滚轴式金属屈服耗能阻尼器数值模拟研究

发布时间：2018-10-11 14:17

【摘要】：桥梁用阻尼器通常吨位和变形需求巨大,普通金属屈服耗能阻尼器难以满足其性能要求。为此该文提出一种新型的滚轴式金属屈服耗能阻尼器,并对其进行数值模拟研究。该阻尼器由一块平直耗能钢板及一组可转动辊轴组成,耗能钢板在辊轴之间穿过,受辊轴挤压产生塑性变形,从而耗散地震能量。该文采用在大型通用有限元软件ABAQUS建立了滚轴阻尼器的模型,通过该模型研究了辊轴个数以及辊轴间隙对阻尼器耗能性能的影响。分析结果表明:该阻尼器耗能性能受辊轴间隙和辊轴个数控制,通过合理的设计可以保证滚轴式金属屈服耗能阻尼器具备优良的变形能力和耗能能力。该文还提出了该阻尼器的恢复力计算公式,结合有限元仿真结果对计算公式进行了修正。
[Abstract]:Bridge dampers usually require a large amount of tonnage and deformation, and ordinary metal yield dampers are difficult to meet their performance requirements. In this paper, a new type of roller metal yield damper is proposed and studied numerically. The damper consists of a straight energy dissipation steel plate and a group of rotatable roller shafts. The energy dissipation plate passes through the rollers and is extruded by the roller shaft to produce plastic deformation, thus dissipating seismic energy. In this paper, the model of roller damper is established by using the general finite element software ABAQUS. The effects of the number of roller shafts and the clearance of roller shaft on the energy dissipation performance of the damper are studied. The results show that the energy dissipation performance of the damper is controlled by the clearance of the roller shaft and the number of the rollers, and the excellent deformation and energy dissipation ability of the rolling metal yield damper can be guaranteed by reasonable design. The formula for calculating the restoring force of the damper is also presented in this paper, and the formula is modified with the result of finite element simulation.
【作者单位】：土木工程安全与耐久教育部重点试验室清华大学;北京羿射旭科技有限公司;
【基金】：国家自然科学基金项目(51178250,51261120377) 清华大学自主科研项目(2010Z01001)
【分类号】：TU391

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