| Passive energy dissipation damping components can control the structure vibration very well, so it has been widely used in the design of structure seismic. As a type of the energy dissipation components, steel shear panel dampers make use of plastic deformation to dissipate energy. With respect to its construction size, this type dampers have fair enough energy dissipation capacity and with low price. But the dampers made of traditional mild steel have an obvious disadvantage, it is difficult to achieve plastic state under the small-earthquake and the effect of energy dissipation is unconspicous. To overcome this drawback, this paper has carried finite element simulation and test study on shear panel dampers made of domestic low yield strength steel, which mainly includes the following contents:(1) To obtain stress-strain relationship, Young modulus, yield strength and many other material parameters of domestic low yield point steel, quasi-statical stretching tests were conducted for LYP100, LYP160 and LYP225. The test results show that low yield point steel has very well plastic deformation capability. Depend on material parameters, choosing different hardening model to make simulation and the results show that combined hardening model has better simulation effect. The model can provide basis for subsequent simulation.(2) By the use of finite element analysis software Abaqus, this paper made many hysteretic behavior analysis on panel dampers with different structure form. According to hysteretic curves, skeleton curves and equivalent viscous damping coefficient, we can get the critical high thichness ratio of every type dampers and the effect of core-board material. It turned out that core-board material had almost no influence on non-stiffener dampers and had little affect on stiffened dampers.(3) Making use of Abaqus to analysis the hysteretic behavior of four new dampers which have friction stiffeners, and made contrast with the result of non-stiffener dampers. The results show that the four new dampers can promote dissipation capacity of dampers with different extent and the double derrick stiffener has the best effect.(4) Designing three non-stiffener shear panel dampers and taking experiment on the dampers under constant amplitude cyclic loading with different magnitude to investigate fatigue property of this type dampers. Making summary of hysteretic curves, equivalent viscous damping coefficient, peak horizontal force, strength degradation coefficient, stiffness degradation and energy dissipation curves results, we can conclude that no matter what the loading amplitude are, this type dampers perform fine fatigue behavior. When it comes to the state of fatigue damage, the dampers also have enough bearing and stiffness store. And the value of amplitude has little effect on the performance play of this dampers. According to Masson-Coffin formula, the paper initially construct the S-N curve of the tested dampers and the curve can provide basis for following study on fatigue behavior. |
