重组竹钢夹板螺栓连接承载力试验研究
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摘要
螺栓连接因其制作简单、安全可靠和施工方便的优点在现代竹木结构建筑中应用广泛。为研究重组竹钢夹板螺栓连接力学性能,对12组试件进行单轴拉伸试验研究与分析,探讨了厚径比、间距、端距等因素对螺栓连接破坏形态及承载能力的影响规律。研究结果表明:当试件厚径比为5.0～5.7时,单螺栓连接和多螺栓连接破坏形态均表现为单铰屈服模式,当试件厚径比为8.0～10.0时,破坏形态均表现为双铰屈服模式;随着螺栓直径、端距和间距增加,螺栓连接承载力逐渐增加,单列螺栓布置的螺栓连接延性较好,而增加螺栓列数虽然可以提高螺栓连接初始刚度但延性变差;通过将螺栓连接试验结果与国内《木结构设计规范》、《木结构设计手册》和Eurocode 5计算公式计算结果对比分析,国内规范计算结果较为保守,Eurocode 5计算公式具有更好的适用性。
Because of the advantage of the simple fabrication,high security and construction convenience,the bolted connection is widely applied in modern engineered bamboo and wood structures.In order to investigate the mechanical behavior of the bolted steel-Parallel strand bamboo-steel connections,twelve groups of specimens were tested under uniaxial tensile load.The effects of thickness to diameter ratio,fastener spacing and the end distance on the failure modes and the bearing capacity were reported in the paper.The results indicate that the failure mode of single and multi-bolted connections is the occurrence of one plastic hinge when the thickness to diameter ration is 5.0-5.7,and the occurrence of two plastic hinges when the thickness to diameter ration is 8.0-10.0.As the fastener diameter,spacing or the end distance increases,the bearing capacity gradually increases.The bolted connections with one column show good ductility,which gets worse as the number of columns increases.Comparing the experimental results with the calculations using the domestic code for wood structure,wood structure design manual and Eurocode 5,it was found that the domestic code is conservative and the Eurocode 5 has better applicability.
Because of the advantage of the simple fabrication,high security and construction convenience,the bolted connection is widely applied in modern engineered bamboo and wood structures.In order to investigate the mechanical behavior of the bolted steel-Parallel strand bamboo-steel connections,twelve groups of specimens were tested under uniaxial tensile load.The effects of thickness to diameter ratio,fastener spacing and the end distance on the failure modes and the bearing capacity were reported in the paper.The results indicate that the failure mode of single and multi-bolted connections is the occurrence of one plastic hinge when the thickness to diameter ration is 5.0-5.7,and the occurrence of two plastic hinges when the thickness to diameter ration is 8.0-10.0.As the fastener diameter,spacing or the end distance increases,the bearing capacity gradually increases.The bolted connections with one column show good ductility,which gets worse as the number of columns increases.Comparing the experimental results with the calculations using the domestic code for wood structure,wood structure design manual and Eurocode 5,it was found that the domestic code is conservative and the Eurocode 5 has better applicability.
引文
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[5]舒赣平,杜二峰,张欣欣,等.T型钢连接梁柱节点抗火性能试验研究[J].工程力学,2016,33(7):136-143.Shu Ganping,Du Erfeng,Zhang Xinxin,et al.Experimental study on the fire performance of steel beam-column T-stub joints[J].Engineering Mechanics,2016,33(7):136―143.(in Chinese)
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[8]Ozturk M,Saba N,Altay V,et al.Biomass and bioenergy:An overview of the development potential in Turkey and Malaysia[J].Renewable and Sustainable Energy Reviews,2017,79:1285―1302.
[9]Cramer C O.Load distribution in multiple-bolt tension joints[J].Journal of Structural Division,ASCE,1968,94(5):1101―1117.
[10]BS EN 1995-1-1,Eurocode 5:Design of timber structures-Part 1-1:General-common rules and rules for buildings[S].London:British Standards Institution,2004.
