Abstract: An earthquake force limiter and energy dissipater for racks or buildings. The device allowing stable yielding action of a flexure plate to enable control structures or standard structural frames to form a stable cycling high displacement elasto-plastic mechanism in resistive response to a seismic ground motion input. The stable flexural yielding of the plates limits the magnitude of forces developed within the control structure of which the plates are part of; or within a standard structural frame found in racking structures or general building structures, which the plate is typically directly supportive of. The design reduces prying action or tensile or compressive membrane forces developing in a plate of the device; so that the plate can maintain a stable constant resistive force while yielding to high transverse displacements.

Abstract: A control structure comprising a pivotably based rocker frame assembly integral with rotary yield units able to produce a constant resistive yield force through high elasto-plastic displacements and high ductilities. Located within and distributed about the rotary yield units are flexural yield plates with particular boundary conditions enabling them to elasto-plastically flex to high cycling elasto-plastic displacements and high displacement and curvature ductilities, while maintaining a constant resistive yield force.

Abstract: A control structure device for racks or buildings. The device is able to limit forces developed within itself or a structure (e.g. building or storage rack) it connects with and is seismically supportive of as it endures ground or base motion input from a seismic event. The control structure may comprise a relatively inflexible rocker frame which is pivotably connected to a foundation. Rotation of the rocker frame causes a flexural member to flexurally displace to limit force and energy in the system.

Abstract: A control structure comprising a pivotably based rocker frame assembly integral with rotary yield units able to produce a constant resistive yield force through high elasto-plastic displacements and high ductilities. Located within and distributed about the rotary yield units are flexural yield plates with particular boundary conditions enabling them to elasto-plastically flex to high cycling elasto-plastic displacements and high displacement and curvature ductilities, while maintaining a constant resistive yield force.

Abstract: A control structure device for racks or buildings. The device is able to limit forces developed within itself or a structure (e.g. building or storage rack) it connects with and is seismically supportive of as it endures ground or base motion input from a seismic event. The control structure may comprise a relatively inflexible rocker frame which is pivotably connected to a foundation. Rotation of the rocker frame causes a flexural member to flexurally displace to limit force and energy in the system.

Abstract: An earthquake force limiter and energy dissipater for racks or buildings. The device allowing stable yielding action of a flexure plate to enable control structures or standard structural frames to form a stable cycling high displacement elasto-plastic mechanism in resistive response to a seismic ground motion input. The stable flexural yielding of the plates limits the magnitude of in forces developed within the control structure of which the plates are part of; or within a standard structural frame found in racking structures or general building structures, which the plate is typically directly supportive of. The design reduces prying action or tensile or compressive membrane forces developing in a plate of the device; so that the plate can maintain a stable constant resistive force while yielding to high transverse displacements.