Comparison among design solutions for precast buildings in medium-to-moderate seismicity zones
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Document typeConference report
PublisherWorld Conference on Earthquake Engineering
Rights accessRestricted access - publisher's policy
This paper compares, mainly in terms of construction cost and rapidity, two seismic-resisting systems for low-to-midrise precast buildings in moderate-to-medium seismicity zones (in Spain): (i) ordinary buildings accounting for the cooperation of infill and cladding walls, and (ii) use of additional dampers. Precast buildings are popular in Spain (even in seismic zones) mainly because of their construction rapidity despite they are costlier than cast-in-situ buildings. Conversely, they are not suitable for seismic resistance (high self-weight, low lateral strength and stiffness, low ductility, not monolithic, and low inherent damping). Nowadays, the current Spanish code apparently endorses the lack of seismic consideration in ordinary importance precast buildings not exceeding seven stories and located in low seismicity zones. However, neither the European regulation nor the forthcoming new Spanish code contain any such prescription; therefore, the new situation might generate misunderstandings and conflicts. This underlines the opportunity of this study; it consists of 4 rather consecutive stages: - Selection of 3 prototype buildings. Building # 1 is a 3-story school building, # 2 is a 2-story fire-station building, and # 3 is a single-story industrial building. - Analysis of energy dissipators for precast buildings. Hysteretic devices are preferred because of their reliability, simplicity, robustness, and low maintenance requirements. - Formulation of energy-based design criteria. Precast buildings with masonry walls or concentric steel bracing can be code-type designed; conversely, more tailored formulations are needed for buildings with additional dampers. Design energy spectra derived after Spanish records will be mainly used. - Parametric study. This study consists essentially in designing buildings equipped with the aforementioned protection systems, under varying situations. The parameters of the study are the PGA (0.04 g, 0.12 g, 0.24 g), the soil type (B and D, according to the European classification), and (ii) the seismic system (ordinary buildings, additional dampers). The performance indices are the construction cost and rapidity.
CitationEskubi, J.; Lopez Almansa, F. Comparison among design solutions for precast buildings in medium-to-moderate seismicity zones. A: World Conference on Earthquake Engineering. "17th World Conference on Earthquake Engineering, 17WCEE, Sendai, Japan, September 13th to 18th 2020". World Conference on Earthquake Engineering, 2021, p. 1-12.
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