基于有限元分析的外貼BFRP加固新疆楊木梁的抗彎性能研究
[Abstract]:Xinjiang poplar is widely distributed in Xinjiang, the growth rate is fast, the annual output is large, but its strength is low, durability is poor, easy to dry and crack, at the same time, there are natural defects such as wood joint crack, which restricts its application as a stress component of building structure. At present, the mechanical properties of wood with poor mechanical properties can be improved by strengthening. Basalt fiber composite reinforcement material (Basalt fiber reinforced plastics/BFRP (basalt fiber composite reinforcement material) is an effective reinforcement technology, which has been more and more widely used in the field of wood structure reinforcement and repair. Some scholars at home and abroad have done research on the reinforcement of wooden components with basalt fiber, but the research on the reinforcement of Xinjiang poplar is less, especially the analysis by finite element simulation is relatively few. Therefore, the research on the simulation of BFRP strengthened poplar beam in Xinjiang has certain theoretical significance. In this paper, the bending performance of unstrengthened wooden beams and bonded BFRP strengthened wooden beams is simulated. Firstly, the finite element software ANSYS is used to establish the model. In order to verify the accuracy of the relevant parameters and models, the simulation values are compared with the theoretical formula calculation results. Secondly, through numerical calculation and analysis, the load-deflection curve, stress cloud diagram and strain variation curve along the height of each specimen are obtained, and the mechanical properties of the failure form, ultimate bearing capacity and load-deformation characteristics are comprehensively analyzed. Finally, the numerical simulation results are compared with the experimental results. The simulation results of mechanical properties such as deformation trend, bending capacity and load-deflection curve of BFRP strengthened poplar beams in Xinjiang are close to the experimental results. At the same time, under the same load, the strain distribution along the cross section height direction is basically consistent with the experimental value, so the numerical calculation results are reliable, which provides a certain reference and reference significance for the future study of the bending performance of Xinjiang Yangmu beam strengthened by BFRP.
【學(xué)位授予單位】:新疆大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:TU366.2
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