带缝钢板阻尼器受力性能试验研究

发布时间：2018-06-19 21:33

本文选题：带缝钢板阻尼器 + 延性系数　；参考：《土木工程学报》2015年09期

【摘要】：对4组弯曲单元宽厚比小于5的带缝钢板阻尼器进行了低周往复拟静力试验,研究其力学特性和耗能能力,利用试验结果检验了现有阻尼器的刚度和强度设计公式。建立有限元模型模拟阻尼器破坏的全过程,通过参数分析研究了带缝钢板阻尼器的延性系数、损伤发展机制、超强系数及累积耗能和累积塑性变形。研究表明:带缝钢板阻尼器具有稳定的平面内力学性能、低周疲劳性能和较强的耗能能力,等效黏滞阻尼系数约为0.5;阻尼器延性较好,当弯曲单元高宽比α不小于4时,延性系数受其影响较小,因此不应采用α小于4的阻尼器;带缝钢板阻尼器的超强系数在2.30~2.96之间;累积塑性变形角与α成正比、标准累积塑性耗能率与α成反比,提出的公式可用于指导消能减震结构设计和阻尼器选型。
[Abstract]:The low cycle reciprocating pseudostatic test of four groups of steel plate dampers with width to thickness ratio of less than 5 was carried out. The mechanical properties and energy dissipation capacity of the dampers were studied. The stiffness and strength design formulas of the existing dampers were tested by the test results. The finite element model was established to simulate the whole process of dampers failure. The ductility coefficient, damage development mechanism, superstrength coefficient, cumulative energy dissipation and cumulative plastic deformation of the dampers were studied by parameter analysis. The results show that the dampers have stable in-plane mechanical properties, low cycle fatigue performance and strong energy dissipation capacity, and the equivalent viscous damping coefficient is about 0.5, and the ductility of the dampers is better, when the aspect ratio 伪 of bending elements is not less than 4, The ductility coefficient is less affected by it, so the damper with 伪 less than 4 should not be used; the superstrength coefficient of steel plate damper with slit is between 2.30 and 2.96; the cumulative plastic deformation angle is proportional to 伪, and the standard cumulative plastic energy dissipation rate is inversely proportional to 伪. The proposed formula can be used to guide the design of energy dissipation structures and the selection of dampers.
【作者单位】：中国地震局工程力学研究所;中国地震局地震工程与工程振动部门重点实验室;
【基金】：国家国际科技合作专项(2014DFA70950) 中央级公益性研究所基本科研业务费专项(2013A01)
【分类号】：TU352.1

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