Metal Rubber Damper Hysteresis And Passive Dissipation Structural Model Experimental Research

Based on the Metal Rubber(MR) material's excellent damping characteristics,a kind of plate MR shear friction damper sample piece was developed, with the hope of applying MR in the field of structure vibration control of civil engineering. Some factors of effecting the damper's hysteresis characteristics were investigated through the damper dynamic performance experiments, and two kind of damper modified dynamic mechanical models were proposed according to the test results. Using the modified dynamic mechanics models, damper numerical simulation was completed, and a engineering formula of restoring force-displacement relationship of the damper was proposed. Furthermore, a general structural vibration control Bench Scale shaking-table test was designed, and MR material's excellent performance of passive dissipation was verified.The main contents of this dissertation are listed as follows: Firstly, the paper summarized the MR static and dynamic constitutive modeling all over the world, and the applicable scope of all the methods was determined through comparison.Secondly, a kind of plate MR shear friction damper was developed, and the damper dynamic performance tests under different working conditions were carried out. Factors affecting the hysteresis characteristics including external load characteris- tics and MR material parameters were investigated. In addition, design optimization parameters of this damper were proposed based on the analysis of the data of various experiment work conditions..Thirdly, according to the analysis results of the aforementioned damper tests, the existing modeling methods of dynamic mechanics were modified. Using the modified dynamic mechanics model, damper numerical simulation was processed. By comparing the numerical simulation curves with the test curves, applicability of the modified dynamic mechanics models was verified. Based on a large amount of numerical simulation data, a universal formula of restoring force-displacement relationship of the damper was put forward for the optimal damper passive dissipation effect model. What's more, the validity of the formula was proved though comparing the numerical simulation values and the experiment values.Finally, general Bench Scale shaking-table tests which widely applicated in the field of civil engineering of structural vibration control was designed. The response of frame structure model with MR damper installation undergoing sine and earthquake excitation was researched. The time history curves of relevant quantities of the frame structure model under control work condition and uncontrol work condition were compared. MR material's excellent performance of passive dissipation was verified though the experiment results time-domain analysis.