1.School of Material Science and engineering, Central South University of Forestry and Technology;2.Research Institute of Wood Industry, Chinese Academy of Forestry;3.School of Material Science and engineering, Central South University of Forestry and Technology,
基于重组竹螺栓连接承载性能分析,分析评价了现有木结构设计规范对重组竹螺栓连接承载能力预测的适用性,为重组竹结构连接设计和应用提供借鉴和依据。采用正交设计法对16组48个重组竹-钢夹板单螺栓连接节点试样进行了试验,验证了Foshci理论模型对重组竹-钢夹板单螺栓连接节点的适用性,揭示了螺栓直径、端距及主构件厚度等因素对节点承载能力的影响规律,最后分析评价了GB 50005和European 5规范对重组竹-钢夹板螺栓连接承载能力预测的准确性。研究结果表明：Foschi理论模型能够反映节点的线弹性、屈服后阶段的变化特征,能够较为全面地反映重组竹-钢夹板螺栓连接节点整个受力过程。螺栓连接承载力受螺栓直径、主构件厚度和端距三因素共同影响,但当节点达到最小尺寸设计要求时,承载能力受螺栓直径影响的作用最为明显。Eurocode 5对重组竹-钢夹板螺栓连接节点承载预测能力偏保守,而我国GB50005预测能力存在安全富余的空间,能较好地预测重组竹-钢夹板螺栓连接的承载能力。
Based on the analysis of the bearing capacity of the bolted connections for bamboo scrimber, the applicability of the wood structure design codes in calculating the bearing capacity of the bolted connections for bamboo scrimber was evaluated, in order to providing some references for the design and application of bolted connection for bamboo structure. A total of 48 specimens in 16 groups designed by orthogonal scheme were tested in this study. Firstly, the applicability of Foshci’s theory model was verified. Then, the effects of bolt diameter, end distance and main component thickness on the bearing properties of bolt connections were analyzed. Finally, the accuracy of GB 50005 and European 5 in calculating the bearing capacity of the bolted steel-BS-steel connections was evaluated. The result showed that foschi"s theoretical model could reflects the characteristics of both the linear elasticity and post-yield phases, which also expressed the whole bearing processes of the connections, comprehensively. The bearing capacity is affected by bolt diameter, main component thickness and end distance, and it is affected by the bolt diameter most obviously when the connection meets the minimum requirements of size design. Besides, Eurocode 5 is so conservative in calculating the bearing capacity of the bolted steel-BS-steel connections. There is a safe and affluent space in calculating the bearing capacity by GB50005, which is more suitable for calculating the bearing capacity of the bolted steel-BS-steel connections than Eurocode 5.