贯穿式加劲肋对螺栓连接钢管节点轴压承载力影响的试验研究
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摘要
各国现行钢结构规范中,对螺栓连接钢管节点的极限承载力均未提及具体的构造措施及计算方法。通过对8个带加劲肋的螺栓连接钢管节点试件进行了单轴受压承载力试验研究,探讨了该类节点在单轴受压条件下的承载力-变形曲线和破坏模式,并对环板、主管及支管的应力-应变情况进行了分析。研究表明:仅通过单轴试验就推出所有破坏模式过于武断,建议限定说明,使其更合理;采用环板、十字连接板对支管与主管进行螺栓连接并设置加劲肋的钢管节点,其破坏模式为环板局部面外失稳,设置加劲肋能有效抑制整体的面外失稳;其次,加劲肋板贯穿主管可以提高节点的整体刚度和极限承载力,且施工方便,是值得采用的节点设计方法之一。
In the current steel design codes at home and abroad,the calculation method for the ultimate strength of a steel tubular joint with bolted connection has not been specified in detail. In the paper,the failure mode and the loaddisplacement behavior of 8 full-scale steel tubular joints with bolted connection subject to uniaxial compression were investigated experimentally. Moreover,the stress-strain distribution of annular plate,main chord and branch tube,were also discussed. The results showed that the failure mode of the steel tubular joint with bolted connection that using branch tube and main chord and installed rib stiffeners by annular plate and cross-connecting plate was local buckling. And the rib stiffener might effectively prevent the out-of-plane buckling of whole joint. The rib stiffener penetrating the main chord could improve the stiffness and ultimate strength of the steel tubular joint,and make construction convenient,which is worthy adopting as one of the joint design methods.
In the current steel design codes at home and abroad,the calculation method for the ultimate strength of a steel tubular joint with bolted connection has not been specified in detail. In the paper,the failure mode and the loaddisplacement behavior of 8 full-scale steel tubular joints with bolted connection subject to uniaxial compression were investigated experimentally. Moreover,the stress-strain distribution of annular plate,main chord and branch tube,were also discussed. The results showed that the failure mode of the steel tubular joint with bolted connection that using branch tube and main chord and installed rib stiffeners by annular plate and cross-connecting plate was local buckling. And the rib stiffener might effectively prevent the out-of-plane buckling of whole joint. The rib stiffener penetrating the main chord could improve the stiffness and ultimate strength of the steel tubular joint,and make construction convenient,which is worthy adopting as one of the joint design methods.
引文
[1]国家电网公司.输电线路钢管塔构造设计规定:Q/GDW1391-2015[S].北京:中国电力出版社,2016.
[2]国家能源局.架空输电线路杆塔结构设计技术规定:DL/T5154-2012[S].北京:中国计划出版社,2012.
[3]国家能源局.架空输电线路钢管塔设计技术规定:DL/T5254-2010[S].北京:中国电力出版社,2011.
[4]KIM W B.Ultimate Strength of Tube-Gusset Plate Connections Considering Eccentricity[J].Engineering Structures,2001(23):1418-1426.
[5]CHOO Y S,QIAN X D,LIEW J Y R,et al.Static Strength of Thick-Walled CHS X-Joints-PartⅡ.Effect of Chord Stresses[J].Journal of Constructional Steel Research,2003,59:1229-1250.
[6]CHOO Y S,QIAN X D,WARDENIER J.Effects of Boundary Conditions and Chord Stresses on Static Strength of Thick-Walled CHS K-Joints[J].Journal of Constructional Steel Research,2006,62:316-328.
[7]FESSLER H,MOCKFORD P B,WEBSTER J J.Parametric Equations for the Flexibility Matrices of Single Brace Tubular Joints in Offshore Structures[J].Proceedings of the Institution of Civil Engineers,1986,81(4):659-673.
[8]FESSLER H,MOCKFORD P B,WEBSTER J J.Parametric Equations for the Flexibility Matrices of Multi-Brace Tubular Joints in Offshore Structures[J].Proceedings of the Institution of Civil Engineers,1986,81(4):675-696.
[9]陈以一,沈祖炎,虞晓华.大直径钢管节点极限承载力的试验及分析[J].工程力学,1996(增刊):51-55.
[10]PAUL J C,MAKINO Y,KUROBANE Y.Ultimate Resistance of Unstiffened Multiplanar Tubular TT-and KK-Joints[J].Struct.Engrg.,ASCE,1994,120(10):2853-2870.
