摘要
In this paper,a general finite-element software is used to calculate the creep and shrinkage of concrete in CFST arch bridge. The bridge’s spatial model is founded. The cross-section stress redistribution of the arch ribs is researched. The analysis results show that the creep and shrinkage has a great influence upon the structure forces and the stress of any controlled cross-section. The cross-stress redistribution is very obvious. The creep and shrinkage of concrete has little influence upon the structure axial force,but has a great influence upon the bending moment,The forces and the stress of the steel tube have been increased but those of the concrete have been reduced because of the creep and shrinkage. The bending moment of the top of the arch has increased obviously. Engineers should be careful about this phenomenon.
In this paper,a general finite-element software is used to calculate the creep and shrinkage of concrete in CFST arch bridge. The bridge's spatial model is founded. The cross-section stress redistribution of the arch ribs is researched. The analysis results show that the creep and shrinkage has a great influence upon the structure forces and the stress of any controlled cross-section. The cross-stress redistribution is very obvious. The creep and shrinkage of concrete has little influence upon the structure axial force,but has a great influence upon the bending moment,The forces and the stress of the steel tube have been increased but those of the concrete have been reduced because of the creep and shrinkage. The bending moment of the top of the arch has increased obviously. Engineers should be careful about this phenomenon.
出处
《桂林电子工业学院学报》
2004年第5期55-58,共4页
Journal of Guilin Institute of Electronic Technology
基金
湖北省自然科学基金项目 (2 0 0 3 ABA0 16)
关键词
钢管混凝土拱桥
收缩徐变
应力重分布
concrete filled steel tubular arch bridge, shrinkage and creep, stress redistribution
