Civil Engineering Association

Estimation of fundamental periods of shear-wall dominant building structures

Shear-wall dominant multistorey reinforced concrete structures, constructed by using a special tunnel
form technique are commonly built in countries facing a substantial seismic risk, such as Chile, Japan,
Italy and Turkey. In spite of their high resistance to earthquake excitations, current seismic code provisions
including the Uniform Building Code (International Conference of Building Ocials, Whittier,
CA, 1997) and the Turkish Seismic Code (Specication for Structures to be Built in Disaster Areas,
Ankara, Turkey, 1998) present limited information for their design criteria. In this study, consistency
of equations in those seismic codes related to their dynamic properties are investigated and it is observed
that the given empirical equations for prediction of fundamental periods of this specic type of
structures yield inaccurate results. For that reason, a total of 80 dierent building congurations were
analysed by using three-dimensional nite-element modelling and a set of new empirical equations was
proposed. The results of the analyses demonstrate that given formulas including new parameters provide
accurate predictions for the broad range of dierent architectural congurations, roof heights and
shear-wall distributions, and may be used as an ecient tool for the implicit design of these structures.

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