Earthquake shaking table
There are different experimental techniques which can be used to test the response ofstructuresand soil or rock slopes to verify theirseismic performance.One of these is using anearthquake shaking table(ashaking tableorshake table). This device is used for shaking scaled slopes, structural models or building components with a wide range ofsimulated ground motions,including reproductions of recordedearthquaketime-histories.
While modern tables typically consist of a rectangular platform that is driven in up tosix degrees of freedom (DOF)byservo-hydraulicor other types of actuators, the earliest shake table, invented at the University of Tokyo in 1893 to categorize types of building construction, ran on a simple wheel mechanism.[1]Test specimens are fixed to the platform and shaken, often to the point offailure.Using video records and data fromtransducers,it is possible to interpret thedynamic behaviourof thespecimen.Earthquake shaking tables are used extensively in seismic research, as they provide the means to excite structures such that they are subjected to conditions representative of true earthquake ground motions.
They are also used in other fields of engineering to test and qualify vehicles and components of vehicles that must respect heavy vibration requirements and standards. Some applications include testing according to aerospace,[2][3]electrical, and military standards.[4]Earthquake shaking tables are essential in model testing contests, where participants evaluate designs developed within specific guidelines against simulated seismic activity.[5]Simple shake tables are also used in architecture and structural engineering primarily for educational purposes, helping students learn how structures respond to earthquakes through hands-on model testing.[6]
See also
[edit]References
[edit]- ^Reitherman, Robert (2012).Earthquakes and Engineers: An International History.Reston, VA: American Society of Civil Engineers. pp. 126–127.ISBN978-0-7844-7635-2.
- ^NASA’s Space Power Facility
- ^Bruyne, Stijn & Marques dos Santos, Fabio & Peeters, Bart & Anthonis, J & Appolloni, M & Cozzani, A. (2012).Model based control of a multi-axis hydraulic shaker using experimental modal analysis.European Space Agency, (Special Publication) ESA SP. 691.
- ^United States Department of Defense,ed. (31 Oct 2008)."MIL-STD-810G, Department of Defense Test Method Standard for Environmental Engineering Considerations and Laboratory Tests".
- ^"Dask Depreme Dayanıklı Bina Tasarımı Yarışması – ABOUT CONTEST".binatasarimi.dask.gov.tr.Retrieved2024-08-12.
- ^Karadag, Omer; Canakcioglu, Nevset Gul (2024-07-03)."Teaching earthquake-resistant structural systems in architecture department: a hands-on learning experience".Architectural Science Review.67(4): 332–344.doi:10.1080/00038628.2023.2288967.ISSN0003-8628.
Further reading
[edit]- IEEE 693-2018: "IEEE Recommended Practice for Seismic Design of Substations",Institute of Electrical and Electronics Engineers,2018.
External links
[edit]
Media related toEarthquake simulationat Wikimedia Commons- Hydra shaker– European Space Agency
