Fundamental period formulae for RC staggered wall buildings

Abstract

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.

Seismic Capacity Design and Retrofit of Reinforced Concrete Staggered Wall Structures

“…Mee et al (1975) investigated the structural performance of staggered wall systems by carrying out shaking table tests of 1/15 scaled models. Lee and Kim (2013) investigated the seismic performance of staggered wall structures with middle corridor; Kim and Baek (2013) conducted seismic risk assessment of staggered wall system structures; and Kim and Lee (2014) proposed a formula for fundamental natural period of staggered wall structures. Recently seismic behavior factors of the system were investigated based on the procedure recommended in the FEMA P 695 (2009) Kim 2013, 2015), and ATC 19 (1995) .…”