基于数值计算的吊杆参数对索力的规律研究

Study on Hanger Rod Parameter Influence Law of Cable Tension Based on Finite Element methods

介绍几种目前测试系杆拱桥吊杆索力的方法,阐述了频率法用于测试系杆拱桥吊杆索力的基本原理,并对频率法中涉及的吊杆参数进行了综述。采用大型有限元软件ANSYS计算在不同吊杆参数下,吊杆索力的变化和规律。结果表明,吊杆参数对吊杆索力的影响程度大小排序,依次为吊杆长度、截面抗弯刚度取值、钢套管长度。吊杆长度、截面抗弯刚度取值、钢套管长度分别与吊杆的索力成反比、正比、正比的函数关系。最后用两钢管混凝土拱桥案例验证了基于吊杆参数对索力影响规律的大小来倒推施工过程中吊杆参数方法的可行性。

Several calculation methods for hanger rod cable tension of tied arch bridge are introduced. The basic principles of frequency method for testing tied arch bridge suspender force are described, and the key parameters of frequency method involved are reviewed. There are different laws of tied arch bridge suspender force with frequency under different basic parameters based on finite element method. The results show that the length of hanger rod affects cable tension most, followed by, flexural rigidity, the length of outer steel tube. Finally, the feasibility of the method to get rod arameters in the two bridge process is verified based on the influence of the rod arameters on the cable force.