Probabilistic evaluation of post-earthquake functional recovery for a tall RC core wall building using F-Rec framework. (15th February 2022)

• Record Type: Journal Article
• Authors: Terzic, Vesna; Kolozvari, Kristijan
• Is Part Of: Engineering structures. Volume 253(2022)
• Publication Date: 2022-02-15
• Subjects: Functional Recovery -- Region of High Seismicity -- 42-Story Building -- Probabilistic Recovery Curve; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2021.113785
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Detailed evaluation of the functional recovery of a 42-story reinforced concrete core wall building. Results are generated using the new, comprehensive framework for probabilistic evaluation of the building's functional recovery. While the building is expected to preserve the safety of its occupants even for very rare earthquakes, its functionality is compromised even for frequent earthquakes. The post-earthquake functional recovery time of considered tall building is primarily governed by the repair of structural components. Majority of building nonstructural systems (e.g., electrical, HVAC, partition walls, etc.) did not have great impact on the functional recovery time because their damage did not cause building closure. Abstract: This paper presents a detailed evaluation of the functional recovery of a 42-story reinforced concrete core wall building located at a site of high seismicity using a newly developed, fully probabilistic, and comprehensive analytical framework for the assessment of post-earthquake functional recovery of buildings. This innovative framework allows complete and detailed evaluation of the seismic performance of tall buildings considering all structural and nonstructural building components/systems, and the calculation of performance metrics relevant for the assessment of functional recovery, including building's post-earthquake functionality along with the duration and path of functional recovery. A nonlinear model of the building is created in OpenSees using a recently developed three-dimensional macro model for RC walls. Building seismic response is obtained for three seismic hazard levels corresponding to Service-Level Earthquake (SLE), Design-Based Earthquake (DBE), and Maximum Considered Earthquake (MCE). Based on the results of nonlinear analyses, damage-impaired losses are calculated using FEMA P-58 tools, while the building recovery process is evaluated using a novel framework for functional recovery (F-Rec framework). Building seismic performance obtained using new, advanced structural and recovery models suggest that the post-earthquake functionality of the tall building is primarily governed by the structural subsystem. In particular, for SLE, the functionality of the building is compromised mostly due to the damage to shear walls resulting in 3 to 6 months of functional recovery time (FRT); for DBE, the building's functionality is fully impaired due to significant damage to slab-column connections and shear walls (FRT = 8 to 13 months); and for MCE, the building's functionality is fully impaired due to significant damage to slab-column connections, shear walls, coupling beams, and partition walls (FRT = 12 to 16 months). Given the great contribution of tall buildings to community resilience, this study reveals a need for the development of design requirements for improving the post-earthquake functionality of tall buildings.