SEISMIC DESIGN OF STRUCTURE WITH IMPROVED TOGGLE-BRACE-DAMPER SYSTEM

摘要

Seismic design of structure with enhanced togglebrace-damper (TBD) installation configuration with the damper directly connected to the beam-column joint is investigated in this paper. For practical application, a simplified procedure for design and analysis of building incorporating TBD system is proposed based on Chinese design response spectrum, in which the damping coefficients of the dampers that are proportional to the relative modal displacements in the corresponding stories are distributed over the height of a structure to satisfy the given performance objective. The validity of this method is verified by nonlinear response history analysis (RHA). The study shows that this improved damper installation configuration not only decreases significantly floor displacement response but also reduces story shear demands when compared with the conventional installation configurations of TBD and diagonal brace-damper.