大跨度系杆拱桥吊杆索力测试研究

文章以弦振动理论为基础,推导了系杆拱桥索力测试的实用计算公式,分析了影响测试精度的若干参数,并对吊杆的边界条件、有效计算长度以及抗弯刚度等影响因素进行了分析和修正。采用牛顿切线法迭代得出有效计算长度,该方法为同类型桥梁的索力测试提供了良好的参考价值。通过分析大量数据,实用计算公式得出的索力值和模型理论值很接近,完全能够满足工程实践的要求。

Study on Suspender Force Testing of Large-span Tied Arch Bridges

This paper is based on string vibration theory, derives a practical calculation formula for cableforce test of tied arch bridge , analyzes some parameters that affect the testing accuracy, and the boundaryconditions, effective length, bending stiffness and other factors were analyzed and modified.The effectivecalculation length is obtained by the Newton tangent method, which provides a good reference value for thecable force test of the same type of bridge. By analyzing a large amount of data, the practical calculationformula is close to the theoretical value of the cable, and the practical calculation formula can meet therequirements of engineering pract ice.