摘要
建立了分析在斜拉桥中采用辅助索制振效果的有限元程序 ,以某大跨度斜拉桥模型为例 ,对辅助索的水平及弧形两种布置方案 ,考察了辅助索的阻尼、张力等因素对面外、面内制振效果的影响。分析表明 ,面外振动不易得到控制 ;对面内振动 ,增加辅助索的阻尼可提高制振效果 ,而辅助索的内力对制振效果影响不大 ;采用辅助索后 ,主索的张力变化不大。对比表明 ,弧形布置方案优于水平布置方案。本文的结论与现有的观测及实验结果相一致。利用所建立的程序 。
The program analyzing the effect of cable cross ties is developed by FEM in this paper.Taking the model of one full scale large span cable stayed bridge as an example,level and arch allocations of cross ties are investigated respectively.Some factors influencing the effect of vibration control of in plane and out of plane,such as the damping and the tension of cable cross ties are studied.It is concluded that the out of plane cable vibrations almost can not be suppressed,the in plane vibrations can be controlled effectively by using more dissipative ties.However,the tension of cross ties has little influence on the results.Meanwhile,the tension in stayed cables changed little after using cross ties.It indicates that the arc shaped allocation is more effective than the level one.The results are consistent with the reported observations and other studies.The program developed in this paper can be used in engineering,to choose the cable ties and their allocation.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2000年第4期66-69,共4页
China Journal of Highway and Transport
基金
铁道部项目基金资助(96G35-B)
关键词
斜拉桥
斜拉索
振动控制
辅助索
有限元法
cable stayed bridge
stay cable
vibration control
cable cross tie
FEM