初应力对哑铃型钢管混凝土拱承载力的影响  

The Influence on Bearing Capacity of Dumbbell-shaped CFST Arch Bridge Considering Initial Stress

作　　者：王新忠[1,2] 周水兴[3] 

机构地区：[1]湖南城市学院,湖南益阳413000 [2]长沙理工大学,湖南长沙410076 [3]重庆交通大学,重庆400074

出　　处：《中国市政工程》2010年第3期27-29,共3页China Municipal Engineering

摘　　要：根据钢管混凝土拱桥特点,采用包含初应力的实体—空间梁单元法来计算哑铃型钢管混凝土拱桥承载力的方法,计算3种哑铃型拱肋,分析了不同初应力系数、不同含钢率和不同跨径的因素对哑铃型钢管混凝土拱桥承载力影响规律,结果表明,初应力导致拱肋的极限承载力下降。According to the characteristics of CFST arch bridge,a solid-spatial beam element solution of dumbbell-shaped CFST arch bearing capacity is introduced.The calculation method which contains the initial stress is used for three types of dumbbell-shaped arch ribs with the analysis of the effects of different initial stress,steel ratio and span on the bearing capacity of dumbbell-shaped CSFT arch bridge.Then,the results show that initial stress will result in the decrease of ultimate bearing capacity of arch rib.

关 键 词：钢管混凝土拱桥 哑铃型 钢管初应力 初应力系数 承载力影响系数 

分 类 号：U448.220.12[建筑科学—桥梁与隧道工程]