摘要
运用通用分析软件Ansys,采用三维弹簧单元模拟焊钉连接件的作用,考虑两端固定、两端滑动及一端固定一端滑动3种钢锚梁端部支承形式,对钢牛腿支承锚梁型索塔锚固区端壁板连接件在锚固区自重、斜拉索力、混凝土收缩、塔壁日照温差和内外温差等作用下的传力机理进行分析。研究表明:钢牛腿支承锚梁型索塔锚固区端壁板连接件的受力分布极不均匀,其中作用于牛腿顶面附近连接件的拉拔力最大,约为30kN;钢锚梁端部支承形式对连接件剪力分布的影响不超过7%,对拉拔力分布的影响约为10%;斜拉索力、混凝土收缩对连接件拉拔力和剪力分布的影响约占总作用力的80%。
Based on general analysis software Ansys, the load transfer mechanism of the connectors on the end boards of a cable-tower anchorage with steel bracket supported anchor beam was analyzed. The effect of the stud connector was simulated by using 3-dimensional spring elements. The end constraints of steel anchor beams were changed among fixed-fixed, slidable-slidable and fixed-slidable. The applied loads in- cluded the dead weight of anchorage zone, cable force, concrete shrinkage and the temperature differences caused by sunlight or between inner and outer tower walls. The results show that the load effects distribute unevenly among connectors on the end boards of cable-tower composite anchorage with steel bracket supported anchor beams. The connectors near the top of steel brackets bear the maximum uplift force of about 30 kN. The end constraints of steel anchor beams affect the distribution of connector＇s shear force by less than 7% and that of connector＇s uplift force by about 10%. The contributions of cable force and concrete shrinkage account for about 80% of the total uplift force and shear force of connectors.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2014年第5期19-23,共5页
China Railway Science
基金
交通运输部重大科技专题项目(2011318494160)
关键词
斜拉桥
组合桥
索塔锚固区
钢锚梁
钢牛腿
连接件
传力机理
Cable stayed bridge
Composite bridge
Cable-tower anchorage zone
Steel anchor beam
Steel bracket
Connector
Load transfer mechanism
