Seismic safety of valuable non-structural elements in RC buildings: Floor Response Spectrum approaches. (15th February 2020)

• Record Type: Journal Article
• Authors: Berto, Luisa; Bovo, Marco; Rocca, Irene; Saetta, Anna; Savoia, Marco
• Is Part Of: Engineering structures. Volume 205(2020)
• Publication Date: 2020-02-15
• Subjects: Non-structural elements -- Floor response spectra -- Valuable elements -- Seismic assessment -- Building codes -- Seismic demand; ASCE 7-10 ASCE Standard ASCE/SEI 7-10 -- CW Cantilever Wall -- DLS Damage Limitation State -- EC8 Eurocode 8 -- FRS Floor Response Spectrum -- HVAC Heating, Ventilation and Air Conditioning -- MIT19 Ministry of Italian Infrastructures and Transportation, Commentary of Italian Building Standard (2019) -- MIT19-MRF simplified FRS formulation for Moment Resisting Frame (MRF) buildings according to MIT19 -- MIT19-Nmodes multimodal FRS formulation according to MIT19 -- MIT19-Simp-Nmodes simplified multimodal FRS formulation according to MIT19, calculated with N vibrational modes -- MIT19-Simp-1mode simplified multimodal FRS formulation according to MIT19, calculated with first vibrational mode -- MRF Moment Resisting Frame -- NS nonstructural -- NZS 1170.5 New Zealand Standard (1170.5:2004) -- PFA Peak Floor Acceleration -- PFV Peak Floor Velocity -- PGA Peak Ground Acceleration -- PGV Peak Ground Velocity -- RC Reinforced Concrete -- SRSS Square Root Sum of Squares -- ULS Ultimate Limit State -- 2D two dimensional -- 3F-CW 3 Floors buildings-Cantilever Wall structural typology -- 3F-MRF 3 Floors buildings-Moment Resisting Frame structural typology -- 6F-CW 6 Floors buildings-Cantilever Wall structural typology -- 6F-MR 6 Floors buildings-Moment Resisting Frame structural typology -- 10F-CW 10 Floors buildings-Cantilever Wall structural typology -- 10F-MRF 10 Floors buildings-Moment Resisting Frame structural typology; 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.2019.110081
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Seismic assessment of elements with high economic, cultural or strategic value. Extensive Parametric study of FRS by linear and non-linear modeling of RC buildings. Numerical Floor Response Spectra versus the most used Standard's formulations. Peak Floor Acceleration and Peak Floor Velocity profiles along the building height. Stability charts to assess seismic safety of free standing objects at upper floors. Abstract: The seismic performances of non-structural (NS) components belonging to the category of "valuable elements", i.e. elements characterized by high value in terms of economic, cultural or strategic purposes, represent nowadays a crucial aspect in seismic safety design and assessment of new and existing buildings. Actually, most valuable NS elements are simply-supported objects, which can be classified as acceleration-sensitive NS elements. Frequently, these elements can be considered dynamically uncoupled from the primary structure to which they are connected, thereby justifying the Floor Response Spectrum methods usually adopted in literature and by most of building codes. This paper presents an extensive parametric study of floor response spectra obtained by linear and nonlinear numerical modeling of RC structures. Two sets of 30 horizontal ground motion scaled acceleration records are generated according to the Ultimate Limit State (ULS) and the Damage Limitation State (DLS) spectra adopted for building design. The numerical floor response spectra and those proposed by codes and international standards are critically compared, and the Peak Floor Acceleration ( PFA ) and the Peak Floor Velocity ( PFV ) profiles along the building height are discussed. Finally, a simplified method based on the "stability charts" is developed to assess the seismic safety of free standing NS elements located at the upper floors of the host buildings.