Fundamental period formulae for RC staggered wall buildings

The objective of this work was to derive empirical formulae for the fundamental natural period of reinforced concrete staggered wall system structures using modal analysis results. To this end, 32 model structures of varying height and span length were designed and their fundamental natural periods were computed by modal analysis. The proposed formulae for the natural period of staggered wall structures with and without a middle corridor were determined from regression analysis. To validate the proposed formulae, the seismic performance of selected model structures designed using the formulae was investigated. According to the regression analysis, the computed best-fit formulae for the model structures represent the natural periods precisely. The structures designed using the proposed formulae showed satisfactory performance against the design seismic load.