[11]徐德良,刘伟庆,周叮,等.胶合木与胶合木螺栓连接力学性能试验研究[J].建筑结构学报,2011,32(7):93―100.Xu Deliang,Liu Weiqing,Zhou Ding,et al.Experimental study of bolted glued timber-to-timber joints[J].Journal of Building Structures,2011,32(7):93―100.(in Chinese)
[12]冯立,肖岩,单波,等.胶合竹结构梁柱螺栓连接节点承载力试验研究[J].建筑结构学报,2014,35(4):230―235.Feng Li,Xiao Yan,Shan Bo,et al.Experimental study on bearing capacity of glubam beam-column bolted joints[J].Journal of Building Structures,2014,35(4):230―235.(in Chinese)
[13]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.Wang Mingqian,Gu Xianglin,Song Xiaobin,et al.Experimental study on bolted glued laminated timber connections with slotted-in steel plates under pure bending and combined shear and bending[J].Journal of Building Structures,2016,37(4):64―72.(in Chinese)
[14]Khalil H P S A,Bhat I U H,Jawaid M,et al.Bamboo fibre reinforced biocomposites:A review[J].Materials and Design,2012,42(1):353―368.
[15]Sharma B,Gatóo A,Bock M,et al.Engineered bamboo for structural applications[J].Construction and Building Materials,2015,81:66―73.
[16]Kumar A,Vlach T,Laiblova L,et al.Engineered bamboo scrimber:Influence of density on the mechanical and water absorption properties[J].Construction and Building Materials,2016,127:815―827.
[17]Xu M,Cui Z Y,Chen Z F,et al.Experimental study on compressive and tensile properties of a bamboo scrimber at elevated temperatures[J].Construction and Building Materials,2017,151:732―741.
[18]崔兆彦,王飞,徐明,等.高温下重组竹顺纹销槽承压强度试验研究[J].东南大学学报(自然科学版),2017,47(6):1174―1179.Cui Zhaoyan,Wang Fei,Xu Ming,et al.Experimental study on embedding strength of bamboo scrimber parallel to grain at high temperatures[J].Journal of Southeast University(National science edition),2017,47(6):1174―1179.(in Chinese)
[19]李霞镇.重组竹螺栓连接节点承载性能研究[D].北京:中国林业科学研究院,2013.Li Xiazhen.Research on the bearing performance of bolt joint for recombinant bamboo[D].Beijing:Chinese Academy of Forestry Sciences,2013.(in Chinese)
[20]周爱萍,黄东升,唐思远,等.重组竹-钢填板螺栓节点承载力试验研究[J].南京工业大学学报(自科科学版),2016,38(5):34―39.Zhou Aiping,Huang Dongsheng,Tang Siyuan,et al.Experimental research on bearing capacity of the bolted PSB-steel-PSB joints[J].Journal of Nanjing Tech University(National science edition),2016,38(5):34―39.(in Chinese)
[21]JG/T 199―2007,建筑用竹材物理力学性能试验方法[S].北京:中国标准出版社,2007.JG/T 199―2007,Testing methods for physical and mechanical properties of bamboo used in building[S].Beijing:Standards Press of China,2007.(in Chinese)
[22]ASTM D143―14,Standard test methods for small clear specimens of timber[S].Philadelphia:American Society for Testing and Materials,2014.
[23]ASTM D5764―97a(2013),Standard test method for evaluating dowel-bearing strength of wood and wood-based products[S].Philadelphia:American Society for Testing and Materials,2013.
[24]ASTM F1575―03,Standard test methods for bolted connections in wood and wood-based products[S].Philadelphia:American Society for Testing and Materials,2003.
[25]ASTM D5652―95,Standard test methods for bolted connections in wood and wood-based products[S].Philadelphia:American Society for Testing and Materials,2007.
[26]Reynolds T,Sharma B,Harries K,et al.Dowelled structural connections in laminated bamboo and timber[J].Composites Part B:Engineering,2016,90(9):232―240.
