Application of Distributed Optical Fiber Sensing in New Modular Building Health Monitoring

In order to study the mechanical properties of the composite structure system of modular integrated construction (MIC)-frame in Phoenix Tower during construction and use, a set of distributed optical fiber structure health monitoring system based on Brillouin scattering was designed and deployed, and then monitored during construction. Through the analysis of the monitoring data, the following conclusions were obtained: the test accuracy of the monitoring system met the engineering requirements; before the completion of the enclosure structure, the difference of temperature variation in different positions of the structure at the same time could reach 23 ℃, and the effect of temperature should be paid attention to in the construction stage. During the construction process, the temperature variation of the component was －18－16 ℃, the strain variation was (－150－210)×10^－6, and the additional temperature stress was －26.8－36.7 MPa. No abnormal response or damage occurred. The design and application of this monitoring system could provide a reference for the popularization of modular buildings and the application of distributed optical fiber monitoring technology in the health monitoring of modular buildings.