Research on Health Monitoring for Large Span Steel Structures

Large span steel pipe truss structure has complex space forms. Each bar interacts with each other. As an example of the gymnasium of Xining Haihu, the health monitoring technology of Fiber Bragg grating sensors and the vibrating wire sensors is introduced in the application of the gymnasium construction stage. This paper expounds on the arrangement of the health monitoring system, monitoring methods, measuring point arrangement, etc. Analysis of monitored data shows that in the construction phase, the stress in each primary bar changes stability, the internal force is much smaller than the yield strength of steel. Besides, the stress in each bar is always under the service limit state, which meets the design requirements. Each ring displacement monitoring data change stability, structural stiffness is rich in reserves. To Xining Haihu gymnasium in the process of using security is a critical evaluation index; at the same time, relevant experience and data provide a reference for similar health monitoring project.