Semiactive Tuned Liquid Column Dampers: Experimental Study

摘要: A tuned liquid column damper ~TLCD! is a special type of auxiliary damping device which relies on the inertia in U-tube to counteract forces acting structure. Damping TLCD introduced as result headloss experienced by moving through an orifice. The primary objective this paper was examine performance prototype semiactive TLCD. Experiments were conducted determine dynamic characteristics coupled structure-TLCD system. experimental setup included attached model single-degree-of-freedom structure mounted shaking table. equipped with electropneumatic valve provide optimal at wide range structural motion amplitudes. optimum absorber parameters, i.e., tuning ratio and ratio, determined experimentally compared analytical results obtained previously reported writers. control strategy based gain scheduling utilized, designed maintain prescribed look-up This scheme validated. It noted that system provided additional 15-25% reduction response over passive Finally, design example presented demonstrate application TLCDs tall buildings under wind loads. uncontrolled structure, braced damper, using numerical simulations compared. reduced RMS acceleration building top 45% all speeds.