海上风机基础灌浆连接段抗震性能试验
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摘要
海上风机在使用期间可能会受到地震荷载的作用,因此需研究灌浆连接段在不同轴压比下受低周反复荷载作用的滞回性能。对3根不同轴压比的灌浆连接段试件进行低周反复加载试验,研究灌浆连接段试件在低周反复荷载下的破坏模式、滞回曲线、延性与耗能及强度与刚度衰减等抗震性能。试验结果表明:在低周反复荷载下灌浆连接段的最终破坏模式为底部钢管的鼓屈破坏,伴随着浆体不同程度的开裂和剪力键的压碎;灌浆连接段试件滞回曲线饱满,具有良好的耗能能力及延性;随着轴压比的增大,灌浆连接段试件水平极限承载力下降,位移延性和耗能能力不断下降。
Offshore wind turbine in service may be subjected to seismic load, so it is necessary to analyze the hysteresis behavior of grouted connections with different axial compression ratios under low cyclic loading. An experiment was carried out on three grouted connection specimens with different axial compression ratios under cyclic load to study the failure patterns of the grouted connection specimens, in which seismic behaviors of hysteretic curves, energy dissipation, strength and stiffness degradation, as well as ductility of the specimens are analyzed. The result shows that the failure of the grouted connection accords with the level of grout fracture on the local buckling at the lower end of the outer tube. All grouted connection specimens exhibited favorable energy dissipation and ductility, even for the specimens under high axial load. The higher the axial compression increases, the lower the lateral ultimate strength of the grouted connection becomes. The ductility in displacement and the capacity of energy dissipation also decreases in such case.
Offshore wind turbine in service may be subjected to seismic load, so it is necessary to analyze the hysteresis behavior of grouted connections with different axial compression ratios under low cyclic loading. An experiment was carried out on three grouted connection specimens with different axial compression ratios under cyclic load to study the failure patterns of the grouted connection specimens, in which seismic behaviors of hysteretic curves, energy dissipation, strength and stiffness degradation, as well as ductility of the specimens are analyzed. The result shows that the failure of the grouted connection accords with the level of grout fracture on the local buckling at the lower end of the outer tube. All grouted connection specimens exhibited favorable energy dissipation and ductility, even for the specimens under high axial load. The higher the axial compression increases, the lower the lateral ultimate strength of the grouted connection becomes. The ductility in displacement and the capacity of energy dissipation also decreases in such case.
引文
[1]BILLINGTON C J,LEWIS H G.The strength of large diameter grouted connections[C]//The 10th offshore technology conference,Houston,1978:291-301.
[2]BILLINGTON C J,TEBBETT I E.The basis for new design formulae for grouted jacket to pile connections[C]//The 12th offshore technology conference,Houston,1980:449-458.
[3]ANDERSEN M S,PETERSEN P.Structural design of grouted connection in offshore steel monopile foundations[C]//Global Wind Power Conference.Chicago,United States:American Wind Energy Association,Washington.DC(US),2004.
[4]WILKE F.Load bearing behaviour of grouted joints subjected to predominant bending[D].Hannover:Leibniz University,2014.
[5]LOTSBERG I.Structural mechanics for design of grouted connections in monopile wind turbine structures[J].Marine Structures,2013,32(6):113-135.
[6]陈涛,张持海,赵淇,等.海上风机基础灌浆连接段压弯性能试验研究[J].海洋工程,2017,35(3):112-118.
[7]赵淇,陈涛,王衔,等.海上风机导管架支撑结构灌浆连接段数值分析[J].结构工程师,2016,32(5):59-64.
[8]王震,蒋首超,张洁.预应力灌浆套管连接的结构性能研究[J].建筑钢结构进展,2010,12(6):11-18.
[9]王榕.固定平台桩腿强度分析[J].船舶与海洋工程,2015,31(6):34-37.
[10]韩林海,陶忠,阎维波.圆钢管混凝土压弯构件荷载一位移滞回性能分析[J].地震工程与工程振动,2001,21(1):64-73.
[11]吕西林,陆伟东.反复荷载作用下方钢管混凝土柱的抗震性能试验研究[J].建筑结构学报,2000,21(2):2-11.
[12]黄一杰,肖建庄.钢管再生混凝土柱抗震性能与损伤评价[J].同济大学学报(自然科学版),2013,41(3):330-335.
