Roof Isolation with Tuned Mass-based Systems and Application to a Prefabricated Building

Abstract

The earthquake-resistant design of prefabricated buildings is currently the focus of attention, especially for industrial buildings that require a high level of seismic protection. The standard design approach, based on ductility requirements, may succeed in preventing building collapse during a severe earthquake, but at the expense of accepting a high damage level at the column bases. To improve the seismic performance of such buildings, different innovative techniques have been proposed. However, these have not been widely implemented in engineering practice due, among others, to the lack of simple conceptual design methodologies. To achieve this goal, a methodology for the design of a roof isolation system is presented, where the roof isolation serves as non-conventional tuned mass damper (TMD), giving a significantly reduced response in terms of displacements and forces. To that effect, design expressions for the TMD period and damping, depending on the building and soil characteristics, are proposed: The expressions have been calibrated based on numerical parametric time history analyses considering Eurocode 8 spectrum-compatible accelerograms. The application of the proposed methodology is demonstrated for a two-story prefabricated building. N. Nisticò (B) Keywords Tuned mass damper · Roof insulation system · Optimal tuning ratio · Optimal damping ratio · Unconventional TMD List of symbols m sMass of the main system m TMD Mass of the secondary system (TMD) k s Stiffness of the main system k TMD Stiffness of the secondary system (TMD) c TMD Viscous damping of the secondary system (TMD) ω TMD Frequency of the secondary system (TMD) ω s

Research on Supplier Selection of Prefabricated Building Elements from the Perspective of Sustainable Development

“…Prefabricated buildings can be traced back to 1940, which refers to buildings built with elements produced in the component production factory and then delivered and assembled at the construction site [1]. Prefabricated buildings have advantages of high construction efficiency, being cost-saving, and environmentally friendly.…”