Numerical analysis of U-shaped hysterisis steel damper with energy absorber for seismic areas

Conference on Innovation in Technology and Engineering Science

工业技术（总论）

Satria, E.^1 ; Son, L.^1 ; Bur, M.^1 ; Akbar, M.D.^1 ; Haris, S.^2

Mechanical Engineering Department, Universitas Andalas Padang, Indonesia^1

Civil Engineering Department, Universitas Andalas Padang, Indonesia^2

关键词: Energy absorbers;    Hysteresis curve;    Large buildings;    Large displacements;    Non-linear finite elements;    Plastic displacement;    Restoring moments;    Slender columns;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/602/1/012078/pdf
DOI  :  10.1088/1757-899X/602/1/012078

学科分类：工业工程学

来源: IOP

【 摘 要 】

This paper investigates one type of metallic dampers used in many large buildings in seismic areas. The previous studies have shown a possibility of the introduced damper to act as a damper as well as energy absorber through yielding on some parts of the damper. However, the occurred yielding caused a plastic deformation after unloading. The study aims to substitute the previous critical area to another part which is considerably uncritical during loading. Therefore, an additional part in the form of a slender column is inserted into the damper. The bottom part of the column is clamped to the base plate of the damper. There is a restoring moment acting on the column which was able to restore a large displacement of the damper to at least a small residual plastic displacement after unloading. A stiffness, strength and energy dissipation of the modified damper is determined by a nonlinear finite element technique which involves both geometrically and materially nonlinearities. The model was subjected by a monotonic increasing load which is applied horizontally through the method of displacement control until one cycle of hysteresis is formed. The final result is in a term of comparison of hysteresis curves between a full model of hysteresis damper with and without a slender column.