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dc.contributorMEHMET T. TUMAY Program Manageren_US
dc.contributor.authorShahid Ahmad Principal Investigatoren_US
dc.datestart 01/01/1992en_US
dc.dateexpiration 12/31/1993en_US
dc.date.accessioned2014-04-02T18:18:52Z
dc.date.available2014-04-02T18:18:52Z
dc.date.issued2014-04-02
dc.identifier9114114en_US
dc.identifier.urihttp://hdl.handle.net/10477/22723
dc.descriptionGrant Amount: $ 75000en_US
dc.description.abstract***<br/>9114114<br/>Ahmad<br/>Ground vibrations generated by machine foundations or traffic can have an<br/>adverse effect on nearby buildings, equipment, and people, ranging from<br/>annoyance or discomfort to structural damage to the facilities. Therefore,<br/>for prevention of damage to adjacent structures and equipment nearby, in<br/>many cases it is necessary to significantly reduce the transmission of such<br/>vibrations. For high frequency vibrations, this objective can be achieved by<br/>placing a wave barrier between the source of vibration and the area to be<br/>protected. In-filled concrete and soil-bentonite trenches have been used in<br/>practice for many years as wave barriers.<br/><br/>The primary objective of the completed research was to conduct an<br/>experimental investigation on the influence of various geometrical and<br/>material parameters on vibration screening effectiveness of in-filled trench<br/>barriers and then utilize the experimental data to verify and calibrate the<br/>analytical findings. To achieve this objective prototyped model tests were<br/>conducted in field in a remote area near the north campus of SUNY at<br/>Buffalo. Both near field (active) and far field (passive) vibration<br/>screening by concrete and soil-bentonite in-filled trenches were studied. An<br/>electromagnetic vibratory oscillator was used as a vibration source to set<br/>out continuous wave trains at selected frequencies. Measurements of ground<br/>vibration at selected pickup points were made 'with' and 'without' the<br/>in-filled barrier in place. The effectiveness of the barriers was computed<br/>as the ratio of the ground motion 'with' and 'without' the barrier. These<br/>results were then compared with analytical solutions. Detail of this<br/>investigation has been presented in technical conferences, and will be<br/>published in ASCE's Journal of Geotechnical Engineering.As a result of this<br/>research, the present level of knowledge among engineers and scientists on<br/>vibration screening by in-filled trenches will advance considerably.<br/>***en_US
dc.titleExperimental Investigation on Vibration Screening Effectiveness of In-filled Trench Barriersen_US
dc.typeNSF Granten_US


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