摘要
以某旧桥加固项目为背景,结合有限元分析软件,对大跨径宽幅连续箱梁常出现的腹板斜向裂缝、底板纵向裂缝及顶板纵向裂缝等病害原因进行了详细的计算分析及总结;对于多跨变截面连续梁采用了创新的体外预应力布置,即达到了改善主拉应力的效果,又提高了跨中下缘压应力储备及跨中承载能力,可为类似旧桥加固桥梁借鉴。
This paper,taking a project as a case study,analyzes the causes of the diagonal cracks,the longitudinal cracks of the slab and the roof in multi-span continuous bridge with the finite element analysis software.The external prestressing would improve the effect of the main tensile stress,the compressive stress reserve and the mid-span bearing capacity of the multi-span continuous bridge.The reinforcement practice method in this paper can be applied to similar old bridge reinforcement.
作者
王同
WANG Tong(Guangdong Province Communications Planning &Design Institute Co., Ltd., Guangzhou 510507, China)
出处
《广东交通职业技术学院学报》
2017年第3期28-32,共5页
Journal of Guangdong Communication Polytechnic
关键词
宽幅多跨
连续梁
加固
体外预应力
wide and multi-span
continuous bridge
reinforcement
external prestress
