A column foundation structure for long-span buildings

Abstract

The invention relates to the technical field of building engineering, and discloses a column foundation structure for large-span buildings, which includes a base and a pier arranged on the base, and also includes a rib wall vertically arranged on the base, and the rib wall surrounds the A plurality of abutments are arranged at intervals, and the rib wall has a first constraint surface connected to the abutment and a second constraint surface connected to the base. The ribbed wall divides the base into multiple plates, which changes the constraint boundary conditions of the base. The base is jointly constrained by the abutment and the ribbed wall, which increases the bending resistance of the base, greatly reduces the bending moment of the base, and can be greatly improved. Optimize the reinforcement of the base plate; at the same time, the rib wall imposes multilateral constraints on the base, and the punching and shearing of the base to the column is also transformed into the punching and shearing of the base to the rib wall, which increases the bearing capacity of the punching and shearing The area reduces the stress area of ​​the punching and shearing of the base, improves the bearing capacity of the base against punching and shearing, reduces the thickness of the base, and reduces the amount of reinforcement.

Description

technical field [0001] The invention relates to the technical field of building engineering, in particular to a column foundation structure for large-span buildings. Background technique [0002] There are large-scale buildings with large spans and large column distances in thermal power plants and waste power plants, such as dry coal sheds, air-cooled supports, incineration rooms, and flue gas purification rooms. Due to their large size (height: 40m-70m, span: 50m-100m), therefore, the design of column foundations for these large-scale buildings is basically based on wind load control. [0003] Under the action of wind load, the column base reaction force appears on the column base, and the compressive and pulling forces appear between the column base and the base, and generate a large horizontal force and bending moment. The superposition of the two produces a large additional bending moment on the column base. The additional stress of the base is very large, resulting in...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a column foundation structure for large-span buildings, to solve the problem that the base reaction force of the column foundation structure in the prior art is large, the amount of foundation concrete is large after the foundation size is increased, and the reinforcement is greatly increased. The problem of wasting steel bars

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