Experimental Study And Numerical Analysis Of Steel Plate Friction Damper

Because of its strong energy dissipation capacity,friction energy dissipation damper is less affected by structural load and its frequency,and it is simple in structure,easy to draw material and low in cost.It is not only suitable for new buildings,but also suitable for engineering structure reinforcement.The steel friction energy dissipation damper has important research value and wide application prospect for the node energy dissipation and supporting reinforcement of the fabricated steel structure in the great environment of the national assembly steel structure development.According to the principle of friction dampers designed 5 sets of plate friction damper and method of steel plate respectively by bolts preload applying positive pressure,the friction between the low cyclic loading test of steel plate with 5 different friction plate material,friction plate materials and influence of bolt pretightening force on the deformation and friction damper the components of friction parameters,hysteresis curves,energy dissipation performance.Using ABAQUS finite element analysis software,according to the designed damper size 1:1,the ideal elastic-plastic analysis model is established to carry on the numerical simulation analysis.The results show: The loading force of the main sliding plate of the damper is the largest,but the deformation is in the elastic deformation stage during the test.The hysteretic curves of dampers with different friction materials are close to “ideal rectangle”,but the hysteretic stability and energy dissipation capacity are different.With the increase of pretension force of high strength bolts,the friction mechanism of steel aluminum and steel brass changes from pure friction type to mechanical occlusal friction type,and the sliding friction force and energy dissipation capacity are improved.The hysteretic curve of the ideal elastoplastic model established by ABAQUS is a “rectangular shape”,which fully conforms to the restoring force model established under the ideal elastoplastic condition.