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Experimental investigation of joint with positive eccentricity in CFS truss

机译：CFS桁架阳性偏心关节的实验研究

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摘要

Due to technological restrictions, in the case of trusses made of CFS open cross-sections, positive eccentricities in the truss joints have become very frequent. Therefore studies concerning the load-bearing capacity of truss joints with positive eccentricity were undertaken. It was assumed that the resistance of cold-formed steel (CFS) open cross-section truss joints located on compression chords and with positive eccentricity is greater than that which results from hitherto known methods of steel structure dimensioning. In order to confirm the hypothesis, experimental studies were conducted. A series of 5 full-scale research models was subjected to destructive tests to determine the deformation forms and strains of the hat-section walls in the area of the eccentric joint. Forms of truss chord stability loss under compression and bending were identified. The course of research and analysis of results were described in the article. Than comparative analysis of the outcomes of the experimental tests and the results of analytical calculations carried out according to Eurocode standards was done, and the obtained results confirmed the usefulness of the undertaken research. The obtained results did not allow for explicit confirmation of the research hypothesis at this stage, but constituted the basis for validation of the numerical model which has been elaborated. Currently, the authors carry out a variety of numerical analysis.
机译：由于技术限制，在CFS开放横截面的桁架的情况下，桁架关节中的正偏心都变得非常频繁。因此，开展了关于桁架关节承载能力的研究。假设冷成型钢（CFS）的电阻位于压缩弦上的横截面桁架关节和阳性偏心率大于诸如锂结构尺寸的已知方法的结果。为了确认假设，进行实验研究。一系列5个全规模研究模型受到破坏性测试，以确定偏心接头区域的帽子段壁的变形形式和菌株。鉴定了压缩和弯曲下的桁架弦稳定性损失的形式。结果描述了结果的研究和分析。而不是对实验试验结果的比较分析以及根据欧元码标准进行的分析计算结果，获得的结果证实了进行的研究的有用性。获得的结果不允许在本阶段明确确认研究假设，但构成了验证已阐述的数值模型的基础。目前，作者进行了各种数值分析。

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