Method for determining calculated length of rod piece with large-span spatial structure and complicated boundary conditions

A method of determining and calculating length, applied in the direction of building structure, construction, etc., can solve problems such as the influence of the stable bearing capacity of the main member and the change of the axial force of the member, so as to make up for the shortcomings of the calculation of length research, improve the accuracy, The effect of enriching design theory
CN102277899BActive Publication Date: 2014-01-29SHENZHEN GENERAL INST OF ARCHITECTURAL DESIGN & RES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN GENERAL INST OF ARCHITECTURAL DESIGN & RES
Publication Date
2014-01-29

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Abstract

The invention belongs to the field of structural engineering. The technical problems to be solved are to overcome the shortcomings of the prior art and provide a relatively more precise method for determining the calculated length of a primary steel member with a large-span spatial structure and complicated boundary conditions. The method comprises the following steps of: 1, performing characteristic value buckling analysis on an integral structure under load control working condition to obtain the buckling mode of each order; 2, applying minor geometric imperfection by taking a rod piece destabilization mode obtained by the characteristic value buckling analysis as an initial state of form, and performing geometrically nonlinear elastic bearing capability process analysis on the integral structure; 3, in a bearing capability losing process of the integral structure, tracking the axial force-displacement changing conditions of a rod piece, and judging the occurrence of a critical load according to whether an axial force reaches a maximum value and is declined or not; and 4, determining the calculated length of the rod piece according to a formula, wherein the steps are finished by a computer.
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Description

technical field

[0001] The invention belongs to the field of structural engineering, and more specifically relates to a method for determining the calculated length of a member with complex boundary conditions in a long-span space structure. Background technique

[0002] Many existing architectural design structures are applied to the truss or reticulated shell structure composed of rod trusses, and more and more building structures adopt this kind of structural shape as a whole. Therefore, for the truss or reticulated shell truss The analysis of rods and rods is becoming more and more important. In different structures of rods, how to determine the equivalent length of rods for calculation is an important parameter and a necessary prerequisite for structural elastic analysis of rods. With the enlargement of the overall structure of the truss, especially the complex long-span space structure, the boundary conditions of the members are becoming more and more complicated, and ...

Claims

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