Kennaway Joel, Rajabipour Ali, Huang Dongsheng, Bazli Milad, Tang Siyuan, Wang Junkai, Zanker Hayden, Su Fangming
College of Engineering, IT & Environment, Charles Darwin University, Darwin 0801, Australia.
National Engineering Research Center of Biomaterials, Nanjing Forestry University, Nanjing 210037, China.
Polymers (Basel). 2022 May 17;14(10):2051. doi: 10.3390/polym14102051.
Parallel strand bamboo is a composite material that demonstrates high strength and low variability compared to other timber materials. However, its use in bolted connections is limited by a tendency to fail in shear-out mode. One promising technique to prevent failure is the method of confinement, whereby the composite connection is confined laterally, inducing a compressive force perpendicular to the composite fibres, which increases the shear strength in the loading process. This paper investigates the confinement method and its effect on parallel strand bamboo connections' strength and failure mechanisms through experimental tests and ANSYS simulation methods. It was discovered that bolted connection confinement reduces the propensity of shear-out failure by counteracting shear stresses. A comparison of graphical results revealed that confinement increased the ultimate tensile capacity of parallel strand bamboo bolted connections by up to 26%. Confinement also improved the consistency of the connection's mechanical properties throughout the loading process. These findings assist in refining and optimising practical applications of parallel strand bamboo connections by using the method of connection confinement.
平行绞合竹材是一种复合材料，与其他木材相比，它具有高强度和低变异性。然而，其在螺栓连接中的应用受到剪坏模式失效倾向的限制。一种很有前景的防止失效的技术是约束方法，即对复合材料连接进行横向约束，在垂直于复合纤维的方向上产生压缩力，这会在加载过程中提高抗剪强度。本文通过试验测试和ANSYS模拟方法研究了约束方法及其对平行绞合竹材连接强度和破坏机制的影响。研究发现，螺栓连接约束通过抵消剪应力降低了剪坏失效的倾向。图形结果比较表明，约束使平行绞合竹材螺栓连接的极限抗拉能力提高了26%。约束还提高了整个加载过程中连接力学性能的一致性。这些发现有助于通过使用连接约束方法来改进和优化平行绞合竹材连接的实际应用。
