Mechanical analysis and calculation method for hollow floor with built-in thin-wall corrugated cylinders

Abstract

The invention discloses a mechanical analysis and calculation method for hollow floor with built-in thin-wall corrugated cylinders, which comprises the following steps of: obtaining a rigidity formula by combining material characteristics and structural characteristics of a reinforced concrete plate, a ribbed plate and a corrugated pipe, and calculating a theoretical deflection formula under boundary conditions of simply supporting two sides and fixedly supporting two sides. By combining the structural characteristics of the corrugated cylinder cast-in-place concrete hollow floor, introducing a Cartesian coordinate system, and establishing a hollow floor coordinate graph; the principle of equivalent stiffness is adopted, orthotropic property and material anisotropy are considered at the same time, a corrugation simplification coefficient is introduced, the stiffness formula of the ribbed plate and the corrugated plate is improved in elastic mechanics, and taking the ribbed plate part as a rib to be merged into a flange; taking one unit cross section from each axis for analysis; and based on the rigidity theoretical formula, introducing boundary conditions of two-opposite-side simple support and two-opposite-side fixed support to obtain a theoretical deflection formula. The method is an innovation of the existing hollow floor mechanical research theory, and enriches and perfects the existing calculation mode.

Description

technical field [0001] The invention relates to the field of building testing, in particular to a method for mechanical analysis and calculation of a built-in thin-wall corrugated cylinder hollow floor. Background technique [0002] The cast-in-place concrete hollow floor is a novel technical system emerging in response to the trend of energy saving, emission reduction and green environmental protection. The hollow floor not only meets the requirements of large space and large span building structure, but also meets the requirements of seismic performance, making it more comfortable and more beautiful. The structural characteristics of cast-in-place concrete hollow floors are mainly reflected in light weight, increased floor height, large span, and flexible structural layout. Therefore, it is more and more widely used in practical projects. However, the hollow floor is affected by the shape of the filling body, resulting in changes in the mechanical performance of the floor...

AI Technical Summary

Problems solved by technology

[0013] To sum up, in the current theoretical research on floors, the built-in bellows floor is a new type of floor. At present, there are few theoretical studies involved, and there is no simultaneous consideration of reinforced concrete slabs, ribbed slabs, and bellows. The theoretical formulas of the material properties and structural properties of stiffness; therefore, the development of formulas such as the calculation of structural internal forces for various types of hollow-core floors is not complete

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