The Behaviiur of Flush Endplate Connectiins in Fire

摘要

This paper presents a new vibration control system for protection of steel structures from earthquakes. The pro posed system, which uses a quasi-linear motion mechanism,achieves dissipation of seismic energy into the structure through yielding of U-shaped steel dampers. Consequently, bracing members are subjected only to tensile force. This feature can eliminate the brace-buckling problem. Stiffness evaluation is conducted for the steel frame using the pro posed devices. Furthermore,a plastic collapse load of the clamper system is evaluated using the upper bound theorem considering the U-shaped damper collapse mechanism with three plastic hinges. The accuracy of the evaluation is ex amined by comparing the cyclic loading test results.