Development of wireless measurement system for ground-borne vibration in buildings and measurements for vibration amplifications of detached houses

摘要

Environmental impact on humans in buildings is caused by ground-borne vibration from rail transit systems, road traffic, construction sites, and industrial plants. To estimate the effect of vibration on humans, it is necessary to measure the tri-axial vibrations in the vertical and horizontal directions in buildings specified in the international standard regulated by ISO 2631-2:2003. A wireless measurement system for simply and accurately measuring vibration in a building was developed. In this system, five wireless vibration measurement devices (installed with a data recorder in the building) are controlled simultaneously by outdoor mobile PC or laboratory PC via wireless LAN and an Internet connection. It sends the vibration acceleration waveforms recorded in the building over the network to the laboratory PC. The system was used for measuring vibration in two- and three-story detached houses of wooden or steel construction. The vibration amplifications caused by building structural resonance were evaluated as ratios and level differences in 1/3 octave band vibration accelerations measured at the ground near the substructure and floors in the houses in over 100 vibration measurements.