摘要
早期设计的中、下承式吊杆拱桥缺乏横梁间的纵向联系,桥面体系整体性较差,行车舒适性欠佳,断索落梁事故时有发生。为解决无加劲纵梁吊杆拱桥结构冗余度不足的问题,采用了增设加劲纵梁构造设计,并在纵横梁的连接方式和传力系统上进行优化。经计算分析,新增加劲纵梁提高了悬吊式桥面的整体性,达到了“索断桥不垮”的安全设计目标,并成功运用于合阳嘉陵江大桥维修改造中。
In the early design,the suspension arch bridge of the middle and lower types were lacked the longitudinal connection between beams,the integrity of the bridge deck system was poor,the driving comfort was uncomfortable,and the accidents of cable breaking and beam falling occurred occasionally.In order to solve the problem of insufficient redundancy of unstiffened longitudinal suspension arch bridge,this paper adopts the structural design of added steel stringer,and optimizes the connection mode and force transmission system of vertical and horizontal girder.Through calculation and analysis,the new stiffened steel stringer enhances the integrity of the suspension bridge deck,and achieves the safety design goal of"the cable broken while the bridge will not collapse",and has been successfully applied in the maintenance and reconstruction of Heyang Jialing River Bridge.
作者
蒋超越
李章瑜
陈浩
JIANG Chaoyue;LI Zhangyu;CHEN Hao(Chongqing Wanqiao Communication-Tech Co.,Ltd.,Chongqing,400072)
出处
《公路交通技术》
2021年第3期105-110,共6页
Technology of Highway and Transport
关键词
吊杆拱桥
新增加劲纵梁
桥面体系加固
结构冗余度
suspension arch bridges
added stiffened stringer
reinforcement of bridge deck system
structural redundancy
