Corner longitudinal reinforcement centralized and profiled bar built-in reinforcing structure of RC (Reinforced Concrete) rectangular column and preparation method thereof

Abstract

The invention relates to a corner longitudinal reinforcement centralized and profiled bar built-in reinforcing structure of an RC (Reinforced Concrete) rectangular column and a preparation method thereof, belonging to the field of earthquake resistance strengthening of RC columns. According to the corner longitudinal reinforcement centralized and profiled bar built-in reinforcing structure and the preparation method thereof, longitudinal reinforcements at the four corners of a cross section of an original rectangular column are centralized based on the form that reinforcements are distributed on the cross section of the original rectangular column, so as to form an isosceles-right-triangle delta-shaped longitudinal reinforcement distributed form, and reinforcing inequilateral angle irons of the four corners of the cross section of the rectangular column are fixed at the outer sides of the two ends of an initially-reinforced reinforcement cage through steel reinforcing rods. Due to the form, a good binding effect can be provided for concrete, and the concrete can be prevented from shedding too early under the action of oblique earthquakes. The method comprises the following specific operating steps: forming the reinforcement cage, mounting the angle irons and forming the reinforcing structure. The corner longitudinal reinforcement centralized and profiled bar built-in reinforcing structure and the preparation method thereof have the advantages that the condition that the RC square column is not subjected to bond failure under the action of the oblique earthquakes can be guaranteed on the premise that the condition that the structure is designed according to X and Y principal-axis directions is basically not changed, and the oblique bearing capacity, ductility and earthquake resistance of the column are improved greatly.

Description

technical field [0001] The invention relates to a multi-storey RC rectangular column whose four-corner longitudinal reinforcements are concentrated to form an isosceles right-angled triangle product-shaped reinforcement form, and a reinforced structure with built-in steel to improve the seismic performance of the RC rectangular column such as bearing capacity and ductility, and a preparation method, which belongs to reinforced concrete The seismic performance of the column is strengthened in the field. Background technique [0002] my country's "Code for Seismic Design of Buildings" (GB50011-2010) Article 5.1.1, Item 1 stipulates that in general, the horizontal seismic action should be calculated separately in at least the two main axis directions of the building structure, and the horizontal seismic action in each direction should be determined by the The directional lateral force member bears. However, earthquakes are sudden and uncertain, and the multi-dimensionality, ran...

AI Technical Summary

Problems solved by technology

The current design code only conducts separate seismic design along the two main axes and checks of "strong column and weak beam" at the joints, and does not consider the multi-dimensional nature of the ground motion input, especially the beams and columns around the joint when the ground motion is input obliquely. The change of the strength ratio may cause the structure designed according to the "strong column and weak beam" in the single direction of X (or Y) direction, but it cannot realize the design goal of "strong column and weak beam" under the action of oblique earthquake, resulting in Interstory collapse or overall collapse of the reinforced concrete frame structure

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