Seismic Reduction Analysis Of Irregular Structure Based On Hollow Floor Energy Dissipation System

With the development of the theory of structural vibration control,more and more vibration control apparatus is applied to the actual project,especially some new passive control-oriented damping system.compared to the traditional means by increasing the structure stiffness and mass to resist earthquake,the passive control not only has a relatively complete system of theoretical knowledge,but also because of its good control effect has always been a favorite of engineers.Accordingly,this article discussed the Tuned Rotary Mass Damper(TRMD),a new type of passive control device which mounted in hollow floor.The damping system effectively utilizes the empty room of cavity floor,so let the TRMD work with cavity floor.TRMD internal structure is extremely simple,consisting of a spherical vibrator and arc-shaped slide,its damping principle is: the main structure when subjected to seismic excitation effect,it will produce intense vibration,which led to the vibrator in the cavity floor vibration,by vibration of the vibrator to dissipate seismic energy.TRMD also has flexible layout,easy to implement and easy to maintain,and many other advantages.Through the Lagrange equation abtain the motion equation of single translational torsional coupling structure in the set at TRMD.Under the action of earthquakes have occurred in the history,then using numerical software contrast analysis get the aseismic capacity of the TRMD energy dissipation system,and the results show that: different excitations respectively acting on the translational torsion coupling structure with and without TRMD,discovery that the TRMD both for the direction of translational or torsion displacement response have received a good inhibition;At the same time,through the comparative analysis of the effect of different external excitations,obtain different damping effect of TRMD.Due to the different external seismic excitation,TRMD have different damping effect.Thus,it is necessary for the TRMD system to comparative analysis under random dynamic,this paper through the method of Monte Carlo model under white noise excitation to comparative analysis the with and without TRMD translational torsional coupling structure.Through numerical calculate results show that: TRMD-dissipation system effectively reduce structural translational and torsional direction static response displacement standard deviation have different degrees of inhibition,And to reduce the steady displacement variance of the translational direction has a better effect,make the structure rapidly arrive stable response state.In order to obtain the optimal damping effect,considering the influence of every parameter in the system,due to the influence of structure parameters is very small,before the optimal values of the structural parameters are given in.so we consider pure twisted structure is provided TRMD-dissipation system,and to optimize the TRMD parameters design.We obtain the optimal design TRMD-dissipation system parameters by equivalent linearization principle,and use point theory.The numerical results show: after comparing analysis results,the optimized TRMD parameters have more pronounced damping effect.