For the complex composition of asphalt concretes, it is generally accepted that the simplified theoretical and simulated results can just provide a rough instruction for the structural analysis. To reflect the deformation characteristics and identify the random damage of long-span pavements, it is particularly important to develop smart optical fiber sensing technology to monitor the in-situ behaviors. The study is intended to develop optical fiber sensors with enhanced function to monitor the three-dimensional information of multi-layered asphalt pavement for the long-term structural performance assessment. A monitoring scheme based on the special design of fiber Bragg grating (FBG) based sensors is developed to conduct the full-scale condition monitoring of asphalt pavements in cold area. Sensors developed for temperature, strain and pressure are layout in different positions and layers. Structural information of the asphalt pavement in field is recorded by the embedded sensor networks. Based on the long-term and effective in-field data, the performance of the tested asphalt pavement responded to the temperature shrinkage, tensile strain and permanent deformation has been judged. The study can provide scientific instruction for characterizing the inner strain and temperature variation of multi-layered pavements in cold area.  
Keywords: asphalt pavement, FBG sensors, temperature distribution, strain monitoring, condition assessment 

Dr. Huaping Wang is currently an Associate Professor at School of Civil Engineering and Mechanics, Lanzhou University, China. She received her Bachelor degree (2007) and Master degree (2009) from Wuhan University of Technology, China and her PhD degree (2015) from Dalian University of Technology, China (Lab of academician Jinping Ou, the international famous group in structural health monitoring). She was a visiting scholar at The Hong Kong Polytechnic University between 2015 and 2017 (Prof. Jian-Guo Dai and Chair Prof. Yi-Qing Ni in structural monitoring and control of high-speed railway station based on optical fiber sensors). She worked in National Engineering Laboratory for High-speed Railway Construction of Central South University from 2017 to 2018 (Changjiang Prof. Lizhong Jiang). Her research interests include structural health monitoring, optical fiber-based sensing technology, strain transfer theory, smart sensors and structures in engineering, damage identification, and condition assessment. She has published more than 30 papers in reputed SCI and EI journals.