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带热断桥铝型材等效惯性矩和应力的实验测定

Experimental Determination of the Equivalent Moment of Inertia and Stresses of Aluminium Profiles with Thermal Breaks.

作者信息

Rusin Dawid, Juraszek Janusz, Woźniczka Piotr

机构信息

CUT Doctoral School, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland.

Aluprof S.A., Warszawska 153, 43-300 Bielsko-Biała, Poland.

出版信息

Materials (Basel). 2024 Dec 25;18(1):23. doi: 10.3390/ma18010023.

DOI:10.3390/ma18010023
PMID:39795672
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11721139/
Abstract

This paper presents the results of experimental tests and computer simulations on the stiffness of composite aluminium mullions used in unitised façades. The elements analysed were subjected to bending in order to simulate the actual operating conditions of aluminium façades subjected to significant wind pressure or suction loads. The basic mechanical and physical properties of the materials from which the analysed type of aluminium façade is made (Aluminium EN AW-6060 in the T66 temper and polyamide PA66 25GF), the test method, and the results obtained are described. As a result of the tests, equivalent moments of inertia of the composite profile (aluminium profile with the thermal break) were determined, which are strongly dependent on the strength of the connection between the individual elements, the asymmetry of the cross-section, and the properties of the thermal break. Strain measurements carried out using FBG (Fiber Bragg Grating) strain sensors installed in the profiles under tests allowed for determining the actual stress values of the aluminium profiles under consideration. The results obtained were compared to theoretical (numerical) values, indicating discrepancies at higher load values. The methodology presented in this article is to be used to monitor the deformation of the aluminium façade mullions of HRB (High-Rise Buildings).

摘要

本文介绍了对单元式幕墙中使用的复合铝竖框刚度进行实验测试和计算机模拟的结果。所分析的构件承受弯曲作用，以模拟承受显著风压或吸力荷载的铝幕墙的实际运行条件。描述了所分析类型的铝幕墙所用材料（T66 状态的 EN AW-6060 铝合金和 25%玻纤增强聚酰胺 PA66）的基本力学和物理性能、测试方法以及所得结果。测试结果确定了复合型材（带隔热条的铝型材）的等效惯性矩，其强烈依赖于各个构件之间的连接强度、横截面的不对称性以及隔热条的性能。使用安装在测试型材中的光纤布拉格光栅（FBG）应变传感器进行的应变测量，能够确定所考虑的铝型材的实际应力值。将所得结果与理论（数值）值进行了比较，结果表明在较高荷载值时存在差异。本文所提出的方法将用于监测高层建筑（HRB）铝幕墙竖框的变形。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e17/11721139/3717dd6c928d/materials-18-00023-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e17/11721139/19b8f97f844c/materials-18-00023-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e17/11721139/764dceaa1e08/materials-18-00023-g017.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e17/11721139/28ebede67bce/materials-18-00023-g020.jpg

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本文引用的文献

1
The Strain Transfer Mechanism of Fiber Bragg Grating Sensor for Extra Large Strain Monitoring.用于超大应变监测的光纤布拉格光栅传感器的应变传递机制
Sensors (Basel). 2019 Apr 18;19(8):1851. doi: 10.3390/s19081851.