INNOVATIONS IN SUSTAINABLE SEISMIC DESIGN

The purpose of this article is to supplement recently developed concepts for Seismic Sustainability (SS) of new and existing buildings through practical detailing and descriptions of structural parts needed to achieve Post Earthquake Realignment and Repairs (PERR). Post-earthquake Global Stiffness Reduction (GSR) and Restoring Force Adjustment (RFA) methodologies have been addressed at some length. Attention has been focused on how complete buildings, including gravity framing, Earthquake Resisting Structures (ERS), supplementary devices and non-structural elements can be realigned after predicted earthquakes. SS is a concept that requires a thorough understanding of the mechanics of sequential failures and PERR. In PERR the resilience of the non-ERS system is as relevant as that of the ERS and the nature of the restoring forces are as important as those generated by the earthquake. Performance control (PC) is achieved through Design Led Analysis (DLA), which in turn is influenced by controlled behavior of purpose specific objectives. In the interim two novel methods of nonlinear displacement analyses of efficient Moment Frames (MF) have been presented. Several generic examples have been presented.

کلیدواژه ها:

Rocking core ، Link beams ، Energy dissipating beams ، Collapse prevention ، Re-centering