定向结构刨花板增强木桁架受弯性能试验研究
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摘要
为了使木桁架能用作大截面木梁,在木桁架两侧采用定向结构刨花板(OSB)来增强木桁架。增强型木桁架的抗弯承载性能试验表明:采用OSB增强木桁架能有效提高其抗弯承载能力;采用OSB,通过螺纹钉连接及联合胶结方式补强木桁架,结合牢靠,有较好的协同性及整体稳定性,其初始抗弯刚度及抗弯极限荷载分别提高203. 20%、234. 39%;增强型木桁架截面宽度对极限抗弯荷载及初始抗弯刚度贡献较小;增强型木桁架相比传统普通齿板连接木桁架,连接方式简单、木材用料少、不需齿板辊压机械、便于现场施工,可应用于木结构工程。
In order to make wood truss be used as a large section timber beam,oriented strand board( OSB) was used to reinforce the timber truss by applying OSB on both sides of the timber truss. The flexural behavior of wood struss was studied in the paper. The results showed that using OSB to strengthen wood truss was an effective technical means to improve its flexural bearing capacity. OSB and wood truss could be combined firmly by using screw connection and glue bonding. And the reinforced wood trusses had good synergy and overall stability. Their initial bending stiffness and ultimate bending load were increased by 203. 20% and 234. 39% respectively. The width of reinforced wood trusses had less contribution to the ultimate bending load and initial bending stiffness. Compared with traditional wood truss,the reinforced wood truss could be used in timber engineering with virtue of simple connection mode,low wood consumption,no rolling machine and easy fabrication.
In order to make wood truss be used as a large section timber beam,oriented strand board( OSB) was used to reinforce the timber truss by applying OSB on both sides of the timber truss. The flexural behavior of wood struss was studied in the paper. The results showed that using OSB to strengthen wood truss was an effective technical means to improve its flexural bearing capacity. OSB and wood truss could be combined firmly by using screw connection and glue bonding. And the reinforced wood trusses had good synergy and overall stability. Their initial bending stiffness and ultimate bending load were increased by 203. 20% and 234. 39% respectively. The width of reinforced wood trusses had less contribution to the ultimate bending load and initial bending stiffness. Compared with traditional wood truss,the reinforced wood truss could be used in timber engineering with virtue of simple connection mode,low wood consumption,no rolling machine and easy fabrication.
引文
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[18]潘景龙,祝恩淳.木结构设计原理[M].北京:中国建筑工业出版社,2009.
[2]XIAO J Y,LAN M,QI Z.Screw Connection in Wood Members and WPC Members[J].Wood Research,2018,63(5):833-841.
[3]马澜,杨小军,郁岗,等.木塑建筑墙体隔声性能试验研究[J].林产工业,2018,45(12):16-21,28.
[4]杨小军,马澜,赵琦,等.交变荷载下木构件增强端部钉节点抗剪性能[J].中南林业科技大学学报,2018,38(8):116-121,128.
[5]周先雁,曹磊,曾丹,等.胶合木梁抗弯承载力分析[J].建筑结构,2015,45(22):91-96.
[6]贾彬,刘睿,蒙奈庆.碳纤维布加固损伤旧木梁受弯承载力研究[J].工程抗震与加固改造,2013,35(3):112-129.
[7]ALFREDO S R,ABLIO M P DE J,ANTNIO M L.Study of Strengthening Solutions for Glued-Laminated Wood Beams of Maritime Pine Wood[J].Construction and Building Materials,2009,23:2738-2745.
[8]GHANEH M,BEHBOOD M,GHANBAR E.Glulam Beam Made from Hydrothermally Treated Poplar Wood with Reduced Moisture Induced Stresses[J].Construction and Building Materials,2017,135:386-393.
[9]许晓梁,马人乐,何敏娟.轻型木桁架静力试验及承载能力分析[J].特种结构,2006,23(1):1-4.
[10]黄浩,何敏娟,周淑荣,等.轻型木桁架体系系统效应分析[J].沈阳工业大学学报,2011,33(3):343-348.
[11]XIAO B S,FRANK L.Stability Analysis of Metal-PlateConnected Wood Truss Assemblies[J].Journal of Structural Engineering,2012,138(9):1110-1119.
[12]WU Y,XIAO Y.Steel and Glubam Hybrid Space Truss[J].Engineering Structures,2018,171:140-153.
[13]FARROW C B.Evaluation of a Prototypical Mechanical Wood Truss Ladder[J].Automation in Construction,2009,18:1114-1122.
[14]中华人民共和国住房和城乡建设部.轻型木桁架技术规范:JGJ/T 265-2012[S].北京:中国建筑工业出版社,2012.
[15]中华人民共和国住房和城乡建设部.木结构试验方法标准:GB 50329-2012[S].北京:中国建筑工业出版社,2012.
[16]中华人民共和国住房和城乡建设部.木结构设计标准:GB50005-2017[S].北京:中国建筑工业出版社,2018.
[17]杨会峰,凌志彬,刘伟庆,等.单调与低周反复荷载作用下胶合木梁柱延性抗弯节点试验研究[J].建筑结构学报,2015,36(10):131-138.
[18]潘景龙,祝恩淳.木结构设计原理[M].北京:中国建筑工业出版社,2009.