creep coefficient;  creep;  creep strain increment;  Shrinkage

Based on the existing experimental data, the creep analysis of high-rise and long-span civil buildings can only be carried out by referring to the creep coefficient method in bridge structure or the creep method in hydraulic structure. Starting from the definition of creep coefficient, the median integral theorem and superposition principle are used to derive and modify the expression of the increment of creep shrinkage strain at different times of loading age and starting age, compare the difference in efficiency and accuracy between the finite element method applying creep coefficient analysis of creep and the initial strain method applying creep analysis of creep, and suggest that the initial strain method of creep degree should be used from the perspective of conceptual design to estimate the impact of creep on high-rise and long-span civil buildings.