[27]Jensen J L,Quenneville P,Girhammar U A,et al.Splitting of timber beams loaded perpendicular to grain by connections-Combined effect of edge and end distance[J].Construction and Building Materials,2012,35(10):289―293.
[28]NDS 1997,National design specification for wood construction[S].Washington DC:National Forest Products Assocition,1997.
[29]GB 50005―2003,木结构设计规范[S].北京:中国建筑工业出版社,2003.GB 50005―2003,Timber structures design code[S].Beijing:China Architecture Industry Press,2005.(in Chinese)
[30]木结构设计手册编辑委员会.木结构设计手册[M].3版.北京:中国建筑工业出版社,2005:86―88.The Editorial Board of Wood Structure Design Manual.Wood structure design manual[M].3rd ed.Beijing:China Architecture Industry Press,2005:86―88.(in Chinese)
[2]Jensen J L,Quenneville P.Experimental investigations on row shear and splitting in bolted connections[J].Construction and Building Materials,2011,25(5):2420―2425.
[3]李玉顺,蒋天元,单炜,等.钢-竹组合梁柱边节点拟静力试验研究[J].工程力学,2013,30(4):241―248.Li Yushun,Jiang Tianyuan,Shan Wei,et al.Quasi-static test on steel-bamboo composite beam-column exterior joints[J].Engineering Mechanics,2013,30(4):241―248.(in Chinese)
[4]Xu B H,Boucha?r A,Racher P.Mechanical behavior and modeling of dowelled steel-to-timber moment-resisting connections[J].Journal of Structural Engineering,2015,141(6):04014165.
[5]舒赣平,杜二峰,张欣欣,等.T型钢连接梁柱节点抗火性能试验研究[J].工程力学,2016,33(7):136-143.Shu Ganping,Du Erfeng,Zhang Xinxin,et al.Experimental study on the fire performance of steel beam-column T-stub joints[J].Engineering Mechanics,2016,33(7):136―143.(in Chinese)
[6]杨俊芬,陈雷,程锦鹏,等.一种新型装配式梁柱节点抗性能试验研究[J].工程力学,2017,34(12):75―86.Yang Junfen,Chen Lei,Cheng Jinpeng,et al.Experimental study on seismic behavior of a new type of fully assembled beam-column joints[J].Engineering Mechanics,2017,34(12):75―86.(in Chinese)
[7]Johanson K W.Theory of timber connections[M].Bern:International Association for Bridge and Structural Engineering(IABSE),1949:249―262.
[8]Ozturk M,Saba N,Altay V,et al.Biomass and bioenergy:An overview of the development potential in Turkey and Malaysia[J].Renewable and Sustainable Energy Reviews,2017,79:1285―1302.
[9]Cramer C O.Load distribution in multiple-bolt tension joints[J].Journal of Structural Division,ASCE,1968,94(5):1101―1117.
[10]BS EN 1995-1-1,Eurocode 5:Design of timber structures-Part 1-1:General-common rules and rules for buildings[S].London:British Standards Institution,2004.
[11]徐德良,刘伟庆,周叮,等.胶合木与胶合木螺栓连接力学性能试验研究[J].建筑结构学报,2011,32(7):93―100.Xu Deliang,Liu Weiqing,Zhou Ding,et al.Experimental study of bolted glued timber-to-timber joints[J].Journal of Building Structures,2011,32(7):93―100.(in Chinese)
[12]冯立,肖岩,单波,等.胶合竹结构梁柱螺栓连接节点承载力试验研究[J].建筑结构学报,2014,35(4):230―235.Feng Li,Xiao Yan,Shan Bo,et al.Experimental study on bearing capacity of glubam beam-column bolted joints[J].Journal of Building Structures,2014,35(4):230―235.(in Chinese)
[13]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.Wang Mingqian,Gu Xianglin,Song Xiaobin,et al.Experimental study on bolted glued laminated timber connections with slotted-in steel plates under pure bending and combined shear and bending[J].Journal of Building Structures,2016,37(4):64―72.(in Chinese)
[14]Khalil H P S A,Bhat I U H,Jawaid M,et al.Bamboo fibre reinforced biocomposites:A review[J].Materials and Design,2012,42(1):353―368.
