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首页> 外文期刊>Journal of structural engineering >Experimental Testing and Analytical Modeling of Glulam Moment Connections with Self-Drilling Dowels
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Experimental Testing and Analytical Modeling of Glulam Moment Connections with Self-Drilling Dowels

机译：自钻销钉的胶石矩连接的实验测试与分析模型

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An experimental and analytical study on rotational behavior of glulam beam-column moment connections with self-drilling dowels (SDDs) is conducted. Connection properties including strength, stiffness, ductility, and energy dissipation were experimentally evaluated by testing seven full-scale connection specimens with and without self-tapping screw (STS) reinforcement along timber perpendicular to grain. All the connections showed high initial stiffness and high moment capacity when compared with the test results of bolted connections reported in the literature. The unreinforced connections had relatively low ductility due to timber splitting despite the increased fastener edge distance. The STS reinforcement effectively reduced the timber splitting tendency and encouraged the yielding of more SDDs, leading to slightly increased moment capacity, but significantly improved ductility. A modified analytical model (MAM) is then proposed to predict strength and rotation of the SDD moment connections based on force and moment equilibrium of the glulam members. Improved prediction accuracy is achieved for the SDD moment connections when compared with the past analytical methods. (C) 2021 American Society of Civil Engineers.
机译：进行了对自钻销钉（SDDS）的胶石光束柱力矩连接旋转行为的实验和分析研究。通过在垂直于谷物的木材的木材螺钉（STS）加强件，通过测试七个全尺寸连接试样进行实验评估连接性能，包括强度，刚度，延展性和能量耗散。与文献中报道的螺栓连接的测试结果相比，所有连接显示出高的初始刚度和高力量容量。尽管增加紧固件边缘距离，但是由于木材分裂，未原因的连接具有相对低的延展性。 STS增强有效地降低了木材分裂趋势，并鼓励产生更多SDD，导致略微增加的力矩容量，但显着提高了延展性。然后提出了一种改进的分析模型（MAM）以基于胶壳构件的力和力矩平衡来预测SDD时刻连接的强度和旋转。与过去的分析方法相比，在SDD时刻连接实现了改进的预测精度。 （c）2021年美国土木工程师协会。

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