connected through a straight thread sleeve. According to the prefabricated ECC-RC combination beam column joint component, the prefabricated beam column joint component formed by pouring the steel bar reinforced ECC material is applied to an assembly type frame structure, compared with a general reinforced concrete joint component, 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; besides, the high tenacity of the ECC material can reduce residual deformation of the structure after an earthquake, and therefore 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 joint component of fiber cement-based composite material (ECC) reinforced by steel bars, which is applied to an assembled frame structure and replaces traditional reinforced concrete beam-column joints. Background technique [0002] The prefabricated concrete structure has the incomparable advantages of the cast-in-place concrete structure: ①The construction speed is fast and the labor productivity is improved; ②The construction is convenient, the on-site wet work is reduced, the construction environment is improved and the disturbance to the residents is reduced; ③The factory production of prefabricated components ensures high product quality Guaranteed; ④The prefabricated concrete structure can effectively control the deformation cracks of the concrete. [0003] Frame nodes are among the weakest and most vulnerable parts of a frame. Due to the sh...

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

The reinforced concrete joint area usually has dense stirrups, which makes the concrete construction difficult in the joint area, and it is easy to cause the concrete pouring in the joint area to be not dense, which affects the seismic performance of the structure

[0004] Reinforced concrete joints and beam-column ends 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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