Reliability-based seismic assessment of controlled rocking steel cores. (December 2021)

• Record Type: Journal Article
• Authors: Rahgozar, Navid; Pouraminian, Majid; Rahgozar, Nima
• Is Part Of: Journal of building engineering. Volume 44(2021)
• Publication Date: 2021-12
• Subjects: Controlled-rocking steel cores -- Monte Carlo simulation -- Probability failure -- Reliability index -- Sensitivity analysis; Building -- Periodicals; 690.05
• DOI: 10.1016/j.jobe.2021.102623
• Languages: English
• ISSNs: 2352-7102

Abstract

Abstract: Controlled-rocking steel cores (CRSCs) effectively prevent earthquake-induced residual damage while may suffer large lateral displacements. This paper gives a particular emphasis on examining the seismic reliability of CRSCs. Accordingly, extensive nonlinear dynamic analyses are conducted for low- and mid-rise archetypes. A set of random variables (RV), including geometry parameters, material properties, and design details of post-tensioned cables (PTs) and energy dissipations (EDs), are considered for reliability assessment. The vectors of RVs are generated by Monte Carlo simulation for 5, 10, and 15% coefficient of variations. Considering uncertainty associated with RVs, peak displacement responses for CRSCs are determined under 44 far-field ground motions. The probability failure and reliability index are quantified for three performance levels, and sensitivity analysis is performed to measure the significance of RVs. Results indicate that the design procedure is reliable and the safety of CRSCs is provided; however, the probability failure for mid-rise CRSCs is more than low-rise archetypes. Highlights: Seismic reliability for quantifying uncertainties of low-to high-rise CRSCs under far-field motions. Effects of random variables and associated uncertainties on probability failure and reliability index. Sensitivity analysis of random variables on lateral displacement responses. Monte Carlo simulation for safety analysis with 5, 10, and 15% coefficient of variations.