ANALYSIS WITH MACRO-MODEL OVER THE SEISMIC TEST ON 12-STORY T-SHAPED COUPLED SHEAR WALLS AND INVESTIGATION ABOUT SHEAR FORCE OF COUPLED WALLS FOR DESIGN : The U.S.-Japan cooperative earthquake research program on composite and hybrid structures (HWS)

Abstract

Seismic test on 12-story T-shaped coupled shear walls has been conducted under the U.S.-Japan cooperative structural research project on composite and hybrid structures. The test results showed large differences between carrying shear forces on the tensile side and the compressive side in coupled shear walls through coupling beams. In this paper, we propose macro-modelling with multi-springs for coupled walls and coupling beams, and the results of the simulation for 12-story seismic test approximate to the test results roughly. Then, by estimating lateral expansions of coupled walls, the simulation results are in good agreement with the test ones. Moreover, we propose a simplified calculation method to estimate the shear forces of coupled walls for ultimate design, though usual design is conducted without considering the axial forces of coupling beams and the lateral expansions of coupled walls.