约束变形引起的现浇混凝土结构早期开裂是工程中存在的普遍现象,这种混凝土未成熟期裂缝影响结构的正常使用、耐久性甚至安全性。从材料、结构和施工环境三方面的影响因素出发,对混凝土早期变形裂缝进行综合分析,着重利用裂缝计算的粘结滑移理论,建立轴向配筋构件在约束变形下的开裂机制模型和裂缝参数计算,并对荷载作用和变形作用下裂缝发展以及力学性能的主要特点及差异进行分析比较。 The early cracking of cast-in-place concrete structures caused by constraint deformation is a common phenomenon in engineering. Such immature cracks affect the normal use, durability and even safety of structures. Based on the influencing factors of material, structure and construction environment, the early deformation cracks of concrete are comprehensively analyzed, and the theory of bond slippage in fracture calculation is used to establish the cracking mechanism model and the crack of axial reinforcement component under constraint deformation Parameters are calculated and the main characteristics and differences of crack development and mechanical properties under load and deformation are analyzed and compared.