基于严寒地区混凝土高拱坝工程提出了一种预制保温一体化网格状模板结构，该结构不仅与现浇拱坝协同受力还具备全生命周期的保温功能。通过试验和数值模拟相结合的方法，研究模板在平面外荷载作用下的裂缝分布、承载力和变形等性能。试验结果表明：在平面外荷载作用下，模板结构的裂缝主要分布在底部梁跨中、梁柱交界面以及网格板中心位置，加载板中心的竖向变形显著大于梁跨中变形。当荷载达到600 kN时，变形-荷载曲线斜率变缓；当荷载达到1 100 kN时，梁端钢筋出现屈服现象。在100 m水深压力下，试件平面外变形小于屈服变形，梁、板受拉侧出现裂缝，受压侧无明显损伤。本研究成果为预制保温一体化模板在严寒地区高拱坝结构的应用奠定了基础。

A prefabricated thermal insulation integrated grid template structure was proposed for a concrete high arch dam project in severe cold region. The structure not only cooperates with the cast-in-place arch dam, but also provides thermal insulation throughout its entire lifespan. The crack distribution, bearing capacity, and deformation of the formwork under out-of-plane load were studied using the combination of experimental and numerical simulation methods. The test results show that the cracks of the formwork, which is subjected by the action of out-of-plane load structure are mainly distributed at the center of the bottom beam span, the beam-column interface and the center of the grid plate under. Vertical deformation at the center of the loading plate is significantly greater than that at the beam span. When the load reaches 600 kN, the slope of the deformation-load curve decreases. When the load reaches 1 100 kN, the steel bar at the beam end yields. Under the pressure equivalent to 100 m of water depth, the out-of-plane deformation of the specimen is less than the yield deformation. Cracks appear on the tensile side of the beam and plate, but no significant damage occurs on the compressive side. The research results provide a foundation for the application of prefabricated thermal insulation integrated formwork in high arch dam structure in severe cold area.