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提出一种新型的具有抛物线外形的软钢阻尼器,该阻尼器具有全长截面同时屈服的特点,可充分发挥软钢的材料功效。根据力学相关理论,推导出了该阻尼器的外形设计公式。按公式设计了软钢阻尼器,对两组阻尼器进行了拟静力试验,试验结果表明:具有抛物线外形的软钢阻尼器能有效地避免应力集中,具有稳定的滞回性能和良好的塑性变形能力,是一种理想的耗能元件。最后,用有限元软件分析了加载过程中的应变分布及滞回性能,结果与理论和试验研究相一致,为进一步优化阻尼器参数提供了合理的有限元模型。
A new type of mild steel damper with a parabolic shape is proposed. The damper has the characteristics of full-length cross-section yielding at the same time, and can fully utilize the material efficacy of mild steel. Based on the theory of mechanics, the shape design of the damper is deduced. According to the formula, a mild steel damper is designed and the quasi-static tests are carried out on the two sets of dampers. The experimental results show that the mild steel damper with a parabolic shape can effectively avoid stress concentration, has stable hysteresis performance and has good plasticity Deformation capacity, is an ideal energy-consuming components. Finally, the finite element software was used to analyze the strain distribution and hysteretic behavior during loading. The results are in good agreement with the theoretical and experimental studies and provide a reasonable finite element model for further optimization of the damper parameters.