自收缩是影响混凝土抗裂性能的一个重要参数,采用三维混凝土温控防裂有限元程序,分析了不同收缩终值、收缩速率对某工程地下室长墙早期应力的影响。结果表明,墙体早期应力对自收缩终值和自收缩发展速率的影响均十分敏感,较大自收缩终值在墙体后期易产生较大拉应力,而较大自收缩发展速率早期易产生较大应力,且拉应力龄期提前,在实际工程中应采取相应措施以减小自收缩、控制其发展速率,从而减小墙体出现裂缝的可能性。 The self-shrinkage is an important parameter that affects the crack resistance of concrete. The temperature-controlled crack-proof finite element program of three-dimensional concrete is used to analyze the effect of different shrinkage final values ​​and shrinkage rates on the early stress of a long wall of a project basement. The results show that the early stress of wall is very sensitive to the final value of self-shrinkage and the rate of self-shrinkage. The larger value of self-shrinkage tends to produce larger tensile stress in the late stage of wall, Larger stress, and the age of the tensile stress ahead of time, in the actual project should take appropriate measures to reduce the self-shrinkage, control the rate of its development, thereby reducing the possibility of cracks in the wall.