The vibrations induced in the structure of a 13 storey reinforced concrete residential building by the blasting of underground rocks and boulders during subway construction were measured and subjected to computational modelling. The building, located at the foot of a hill, consisted of two residential towers of 10 storeys on top of a three-storey basement. The rear tower foundations extended to the bedrock, whilst the front were on soil. Finite element modelling was used, assuming linear elastic behaviour. Six accelerometers were positioned at different heights above the ground to measure the building vibrations. The blast vibrations propagating through the soil strata exceeded the clear perception threshold, causing damage to non-structural elements and accelerating settlement of the shallow footing foundations. It is proposed that computational modelling techniques should be applied to building design, to forecast material damage and adverse human reaction to vibrations. 8 refs.
Primary author(s): Carvalho E M L;Battista R C
Vol.156, No.3, 2003, p.243-253