Experimental Study of Road Traffic Vibrations Impact on Heritage Buildings in Braila, Romania

摘要

In this paper we analyse only the road traffic influence because-on the long-term-these vibrations cause irretrievable damages on heritage buildings. Braila is a true open-air museum; here there are lots of old buildings of undeniable beauty placed near roads with heavy traffic. In traffic, most vibrations occur because of trucks and buses. Cars and minibuses vibrations do not have significant impact, but if intense traffic, they should be taken into account. We have analysed the factors influencing the level and frequency of vibrations: the type and condition of roads, type and condition of the car, etc. We analysed the vibrations transmitted to the sidewalks in front of the houses, in the middle and on the interior walls of the ground floor, 1st floor and 2nd floor, for different speeds of the cars. It was found that accelerations of the buildings resistance structures are higher in case of lighter cars running with the same speed. It was found that accelerations of the buildings resistance structures are higher in case of lighter cars running with the same speed. The frequencies for which maximum accelerations were found (around 2 m/s~2) are below 30 Hz. A few solutions have been proposed for reducing and preventing the destruction of buildings and protecting people: road repairs, reducing traffic, barriers built into the ground.