Discussing the Initial Temperature Difference Correction Method for Vibrational Chord Strain Gauge in Bridge Construction Monitoring

作者：Yang, Jun^*; Zhang, Hong; Zhou, Jianting; Xu, Bojian; Shan, Aicheng

来源：Intelligent Automation and Soft Computing, 2016, 22(2): 331-339.

DOI：10.1080/10798587.2015.1095486

• Construction monitoring
• vibrational chord strain gauge
• temperature difference correction
• linear regression

Strain monitoring is an important part of the bridge construction monitoring. The strain obtained from field measurements is usually affected by a variety of factors, an important one of which is temperature difference between the initial temperature and measured temperature. Based on the in-depth introduction of vibrational chord strain gauge's working principle, this part of error is analyzed. Through experiments, it is found that there is a significant linear relationship for initial temperature difference effect. On this basis the temperature difference correction fitting values are calculated and linear regression model is established for analysis. Finally, a field project application for a continuous rigid-frame bridge in Province Yunnan, China was conducted, and the results showed that using strain test fitting values to revise, the calculated stress is quite close to the theory one of structure. This correction method effectively eliminated this part of strain caused by temperature difference.

• 出版日期2016
• 单位重庆交通大学