Buckling behaviors of thin-walled aluminum alloy column with irregular-shaped cross section under axial compression in a fire

2016 ◽  
Vol 98 ◽  
pp. 230-243 ◽  
Author(s):  
Mei Liu ◽  
Yicun Chang ◽  
Peijun Wang ◽  
Lulu Zhang
Keyword(s):  
Aluminum Alloy ◽  
Axial Compression ◽  
Cross Section ◽  
Thin Walled ◽  
Shaped Cross Section

Experimental-numerical test of open section composite columns stability subjected to axial compression

2017 ◽  
Vol 84 (2) ◽  
pp. 58-64 ◽  
Author(s):  
P. Różyło
Keyword(s):  
Axial Compression ◽  
Cross Section ◽  
Critical State ◽  
Critical Loads ◽  
Composite Structures ◽  
Load Capacity ◽  
Numerical Test ◽  
Approximation Methods ◽  
Loss Of Stability ◽  
Thin Walled

Purpose: The aim of the work was to analyse the critical state of thin-walled composite profiles with top-hat cross section under axial compression. Design/methodology/approach: The purpose of the work was achieved by using known approximation methods in experimental and finite element methods for numerical simulations. The scope of work included an analysis of the behavior of thin-walled composite structures in critical state with respect to numerical studies verified experimentally. Findings: In the presented work were determined the values of critical loads related to the loss of stability of the structures by using well-known approximation methods and computer simulations (FEM analysis). Research limitations/implications: The research presented in the paper is about the potential possibility of determining the values of critical loads equivalent to loss of stability of thin-walled composite structures and the future possibility of analyzing limit states related to loss of load capacity. Practical implications: The practical approach in the actual application of the described specimen and methodology of study is related to the necessity of carrying out of strength analyzes, allowing for a precise assessment of the loads upon which the loss of stability (bifurcation) occurs. Originality/value: The originality of the research is closely associated with used the thinwalled composite profile with top-hat cross-section, which is commonly used in the fuselage of passenger airplane. The methodology of simultaneous confrontation of the obtained results of critical loads by using approximation methods and using the linear eigenvalue solution in numerical analysis demonstrates the originality of the research character. Presented results and the methodology are intended for researchers, who are concerned with the topic of loss of stability of thin-walled composite structures.

Structural bionic design for thin-walled cylindrical shell against buckling under axial compression

2011 ◽  
Vol 225 (11) ◽  
pp. 2619-2627 ◽  
Author(s):  
D Xing ◽  
W Chen ◽  
J Ma ◽  
L Zhao
Keyword(s):  
Cylindrical Shell ◽  
Axial Compression ◽  
Cross Section ◽  
Cylindrical Shells ◽  
High Load ◽  
Vascular Bundles ◽  
Bionic Design ◽  
Load Bearing ◽  
Thin Walled ◽  
The Cross

In nature, bamboo develops an excellent structure to bear nature forces, and it is very helpful for designing thin-walled cylindrical shells with high load-bearing efficiency. In this article, the cross-section of bamboo is investigated, and the feature of the gradual distribution of vascular bundles in bamboo cross-section is outlined. Based on that, a structural bionic design for thin-walled cylindrical shells is presented, of which the manufacturability is also taken into consideration. The comparison between the bionic thin-walled cylindrical shell and a simple hollow one with the same weight showed that the load-bearing efficiency was improved by 44.7 per cent.

scholarly journals Improvement of prt-9 constructive system on the basis of frame elements strength balance

2020 ◽  
Vol 100 (4) ◽  
pp. 40-45
Author(s):  
Taras Dovbush ◽  
Nadia Khomyk ◽  
Hanna Tson ◽  
Anatoliy Dovbush
Keyword(s):  
Cross Section ◽  
Rectangular Cross Section ◽  
Organic Fertilizer ◽  
Experimental Investigations ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
Strength Uniformity ◽  
Shaped Cross Section ◽  
Main Frame

Analytical and experimental investigations of the most loaded elements of the base frame of PRT-9 solid organic fertilizer spreader are carried out in this paper. The residual operation life of the central beam of the paired Z-shaped profile, as well as the lateral spars of the Z-shaped cross section are determined. According to the results of studies, it was found that the residual operation life of these system elements differ significantly. In order to achieve strength uniformity of the main frame elements, it is decided to weaken the central beam by replacing the paired Z-shaped profile with a thin-walled tube of rectangular cross-section and strengthen the lateral spars by replacing Z-shaped profile with a channel profile with the same height.

Dynamic performances of thin-walled tubes with star-shaped cross section under axial impact

2016 ◽  
Vol 100 ◽  
pp. 25-37 ◽  
Author(s):  
Wangyu Liu ◽  
Zhenqiong Lin ◽  
Ningling Wang ◽  
Xiaolin Deng
Keyword(s):  
Cross Section ◽  
Axial Impact ◽  
Dynamic Performances ◽  
Thin Walled ◽  
Shaped Cross Section

Comparative Analysis of Methods for Calculating Cold-Formed Steel Structures

2018 ◽  
Vol 931 ◽  
pp. 188-195
Author(s):  
Alexey A. Reshetnikov ◽  
Vladislav Y. Kornet ◽  
Darya A. Leonova
Keyword(s):  
Comparative Analysis ◽  
Cross Section ◽  
Block Diagram ◽  
Steel Structures ◽  
Solution Algorithm ◽  
American Institute ◽  
Thin Walled Structures ◽  
Cold Formed Steel ◽  
Thin Walled ◽  
Shaped Cross Section

This article presents a comparative analysis of methods for calculating cold-formed steel structures, or light steel thin-walled structures (LSTS), as they are called in Russia, according to domestic and foreign norms. For comparison, the calculation provisions for SR 260.1325800.2016 "Steel thin-walled constructions from cold-bent galvanized sheets" and AISI (American Institute of Ferrous Metallurgy) were taken. For clarity of the solution algorithm, a block diagram for each method is presented. Specific features of calculating the C-shaped cross-section for bending by both methods are indicated [1].

Sensitivity Parameter Analysis of Bearing Capacity and Ductility of Reinforced Concrete Columns with Z-Shaped Cross-Section

2013 ◽  
Vol 831 ◽  
pp. 158-163
Author(s):  
Jun Ting Jiao ◽  
Rong Hua Yang
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Cross Section ◽  
Orthogonal Design ◽  
Limb Length ◽  
Sensitivity Factor ◽  
Rc Columns ◽  
Sensitivity Parameter ◽  
Shaped Cross Section

In order to select sensitivity parameter of bearing capacity and ductility, the orthogonal design method was used to research reinforced concrete (RC) columns with Z-shaped cross-section under compression and bending, by the nonlinear analysis computer program of RC columns with irregularly-shaped cross-section. The seven parameters and four levels of orthogonal design were researched, for example ratio of limb length to limb thickness, ratio of axial compression, loading angle, concrete strength, long reinforce ratio, stirrup diameter and stirrup spacing. The results indicated that the best sensitivity factor of bearing capacity was ratio of limb length to limb thickness, next were loading angle and long reinforce ratio; the best sensitivity factor of ductility was ratio of axial compression, next were stirrup diameter and stirrup spacing. These would afford references for the design of RC columns with Z-shaped cross-section.

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