Damping Effect Analysis Of SMA Damper On Frame Structure

Along with the development of the modern building energy dissipation damping measures,people have developed different dampers for vibration energy dissipation structures.This paper mainly introduces the damper made of shape memory alloy,which is a kind of smart material.As the shape memory alloy itself has super elasticity,high damping and shape memory effect,it can effectively provide additional damping to the structure and absorbe most of the energy of an structure produced by an earthquake.It has gradually become a new seismic method with wide application prospect.Based on the research and application of the shape memory alloy damper at home and abroad,this paper mainly discusses the restoring force model and the basic structure of the damper.Using finite element analysis software ANSYS,two finite element models should be established.One is a model of five story reinforced concrete frame structure,and the other is a model of the dampers installed on the model above.Modal analysis is carried out on the two models to obtain the main frequencies and modes of the vibration.After edge structure of the two principal directions of the input earthquake wave,numerical simulation of frame structure is carried out under seismic load dynamic history response.After that,the layout of the damper is optimized,the position and number of the dampers are adjusted to achieve the goal of economic efficiency.The results show that the shape memory alloy damper can effectively control the deformation and displacement of the structure in earthquake,and achieve the purpose of energy dissipation.