层板胶合木梁柱钢填板-螺栓连接节点横纹受力性能试验研究

罗烈, 陈庆烈, 宋晓滨

建筑结构学报 ›› 2019, Vol. 40 ›› Issue (09) : 28-36.

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建筑结构学报 ›› 2019, Vol. 40 ›› Issue (09) : 28-36. DOI: 10.14006/j.jzjgxb.2018.0470
竹木结构

层板胶合木梁柱钢填板-螺栓连接节点横纹受力性能试验研究

  • 罗烈1,2, 陈庆烈1,2, 宋晓滨1,2
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Experimental study on mechanical behavior of bolted glulam beam-to-column connections with slotted-in steel plates loaded perpendicular to grain

  • LUO Lie1,2, CHEN Qinglie1,2, SONG Xiaobin1,2
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摘要

为研究层板胶合木梁柱钢填板-螺栓连接节点横纹受力性能,对6组20个足尺节点试件进行抗剪试验,获得了节点的受剪性能指标和特征曲线。结果表明:节点的破坏均表现为木材的横纹劈裂脆性破坏,且第一条贯穿裂缝基本出现在靠近加载侧的螺栓孔处;相比于加载边边距e2,非加载边边距e1对节点的力学性能影响更为显著,非加载边边距e1取30~70mm时节点的屈服荷载和弹性刚度的变化幅值分别达16.6%和60.8%。总体上,试验所得受剪承载力与理论公式计算的相差较大,但相对而言,由van der Put计算公式计算的受剪承载力与试验结果最为接近,且偏于保守。

Abstract

Bolted glulam beam-to-column connections with slotted-in steel plates are commonly used in heavy timber structures. In this paper, 20 full-scale connection specimens, categorized in 6 groups, were tested under shear loading to investigate the mechanical behavior of such connections loaded perpendicular to grain. The results showed that the failure of all the connections was cracking perpendicular to the grain of the wood and the first penetration crack took place near the bolt holes of the upper row. The test results also showed that compared with the loading edge distance e2, the non-loaded edge distance e1 was more influential to the shear performance of the connections. The yield load and elastic stiffness of the joint will change by 16.6% and 60.8%,respectively,with changed non-loaded edge distence e1 varying from 30mm to 70mm.In general, the shear capacity obtained from the tests differed greatly from the predicted values of the existing theoretical formulas. Nevertheless, among the existing formulas, the van der Put’s formula provides predictions that are conservative and closest to the test results, and may thus can be used for design purposes.

关键词

层板胶合木; 螺栓连接;  / 钢填板; 边距; 受剪试验; 横纹受力性能

Key words

glued laminated lumber(glulam) / bolted glulam beam-to-column connection / slotted-in steel plate / edge distance / shear test / loaded perpendicular to grain

引用本文

导出引用
罗烈, 陈庆烈, 宋晓滨. 层板胶合木梁柱钢填板-螺栓连接节点横纹受力性能试验研究[J]. 建筑结构学报, 2019, 40(09): 28-36. https://doi.org/10.14006/j.jzjgxb.2018.0470
LUO Lie, CHEN Qinglie, SONG Xiaobin. Experimental study on mechanical behavior of bolted glulam beam-to-column connections with slotted-in steel plates loaded perpendicular to grain[J]. Journal of Building Structures, 2019, 40(09): 28-36. https://doi.org/10.14006/j.jzjgxb.2018.0470

基金

国家自然科学基金项目(51478336,51878477)。
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