Previous research of segmental joints are mainly based on experimental and theoretical methods; few studies have focused on refined numerical model. Therefore, a refined numerical model is established in which eight‐node solid element and three‐dimensional beam element are adopted to simulate joint structures and reinforcement, respectively, and bolt preload is considered. Then, the numerical model is verified with full‐scale tests and applied to analyze the influence of joint deformation and bolt preload. It is confirmed that (a) the numerical model can reproduce joint deformation process with good accuracy; (b) bolt stress are controlled by tensile action caused by joint opening and bending action caused by joint vertical displacement; (c) the changes of joint deformation with bending moment can be divided into three stages; bolt preload has no effect on the change of joint deformation with bending moment but has significant impact on the value of joint deformation in each stage.

中文翻译：

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分段节的精细三维数值模型及其应用

以往对节段节的研究主要基于实验和理论方法。很少有研究集中在精炼的数值模型上。因此，建立了精炼的数值模型，采用八节点实体单元和三维梁单元分别模拟节点结构和钢筋，并考虑了螺栓的预紧力。然后，通过全尺寸试验验证了该数值模型，并将其用于分析接头变形和螺栓预紧力的影响。可以肯定的是：（a）数值模型可以很好地再现接头变形过程；（b）螺栓应力受接头打开引起的拉伸作用和接头垂直位移引起的弯曲作用的控制；（c）接头变形随弯矩的变化可分为三个阶段；