Monitoring the changes of dynamic characteristics of a high-rise building

S Y Yerzhanov, V A Lapin, Y S Aldakhov
2019 Journal of Physics, Conference Series  
To assess changes in the dynamic characteristics of the 25-storeyed building of the Kazakhstan Hotel in Almaty, an analysis of instrumental records of the station of engineering seismometric service was carried out. The building is located near the tectonic fault. During two earthquakes, representative instrumental data were obtained at the Seismic Station No. 16 ("High-rise Hotel"), equipped with digital instrumentation and measurement system. The building is twenty-five-storeyed with a
more » ... ing core, built in 1976. Using the ADXL accelerometers and the RSM-32 recorder, high-quality instrumental records of accelerations were obtained in the basement, on the floors and on the roof of the building, and spectral curves β were also built. The peculiar features of the dynamics of the specified building are noted during earthquakes. Periods of the building oscillation on the main and second modes of oscillation were revealed on exposure to a remote earthquake. Comparison of the dynamic characteristics of the house was carried out according to the measurements of 1977 and 2018. It has been established that there is a significant increase in the magnitude of the oscillation period on the first form by 25-48% as compared to the measurements of 1976-1977 over the 40-year period of operation.
doi:10.1088/1742-6596/1425/1/012008 fatcat:sautpyjb6rao7mzlaw3w7mpsu4