Simplified Design Seismic-Resistant Method for Low-Rise Light-Framed Shear Wall Buildings


Abstract eng:
In this research work a prescriptive methodology for preliminary design of light-frame shear wall buildings up to 6 floors against seismic loads is proposed. The research is based on the analysis of structural models of archetypes oriented to residential buildings with eccentricity controlled by a suitable selection of strength and stiffness with respect to the structural axes. Through pseudo 3-D analysis of structural models of archetypes, and by identifying their dynamic behavior it is possible to define simplified models that allow the realization of parametric studies in relatively short time, which makes it attractive to use fragility curves for making decisions regarding design parameters. In order to achieve optimal performance for various seismic records, structural axes of variable resistance in height were considered. The drift was selected as a principal response parameter of the models, which should not exceed certain values associated with several performance levels. In addition, the variation of resistance in height was established trying to achieve a uniform drift response of the structure. In this way, all resistant lines actively participate in the energy dissipation. A proportional resistance for each level was obtained with respect to the first level response, and therefore proportional to the weight of the building. An important result of this work is that it is possible to suggest a simple way to design the system with seismic design coefficients, as an alternative to using the R-factor that reduces the elastic spectrum. The proposed methodology also incorporates control over the relative displacements between stories. Each seismic coefficient has been analyzed to meet performance targets proposed for timber structures, a condition that is verified in this study using fragility curves.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 2496.:
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