Numerical study on hysteretic characteristics of transmission tower K-joints

Introduction: The mechanical properties of joints have a significant impact on the dynamic response transmission tower structures. Methods: Considering bolt slip, numerical model K-joint is established. K-joints are studied from three aspects: failure mode, load-displacement hysteretic curve, and stiffness degradation by method. effects preload, friction coefficient, member strength analyzed. Results: results show that due to complexity K-joints, slip will lead reduction ultimate bearing capacity change position. In order accurately obtain influence should be considered in research process; plumpness curve greatly affected parameters; degenerates with increase loading times. Discussion: provide reference for analysis tower.