Experimental and Theoretical Study of the Equivalent Stiffness Model of Aluminium Alloy Temcor Joints

Gang Wang; Xiaolin Lin; Qiaosheng Chen; Caiqi Zhao; Kun Zhang

doi:10.13206/j.gjgSE23030402

Volume 38 Issue 4

Apr. 2023

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Gang Wang, Xiaolin Lin, Qiaosheng Chen, Caiqi Zhao, Kun Zhang. Experimental and Theoretical Study of the Equivalent Stiffness Model of Aluminium Alloy Temcor Joints[J]. STEEL CONSTRUCTION(Chinese & English), 2023, 38(4): 1-13. doi: 10.13206/j.gjgSE23030402

Citation:

Gang Wang, Xiaolin Lin, Qiaosheng Chen, Caiqi Zhao, Kun Zhang. Experimental and Theoretical Study of the Equivalent Stiffness Model of Aluminium Alloy Temcor Joints[J]. STEEL CONSTRUCTION(Chinese & English), 2023, 38(4): 1-13. doi: 10.13206/j.gjgSE23030402

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Experimental and Theoretical Study of the Equivalent Stiffness Model of Aluminium Alloy Temcor Joints

doi: 10.13206/j.gjgSE23030402

1. Shanghai Baoye Group Corp., Ltd, Shanghai 201900, China;
2. Guangzhou Yuehong Membrane Structure Engineering Co., Ltd., Guangzhou 511400, China;
3. School of Civil Engineering, Southeast University, Nanjing 210096, China;
4. College of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

Received Date: 2023-03-04
Rev Recd Date: 2023-03-27

Available Online: 2023-06-10

Abstract

Abstract

As the most common joint form of aluminum alloy single-layer latticed shells,aluminum alloy plate joints mainly bear the action of axial force and bending moment.The existing research results mainly focus on the stiffness model of the joint under the action of bending moment and axial force alone,and no model can simulate the stiffness characteristics of the joint under the action of bending moment and axial force.This paper will solve this problem through experimental exploration,numerical analysis and theoretical research,and propose an equivalent stiffness model that can consider both the bending moment and the axial force of the plate joint.Firstly,the bending and compression tests of aluminum alloy plate joints are carried out to preliminarily explore the deformation mechanism of joints under the action of bending moment and axial pressure alone.The test results show that the axial deformation and bending deformation of plate joints can be divided into four stages:bolt fixation stage,bolt slip stage,hole wall bearing stage and failure stage.Based on the test,a numerical analysis model is established to study the deformation mechanism of plate joints under the combined action of bending moment and axial force (eccentric force).The numerical analysis results show that the axial deformation mechanism under eccentric force is:1) with the increase of eccentric distance,the equivalent stiffness decreases gradually;2) When the eccentricity is small,the slip stage may occur twice.The deformation characteristics of bending under eccentric force are as follows:1) When the eccentricity is small,repeated sliding occurs;2) When the eccentricity is small,the axial force can improve the bending stiffness,but with the increase of the eccentricity,the axial force can reduce the bending stiffness.In aluminum alloy single-layer latticed shells,the eccentricity of plate joints at different positions is completely different,so it is impossible to accurately calculate the stiffness model of each joint.In order to facilitate calculation and use,the equivalent beam method simulation method can be used.According to the principle of equal axial deformation,bending deformation and yield load,the equivalent stiffness model of aluminum alloy plate joint can be theoretically deduced,and the calculation formula of the parameters of the equivalent two elements of the joint can be obtained.Establish the numerical analysis model and corresponding equivalent stiffness model of plate joints required for verification,and compare the axial and bending load-displacement curves of the two.The results show that the axial deformation and bending deformation of the equivalent beam element model are basically the same as that of the plate joint.Therefore,the Temcor node equivalent model proposed in this paper is accurate and can be used for the stability analysis of single-layer latticed shells.
- temcor joint,
- axial deformation,
- bending deformation,
- eccentric load,
- stiffness model

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References(18)

References

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