悬索桥锚跨张力控制方法研究  

Study on anchor span cable forces adjustment method of suspension bridge

作　　者：胡志坚[1] 黄健伟 HU Zhijian;HUANG Jianwei(School of Transportation,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学交通学院,湖北武汉430063

出　　处：《中山大学学报（自然科学版）（中英文）》2021年第4期129-135,共7页Acta Scientiarum Naturalium Universitatis Sunyatseni

摘　　要：传统的索力调整方法未能有效考虑散索鞍偏角与锚跨张力之间的耦合关系,具有一定盲目性和危险性。为安全快速地对悬索桥锚跨张力和散索鞍偏角进行调整,基于散索鞍转动刚度,研究了温度变化及边跨垂度偏差对散索鞍偏转角的影响。在此基础上,结合某三塔悬索桥工程实践,提出了一种考虑散索鞍转动效应的索力调整简化方法。实践结果表明:温度变化是造成散索鞍偏转的主要原因;推导出的温度变化及边跨垂度偏差与散索鞍偏角的关系式,在工程实践中验证了其正确性及计算精度;提出的锚跨张力调整简化方法,能显著减少调整次数,调索精度较高,且有效避免索股发生滑移,具有操作简单、节省工期以及安全性较高等优点。The traditional cable forces adjustment method fails to consider the coupling relationship between the saddle angle and the anchor span cable forces effectively,which can be dangerous to some extent. In order to adjust the anchor span cable forces and the saddle angle of the suspension bridge in security and high speed,based on the rotation stiffness of saddle,the effects of temperature and sag deviation of side span on the saddle angle are studied. Combined with the practice of a three-tower suspension bridge,a simplified method of cable forces adjustment considering the rotation effect of the saddle is proposed. The results of practice show that:temperature change is the main reason for the deflection of the saddle. The relationship among the variation of temperature and the deviation of side span sag and the angle of splay saddle deflection is derived. Its correctness and calculation accuracy have been verified in the practice. The simplified method of cable forces adjustment can significantly reduce the adjustment times,thus a high cable adjustment accuracy is achieved,and can effectively prevent the cable strand from slipping,which has the advantages of simple operation,time saving and high safety.

关 键 词：散索鞍转动刚度 温度 边跨垂度偏差 索力调整 散索鞍偏角 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]