轴向拉压波形钢板阻尼器的力学性能

    Mechanical Properties of the Axial Tension and Compression Corrugated Steel Plate Damper

    • 摘要: 为了解决某些实际工况下阻尼器应用范围受限的问题, 设计了一种轴向拉压波形钢板阻尼器, 以阻尼器长宽比和翼缘厚度为变量设计4个阻尼器试件, 通过拟静力试验和ABAQUS有限元分析对其力学性能进行研究. 试验结果表明: 4个阻尼器试件波形腹板基本处于纯剪的理想状态; 4个试件具有良好的延性和耗能能力, 滞回曲线稳定且饱满; 提高阻尼器的长宽比, 其耗能能力和延性会随之提高, 承载能力却随之降低; 增加翼缘厚度, 阻尼器承载力随之提高, 耗能能力差别不大. 利用ABAQUS软件建立9个阻尼器模型验证了模拟的可靠性并进行拓展因素分析. 模拟结果表明: 有限元分析与试验结果吻合程度良好; 阻尼器长宽比最好保证在0.5~0.9, 长宽比在此范围内增大时, 阻尼器的滞回性能随之增大; 当翼缘与波形腹板厚度比不小于2.4时, 提高翼缘板的厚度对阻尼器整体的耗能性能提升不大; 结合试验结果和ABAQUS有限元分析结果, 拟合得到轴向拉压型金属阻尼器的抗拉(压)承载力理论计算公式. 与试验结果对比发现, 理论计算公式有一定的适用性.

       

      Abstract: To solve the problem of the limited application range of the damper under certain actual working conditions, an axial tension compression corrugated steel plate damper were put forward for the first time, and four damper test pieces with the variable length ratio of the damper and the flange thickness as the variables were designed as parameters. The quasi-static test and ABAQUS finite element analysis were adopted to study its mechanical properties. The test results show that the waveform webs of the four dampers specimens are basically in the ideal state of pure shear, the four specimens have good ductility and energy dissipation capacity, and the hysteresis curve of them is stable and plump. When the ratio of the damper increased, the capacity and ductility increased at the same time, however, the load-bearing capacity was reduced. When the thickness of flange is increased, the load-bearing capacity of damper also increases. However, the energy consumption capacity differed slightly. Nine damper models were established by using ABAQUS software to verify the reliability of the simulation and analyze extended factors. The simulation results show that the finite element analysis is in good agreement with the test results, the aspect ratio of the damper is best ensured in the range of 0.5-0.9. Within this range, the increase of the aspect ratio causes a larger increase of the hysteretic performance of the damper. When the ratio of flange to corrugated web thickness was not less than 2.4, the increase of flange plate thickness had little effect on the overall energy consumption performance of the damper. Combining the test results and the ABAQUS finite element analysis results, the theoretical calculation formula for the tensile (compressive) bearing capacity of the axial tension and compression metal damper was obtained by fitting. Through comparison with the test results, it demonstrates that the theoretical calculation formula has certain applicability.

       

    /

    返回文章
    返回