基于粘性区模型的胶合木梁柱节点开裂研究
引用文献：
陈丽 张亚芬. 基于粘性区模型的胶合木梁柱节点开裂研究[J]. 建筑结构，2022，48（12）：36-40，30.
CHEN Li ZHANG Yafen. Research on cracking of glulam beam-to-column joints based on cohesive zone model[J]. Building Structure，2022,48（12）：36-40，30.
摘要：通过数值模拟的方法，采用粘性区模型(cohesive zone model, CZM)研究了胶合木梁柱内嵌钢板-螺栓连接节点在单调荷载作用下的力学行为和开裂位移。在CZM中，通过横纹拉伸破坏(模式Ⅰ)、顺纹剪切破坏(模式Ⅱ)和两者的混合破坏模式(模式m)三种不同的模式，模拟了胶合木梁柱节点的横纹拉伸强度和顺纹剪切强度。结果表明，当加载位移达到1.2Δ～1.6Δ(Δ=90mm)时，胶合木梁柱节点上部，在木材顺纹方向沿两排螺栓连线位置发生横纹劈裂破坏。将数值模拟结果和已有试验结果进行了对比分析，发现二者具有很好的一致性，证明CZM在模拟胶合木梁柱节点的力学行为和开裂位移方面具有很好的适用性。
关键词：粘性区模型；胶合木；梁柱节点；内嵌钢板；开裂
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[10] 奚爱峰，刘伟庆，杨会峰，等.木材-钢填板螺栓连接节点结构性能试验研究[J].江苏建筑，2009(5):12-14,96.
[11] 王明谦，顾祥林，宋晓滨，等.胶合木梁柱嵌入钢板-螺栓拼接节点纯弯与弯剪性能试验研究[J].建筑结构学报，2016,37(4):64-72.
[12] 陆伟东，孙洪锋，刘伟庆.自攻螺钉增强胶合木梁柱螺栓节点受力性能试验研究[J].建筑结构学报，2016,37(4):80-86.
[13] CUI W C,WISNOM M R,JONES M.A comparison of failure criteria to predict delamination of unidirectional glass/epoxy specimens waisted through the thickness[J].Composites,1992,23(3):158-166.
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[15] WANG M Q,SONG X B,GU X L,et al.Rotational behavior of bolted beam-to-column connections with locally cross-laminated glulam[J].Journal of Structural Engineering,2015,141(4):04014121.
[2] 何敏娟，何桂荣，梁峰，等.中国木结构近20年发展历程[J].建筑结构，2019,49(19):83-90.
[3] 王明谦，宋晓滨，顾祥林，等.胶合木梁柱螺栓-钢填板节点转动性能研究[J].建筑结构学报，2014,35(9):141-150.
[4] BICKERDIKE M K.Predicting the row shear failure mode and strength of bolted timber connections loaded parallel-to-grain[D].Ontario:Royal Military College of Canada,2006:120-125.
[5] PETERSEN D R,LINK R E,PATTON-MALLORY M,et al.Qualitative assessment of failure in bolted connections:maximum stress criterion[J].Journal of Testing and Evaluation,1998,26(5):497-505.
[6] MOSES D M,PRION H G L.A three-dimensional model for bolted connections in wood[J].Canadian Journal of Civil Engineering,2003,30(3):555-567.
[7] XU B H,BOUCHAÏR A,TAAZOUNT M,et al.Numerical and experimental analyses of multiple-dowel steel-to-timber joints in tension perpendicular to grain[J].Engineering Structures,2009,31(10):2357-2367.
[8] HE M J,TIAN H,ZHAO Y.Experimental study and rotational stiffness analysis of bolted timber connection[C]//2011 International Conference on Multi-media Technology (ICMT ).Piscataway,2011:3959-3963.
[9] 徐德良，刘伟庆，杨会峰，等.木材-钢填板螺栓连接的承载能力试验研究[J].南京工业大学学报(自然科学版),2009,31(1):87-91,96.
[10] 奚爱峰，刘伟庆，杨会峰，等.木材-钢填板螺栓连接节点结构性能试验研究[J].江苏建筑，2009(5):12-14,96.
[11] 王明谦，顾祥林，宋晓滨，等.胶合木梁柱嵌入钢板-螺栓拼接节点纯弯与弯剪性能试验研究[J].建筑结构学报，2016,37(4):64-72.
[12] 陆伟东，孙洪锋，刘伟庆.自攻螺钉增强胶合木梁柱螺栓节点受力性能试验研究[J].建筑结构学报，2016,37(4):80-86.
[13] CUI W C,WISNOM M R,JONES M.A comparison of failure criteria to predict delamination of unidirectional glass/epoxy specimens waisted through the thickness[J].Composites,1992,23(3):158-166.
[14] BENZEGGAGH M L,KENANE M.Measurement of mixed-mode delamination fracture toughness of unidirectional glass/epoxy composites with mixed-mode bending apparatus[J].Composites Science and Technology,1996,56(4):439-449.
[15] WANG M Q,SONG X B,GU X L,et al.Rotational behavior of bolted beam-to-column connections with locally cross-laminated glulam[J].Journal of Structural Engineering,2015,141(4):04014121.
Research on cracking of glulam beam-to-column joints based on cohesive zone model
Abstract: The cohesive zone model(CZM) was used to study the mechanical behavior and cracking displacement of the bolted glulam beam-to-column joints with slotted-in steel plates under monotonic loading through means of numerical simulation. In the CZM, the cross-grain tensile strength and along-grain shear strength of the glulam beam-to-column joints were simulated through three different modes: cross-grain tensile failure(model Ⅰ), along-grain shear failure(model Ⅱ) and the mixed failure model of them(model m). The results show that when the loading displacement reaches 1.2Δ～1.6Δ(Δ=90 mm), the upper part of the glulam beam-to-column joints will undergo transverse splitting and failure along the line of the two rows of bolts in the direction of the glulam grain. The numerical simulation results and the existing experimental results were compared and analyzed, and it is found that the two are in good agreement, which proves that CZM has good applicability in simulating the mechanical behavior and cracking displacement of glulam beam-column joints.
Keywords: cohesive zone model(CZM); glulam; beam-to-column joints; slotted-in steel plate; crack
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