摘要
为选取预应力混凝土连续梁桥更优合龙方案,运用软件建立4种合龙方案的桥梁有限元模型,并针对不同合龙方案情形下的主梁应力、挠度、弯矩及线形变化规律进行对比分析。结果表明:4种合龙方案对连续梁桥的主梁受力影响不大;方案三可以有效改善主梁应力分布,但对主梁变形及成桥线形改善效果不大;而方案二和方案四对于主梁应力分布、主梁变形及成桥线形的改善效果均不大;综合来看,该桥选择方案一成桥,对于控制主梁应力、挠度以及线形效果更好,其结论可为该类型桥梁的合龙设计提供参考。
In order to select the better closure scheme of prestressed concrete continuous beam bridge, the bridge finite element models of four closure schemes are established by using software, and the changes of main beam stress, deflection, bending moment and line shape of different closure schemes are compared and analyzed.The results show that the four closure schemes have little effect on the stress of the main beam of the continuous beam bridge;scheme 3 can effectively improve the stress distribution of the main beam, but has little effect on the deformation of the main beam and the alignment of the completed bridge;However, scheme 2 and scheme 4 have little effect on the stress distribution of the main beam, the deformation of the main beam and the alignment of the completed bridge;from a comprehensive point of view, the selection of the first completion scheme of the bridge has a better effect on controlling the stress, deflection and linetype of the main beam.The conclusion can provide a reference for the closure design of this type of bridge.
作者
孟磊
MENG Lei(Huashe Design Group Co.,Ltd.,Jinan 250000,China)
出处
《粉煤灰综合利用》
CAS
2022年第1期122-125,139,共5页
Fly Ash Comprehensive Utilization
关键词
连续梁桥
合龙方案
应力
线形
continuous beam bridge
closure scheme
stress
line type
