摘要
以虎跳门特大桥作为工程背景 ,采用梁段单元法建立了大跨度连续刚构桥预应力混凝土箱形梁极限承载力分析的数学模型 ,并推导出薄壁箱梁的 U.L.列式增量平衡方程。在研究中 ,考虑了箱梁顶板、底板和腹板局部变形的影响及材料非线性和几何非线性。按形成矩阵的“对号入座”
Based on the Hutiaomen extra long span frame bridge engineering, a mathematical model of the ultimate load capacity for Long span Continuous Rigid frame bridge prestressed concrete box beam is set up by means of beam segment finite element method, the U.L.formulation of thin walled box girder virtual work equilibrium equation is deduced. In the analysis, the influences of local deformation of every plate of thin walled box girder and of geometrical and material nonlinearity is considered. According to the rule “Set in Right Seat”, the property matrix of the nonlinear elment of thin walled box girder is deduced as well.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2000年第1期38-43,共6页
China Journal of Highway and Transport
关键词
连续刚构桥
极限承载力
大跨度
预应力
混凝土
continuous rigid frame bridge
local deformation
geometrical nonlinearity
material nonlinearity
ultimate load capacity
