【摘要】 通过建立有限元模型,对薄壁型U形金属阻尼器在水平荷载作用下的内力与变形进行了计算,并结合不同厚度U形阻尼器的力-位移曲线的特征,对阻尼器的内力分布与屈服过程进行分析,通过对比屈服前后的刚度,研究了U形金属阻尼器的刚度随其厚度及宽度的变化规律。结果表明,U形金属阻尼器的屈服开始于压弯段,屈服后其刚度退化较大;屈服前后阻尼器刚度均随厚度的增加而增加,且当厚度大于6 mm时,增加速度加快;当阻尼器厚度一定时,各刚度均随宽度增加而线性增加,刚度增加速度屈服前略快于屈服后。因此,在结构振动控制设计时应用薄壁U形金属阻尼器可根据刚度要求设置合理的厚度及宽度。更多还原

【Abstract】 The internal force and deformation of the thin U-shape metal damper under horizontal load are calculated through the establishment of finite element model.Then the distribution of internal force and the yield course of the stiffness of the damper are analyzed in combining with the characters of curve of internal force and displacement of the U-shape dampers with different thickness.By contrast of stiffness before and after the yields,the stiffness transformation of U-shape metal damper in different thickness and width are studied.The research results indicate that the commencement of the yield of U-shape metal damper is at the zone of compress and bent and that after yield the stiffness degrades much,and the stiffness of damper before and after the yields increases with an increase in its thickness.When the thickness exceeds over 6 mm,the rate of enhance of stiffness is accelerated.When the thickness of damper is fixed,each stiffness increases linearly with an increase in width.The stiffness increasing rate prior to the yield is slightly faster than the stiffness posterior to the yield.Accordingly,when the structure vibration control is designed,the use of thin U-shape metal damper can be based on the rational thickness and width setting requirement by the stiffness.更多还原