钢管混凝土格构式风电机塔架节点静力性能试验研究*
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李斌1，乔明1，高春彦1,2（1 内蒙古科技大学建筑与土木工程学院， 包头 014010；2 南京航空航天大学航空宇航学院， 南京 210016)［摘要］对6个钢管混凝土格构式风电机塔架焊接相贯节点和焊接管板节点进行了缩尺模型试验，研究了这两种塔架节点的破坏机理和破坏特征、节点进入塑性后的变形发展过程以及节点交汇区域的复杂应力状态和分布规律。试验结果表明：塔柱钢管内混凝土的存在，使钢管混凝土节点的破坏模式和力学性能与空钢管节点大大不同，钢管混凝土相贯节点的破坏形态为受压腹杆局部屈曲破坏，管板节点的破坏形态为节点板受压屈曲和受拉撕裂破坏，没有出现节点区塔柱管壁在受拉、受压腹杆接头处的塑性变形失效。由试验结果还得到：两种节点交汇处塔柱管壁以及节点板的应力分布极不均匀，个别测点已经进入塑性而有的测点仍然处于弹性阶段。由破坏形态和节点区的应力分布情况得到了一些设计建议，为实际工程塔架节点的设计提供参考。［关键词］钢管混凝土； 格构式塔架； 相贯节点； 管板节点； 静力性能中图分类号：TU398 文献标识码：A 文章编号：1002-848X(2013)05-0035-04Static behavior study on latticed concrete-filled steel tubular wind turbine tower jointsLi Bin1, Qiao Ming1, Gao Chunyan1,2(1 Architecture and Civil Engineering Institute, Inner Mongolia University of Science and Technology, Baotou 014010, China; 2 College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)Abstract: Six latticed concrete-filled steel tubular (CFST) wind turbine tower K-shape joints were carried on the static load test, which included the weld intersecting joint and the gusset plate joint. The failure mechanism and characteristics on the two kinds of K-shape joints, the deformation development process after joints entered plastic stage and the stress state and distribution of joint intersection area were studied. The results show that the failure mode and mechanical behavior of CFST K-shape joints are greatly different from that of the hollow steel tubular K-shape joints because of the existence of core concrete, the failure mode of the weld intersecting joints show the local buckling of compression web member and that of the gusset plate joints present as the compression buckling and tension tearing of the gusset plates, while the plastic deformation failure of tower column tube wall in joint area is not appear. It is also shown by test results that the stress distribution of tower column tube wall and gusset plate in joint intersection is extremely non-uniform, individual parts already enter plastic state but some other parts are still in elastic state. According to the failure mode and stress distribution conditions of the two kinds of K-shape joints, some design suggestions are drawn, which can provide reference for the latticed CFST wind turbine tower joints.Keywords: concrete-filled steel tube; latticed tower; weld intersecting joint; gusset plate joint; static behavior*国家自然科学基金项目（51068021），包头市科技攻关项目（2010Z1002，2011Z1006），内蒙古自然科学基金项目（2012MS0711）。作者简介：李斌，博士，教授，Email:btlibin@189.cn。参考文献［1］芮晓明, 柳亦兵, 马志勇. 风力发电机组设计［M］. 北京: 机械工业出版社, 2010.［2］鲍侃袁, 沈国辉, 孙炳楠，等. 高耸钢管塔K型结点极限承载力的试验研究和理论分析［J］. 工程力学, 2008,25（12）:114-121.［3］宋谦益. 圆钢管混凝土钢管K形节点的力学性能研究［D］. 北京：清华大学, 2009.［4］舒兴平. 高等钢结构分析与设计［M］. 北京:科学出版社,2006.［5］JEFFREY A PACKER. Concretefilled HSS connections ［J］. Journal of Structural Engineering, 1995,121（3）:458-467.［6］GB 50017—2003 钢结构设计规范［S］. 北京: 中国计划出版社, 2003.［7］乔明. 钢管混凝土格构式风电塔架节点受力性能研究［D］.包头：内蒙古科技大学,2012.
