Dániel Harrach, Habashneh Muayad, Rad Majid Movahedi
Department of Structural and Geotechnical Engineering, Széchenyi István University, Gyor, 9026, Hungary.
Sci Rep. 2022 Aug 10;12(1):13587. doi: 10.1038/s41598-022-17751-6.
Most existed researches consider deterministic numerical analysis when dealing with structural models. However, the test results reveal that uncertainties are existing in most cases regarding some considerations such as material randomness and the lack of experience. Therefore, proposing a probabilistic design models have got attention of researchers according to its important role in predicting accurate performance of the structures. The aim of the proposed work is to consider reliability-based analysis in numerical modelling of glulam beams reinforced with CFRP plates as well as unreinforced glulam beams by considering the properties of used timber material as random variables having mean value and standard deviation taking into consideration that the findings of this study have shown that the reliability index is worked efficiently as a limit which controls the process. Hill yield criterion model is adopted with respect to the data which is obtained from the experimental tests in order to validate the models. Furthermore, a detailed comparison between the reinforced and unreinforced glulam beams are proposed to see the effect of introducing the CFRP plates as a reinforcement material. The results of this study have successfully given a deep understanding of how the uncertainties plays a crucial role on the resulted deformations and stresses in which it was founded by making a comparison between deterministic and probabilistic numerical analysis.
大多数现有研究在处理结构模型时采用确定性数值分析。然而，试验结果表明，在大多数情况下，由于材料随机性和经验不足等因素，存在不确定性。因此，提出概率设计模型因其在预测结构准确性能方面的重要作用而受到研究人员的关注。所提出工作的目的是在数值模拟胶合木梁（用CFRP板加固的以及未加固的胶合木梁）时考虑基于可靠性的分析，将所用木材材料的特性视为具有均值和标准差的随机变量，同时考虑到本研究结果表明可靠性指标作为控制过程的极限有效地发挥作用。针对从试验测试中获得的数据采用希尔屈服准则模型来验证模型。此外，对加固和未加固的胶合木梁进行了详细比较，以观察引入CFRP板作为加固材料的效果。通过对确定性和概率性数值分析进行比较，本研究结果成功地让人深入了解了不确定性如何在所得变形和应力中发挥关键作用。
