混凝土弧形梁在支模时往往成型精度难以保证，且制作较难造价高，而3D打印技术有着施工速度快、设计自由度高等特点，因此为解决混凝土弧形梁支模复杂等问题，对3D打印弧形模壳-现浇梁建造的有效性展开研究。根据已有3D打印混凝土配合比和工艺参数，设计和打印了3根3D打印弧形梁模壳，并测量了打印成型精度；模壳内部配置钢筋笼并现浇混凝土材料，制作出3D打印混凝土弧形模壳-现浇梁；对梁试件进行竖向加载测试，验证该建造方式的有效性。结果表明：3D打印弧形模壳实体与三维模型尺寸基本一致，中部误差最大为4%，且整体打印质量和成型质量较好；竖向加载下，3根3D打印弧形模壳-现浇梁试件破坏形态相似；弧形模壳和现浇梁之间设有加固筋的梁试件的开裂荷载和极限承载力得到显著提高，其中极限荷载提升幅度约25%。

Concrete arc beams in the support mold is often difficult to ensure the molding accuracy, the production is more difficult to high cost, and 3D printing technology has a construction speed, design freedom and high characteristics, so in order to solve the problems such as the complexity of concrete arc beam support, the effectiveness of 3D printing arc shell-cast-in-place beam construction was studied. According to the existing 3D printing concrete ratio and process parameters, three 3D printing curved beam mold shells were designed and printed, and the printing and molding accuracy was measured. The mold shells were equipped with reinforcing cages and cast-in-place concrete materials, and 3D printing concrete curved mold shells-cast-in-place beams were produced. The beam specimens were subjected to vertical loading tests to validate the effectiveness of the construction method. The results show that the 3D printed curved mold shell is basically the same size as the 3D model, with a maximum error of 4% in the middle, and the overall printing and molding quality is good. Under vertical loading, the damage patterns of the three 3D printed curved mold shell-cast-in-place beam specimens are similar. The cracking load and ultimate capacity of the beam specimen with reinforcement between the curved mold shell and the cast-in-place beam have been significantly improved, with an increase in the ultimate load of about 25%.