斜塔斜拉城市景观桥梁施工监控应变测试误差分析及修正方法研究

Study on Error Analysis and Correction Method for Strain Testing Construction Monitoring of Inclined Pylon and Cable-stayed Landscape Bridge

在桥梁施工监控过程中,常会埋设较多振弦式应变传感器来监测桥梁结构控制截面的应力。但由于受传感器安装误差、温度变化以及混凝土收缩、徐变等因素影响,造成测试的结果与实际应力水平往往差别较大。通过对影响测试结果因素的分离、剔除与修正,得到结构弹性应变,并给出简易计算公式。结合工程实例,验证了计算方法的可行性和可靠性。

Many vibration wire strain sensors are buried to monitor the stress of control section of bridge structure in bridge construction monitoring. There is great difference between the test stress and actual stress due to the effect of installation error of sensors,temperature change,concrete shrinkage and creep and so on. The elastic strain of the structure and concise calculation formula are obtained by the separation,rejecting and correction of test results. Based on engineering example,the feasibility and reliability of the calculation method are verified.