3 . this thesis analyses and contrasts the coefficient of creep of concrete filled steel tubes , develops the calculation formulas of equivalent elastic modulus , adopts common structure analyses procedure ansys to calculate the redistribution of section stress in the concrete filled steel tubes arch bridge 同時根據(jù)鋼管混凝土組合結(jié)構(gòu)的受力特點,應(yīng)用“齡期調(diào)整的有效彈性摸量法”推導(dǎo)出核心混凝土考慮徐變影響后的徐變等效彈性模量計算公式,從而利用通用有限元ansys進行鋼管混凝土拱橋的應(yīng)力重分布計算。