I<正>NTRODUCTION Changbaishan Nature Reserve is one of the most important forest reserves in China and it is very rich in wood-rotting fungi (Dai, 1997, 2000, 2003; Dai et al., 2003). Nearly 100 species of the C...I<正>NTRODUCTION Changbaishan Nature Reserve is one of the most important forest reserves in China and it is very rich in wood-rotting fungi (Dai, 1997, 2000, 2003; Dai et al., 2003). Nearly 100 species of the Corticiaceae sensu展开更多
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...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.展开更多
基金Supported by the National Natural Science Foundation of China (No.30425042)
文摘I<正>NTRODUCTION Changbaishan Nature Reserve is one of the most important forest reserves in China and it is very rich in wood-rotting fungi (Dai, 1997, 2000, 2003; Dai et al., 2003). Nearly 100 species of the Corticiaceae sensu
文摘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.
