First linear elastic estimation method for analyzing ultimate bearing capacity of planar circular tube structure

A technology for ultimate bearing capacity and structural analysis, applied in computing, special data processing applications, instruments, etc., it can solve the problems of complex computing process, low computing efficiency, difficult engineering application, etc., and achieve the effect of high computing accuracy, overall safety and convenience

Inactive Publication Date: 2017-05-31
GUANGXI UNIV
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

EPIA has a reliable theory and high calculation accuracy. Its effectiveness has been verified by a large number of model experiments. It has been applied to circular tubular structures such as steel frames and steel pipe arch bridges. It is usually used to test the accuracy of other analysis methods, but it solves engineering structures. The ultimate bearing capacity needs to consider the complex loading process, and the calculation amount is large; MPA is a mathematical optimization method based on the limit theorem to solve the constraints, but its nonlinear constraints and objective functions will make the calculation amount large and the calculation efficiency is low; EMAP The principle is simple and can avoid the complex elastic-plastic analysis process, but it requires multiple linear elastic iterative analysis and adjustment of elastic modulus, resulting in complicated calculation process and difficult engineering application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • First linear elastic estimation method for analyzing ultimate bearing capacity of planar circular tube structure
  • First linear elastic estimation method for analyzing ultimate bearing capacity of planar circular tube structure
  • First linear elastic estimation method for analyzing ultimate bearing capacity of planar circular tube structure

Examples

Experimental program
Comparison scheme
Effect test

specific example

[0041] This embodiment is a specific example of a linear elastic estimation method for the analysis of the ultimate bearing capacity of a planar circular tube structure, including the following steps:

[0042] (1) Establish the structural analysis model of the plane circular tube:

[0043] The beam length L of a plane circular tube structure is 4m, and the column height H is 3m. The geometric dimensions and material parameters of other plane circular tube structures are shown in Table 1. Under the action of vertical uniform load q and horizontal concentrated load P, P=qL / 4, the calculation model of the plane circular tube structure is as follows figure 1 As shown, its cross-section and stress distribution are shown as figure 2 shown. Using ANSYS software for modeling and beam element simulation, the finite element mesh of the planar circular tube structure is as follows image 3 .

[0044] Table 1 Structural dimensions and material parameters of planar circular tubes

[...

Embodiment 2

[0059]For the analysis of the ultimate bearing capacity of the planar circular pipe structure described in Example 1, EPIA, whose calculation accuracy has been recognized in the field, was used to solve the problem, and ANSYS software was used to extract the number of iterations required by EPIA to solve the ultimate bearing capacity. The calculation results are shown in Table 4 .

[0060] Table 4 Comparison of calculation accuracy and efficiency between EPIA and linear elastic estimation method

[0061] calculation method EPIA Linear Elastic Estimation Method ultimate bearing capacity 2.965kN·m -1

[0062] It can be seen from Table 4 that the calculation accuracy of the ultimate bearing capacity of the plane circular pipe structure obtained by the linear elastic estimation method is only 1.45% compared with EPIA. EPIA needs 84 iteration steps to solve the ultimate bearing capacity of the planar circular tube structure, and the calculation efficiency is ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A first linear elastic estimation method for analyzing ultimate bearing capacity of a planar circular tube structure comprises the steps of (1) establishing a planar circular tube structure analyzing model; (2) determining a failure unit; (3) calculating ultimate bearing capacity of the planar circular tube structure by means of first linear elastic estimation; the method allows the ultimate bearing capacity of the planar circular tube structure to be solved accurately and quickly through first linear elastic analysis; the defect is overcome that a universal elastoplasticity incremental analysis method for analyzing structural ultimate bearing capacity is insufficient due to the need for setting a complex loading process and carrying out multiple incremental iterative analysis; the efficient method for estimating the overall safety of the planar circular tube structure is provided.

Description

technical field [0001] The invention relates to a numerical method for analyzing the ultimate bearing capacity of a plane circular tube structure, in particular to a primary linear elastic estimation method for analyzing the ultimate bearing capacity of a plane circular tube structure. Background technique [0002] Round tubes are a typical thin-walled member with the advantages of biaxial symmetry and relatively high stiffness. They are often used as important load-bearing members in structural systems and are widely used in construction engineering, bridge engineering, and power transmission and transformation engineering. Therefore, ensuring the safety of the planar circular tube structure is a very important engineering issue, and the ultimate bearing capacity is an important indicator of the overall safety. Therefore, related research is an important topic in the study of planar circular tube structures. [0003] The analysis methods of ultimate bearing capacity of plan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 张阳张伟陈正李伟唐可人
Owner GUANGXI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap