首页|Theoretical analysis on the measurement accuracy of embedded strain sensor in asphalt pavement dynamic response monitoring based on FEM
Theoretical analysis on the measurement accuracy of embedded strain sensor in asphalt pavement dynamic response monitoring based on FEM
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
Wiley
Embedded strain sensors are the primary measurement device for strain in thetensile layer of asphalt pavement. The favorable deformation compatibilitybetween embedded strain sensor and asphalt layer is the key to ensure the precisemeasurement of mechanical response. However, the good deformationcoordination may be difficult to maintain under different environments due tothe viscoelasticity of asphalt mixture. In this study, 4-point bending beam testswere performed to investigate deformation compatibility between embeddedstrain sensor and asphalt mixture under different temperature. Then, a quasistaticfinite element model (FEM) was employed to simulate static mechanicalresponse of asphalt pavement, and the design requirements for embeddedstrain sensor were proposed considering deformation coordination. In addition,the rationality of the design requirements of the sensor was further validatedin the dynamic response monitoring. The results indicate that thedeformation compatibility between embedded strain sensor and pavementmaterial changes at different temperatures. In order to ensure favorable deformationcompatibility, the reinforcement of the protective housing should beeliminated and the equivalent modulus (EM) of the sensitive element shall bethe same as that of the asphalt mixture. Considering the viscoelasticity ofasphalt mixture, the strain sensor with lower EM is recommended in thedynamic response monitoring of pavement structure. This study provides abasis for optimizing the embedded strain sensor of asphalt pavement from theperspective of deformation compatibility.
NETL
NSTL
Wiley
