Superimposed reinforcement structure and method for additionally arranging column grid on existing long-span structure

Abstract

The invention belongs to the field of constructional engineering and particularly relates to a superimposed reinforcement structure for additionally arranging a column grid on an existing long-span structure. The superimposed reinforcement structure comprises existing structure columns and an existing long-span structure beam which is supported on the existing structure columns. An additional beam superimposed layer is arranged on the existing long-span structure beam, profile steel is arranged inside the additional beam superimposed layer, and the existing long-span structure beam and the additional beam superimposed layer are provided with shear-resistant connection steel bars and junction surface constructional steel bars in the position of an old and new concrete junction surface. By means of the superimposed reinforcement structure, components of the existing structure do not need to be dismantled, the damage to the existing structure is small, and normal functional application of an existing building does not need to be interrupted; the characteristic that the existing structure possesses certain bearing capacity is fully utilized, and temporary construction safety supporting measures are not needed, so that the construction cost is reduced and the construction efficiency is improved; and the shear-resistant bearing capacity of the superimposed structure in the position of the junction surface is guaranteed, and finally, the overall anti-bending bearing capacity of the superimposed structure is guaranteed.

Description

technical field [0001] The invention belongs to the field of construction engineering, and in particular relates to a superimposed reinforcement method for adding a new column net to an existing long-span structure. Background technique [0002] According to the current urban planning and management requirements, the orderly implementation of urban repair and organic renewal and the continuation of the historical context will become the focus. At present, in many cities, there are some "unfinished buildings" that have been shut down due to funding problems or failure to meet market demand. The renovation and redesign of similar projects are necessary to revitalize the suspended projects and improve the city's image. At the same time, in the future urbanization process, the inspection, identification and reinforcement of existing buildings will be put on the important agenda. [0003] However, in the existing reinforcement and reconstruction technology, there are generally s...

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Problems solved by technology

[0003] However, in the existing reinforcement and transformation technology, there are generally some problems such as durability after reinforcement, safety hazards caused by temporary measures not in place due to component removal during reinforcement construction, and reduced seismic performance after reinforcement.

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