Generation and the measures of impact sound by stick-slip phenomenon at beam joint in buildings (the first report)

Abstract

It is often happened to be annoyed by the sound of an uncertain cause in the completed buildings. The phenomenon might be repeated indefinitely though most of these sounds are canceled with the passage of time. This paper reports a series of processes from the investigation of the cause, to effective measures on the case in a high rise housing complex. And the ascertained cause is thought to give a systematic explanation to this kind of uncertain sound in buildings. The outline of this paper is as follows. (1) It paid attention to the vibration wave form (phase) to which it propagated in the building frame to specify the position in the plane of the slab, the vibration accelerometers were arranged in two dimensional distribution on the slab, and the source was ascertained adequately. (2) It was clearly specified that the cause of generation was ‘‘stick-slip phenomenon’’ in the beam joint part from the wave form of the generated sound and its spectrum of the vibration. (3) Appropriate measures construction of completely controlling movement in this case was executed by being able to specify the cause of generation and the effect was confirmed.