Study On Mechanical Property And Optimization Of Mild Steel Damper

In the 1970 s, engineers invented a new seismic design of buildings after introducing the concept of vibration control into construction field. The new method is energy dissipation. Engineers make use of dampers as non-load-bearing elements to dissipate energy by the deformation of the dampers. Code for seismic design of buildings divides dampers into two categories that are displacement-correlated dampers and velocity-depended dampers. This article studies mild steel damper which belongs to displacement-correlated dampers. Mild steel damper has many advantages. Mild steel damper does well in low cycle fatigue and hysteretic curve. Mild steel damper is not influenced by environmental temperature. Mild steel damper is convenient to install and replace.This article uses the finite element software ABAQUS to make models which is according to the material properties, mechanical properties of the mild steel damper. Then this article gets the simulation results that are hysteresis curve and stress nephogram. This article calculates energy consumption index that are equivelant viscous damping coefficient and energy dissipation coefficient according to hysteresis curve. This article observes stress concentration phenomenon and bearing capacity from the stress nephogram.This article developes two kinds of mild steel dampers that are diamond shaped mild steel damper and multiple circular holes mild steel damper. The two kinds of dampers have similar design steps. The optimizated design of shape is the key point because the appearance of damper has significant influence on the energy consumption. This article does a detailed optimization to get accurate circular hole size after ensuring the appearance of damper.