摘要
大跨径预应力混凝土连续梁桥在运营几年后普遍出现跨中下挠、腹板斜裂缝、底板裂缝等病害,导致桥梁的结构刚度下降,直接影响结构的使用性能和桥梁的耐久性。以某大跨径变截面预应力混凝土连续箱梁桥为背景,建立有限元模型,通过对比计算,对上述问题进行分析,得出相应的设计要点。
After several years＇operation of large span prestressed concrete continuous beam bridge, it appears span deflection, inclined cracks, floor cracks and other diseases, which lead to structural rigidity of the bridge and directly affect the performance of structure＇s durability and durability of the bridge. On the background of certain large span prestressed concrete continuous box girder bridge with variable cross - section, building finite element model and through comparison and calculation, we analyze the above- mentioned issues and obtain corresponding design points.
出处
《北方交通》
2014年第3期51-54,共4页
Northern Communications
关键词
变截面连续梁
预应力钢束布置
裂缝
耐久性
Variable cross- section continuous beam
Prestressed steel beam arrangement
Crack
Durability
