Shear-type damper using a low-yield-strength circular hollow section

Abstract

<p>The present study investigates the mechanical behavior of a shear-type damper using a low-yield- strength circular hollow section (LYCHSD). When using a LYCHSD as a seismic energy absorbing device, the hysteresis characteristics and deformation capacity of the LYCHSD should be evaluated accurately. Thus, monotonic and cyclic loading tests were carried out on a LYCHSD, taking the aspect ratio and diameter as variable parameters. The test results were used to establish a method of calculating the full plastic shear strength and initial stiffness. In addition, it was found that the deformation capacity was inversely proportional to the aspect ratio and diameter. The monotonic loading test was also simulated using the finite element method (FEM) in order to verify the experimental results, and to evaluate the local strain around the weld toe due to the crack.</p>