混凝土管片接头接触特性的有限元模拟研究

Numerical simulation for contacting properties of concrete segmental joints with bolt

为了模拟混凝土管片接头的接触受力特性,建立了含有连接螺栓和接触面的有限元模拟计算模型。管片混凝土材料和连接螺栓材料的本构模型为双线性弹塑性本构关系。研究了C80混凝土管片接头在偏心受压荷载作用下,管片接头接触面接触压力和开度分布特性。研究表明,当轴力为2 000 kN固定不变时,随着弯矩的增加,混凝土管片接头受压区高度逐渐减少,接头的开度逐渐增加。当弯矩达到1 000 kNm时,连接螺栓达到屈服状态。有限元模拟结果表明,该混凝土管片接头的极限弯矩为1 500 kNm。在极限状态下,管片接头的最大开度为53. 8 mm。

In order to simulate contacting properties of concrete segmental joints,the simulation model is performed in finite ele-ment method.The bilinear constitutive models are used to characterize deformation properties of concrete material and deformedbar.The contacting pressure and opening depth on concrete segmental joints are numerically simulated.The investigation resultsshow that the linking bolt reaches yielding state when bending moment is 1 000 kNm and axial force is 2 000 kN.The ultimate ben-ding moment of the concrete segmental joint is 1 500 kNm.The maximum opening depth on concrete segmental joints is 53.8 mm.