1d Wave Propagation Analysis and Shear-Wave Velocity Extraction of Super High-Rise Buildings Based on Veritical Microtremor Observation Array

Abstract

Because shaking modes of super high-rise buildings are very complicated, it is not enough to perform health-monitoring only for the whole structures. We try to extract story-by-story shear-wave velocities applying the deconvolution method to microtremor records measured at super high-rise buildings. The shear-wave propagation (including reflection, transmission, and interferometry at the boundary of stories) extracted from microtremor records are compared with those simulated ones using 2-D frame models with different mass-and-rigidity distributions which lead to different shaking modes. Story-by-story shear-wave velocities can be extracted from buildings whose shaking modes of all the stories are mainly shear modes. However, the shear-wave velocities of the buildings cannot be extracted successfully, if the stories are shaking in pure bending mode, because no inter-story shear deformation happened, the apparent shear-rigidities of these stories can be seen as infinite, which lead shear-wave travel times to zero.

CNN‐based damage detection of buildings from wave propagation between two adjacent floors

“…In addition, the application of wave propagation methods has also been explored. Wang et al 14,15 compared the differences in shear wave velocities extracted from microtremor records before and after damage occurred. They discovered a relationship between wave velocities and the stiffness of buildings, proposing this as a method for evaluating interstory damage.…”