新型蜂窝形软钢阻尼器的滞回分析及性能设计

Hysteresis analysis and performance design of a new honeycomb-shaped soft steel damper

设计一种构造简单、耗能性优异、塑性变形稳定、塑性区域分布均匀的钢阻尼器有利于消能减震工程的普遍应用。通过分析框架结构在水平荷载作用下的应力应变情况,提出了利用正六边形钢并在其中心开圆形洞口的方式组合成具有四个屈服区域的钢阻尼器,利用ABAQUS数值模拟并绘制滞回曲线。结果表明,该阻尼器具有初始刚度大、初始屈服位移小、滞回曲线饱满、塑性区分布均匀、塑性变形稳定等特性。其中,四个屈服区域整体形成的矩形角点与框架梁柱结构相对应,为剪切型钢阻尼器的设计和优化提供了新的思路。

The design of a steel damper with simple construction, excellent energy dissipation, stable plastic deformation, and uniform distribution of plastic regions is beneficial to the universal application of energy dissipation and vibration reduction engineering. By analyzing the stress-strain situation of the frame structure under horizontal load, a steel damper with four yield regions is proposed by using a hexagonal steel with a circular hole in its center, and the hysteresis curves are plotted using ABAQUS numerical simulation. The results show that the damper has the characteristics of large initial stiffness, small initial yield displacement, full hysteresis curve, uniform distribution of plastic zone, and stable plastic deformation. Among them, the rectangular corner points formed by the four yield regions as a whole correspond to the frame beam-column structure, which provides a new idea for the design and optimization of shear steel dampers.