[15]Sharma B,Gatóo A,Bock M,et al.Engineered bamboo for structural applications[J].Construction and Building Materials,2015,81:66―73.
[16]Kumar A,Vlach T,Laiblova L,et al.Engineered bamboo scrimber:Influence of density on the mechanical and water absorption properties[J].Construction and Building Materials,2016,127:815―827.
[17]Xu M,Cui Z Y,Chen Z F,et al.Experimental study on compressive and tensile properties of a bamboo scrimber at elevated temperatures[J].Construction and Building Materials,2017,151:732―741.
[18]崔兆彦,王飞,徐明,等.高温下重组竹顺纹销槽承压强度试验研究[J].东南大学学报(自然科学版),2017,47(6):1174―1179.Cui Zhaoyan,Wang Fei,Xu Ming,et al.Experimental study on embedding strength of bamboo scrimber parallel to grain at high temperatures[J].Journal of Southeast University(National science edition),2017,47(6):1174―1179.(in Chinese)
[19]李霞镇.重组竹螺栓连接节点承载性能研究[D].北京:中国林业科学研究院,2013.Li Xiazhen.Research on the bearing performance of bolt joint for recombinant bamboo[D].Beijing:Chinese Academy of Forestry Sciences,2013.(in Chinese)
[20]周爱萍,黄东升,唐思远,等.重组竹-钢填板螺栓节点承载力试验研究[J].南京工业大学学报(自科科学版),2016,38(5):34―39.Zhou Aiping,Huang Dongsheng,Tang Siyuan,et al.Experimental research on bearing capacity of the bolted PSB-steel-PSB joints[J].Journal of Nanjing Tech University(National science edition),2016,38(5):34―39.(in Chinese)
[21]JG/T 199―2007,建筑用竹材物理力学性能试验方法[S].北京:中国标准出版社,2007.JG/T 199―2007,Testing methods for physical and mechanical properties of bamboo used in building[S].Beijing:Standards Press of China,2007.(in Chinese)
[22]ASTM D143―14,Standard test methods for small clear specimens of timber[S].Philadelphia:American Society for Testing and Materials,2014.
[23]ASTM D5764―97a(2013),Standard test method for evaluating dowel-bearing strength of wood and wood-based products[S].Philadelphia:American Society for Testing and Materials,2013.
[24]ASTM F1575―03,Standard test methods for bolted connections in wood and wood-based products[S].Philadelphia:American Society for Testing and Materials,2003.
[25]ASTM D5652―95,Standard test methods for bolted connections in wood and wood-based products[S].Philadelphia:American Society for Testing and Materials,2007.
[26]Reynolds T,Sharma B,Harries K,et al.Dowelled structural connections in laminated bamboo and timber[J].Composites Part B:Engineering,2016,90(9):232―240.
[27]Jensen J L,Quenneville P,Girhammar U A,et al.Splitting of timber beams loaded perpendicular to grain by connections-Combined effect of edge and end distance[J].Construction and Building Materials,2012,35(10):289―293.
[28]NDS 1997,National design specification for wood construction[S].Washington DC:National Forest Products Assocition,1997.
[29]GB 50005―2003,木结构设计规范[S].北京:中国建筑工业出版社,2003.GB 50005―2003,Timber structures design code[S].Beijing:China Architecture Industry Press,2005.(in Chinese)
[30]木结构设计手册编辑委员会.木结构设计手册[M].3版.北京:中国建筑工业出版社,2005:86―88.The Editorial Board of Wood Structure Design Manual.Wood structure design manual[M].3rd ed.Beijing:China Architecture Industry Press,2005:86―88.(in Chinese)