[13]林震宇,沈祖炎,罗金辉.反复荷载作用下L形钢管混凝土柱滞回性能研究[J].建筑钢结构进展,2009,11(2):12-17.
[14]聂建国,王宇航,樊健生.钢管混凝土柱在纯扭和压扭荷载下的抗震性能研究[J].土木工程学报,2014,47(1):47-58.
[15]仲伟秋,张宏民.海洋风电轴向低周反复荷载数值仿真探究[J].低温建筑技术,2014(6):83-86.
[16]BSI.Testing hardened concrete-Part 3:Compressive strength of test specimens:BSEN 12390-3:2009[S].London:British Standard Press,2009.
[17]国家质量监督检验检疫总局.普通混凝土力学性能试验方法标准:GB/T 50081-2002[S].北京:中国建筑工业出版社,2003.
[18]中华人民共和国建设部,国家质量监督检验检疫总局.金属材料室内拉伸试验方法:GB/T228-2002[S].北京:国家标准出版社,2002.
[19]PARK R.Ductility evaluation from laboratory and analytical testing[C]//Proceedings of the 9th World Conference on Earthquake Engineering,1988.
[20]中国建筑科学研究院.建筑抗震试验方法规程:JGJ 101-1996[S].1997.
[2]BILLINGTON C J,TEBBETT I E.The basis for new design formulae for grouted jacket to pile connections[C]//The 12th offshore technology conference,Houston,1980:449-458.
[3]ANDERSEN M S,PETERSEN P.Structural design of grouted connection in offshore steel monopile foundations[C]//Global Wind Power Conference.Chicago,United States:American Wind Energy Association,Washington.DC(US),2004.
[4]WILKE F.Load bearing behaviour of grouted joints subjected to predominant bending[D].Hannover:Leibniz University,2014.
[5]LOTSBERG I.Structural mechanics for design of grouted connections in monopile wind turbine structures[J].Marine Structures,2013,32(6):113-135.
[6]陈涛,张持海,赵淇,等.海上风机基础灌浆连接段压弯性能试验研究[J].海洋工程,2017,35(3):112-118.
[7]赵淇,陈涛,王衔,等.海上风机导管架支撑结构灌浆连接段数值分析[J].结构工程师,2016,32(5):59-64.
[8]王震,蒋首超,张洁.预应力灌浆套管连接的结构性能研究[J].建筑钢结构进展,2010,12(6):11-18.
[9]王榕.固定平台桩腿强度分析[J].船舶与海洋工程,2015,31(6):34-37.
[10]韩林海,陶忠,阎维波.圆钢管混凝土压弯构件荷载一位移滞回性能分析[J].地震工程与工程振动,2001,21(1):64-73.
[11]吕西林,陆伟东.反复荷载作用下方钢管混凝土柱的抗震性能试验研究[J].建筑结构学报,2000,21(2):2-11.
[12]黄一杰,肖建庄.钢管再生混凝土柱抗震性能与损伤评价[J].同济大学学报(自然科学版),2013,41(3):330-335.
[13]林震宇,沈祖炎,罗金辉.反复荷载作用下L形钢管混凝土柱滞回性能研究[J].建筑钢结构进展,2009,11(2):12-17.
[14]聂建国,王宇航,樊健生.钢管混凝土柱在纯扭和压扭荷载下的抗震性能研究[J].土木工程学报,2014,47(1):47-58.
[15]仲伟秋,张宏民.海洋风电轴向低周反复荷载数值仿真探究[J].低温建筑技术,2014(6):83-86.
[16]BSI.Testing hardened concrete-Part 3:Compressive strength of test specimens:BSEN 12390-3:2009[S].London:British Standard Press,2009.
[17]国家质量监督检验检疫总局.普通混凝土力学性能试验方法标准:GB/T 50081-2002[S].北京:中国建筑工业出版社,2003.
[18]中华人民共和国建设部,国家质量监督检验检疫总局.金属材料室内拉伸试验方法:GB/T228-2002[S].北京:国家标准出版社,2002.
[19]PARK R.Ductility evaluation from laboratory and analytical testing[C]//Proceedings of the 9th World Conference on Earthquake Engineering,1988.
[20]中国建筑科学研究院.建筑抗震试验方法规程:JGJ 101-1996[S].1997.