(1 青岛理工大学土木工程学院，青岛 266033； 2 济宁市建筑设计研究院，济宁 272125； 3 中冶集团建筑研究总院，北京 100088)
［摘要］针对外伸端板与T型连接设计中考虑撬力影响的问题，利用ANSYS进行了三维非线性有限元分析，考虑了材料非线性、几何非线性、高强螺栓的预拉力、端板间接触压力的影响。证明了撬力的存在以及螺栓拉力的分布是以受压翼缘位置为转动中心的梯形分布，提出了外伸端板连接中螺栓拉力的计算模型。研究了高强螺栓受拉连接采用外伸端板或T型接头的破坏机理以及撬力作用计算理论。介绍了国内外关于外伸端板与T型连接设计中考虑撬力作用的端板厚度设计方法，为工程设计提供了参考依据。
［关键词］端板连接；高强螺栓；T型连接；撬力；杠杆作用
Design and finite element study on the prying force of high strength bolt in extended end-plate connections
Wang Yan1, Zheng Jie2，Hou Zhaoxin3(1 School of Civil Engineering, Qingdao Technological University, Qingdao 266033，China; 2 Jining Architectural Design & Research Institute, Jining 272125, China;3 Central Research Institute of Building and Construction,MCC Group, Beijing 100088，China)
Abstract:The influence of prying force is investigated in extended end-plate and T-shaped joints. The FEM software ANSYS is selected to carry on the 3D non-linear analysis, which includes the effects of the material nonlinearity, the geometric nonlinearity, the pretension of high strength bolt and the contact pressure between end-plates. It is proved that prying force exists and the tensile force’s distribution of high strength bolt is a trapezoid which is rolled by the center of compression flange. It is provided the calculation model of bolt’s tensile force in extended end-plate connections. It analyzes the collapse mechanism for the tensile connection of high strength bolt using extended end-plate or T-shaped joint. The difference of design method about joints with other countries is investigated in considering prying force calculation. It provides reasonable reference for design of steel structure.
Keywords:end-plate connection; high strength bolt; T-shaped connection; prying force; prying action
国家自然科学基金资助项目(50778092)；山东省自然科学基金资助项目(Y2006F10)。 
作者简介：王燕，教授，博导，Email:yanwang123@qtech.edu.cn。
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