斜拉桥柔性拉索无应力索长的精确计算  

Precise Calculation of Unstressed Flexible Cable Length in Cable-stayed Bridge

作　　者：宋郁民[1] 吴定俊[1] 薛炳勇[2] 

机构地区：[1]同济大学桥梁工程系,上海200092 [2]河北工程技术高等专科学校土木工程系,河北沧州061001

出　　处：《施工技术》2011年第2期42-43,47,共3页Construction Technology

摘　　要：斜拉桥柔性拉索无应力索长(即下料长度)计算在斜拉桥的设计与施工中是保证斜拉桥结构受力合理的关键参数。既有文献中广泛采用相似算法,可很好的满足工程需要。运用微积分,重新推导了无应力索长的计算公式,建立了新的算法。新方法建立在解析求解的基础上,具有更精确、更简洁的特点。通过算例,验证了新算法的正确性。The unstressed flexible cable length（cutting length） is a key parameter in cable-stayed bridge design and construction.Similar algorithm is used to calculate unstressed flexible cable length in cable-stayed bridge in the relevant literature,and is widely applied to practice with good accuracy.Based on analytical solutions,one new computational formula is derived which is more accurate and concise.Finally,the correctness and effectiveness are verified by an example.

关 键 词：斜拉桥 柔性拉索 无应力索长 微积分 解析解 精确计算 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]