Structural damage accumulation and control for life cycle optimum seismic performance of buildings

Abstract

Seismic reliability and expected performance functions of structural systems are sensitive to the process of damage accumulation associated with the random sequences of ground motion excitations that those systems may experience. Optimum life cycle-based engineering decisions must examine the influence of concepts related to both the target safety level of the initial system and the eventual repair and maintenance actions that may be undertaken during the life of the system. This study includes an overview of the general framework supporting these decisions as well as some available results about (a) the influence of damage accumulation of the seismic vulnerability functions of building structures, (b) approximate estimates of accumulated damage and (c) optimum damage threshold values for repair of structural frames or replacement of energy dissipating devices. Some comments are presented concerning desirable studies about life cycle optimisation of systems exposed to different types of excitations.

Measurement-based support for post-earthquake assessment of buildings

“…Also, despite being thoroughly standardized (through codes such as ATC20 in America and AeDES in Italy (Baggio et al, 2007)), visual inspection outcomes are prone to much subjectivity (Galloway et al, 2014;Goretti & Di Pasquale, 2002;Goretti, Hutt, & Hedelund, 2017). In addition, slightly damaged buildings may have significantly increased vulnerability during aftershocks (Esteva, Díaz-López, Vásquez, & León, 2016;Ghosh, Padgett, & Sánchez-Silva, 2015;Jalayer, Asprone, Prota, & Manfredi, 2011;Jalayer & Ebrahimian, 2017;Raghunandan, Liel, & Luco, 2015). Such increased vulnerability is not easily captured by visual inspections that mainly provide estimations of structural performance during the main shock (Marshall et al, 2013).…”

Confiabilidad de edificios con contravientos restringidos al pandeo expuestos a secuencias sísmicas en el tiempo

“…Esteva et al (2015) presentan un estudio para la estimación del daño estructural en edificios regulares de seis y diez niveles, con la finalidad de evaluar de manera general la magnitud de la influencia de la acumulación de daño. En la investigación se considera la interacción suelo-estructura y el uso de dispositivos de disipación de energía; expresando el daño estructural en términos de un indicador global de daño.…”