Self-reset concrete frame for strengthening existing column by enlarging section and implementation method of self-reset concrete frame

Abstract

The invention provides a self-reset concrete frame for strengthening an existing column by enlarging the section and an implementation method of the self-reset concrete frame, and relates to the fieldof civil engineering. The self-reset concrete frame for strengthening the existing column by enlarging the section and the implementation method of the self-reset concrete frame solve the problem that after an existing and general concrete frame is reinforced by enlarging the section, under a rare earthquake, large interlayer lateral movement, permanent residual deformation caused by the earthquake, structural damage caused by the earthquake, and non-structural member damage caused by excessively large interlayer lateral movement and permanent residual deformation are still likely occurring,and meanwhile, influence on an original using space after reinforcing is considered. The self-reset concrete frame comprises an expanding frame column, the expanding frame column is fixedly connectedto the side face of an existing frame column, and the expanding frame column and the existing frame column form a self-reset frame column; and hole channel through holes are formed in the expanding frame column in the height direction, prestressed bars are inserted and mounted in the hole channel through holes and are anchored at the upper end and the lower end of the expanding frame column. The implementation method comprises the steps that steel bars are arranged; the prestressed bars are arranged; pouring is conducted; the prestressed bars are tensioned; and grooving and grouting are conducted. The self-reset concrete frame for strengthening the existing column by enlarging the section and the implementation method of the self-reset concrete frame are used for building of the concrete frame.

Description

technical field [0001] The invention relates to a self-resetting concrete frame used in the field of civil engineering and an implementation method thereof, in particular to a self-resetting concrete frame with an enlarged section for strengthening existing columns and an implementation method thereof. Background technique [0002] At present, existing buildings are facing problems such as high-performance building functions and structural aging of existing buildings due to long-term use. If economic and social impacts cannot be demolished and rebuilt, reasonable reinforcement of existing buildings is required. For the concrete frame structures currently used in large quantities and widely used, reinforcement measures of increasing the concrete section can be adopted to increase the overall stiffness of the structure, change the stiffness ratio of the components, and improve the seismic capacity of the structure. However, this kind of post-seismic reinforcement measures aime...

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Problems solved by technology

[0003] The present invention aims to solve the problem that after strengthening the existing concrete frame with the conventional enlarged cross-section, there may still be relatively large layer-to-story lateral displacement, permanent residual deformation and structural damage caused by earthquakes under rare earthquakes, and the Non-structural component damage caused by lateral displacement and permanent residual deformation, while considering the impact of component reinforcement on the original building use space, and then propose a self-resetting concrete frame with enlarged cross-section to strengthen existing columns and its implementation method

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