EXPERIMENTAL EVALUATION OF DAMAGE PROCESS AND ULTIMATE FAILURE MODE OF LARGE-SCALE SHEAR LINKS HYSTERETIC ENERGY DISSIPATERS OF STEEL COLUMN INTEGRATED BY MULTIPLE STEEL PIPES

Abstract

 The innovative steel column integrated by multiple steel pipes with shear link dissipaters was proposed based on damage control design during earthquake. An experimental study was conducted on four types of shear links, each utilizing different connection methods as well as welding joints, bearing-type connection and friction joints. The main objectives of the large-scale experiments were to apply cyclic plastic deformations and evaluate damage process and ultimate failure mode of the shear link components. Experiments of specimens utilizing welding joints and bearing-type connection resulted in ductile hysteretic behavior showing suitability as shear link dissipaters. In the link where friction joints were used, the failure mode initiated with cracks in the web at the splice region of friction joints and propagated along bolt holes of friction joins leading to progressive tearing and failure. The ultimate failure mode was found to significantly vary among all of the specimens, with different connection methods.