摘要
为准确掌握拱脚的应力分布,指导结构设计,通过大型空间有限元分析程序对某(88+88)m钢管混凝土系杆拱桥中墩处拱脚及与其相连接的系梁进行分析。分析结果表明,在最不利工况下,系梁靠近中支点实体混凝土的箱梁底板混凝土压应力较大;拱座顶部混凝土存在一定水平的顺桥向拉应力;在拱肋与拱脚的局部连接位置产生非常明显的应力集中现象;中墩处系梁实体混凝土内配置横向钢束后,该处混凝土横、竖桥向应力水平较低,仍以平面受力为主。
In order to master the stress distribution and offer guide to structure design, the spring joint near the middle of （88 ＋ 88）m CFST arch bridge is analyzed by using the finite element software. The results show in the worst situation that at the bottom plate of the box girder near the middle pier, the concrete bears larger pressure stress. It means that a certain level tensile stress exists in the concrete at the top of the spring joint and there is the stress concentration at the joint of the arc rib and the spring joint. The paper suggests that after arranging transverse prestressed steel strand, there is mainly longitudinal pressure stress in the beam concrete.
出处
《山东交通学院学报》
CAS
2010年第4期39-43,共5页
Journal of Shandong Jiaotong University
关键词
钢管混凝土
系杆拱桥
有限元
拱脚
应力分析
CFST
tie-bar arch bridge
the finite element
spring joint
stress analysis
