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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Vibrationsmätning : Förslag på placering av vibrationsmätare i moderna byggnader

Erlandsson, Erik, Jonsson, Martin January 2016 (has links)
This report aims to outline a number of attachment methods for the geophones used in vibration measurements. On behalf of Bjerking AB and their department for environmental control and vibration, a new attachment method has been developed that works on today’s building designs. Suggested mounting methods include some methods with their main stronghold in the foundation’s outermost layer and some with mounting in the concrete inside the foam. The best method is to drill through the foam and with a concrete screw - suitable for concrete drilling without plug - and anchor the geophone in the concrete. Due to the difficulty to get a hold of these screws with the required length and diameter for the current case, a similar approach with available material has been developed. This method includes a hammer drill, a threaded rod, an expander and two nuts. The conclusion drawn is that the attachment of the concrete is preferable and that this can be achieved with relatively simple means. Other methods require extensive knowledge of the building’s design as well as advanced and time-consuming tools.

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