特高压输电塔半刚性连接K形节点受力性能研究

发布时间：2018-05-05 03:16

本文选题：输电塔结构 + 半刚性　；参考：《建筑结构学报》2014年07期

【摘要】：基于螺栓受剪半刚性K形节点理论分析及有限元模型提出一种适用于此类节点的计算模型和计算方法。该方法能够较好地分析半刚性连接K形节点转动变形的组成,包括主角钢剪切变形、螺栓剪切变形、螺栓孔的变形。考虑主角钢受剪、螺栓受剪、孔壁变形对节点转动刚度的影响,从而得到节点弯矩-剪切转角(M-鐖s)和弯矩-转角(M-鐖)曲线。通过试验验证了该计算方法的适用性。提出的半刚性连接K形节点弯矩-转角建议计算方法量化了主角钢肢宽、肢厚、螺栓直径、节点板厚度对转动刚度的影响,但未考虑主角钢两肢边相互影响。建议计算方法也可为我国输电塔结构设计规范关于节点转动变形的具体设计提供参考。Kishi-Chen的三参数幂函数模型适用于对此类节点弯矩-转角计算,输电塔结构中此类节点的形状系数取值大致在1.5~2.2之间。
[Abstract]:Based on the theoretical analysis and finite element model of bolt shear semi-rigid K-shaped joints, a calculation model and a calculation method for this kind of joints are presented. This method can be used to analyze the components of rotational deformation of semi-rigid connection K-joints, including shearing deformation of main steel, shearing deformation of bolts and deformation of bolt holes. Considering the effect of main steel shear, bolt shear and hole wall deformation on the rotational stiffness of joints, the moment-shear rotation angle and moment-rotation curve of joints are obtained. The applicability of the method is verified by experiments. The proposed method for calculating the moment and rotation angle of K joints with semi-rigid connections quantifies the effects of the main steel limb width, limb thickness, bolt diameter and joint plate thickness on the rotational stiffness, but does not take into account the interaction between the two sides of the main body steel. The proposed calculation method can also provide a reference for the specific design of the nodal rotational deformation in the code for the structural design of transmission towers in China. Kishi-Chen 's three-parameter power function model is suitable for the calculation of the moment and rotation angles of this kind of joints. The shape coefficient of this kind of node in the transmission tower structure is approximately between 1.5 and 2.2.
【作者单位】：重庆大学山地城镇与新技术教育部重点实验室;中国建筑第七工程局有限公司;
【基金】：国家自然科学基金项目(51078367) 中央高校基本科研业务费项目(CDJZR13200037)
【分类号】：TU391

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