摘要
以大跨度斜拉桥主塔索塔锚固区为研究对象,采用Midas FEA NX软件建立索塔锚固区实体有限元模型,并对索塔锚固区空间应力进行分析。结果表明:1)主塔在挂索前后、运营阶段及断索工况下,塔壁横桥向、纵桥向应力均为压应力,预应力配束较为安全合理;2)长索锚固齿块的正上方区域锚后牵拉效应较为突出,设计过程中应加强该区域的配筋,限制其开裂。
This paper takes the anchorage zone of the main tower of the long-span cable-stayed bridge as the research object.Finite element model of anchorage zone of the tower was established by Midas FEA NX.The spatial stress of the anchorage zone of the tower was analyzed.The results showed:1) the transverse and longitudinal stress of the tower wall is compressive stress before and after the hanging cable,during the operation stage and under the condition of cable fracture.The prestressing tendon arrangement is safe and reasonable;2) the post-anchorage traction effect of the area directly above the anchorage tooth block of the long cable is more prominent.In the design process,the reinforcement in this area should be strengthened to limit its cracking.
作者
燕海蛟
刘龙
杨岑
颜俊
YAN Haijiao;LIU Long;YANG Cen;YAN Jun(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067;Shanghai Urban Construction Design&Research Institute(Group)Co.,Ltd.,Shanghai 200125;Chongqing Jiaotong University Engineering Design Research Institute Co.,Ltd.,Chongqing 400074)
出处
《公路交通技术》
2024年第5期73-85,共13页
Technology of Highway and Transport
关键词
大跨度斜拉桥
索塔锚固区
空间应力
long-span cable-stayed bridge
anchorage zone of tower
spatial stress
作者简介
燕海蛟(1984-),男,湖北省十堰市人,硕士,高工,研究方向为桥梁设计。E-mail:877632088@qq.com。
