![]() Some specially designed earthquake simulators can be used in public locations, such as museums or universities, in order to give observers - and, in some cases, riders - an idea of what a real earthquake entails. In industry, for example, shake tables are used to assure that the safety equipment in a nuclear power plant will perform correctly during and after an earthquake. ![]() This includes ensuring the stability of structures such as hanging fixtures, the attachment of shelving and other fixtures to walls, and ensuring that any furniture present will not tumble about in the event of an earthquake or any moderate to severe vibrational force. This simulation is useful for the investigation of engineering problems related to maintaining safety during an earthquake. These tables can move in three dimensions and vibrate to realistically reproduce earthquake motions and the RRS. ANCO’s seismic shake tables are used to simulate the vibrations of an earthquake in a safe and controlled manner. () is a producer of custom-built shake tables and portable vibration testing equipment since the company’s establishment in 1971. ![]() Real world engineering: ANCO earthquake simulationĪNCO Engineers, Inc. RRS are typically used when a quick description of the earthquake is needed, as they clearly indicate what effects a certain waveform will have on a certain building. The equipment that reproduces these motions is called a shake table. This RRS can then be used to create a motion in the lab to simulate a quake based on its particular wave patterns, allowing for further study through the reproduction of the original motions. When an engineer wishes to perform a test on a structure in the laboratory, he or she defines a Required Response Spectrum, or RRS. The Response Spectrum is a measure of how much a structure will respond to that particular earthquake and depends on the stiffness and mass of the structure and its damping. The interaction of an earthquake with a structure is modeled by engineers, particularly civil or structural engineers, to produce the Response Spectrum for that particular quake. The seismic waveforms generated during a quake depend on many factors including including fault geometry and rock type, wave travel path, soil composition, nearby mountains and other geological structures, and location of the origin of the quake. Earthquakes are not all alike, and are identified by their strength on the Richter Scale of magnitude. ![]()
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