一种混凝土桥梁徐变的有效计算方法

Accurate method of calculating creep deformation and internal force for concrete bridge

为了研究由徐变、收缩引起的变形对桥梁结构的影响,以力的增量形式推导出计算各施工阶段徐变次内力、徐变变形的递推公式,同时将本文的递推公式和传统的位移增量递推公式分别编制计算程序,利用有限元原理就奉化江大桥的施工结束阶段时徐变次内力和徐变变形进行模拟计算,并对两种计算结果进行了比较,提出一种有效计算混凝土桥梁徐变效应的方法.

Increment method is the most effective method to calculate creep deformation and internal force in indetemlinate structure on every constructed stage. The formula is deduced in another way which is in force increment style not in displacement. The process of deducing is more concise and more understandable.