摘要
鉴于索塔锚固结构中焊钉受力状态的特殊性,对混凝土竖向承压、水平力及两者共同作用下焊钉连接件的受力特性进行研究。通过对单钉推出试验进行有限元分析,验证了有限元模拟方法的正确性。采用有限元方法,研究了在混凝土竖向承压、水平力及两者共同作用下,焊钉连接件抗剪承载力、剪切刚度以及焊钉变形、应力的变化规律。研究表明,混凝土竖向承压对焊钉连接件抗剪承载力和剪切刚度均产生影响;在幅值变化相同的情况下,水平拉力的变化对焊钉极限承载力的影响显著,而水平压力的变化则对焊钉剪切刚度的作用明显;两种受力状态下焊钉变形和应力分布规律相近;混凝土竖向承压和水平力共同作用下,钢板与混凝土接触状态不同,焊钉连接件抗剪承载力和剪切刚度的变化规律则不同。
Because of the special stress conditions of studs in cable-pylon composite anchor structure, it is necessary to study the mechanical features of studs under the vertical pressure of concrete pylon and the horizontal force and their interactions. The stud push-out test is analyzed by finite element method （FEM） and the simulation is validated by the experimental results. Based on FEM, this paper studies the shear capacity, shear stiffness, deformation and stress distribution of studs under loading conditions which are the vertical pressure of concrete pylon and horizontal force and their interactions. The results show that the vertical pressure affects the shear capacity and shear stiffness of studs. In the case with the same amplitude variation, changes of the horizontal tension affects the shear capacity of stud significantly, while changes of horizontal pressure affects the shear stiffness of studs significantly. Under the two loading conditions, the deformation and stress distribution of studs performs in the similar way. Under the interaction of the vertical pressure and horizontal force, the variation patterns of shear capacity and shear stiffness of studs are different, while the contact conditions of steel and concrete are different.
出处
《科技导报》
CAS
CSCD
北大核心
2014年第10期74-79,共6页
Science & Technology Review
基金
国家自然科学基金项目(51378069)
关键词
桥梁工程
组合结构桥梁
索塔锚固结构
焊钉连接件
受力特性
bridge engineering
steel-concrete composite structure bridge
cable-pylon composite anchor structure
stud connector
mechanical features
