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为简化防屈曲支撑的加工工艺,提高防屈曲支撑的初始刚度和在小变形下的耗能能力,基于现有防屈曲支撑在截面形式与构造方式上的特点,提出了一种新型钢铅组合防屈曲支撑并进行了构造设计。通过有限元数值模拟,分析了钢铅组合防屈曲支撑的耗能特性与效果,建立了恢复力简化模型,并根据理想弹塑性材料本构关系推导出滞回规则。通过对不同设计参数的理论分析和数值模拟,分析了钢铅屈服力比、铅剪切面长宽比、核心段宽厚比和耗能段长度等参数对防屈曲支撑滞回性能的影响。研究结果表明,钢铅组合防屈曲支撑能够提供较大的抗侧刚度,耗能效果良好,加工工艺简单,适合工程应用。
In order to simplify the processing technology of anti-buckling brace and increase the initial stiffness of anti-buckling brace and its energy-dissipation ability under small deformation, a new type of steel-lead combination is proposed based on the characteristics of the existing buckling brace in section and structure Buckling support and structural design. Through the finite element numerical simulation, the energy dissipation characteristics and effects of the anti-buckling brace made of steel and lead were analyzed, and a simplified model of restoring force was established. The hysteretic rules were deduced according to the constitutive relation of the ideal elastoplastic material. Through the theoretical analysis and numerical simulation of different design parameters, the influence of the parameters such as yield strength ratio of lead, lead aspect ratio, core thickness ratio and energy dissipation length on hysteretic behavior of buckling brace is analyzed. The results show that the anti-buckling brace made of steel and lead can provide greater lateral rigidity, good energy dissipation effect, simple processing technology and is suitable for engineering application.