The analytical expressions of constraint force , internal force on cross section , and flexibility of the rod are obtained via the first integrals 利用方程的初积分导出约束力、截面内力及挠性线的解析表达式。
The content of this research mainly include : 1 ) with the increasing loss of tie bars ’ sections , variation laws of cable force , internal force and displacements in each monitoring spots are analyzed on work conditions of constant load , light rail , automobiles and temperature . on this basis , the evaluating indexes of safety state of tie bars are determined 主要研究内容为: 1 )分析了恒载、轻轨、汽车和温度作用工况下,随着系杆截面损失的增大,系杆索力和桥梁各监测点内力及位移的变化规律,确定了评估系杆安全状态的评估指标。