82 / 2023-04-05 16:25:52

Research on Dynamic Deformation Laws of Super High rise Buildings based on GB-InSAR Technology

super high rise building, GB-InSAR, wavelet analysis, health monitoring,spatial state visualization

It is well-known that structures composed of super high rise buildings accumulate damages gradually due to ultra-long loads, material aging, and component defects. Thus, the bearing capacity of the structures can be significantly decreased. In addition, these effects may cause inestimable life and property losses upon strong winds, earthquakes, and other heavy loads. Hence, it is necessary to develop real-time health monitoring methods for super high-rise buildings to deeply understand the running state during operation, discover potential safety potentials timely, and provide reference data for reinforcement design. Along these lines, in this work, the built super high rise buildings (Yunding Building) and super high rise buildings (Main Tower of Shandong International Financial Center) under construction were selected as the research objects. The overall dynamic deformation laws of super high rise buildings were monitored by using GB-InSAR technology for its advantages in non-contact measurement, remote monitoring, and real-time display of observation results. Denoising of the observation data was also carried out based on wavelet analysis. And hand-held LiDAR technology was used to visualize the spatial state of Yunding Building. From the acquired results, it was demonstrated that the measuring accuracy of GB-InSAR can reache the submillimeter level, while the noises under a natural state of wavelet analysis were eliminated well. The maximum deformation values of the Yunding Building and the Main Tower of Shandong International Financial Center under natural state are 9.632 mm and 16.458 mm, respectively. Under the sudden wind loads, the maximum deformation of the Yunding Building could be as high as 895.7951 mm. The overall motion state switched over among S-shaped pattern, hyperbolic-type, and oblique line, presented the characteristics of nonlinear elastic deformation.