Method and system for calculating bearing capacity of isotropic double-pipe concrete column

Abstract

The invention provides a method and system for calculating the bearing capacity of an isotropic double-pipe concrete column, and the method comprises the steps: 1, obtaining the calculation parameters of the double-pipe concrete column, including the Poisson's ratio and the elastic modulus of internal core concrete and external interlayer concrete, and the Poisson's ratio, the elastic modulus, the inner diameter and the wall thickness of an internal pipe and an external pipe; 2, establishing stress and deformation relations among all the parts; 3, substituting calculation parameters into the step 2 to obtain the extrusion stress between the parts; and 4, solving the bearing capacity based on the calculation parameters obtained in the step 1 and the result obtained in the step 3. According to the method, the stress and deformation of each part are analyzed, a deformation coordination equation is established, the radial extrusion stress between the components is solved, and then the load borne by each component is solved, so that the influence on the bearing capacity calculation result due to the fact that each part cannot reach the respective peak stress at the same time can be more truly reflected, and the result is more accurate.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a method and system for calculating the bearing capacity of an isotropic double-pipe concrete column. [0002] technical background [0003] Compared with ordinary single-steel concrete-filled concrete columns, double-steel concrete-filled columns have better fire resistance. Double-steel concrete can also avoid the use of thick-walled steel pipes, which are more difficult to supply and process than ordinary steel pipes. The cross-sectional form of the double-layer steel pipe also helps to avoid the adverse effects of concrete drying shrinkage on the mechanical performance of the structure. For example, the "Technical Regulations for Concrete Steel Tube Structures" (CECS 28: 2012) stipulates that when the diameter of the steel pipe is greater than 2000mm, it should adopt a concentric double-layer or multi-layer cross-section form to avoid the influence of concrete dry...

AI Technical Summary

Problems solved by technology

This leads to that for some specimens, the calculated bearing capacity underestimates the actual bearing capacity, and the calculation results are conservative; while for other specimens, the calculated value is less than the real bearing capacity; The impact of peak strain asynchrony; therefore, accurate calculation results cannot be obtained, and it is easy to cause structural safety hazards

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