Improving Structural Performance and Design of Aluminum Tubular Member Using CFRP Composites Under Web Crippling Loading

会议论文
发表日期：

2024年

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S. M. Zahurul Islam,
Tanvir Hossen Rezvi,
Abdullah Mohammad Noman,
Faria Noushin Choya,
Shaima Tasnim,
Md. Rashidul Hasan

摘要

Carbon fiber-reinforced polymer (CFRP) is one of the most promising composite materials for strengthening of aluminum and steel tubular structures. Most of the aluminum tubular member has experienced failure of web crippling under localized compressive concentrated loads. The load-bearing capacity as well as structural performance is reduced due to local buckling of aluminum tubular member subjected to web crippling loading. Externally bonded CFRP strengthening may be considered to overcome this problematic local buckling. The aim of this study is to investigate on improving structural performance and design of aluminum tubular member by CFRP composites under web crippling loading. This study mainly concentrates on the CFRP strengthening effects on aluminum tubular member by CFRP composites under web buckling loading. Using CFRP, a wide-ranging lab testing package were performed under loading of web crippling. A total of 24 aluminum specimens having different slenderness ratio were considered in this research. Load–deflection behavior, the failure loads, and the failure modes have been presented due to concentrated loading. The load-carrying capacity improved significantly and varied 34.6–218% for different slenderness ratio and strengthening technique. ABAQUS software has been used to simulate CFRP strengthening aluminum tubular member of the test results. In this study, geometrical and material nonlinearity was included. Good agreement was achieved between the tested results and the FE simulations. Developed finite element model which is verified with test result is used for parametric study using different sections and slenderness ratios. Design equation for aluminum tubular member using CFRP composites under web crippling loading is proposed. Hence, it can be demonstrated that the improving structural performance can be achieved for aluminum tubular member by CFRP composites strengthening under web crippling loading.