Valuation of Influence of Blast-induced Vibrations on Buildings by
This paper discusses the application of a fiber-optic system to determine and evaluate the effects of blast induced vibrations on buildings. For the first time ever in quarrying,so-called fiber Bragg gratings have been used to measure the wall strain and crack displacement in a residential structure at varying time intervals. The comparison of the results with measurements of common short-term vibration geophones shows the distinct advantages of this fiber optic technology. Other factors,such as temperature,geologic conditions,solar radiation and other seismic activities,can also influence the crack and the wall strain response of buildings which can not be investigated with common geophones.It has been possible in the case study presented to prove the major influence of the outside temperature on the crack and the wall strain response,while the blast vibrations turned out to have only a minor influence.The results of this study show that any dynamic strain and movement of the building superstructures can be measured and analyzed with fiber Bragg gratings and that the influence of blasts can be evaluated.
Blasting Blast vibration Fiber Bragg grating Crack displacement, Stress and strain
Direct Measurements Carsten Drebenstedt Juraj Ortuta
Institute of Mining and Special Construction Engineering,Technische Universit(a)t Bergakademie Freiberg,Germany
国际会议
北京
英文
695-705
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）