Online School of  Earthquake Resilient Design

This two-lecture-series develops a comprehensive understanding of advanced seismic analysis, design, and experimental testing behavior of base-isolated buildings located near major faults (earthquake magnitude M6.2 to M8.0). The lectures use an end-to-end approach extending from nonlinear response of SDOF systems representing seismic isolation and experimental testing of devices and base-isolated buildings up to 3D nonlinear response history analysis (NLRHA), in ETABS Ultimate, of 20-story tall base isolated buildings.

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Lecture 04 presents the fundamentals of the nonlinear dynamic behavior of various seismic isolation systems including the following devices: friction bearings, rubber bearings, and nonlinear viscous dampers. Using nonlinear SDOF analysis the response of seismic isolation systems to strong near-fault pule-like ground motions is studied and their equivalent linear analysis is presented. The theoretical as well as the experimental mechanical behavior of various isolation systems is presented.

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Lecture 05 presents the 3D NLRHA and seismic design of two base isolated buildings, 10- and 20-story tall. The response and design of the of the base isolated buildings is compared with the corresponding fixed-base designs presented in detail in Lecture 03. The buildings use a RC core-wall above the isolation plane. The incremental cost of base-isolated earthquake-resilient buildings is calculated. This lecture also presents examples of constructed base-isolated tall buildings (up to 45-story tall) as well as the effect of inelastic behavior of the superstructure of base-isolated buildings.