RESEARCH ON CYCLIC WEB BUCKLING BEHAVIOR OF ENERGY DISSIPATION SHEAR LINKS

Specimen tests were conducted to study the cyclic web buckling behavior of energy dissipation shear links. Numerical models for the links were established and the influence of different parameters was analyzed and summarized. The results indicate that the axial displacement constraint had little influence on the cyclic web buckling. The axial forces also had little influence if the tension or compression was not significant. By a parametric analysis, it was confirmed that the web height-thickness ratio had most significant influence on the web buckling displacement angle. The web aspect ratio and the ratio of transverse stiffener spacing to web height also had significant influence, but the influence became slight after the ratio exceeded two. The equivalent link length coefficient and the steel hardening characteristic had little influence. A theoretical prediction approach for the cyclic web buckling displacement angle was proposed. The experimental and numerical validation confirmed that the approach is reliable.