The ability to dissipate structural energy from seismic, wind and impact loads in a controlledand repeatable manner is essential to maintaining structural integrity for a range of large environmental loads.Extrusion based damping technology is a promising method of achieving these design requirements and is alreadywidely used in base isolation applications. However, the large size of current devices prevents severalunique implementations limiting their widespread use. This research develops high force-to-volume extrusiondampers small enough in volume for use in typical structural connections. Re-centering extrusion-based devicesextend the technology to high impact loading applications. Design, analysis and experimental verificationhas been undertaken on lead extrusion dampers sufficiently compact to allow direct placement into universalcolumn sections nominally 350mm deep (W14). Peak force levels up to 450kN with strokes up to50mm are developed with an optimal (almost fully rectangular) hysteresis loop. Shock absorbers for highforce impact loading applications with some recentering capability are developed, with stiffness values up to3.6 MN/m, and force levels up to 300-400kN. These latter devices have significant potential for industrialstructural impact loading applications, such as moorings of large ships. The overall results indicate thatmaximum energy dissipation with high force/volume relationships can be developed and characterized forlead extrusion dampers
展开▼
