For connecting precast concrete members in prefabricated structures, steel fiber reinforced high‐strength concrete (HSFRC) shows greater bearing capacity and better durability than normal reinforced concrete. When these structures are continuously loaded, multiply micro and macro cracks will appear. The modeling of this process is challenging because the conventional finite element modeling commonly encounters numerical problems such as stress locking and overestimations of the damaging zones. On the other hand, the novel peridynamics‐based theory models the continuous and discontinuous processes in the same framework, showing robustness. In this work, based on the recently presented micropolar peridynamics with shear deformability, a numerical tool with implicit iteration scheme for quasi‐static loading condition is built. With the proposed numerical tool, the damage processes of prefabricated beam post‐cast with HSFRC are simulated. The interaction between precast, post‐cast concrete, and rebars are taken into consideration. For validations, the numerically obtained results are compared with the experimental results, indicating that this tool can provide agreeable crack patterns, initial cracking loads, and yield loads of the beams.

中文翻译：

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钢纤维增强高强混凝土预制梁预制梁的周向动力学模型

对于在预制结构中连接预制混凝土构件，钢纤维增强高强度混凝土（HSFRC）具有比普通增强混凝土更大的承载能力和更好的耐久性。当这些结构被连续加载时，会出现大量的微观和宏观裂纹。该过程的建模具有挑战性，因为常规的有限元建模通常会遇到数值问题，例如应力锁定和损坏区域的过高估计。另一方面，新颖的基于周动力学的理论在同一框架中对连续和不连续过程进行建模，从而显示出鲁棒性。在这项工作中，基于最近提出的具有剪切变形性的微极周动力学，建立了具有隐式迭代方案的准静态载荷条件数值工具。使用所提出的数值工具，模拟了用HSFRC对预制梁进行后浇铸的损伤过程。考虑了预制，后浇混凝土和钢筋之间的相互作用。为了进行验证，将数值获得的结果与实验结果进行比较，表明该工具可以提供令人满意的裂纹模式，初始裂纹载荷和梁的屈服载荷。