[11]COFER W F,JUBRAN J S.Analysis of Welded Tubular Connections Using Continuum Damage Mechanics[J].Struct.Engrg.,ASCE,1994,118(3):828-845.
[12]KANG C T,MOFFAT D G,MISTRY J.Strength of DT Tubular Joints with Brace and Chord Compression[J].Struct.Engrg.,ASCE,1998,124(7):775-783.
[13]朱世哲,罗尧治,娄荣.双拱结构X型钢管相贯节点试验研究[J].浙江大学学报(工学版),2008,42(1):99-104.
[14]李启才,顾强,苏明周,等.摩擦型高强螺栓连接性能的试验研究[J].西安科技学院学报,2003,23(3):322-324.
[15]程睿,黄宗明,孔必祥,等.单角钢连接节点板受压性能试验研究与承载力计算方法[J].建筑结构学报,2009,30(4):61-68.
[16]施刚,石永久,王元清,等.多层钢框架半刚性端板连接的试验研究[J].清华大学学报(自然科学版),2004,44(3):391-394.
[17]李龙.Q460高强角钢螺栓抗剪连接受力性能试验研究[D].西安:西安建筑科技大学,2010.
[18]王群.钢结构高强度螺栓连接应用范围的探讨[J].钢结构,2007,22(10):76-78.
[2]国家能源局.架空输电线路杆塔结构设计技术规定:DL/T5154-2012[S].北京:中国计划出版社,2012.
[3]国家能源局.架空输电线路钢管塔设计技术规定:DL/T5254-2010[S].北京:中国电力出版社,2011.
[4]KIM W B.Ultimate Strength of Tube-Gusset Plate Connections Considering Eccentricity[J].Engineering Structures,2001(23):1418-1426.
[5]CHOO Y S,QIAN X D,LIEW J Y R,et al.Static Strength of Thick-Walled CHS X-Joints-PartⅡ.Effect of Chord Stresses[J].Journal of Constructional Steel Research,2003,59:1229-1250.
[6]CHOO Y S,QIAN X D,WARDENIER J.Effects of Boundary Conditions and Chord Stresses on Static Strength of Thick-Walled CHS K-Joints[J].Journal of Constructional Steel Research,2006,62:316-328.
[7]FESSLER H,MOCKFORD P B,WEBSTER J J.Parametric Equations for the Flexibility Matrices of Single Brace Tubular Joints in Offshore Structures[J].Proceedings of the Institution of Civil Engineers,1986,81(4):659-673.
[8]FESSLER H,MOCKFORD P B,WEBSTER J J.Parametric Equations for the Flexibility Matrices of Multi-Brace Tubular Joints in Offshore Structures[J].Proceedings of the Institution of Civil Engineers,1986,81(4):675-696.
[9]陈以一,沈祖炎,虞晓华.大直径钢管节点极限承载力的试验及分析[J].工程力学,1996(增刊):51-55.
[10]PAUL J C,MAKINO Y,KUROBANE Y.Ultimate Resistance of Unstiffened Multiplanar Tubular TT-and KK-Joints[J].Struct.Engrg.,ASCE,1994,120(10):2853-2870.
[11]COFER W F,JUBRAN J S.Analysis of Welded Tubular Connections Using Continuum Damage Mechanics[J].Struct.Engrg.,ASCE,1994,118(3):828-845.
[12]KANG C T,MOFFAT D G,MISTRY J.Strength of DT Tubular Joints with Brace and Chord Compression[J].Struct.Engrg.,ASCE,1998,124(7):775-783.
[13]朱世哲,罗尧治,娄荣.双拱结构X型钢管相贯节点试验研究[J].浙江大学学报(工学版),2008,42(1):99-104.
[14]李启才,顾强,苏明周,等.摩擦型高强螺栓连接性能的试验研究[J].西安科技学院学报,2003,23(3):322-324.
[15]程睿,黄宗明,孔必祥,等.单角钢连接节点板受压性能试验研究与承载力计算方法[J].建筑结构学报,2009,30(4):61-68.
[16]施刚,石永久,王元清,等.多层钢框架半刚性端板连接的试验研究[J].清华大学学报(自然科学版),2004,44(3):391-394.
[17]李龙.Q460高强角钢螺栓抗剪连接受力性能试验研究[D].西安:西安建筑科技大学,2010.
[18]王群.钢结构高强度螺栓连接应用范围的探讨[J].钢结构,2007,22(10):76-78.