He Minjuan, Tao Duo, Li Zheng, Li Maolin
Department of Structural Engineering, Tongji University, Shanghai 200092, China.
Tianjin Hualin (Group) Co., Ltd., 88 Nanhuan Road, Tianjin 300350, China.
Materials (Basel). 2016 Jul 15;9(7):581. doi: 10.3390/ma9070581.
As a renewable building material with low embodied energy characteristics, wood has gained more and more attention in the green and sustainable building industry. In terms of material resource and physical properties, scrimber composite not only makes full use of fast-growing wood species, but also has better mechanical performance and less inherent variability than natural wood material. In this study, the mechanical behavior of bolted beam-to-column joints built with a kind of scrimber composite was investigated both experimentally and numerically. Two groups of specimens were tested under monotonic and low frequency cyclic loading protocols. The experimental results showed that the bolted joints built with scrimber composite performed well in initial stiffness, ductility, and energy dissipation. A three-dimensional (3D) non-linear finite element model (FEM) for the bolted beam-to-column joints was then developed and validated by experimental results. The validated model was further used to investigate the failure mechanism of the bolted joints through stress analysis. This study can contribute to the application of the proposed scrimber composite in structural engineering, and the developed FEM can serve as a useful tool to evaluate the mechanical behavior of such bolted beam-to-column joints with different configurations in future research.
作为一种具有低隐含能源特性的可再生建筑材料，木材在绿色可持续建筑行业中越来越受到关注。在材料资源和物理性能方面，定向刨花板复合材料不仅充分利用了速生木材品种，而且与天然木材相比具有更好的力学性能和更小的固有变异性。在本研究中，对一种用定向刨花板复合材料构建的梁柱螺栓连接节点的力学性能进行了试验和数值研究。两组试件分别在单调加载和低频循环加载方案下进行测试。试验结果表明，用定向刨花板复合材料构建的螺栓连接节点在初始刚度、延性和能量耗散方面表现良好。随后建立了梁柱螺栓连接节点的三维非线性有限元模型，并通过试验结果进行了验证。经验证的模型进一步用于通过应力分析研究螺栓连接节点的破坏机理。本研究有助于所提出的定向刨花板复合材料在结构工程中的应用，所建立的有限元模型可作为未来研究中评估不同配置的此类梁柱螺栓连接节点力学性能的有用工具。
