大跨度钢管混凝土桁式拱桥结构非线性分析

Structure Nonlinear Analysis of Long Span CFST Truss Arch Bridges

采用了几何非线性和材料非线性等因素对大跨度钢管混凝土桁式拱桥进行结构非线性分析 ,结果表明对这种大跨 (跨径大于 30 0 m )、宽跨比小 (接近 1/ 2 0 )的钢管混凝土桁式拱桥 ,几何非线性和材料非线性的影响均较大 ,在设计和施工时不应忽略。

Considering the factors of geometrical nonlinearity and material nonlinearity, a long span CFST arch bridge is analyzed in this paper. The results show that the influence of nonlinearity is remarkable for long span(exceed 300m) and lesser ratio of width to span (about 1/20). Nonlinearity must be considered in calculating structural internal forces of long span CFST arch bridge.