摘要
全面考虑结构的材料非线性和几何非线性,通过对广东金马大桥进行全过程非线性分析,得到了结构的极限承载力.研究了混凝土收缩徐变、加劲梁配筋率、斜拉索的安全系数、加载方式等因素对协作体系桥梁的极限承载力的影响.结果表明:斜拉索的设计安全系数是很重要的影响因素,应加以重视;全桥和半桥加载时,弹塑性极限活荷载安全系数分别为21.4和9.67,表明这种协作体系具有良好的极限承载能力.
In this paper, based on nonlinear full-range analysis with both geometrical and material nonlinearity, ultimate load-carrying capacity of Jinma Bridge is calculated. The studies on effects of the concrete shrinkage and creep, the ratio of reinforcement of stiffening girder, the safty coefficients of cable and restraint of bearing on ultimate load-carrying capacity of the structure indicate that the elastic ul timate load-carrying capacity is much greater than elastic-plastic one, attention should be paid to selection of the safety coefficient of the cable. Furthermore it is found that for the condition of loading on the entire bridge and half bridge, the safety coefficients of ultimate bearing capacity of jinma bridges are respectively 21.40 and 9. 67. This indicated that the ultimate bearing capacity of Jinrna Bridge is very fine
出处
《武汉理工大学学报（交通科学与工程版）》
2008年第6期1033-1036,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家西部建设基金项目(批准号:200631882350)
中国博士后基金项目(批准号:20070411071)
大连市优秀青年科技人才基金项目(批准号:2008J23JH047)资助
关键词
金马大桥
协作体系
极限承载力
几何非线性
材料非线性
Jinma Bridge
cooperated system
ultimate load-carrying capacity
geometrical nonlinearity
material nonlinearity
