![]() View the Kiwinet video: Dr Geoff Rodgers – Seismic damping solutions for buildings and joint implant diagnostics. Mechanical engineer Associate Professor Geoff Rodgers from the University of Canterbury won the Kiwinet 2017 Emerging Innovator Award for work that included developing a simplified seismic damper for buildings. ![]() ![]() The principle is still the same as the lead rubber bearing, with kinetic energy being converted into heat energy, thereby preventing the building absorbing the kinetic energy. When the direction of movement changes, the flow of lead is reversed. Ground movement forces the lead to pass through a narrow gap. In this case, the dampening is provided by a lead-based device that looks very similar to a car damper (shock absorber). Seismic dampersĪnother method for controlling seismic damage in buildings is the installation of seismic dampers. Using layers of steel with the rubber means the bearing can move in a horizontal direction but is stiff in a vertical direction. During an earthquake, the kinetic energy of the earthquake is absorbed into heat energy as the lead is deformed. Lead was chosen because of its plastic property – while it may deform with the movement of the earthquake, it will revert to its original shape, and it is capable of deforming many times without losing strength.
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