Method for calculating equivalent calculation length and stability of steel tube concrete tapered column in view of integral space action

Abstract

The invention discloses a method for calculating equivalent calculation length and stability of a steel tube concrete tapered column in view of an integral space action, and belongs to the field of steel tube concrete tapered column design. The method comprises the steps of: calculating an eigenvalue load of the steel tube concrete tapered column in view of the integral space action through finite element software, performing eigenvalue buckling analysis on a column with two hinged ends without the space action, and analyzing a buckling eigenvalue of a column with two hinged ends, a small head and a uniform section without the space action; calculating a calculation length coefficient of a supporting column in view of an integral space restriction action; obtaining an equivalent calculation length coefficient of the steel tube concrete tapered column with two hinged ends under an equivalent uniform-section column; and obtaining an equivalent calculation length coefficient of the tapered column in view of the integral space action. The invention provides a judgment method for the equivalent calculation length and stability of the steel tube concrete tapered column in view of the integral space action, so that a practical, efficient and accurate engineering application calculation method is obtained.

Description

technical field [0001] The invention belongs to the design field of steel pipe concrete tapered columns. Background technique [0002] Concrete-filled steel tube conical columns, as important structural support members, are often used in large-scale complex long-span spatial structures, so the design and calculation methods for their stable bearing capacity are very important. However, the current codes and regulations do not explain the calculation of the length coefficient of the CFST conical column, let alone its stability judgment under the consideration of the overall space. It is a planar model rather than a spatial model. The current engineering application method: For each load mode, each order of buckling mode is used to find the stable bearing capacity of each column to obtain the calculation length coefficient of each column, so as to consider the overall effect of space, but it is quite cumbersome for complex structures , is not practical. Therefore, in the cu...

AI Technical Summary

Problems solved by technology

The current engineering application method: For each load mode, each order of buckling mode is used to find the stable bearing capacity of each column to obtain the calculation length coefficient of each column, so as to consider the overall effect of space, but it is quite cumbersome for complex structures , is not practical

Therefore, in the current project, there is no reasonable design check of the stable bearing capacity of the CFST conical column under the action of the overall space of the structure.

Images