通过对申苏浙皖高速公路连续箱梁进行计算分析和试验研究,了解应力损失情况,研究竖向预应力损失随时间变化的规律,检验竖向预应力筋的实际使用效果,为竖向预应力在箱梁设计中的应用提供理论依据,研究成果对了解该类桥梁运营条件下的内力状况有极大帮助;对于国内同类桥梁的设计和施工也具有参考价值。 Through the calculation and analysis of the continuous box girder of the Jiangsu-Jiangsu-Zhejiang-Anhui Expressway, the situation of stress loss is studied, the law of vertical prestress loss with time is studied, and the actual use effect of vertical prestressing tendon is verified. The application of stress in the design of box girders provides the theoretical basis. The research results are of great help to understand the internal forces under the conditions of such bridges. They also have reference value for the design and construction of similar bridges in China.