关键词: 钢管混凝土, 收缩, 徐变, 内力重分布, 实用简化计算

Abstract: Nowadays the concrete-filled steel tube construction is gradually used in civil engineering. The computation theory of the concrete-filled steel tube is being researched by engineers and other scholars. This construction is the composite material construction. The shrinkage of the core concrete can produce the cross-sectional internal force redistribution. When the core concrete shrinks its creep will take place. The computation of the shrinkage internal force must include the creep of core concrete. This paper puts forward a computation method of the cross-sectional internal force of the concrete-filled steel tube construction that is produced by the core concrete shrinkage. This method meantime considers the concrete creep. The method is considerably simple and easy. The results of computation show that the redistributed internal force is considerably large. This method can be used in the cross-sectional internal force redistribution computation of concrete-filled steel tube arch bridges that is produced by the concrete shrinkage.

Key words: concrete-filled steel tube, shrinkage, creep, internal force redistribution, useful simplified computation