BUILDING RESPONSE AT FOUNDATION, WALLS, COLUMNS AND FLOORS DUE TO GROUND VIBRATION - SIMPLIFIED CALCULATION BASED ON EXPERIENCE WITH DETAILED MODELS AND MEASUREMENTS

摘要

Construction work such as pile driving and soil compaction or road and railway traffic excite nearby buildings, and the perceptible or audible vibration can be a nuisance for the inhabitants. A simplified building model has been created for these situations, which includes the effects of soil-structure interaction, the low-frequency amplification along the height of the building as well as the high-frequency reduction, and the floor resonances. The model consists of one wall for all supporting structures (walls and columns) and one floor for each storey. The effect of different floor resonance frequencies is included in a stochastic procedure. The soil is modelled by a spring and a viscous damper, and the free-field amplitudes of the soil are applied under this soil element. The model can be calculated by transfer matrices or in a continuous wave-type version where an analytical solution can be evaluated numerically. The building response in the high-frequency (acoustic) region is calculated as mean values over wider frequency bands. The approach to an infinite building model can be found for these high frequencies and the corresponding soil-structure transfer can be described by the ratio of impedances at foundation level.