DAMPING-COEFFICIENT AUTOMATIC ADJUSTING TYPE EARTHQUAKE DAMPING DEVICE

摘要

PURPOSE: To improve the safety and amenity of a building by a method wherein relative displacement between a cylinder and a piston for a variable damping device is amplified, a speed signal is differentiated and a pressure signal corresponding to acceleration working to a column-beam frame is obtained, an acceleration signal is integrated and the displacement of the column-beam frame is acquired and fed back to the variable damping device. ;CONSTITUTION: Displacement X₂ corresponding to the speed of a piston 3 for a hydraulic cylinder type damping device is obtained in a governor section A by rotating a pinion 20 for the hydraulic cylinder type damping device. Air pressure P₁ corresponding to acceleration (a) working to a column-beam frame is acquired by a differential operating section B by utilizing the displacement X₂. Displacement X₃ and the displacement X₄ of the column-beam frame are synthesized at a ratio, where an optimum damping coefficient is given, by a proportional operating section C continued to the differential operating section B by using the air pressure P₁. A valve-opening controller 28 is driven through a diaphragm valve 27 by a valve-opening controller operating section D, and oscillation frequency W_t is identified and controlled on the basis of formula W_t=|a/x|^1/2 from acceleration (a) and displacement (X) so that the hydraulic cylinder type damping device displays the optimum damping coefficient.;COPYRIGHT: (C)1997,JPO