The effects of vibrations in buildings and other structures, can be multiple, but are the highlight, as most important, the effects on people and in the integrity of the structures. In order to respond to the needs that regularly appear on the characterization of this type of situations, the dBwave, Since last year, is accredited by IPAC, to perform the following tests: Read more
The dBwave renewed your accreditation for conducting evaluation test of impulsive vibrations in structures, According to the NP2074 standard:2015 by IPAC – Portuguese Institute of Accreditation, According to ISO standard 17035.
Mining and geotechnical activities that induce dynamic stresses on the land, namely: the dismantling of rock masses with use of explosive substances, pile driving, dynamic compression of grounds, among others, originate impulsive stress and subsequent vibrations in nearby structures, which, in consequence, may be damaged. Read more
Unlike what happens in other countries, the criteria for evaluation of the effect of continuous vibrations in structures are not set out in legislation, in Portugal.
To fill this gap the dBwave believed the realization of evaluation of continuous vibrations in structures, According to the methodology of the DIN 4150-3:1999, by IPAC. Read more
DISCOMFORT OF VIBRATIONS
When there are noise nuisance complaints very often occur simultaneously vibration nuisance complaints. Being the assessment of discomfort a difficult task, due to the subjective component of this human reaction, This difficulty increases because the, contrary to what occurs with noise, the criteria for discomfort of vibrations are not well established in Portugal. So who makes the assessment is often, in difficulty to draw conclusions. In this article pass in review the factors that influence the discomfort due to vibration, criteria used in evaluation and your requirements of measurement instrumentation.
2 HUMAN RESPONSE TO VIBRATION IN BUILDINGS
The following are the factors that influence human reaction to discomfort vibrations in buildings:
• Thresholds of perception
• Frequency response of the perception threshold of the human being
• vibration level
• Exposure time
• Type of vibration
• Type of use of the building
• Time of day and activity of people
• The attitude of the people Read more