螺栓连接滑移对输电铁塔力学性能的影响研究
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摘要
为了施工和安装方便,输电铁塔节点构造时多采用普通螺栓连接,螺栓预紧力较小,容易产生螺栓连接滑移。对于输电铁塔这种超静定结构,螺栓连接滑移将影响构件的内力分布和铁塔的整体刚度特征。采用一种简化的螺栓连接滑移模型,在输电铁塔分析时引入了螺栓连接滑移的影响,分别对5种不同载荷工况下螺栓连接滑移对构件内力及铁塔整体位移的影响进行了研究。结果表明:当铁塔整体受到以弯曲为主的载荷作用时,螺栓连接滑移对整个铁塔变形的影响不大;而当铁塔整体受到以扭转为主的载荷作用时,螺栓连接滑移对铁塔变形影响很大;螺栓连接滑移对构件内力的影响随着载荷工况的不同而变化,但影响最大的杆件均位于塔头位置。
In order to facilitate the construction and installation,traditionally ordinary bolts are preferred to be used in transmission tower.As the bolt diameters are small and members joined are thin so relatively small clamping force is commonly and greater slippage is likely to occur at load.For the indeterminate structure like lattice transmission tower,bolted joint slippage will led to redistribute of inner force and increase displacement.Therefore,it is important to research the bolted joint slippage load in lattice transmission tower.In this paper,a simplified ideal slippage model of bolted joints is presented,and two different models with and without considering the joint slippage effects are given.The influence of joint slippage on the inner forces and displacement of transmission tower are analysed under five different load cases.The results show that the effects of joint slippage on the displacement of tower is smaller when the tower suffering from bending loads,however the joint slippage effects can not be neglected when the tower suffering from torque loads.The results also show that the joint slippage effects on the inner force are different under different load cases,but the biggest effects are always locate on the tower head for all the load cases.
In order to facilitate the construction and installation,traditionally ordinary bolts are preferred to be used in transmission tower.As the bolt diameters are small and members joined are thin so relatively small clamping force is commonly and greater slippage is likely to occur at load.For the indeterminate structure like lattice transmission tower,bolted joint slippage will led to redistribute of inner force and increase displacement.Therefore,it is important to research the bolted joint slippage load in lattice transmission tower.In this paper,a simplified ideal slippage model of bolted joints is presented,and two different models with and without considering the joint slippage effects are given.The influence of joint slippage on the inner forces and displacement of transmission tower are analysed under five different load cases.The results show that the effects of joint slippage on the displacement of tower is smaller when the tower suffering from bending loads,however the joint slippage effects can not be neglected when the tower suffering from torque loads.The results also show that the joint slippage effects on the inner force are different under different load cases,but the biggest effects are always locate on the tower head for all the load cases.
引文
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[3]S Kitipornchai,F ASCE,F G A Al-Bermani,et al.Effect of bolt slippage on ultimate behavior of latticestructures[J].Journal of Structural Engineering,1994,120(8):22812287.
[4]N Ungkurapinan.Joint slip in steel electric transmissiontowers[J].Engineering Structures,2003,25(6):779 788.
[5]徐建设,陈以一,韩琳,等.普通螺栓和承压型高强螺栓抗剪连接滑移过程[J].同济大学学报,2003,31(5):510514.
[6]张殿生.电力工程高压送电线路设计手册(第二版)[M].北京:中国电力出版社,2003.
[7]中华人民共和国国家标准.GB502332005110～500kV架空送电线路施工及验收规范[S].
[8]濮良贵,纪明刚.机械设计[M].北京:高等教育出版社,1996.
[9]中华人民共和国国家标准.GB500172003钢结构设计规范[S].2003.
[10]Witer G.Tests on bolted connection in light gage steel[J].Journal of the Structural Division,Proceedings ofthe American Society of Civil Engineers,1956,82:920921.
[11]John B,George R.Ultimate capacity of single bolted an-gle connections[J].Journal of the Structural Division,1969,95(ST8):16451660.
[12]Ungkurapinan N.A study of joint slip in galvanized boltedangle connections[D].Canada:University ofManitoba,2000.
[13]王肇民,马人乐.塔式结构[M].北京:科学出版社,2004.
[14]刘振亚.国家电网公司输变电工程典型设计-500kV输电线路分册[M].北京:中国电力出版社,2005.
[15]中华人民共和国电力行业标准.DL/T51542002架空送电线路杆塔结构设计技术规定[S].2002.
[2]Marjerrison M M.Electric transmission tower design[J].Journal of the Structural Division,Proceedings ofthe American Society of Civil Engineers,1968,94(p01):123.
[3]S Kitipornchai,F ASCE,F G A Al-Bermani,et al.Effect of bolt slippage on ultimate behavior of latticestructures[J].Journal of Structural Engineering,1994,120(8):22812287.
[4]N Ungkurapinan.Joint slip in steel electric transmissiontowers[J].Engineering Structures,2003,25(6):779 788.
[5]徐建设,陈以一,韩琳,等.普通螺栓和承压型高强螺栓抗剪连接滑移过程[J].同济大学学报,2003,31(5):510514.
[6]张殿生.电力工程高压送电线路设计手册(第二版)[M].北京:中国电力出版社,2003.
[7]中华人民共和国国家标准.GB502332005110～500kV架空送电线路施工及验收规范[S].
[8]濮良贵,纪明刚.机械设计[M].北京:高等教育出版社,1996.
[9]中华人民共和国国家标准.GB500172003钢结构设计规范[S].2003.
[10]Witer G.Tests on bolted connection in light gage steel[J].Journal of the Structural Division,Proceedings ofthe American Society of Civil Engineers,1956,82:920921.
[11]John B,George R.Ultimate capacity of single bolted an-gle connections[J].Journal of the Structural Division,1969,95(ST8):16451660.
[12]Ungkurapinan N.A study of joint slip in galvanized boltedangle connections[D].Canada:University ofManitoba,2000.
[13]王肇民,马人乐.塔式结构[M].北京:科学出版社,2004.
[14]刘振亚.国家电网公司输变电工程典型设计-500kV输电线路分册[M].北京:中国电力出版社,2005.
[15]中华人民共和国电力行业标准.DL/T51542002架空送电线路杆塔结构设计技术规定[S].2002.