摘要
近几年,波形钢腹板箱梁桥作为国内一种新型组合结构桥梁形式,工程实践逐渐向大跨度方向发展。随着跨径不断增大,横隔板等构造措施对主梁振动特性的影响变得不可忽视。采用大型通用有限元软件ANSYS建立了一座大跨度波形钢腹板箱梁桥的三维有限元模型,研究了横隔板布置位置对主梁竖弯、横弯和扭转振动模式基频的影响。研究结果表明,合理的横隔板布置方案可以有效改善大跨度连续波形钢腹板组合箱梁桥的动力特性,最优的横隔板布置位置是梁端和中支座偏中跨跨中12 m处。
In recent year, the box-girder bridge with corrugated steel webs as a new type of composite structural bridge in China is gradually developed to the long-span direction in engineering practices. With the continuous increment of span, the effect of the diaphragm setting to the vibrating characteristics of the girder can't be ignored. The large common finite element software ANSYS is used to establish the 3-D finite element model for a long-span box girder bridge with corrugated steel webs. The article studies the effect of the diaphragm location on the vertical girder bending, lateral bending and torsional vibration mode frequency.The study result shows that the reasonable diaphragm setting schemes can effectively improve the dynamic characteristics of the long-span continuous composite box-girder bridge with corrugated steel webs. The best diaphragm location is at 12 m between the girder end and the support partial in middle span.
出处
《城市道桥与防洪》
2014年第7期135-136,152,共3页
Urban Roads Bridges & Flood Control
基金
深圳市科技研发资金项目(JCYJ20120831163432230)
关键词
波形钢腹板组合箱梁桥
三维有限元模型
动力特性
横隔板
composite box-girder bridge with corrugated steel webs,D-dimensional finite element model,dynamic characteristics,diaphragm
