Vibration assessment in buildings from the underground trains

Abstract

The method approved by the Moscow government in 1997, which has been implemented by the regulation ‘‘Guideline for assessment of vibration from underground train operation in dwellings and administrative buildings’’ [1998, Moscow, TIMR], is considered. The method is based on the control of nonsteady vibration by two normative parameters: maximum and equivalent values of rms acceleration, and assessment is made as for frequency-weighted quantities, and so in octave frequency bands at the range 22, 5–90 Hz. The method makes it possible to determine the values of maximum effective rms acceleration during the rating time stated. The procedure of equivalent rms acceleration calculation is analogous to one of DIN 4150, part 2, and the train operation schedules during the rating times are used. Results of testing the method at one of the Moscow Metro lines are discussed. Recommendation on the enlargement of the frequency range controlled and on the correction of the criterion of the frequency-weighted rms acceleration assessments are proposed.