Life-Cycle Cost Model and Design Optimization of Base-Isolated Building Structures

Abstract

Design of economic structures adequately resistant to withstand during their service life, without catastrophic failures, all possible loading conditions and to absorb the induced seismic energy in a controlled manner, was subjected to intensive research so far. Costly and extremely sensitive equipment, vital in commerce, business, education, and/or health care represent the contents of the contemporary structural systems. Frequently, structures themselves are less valuable than their contents. Moreover, following a catastrophic natural disaster, local communities requires that communication and emergency centers, hospitals, police, and fire stations to be fully operational. In conventional constructions, high floor accelerations are encountered in case of stiff buildings or large interstory drifts in flexible ones. These structural performance characteristics cause difficulties in protecting both building and its contents. As an efficient alternative design practice, base-isolated structures are considered, compared to the conventional fixed-base one. A critical evaluation of optimized fixed and base-isolated reinforced concrete buildings is performed in this study, with respect to the initial and total cost taking into account the life-cycle cost.

Life‐cycle cost optimization of semiactive magnetorheological dampers for the seismic control of steel frames

“…The references of Table 1 present the expected loss ratios for buildings under the earthquake excitations. Because these ratios are dimensionless, they have been used in different sites (e.g., previous studies [2][3][4][5][6][7] ).…”

“…[ 1 ] Therefore, in recent studies, the life‐cycle cost has been the seismic optimization goal of designing the control system for retrofitting (or seismic design) the structures. [ 2–9 ] Mitropoulou and Lagaros [ 3 ] investigated the performance and cost of seismic isolators using life‐cycle cost analysis. They showed that although the seismic isolator system is expensive, the life‐cycle cost is less than its fixed counterpart.…”

Computational Structural Engineering: Past Achievements and Future Challenges

“…However, the explicit quantification of uncertainties is still a major challenge (Takewaki, 2015). The development of appropriate methods for uncertainty quantification will receive much attention in the years to come with different computational models such as fuzzy analysis, classical probabilities, probabilistic hazard analysis (Mori et al, 2017), methods for uncertainty quantification such as robust design, reliability-based design (Lagaros et al, 2007), life-cycle optimal design (Mitropoulou and Lagaros, 2016), sensitivity analysis and others. These methods will create new opportunities to meet the long-standing challenge of delivering quantitative predictivity in computational mechanics and engineering.…”

An investigation of the structural nonlinearity effects on the building seismic risk assessment under mainshock–aftershock sequences in Tehran metro city

“…In addition, the capacity spectrum method, applying the pushover analysis approach, was presented by the Federal Emergency Management Agency (2013), while many other researchers worked with the dynamic time history analysis method for the life-cycle cost assessment of buildings such as the ones performed by Porter et al (2004), Lagaros (2007), Mitropoulou et al (2011), Gencturk et al (2016) Loli et al (2017), Sharmin et al (2018), Rabonza and Lallemant (2019), and Noureldin and Kim (2021). Besides, in another field, several other research works have been published with the focus on the application of vibration control systems in the reduction of buildings’ life-cycle cost (Park et al, 2004; Gidaris and Taflandis, 2012, 2015; Mitropoulou and Lagaros, 2016). The main disadvantage of all works, similar to the mentioned ones, is missing the aftershock effects in the evaluation of the life-cycle cost due to earthquake scenarios.…”