The Formulation of Risk-Targeted Behaviour Factor and Its Application To Reinforced Concrete Buildings


Abstract eng:
The derivation of risk-targeted behaviour factor which can be used for the force-based design of structures is presented. The risk-targeted behaviour factor is formulated as a product of the conventional reduction factor and two factors which account for the return period of design seismic action, the target collapse risk and the difference between the shape of acceleration spectra from the demand and capacity domain. Consequently, the behaviour factor is expressed as a function of the target collapse risk, the parameter of seismic hazard, the uncertainty of the seismic response, the ability of the structure to deform in the collapse range and the overstrength factor. The aim of the proposed definition of the behaviour factor is to explain why it is necessary that the behaviour factor be smaller than that estimated from pushover analysis using conventional definition of the behaviour factor. Therefore the proposed definition of the behaviour factor makes it possible to explain the “empirical component” of the values of behaviour factors defined in Eurocode 8. The proposed approach for estimation of the behaviour factor for the force-based design is demonstrated by means of an example of an 8-storey reinforced concrete building. It is hoped that the definition of a risk-targeted behaviour factor may help engineering practitioners and scholars to better understand the origin of the value of behaviour factor and the target response of the structures.

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 1659.:
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