Abstract

In this paper, authors propose a novel type of light weighted steel buckling restrained brace (LWSBRB) made with two hollow rectangular sections used as restrainers, thus making the all-steel buckling restrained braces additionally light-weighted fulfilling the Euler’s buckling criteria as well. The proposed LWSBRB is cyclically tested and compared with conventional all-steel buckling restrained brace specimen for hysteretic behavior, failure pattern, energy dissipation capacity, cumulative plastic deformation, ductility, compression strength adjustment factor and equivalent viscous damping factor. The tested specimen is also numerically validated by non-linear finite element analysis. It was seen that LWBRB showed higher ductility with optimum energy dissipation. It was also observed that LWBRB induced quite stable hysteretic behavior with higher values of maximum compressive and tensile forces, and can be loaded beyond 2% axial strain to dissipate more energy.

中文翻译：

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轻型约束器全钢屈曲约束支撑的实验与数值研究

摘要

在本文中，作者提出了一种新型的轻质钢屈曲约束支撑（LWSBRB），该支撑由两个空心矩形截面用作限制器，从而使全钢屈曲约束支撑更加轻质，同时满足欧拉屈曲准则。所提出的 LWSBRB 进行了循环测试，并与传统的全钢屈曲约束支撑试件进行了滞后行为、失效模式、能量耗散能力、累积塑性变形、延展性、压缩强度调整因子和等效粘性阻尼因子的比较。测试样本还通过非线性有限元分析进行了数值验证。可以看出，LWBRB 显示出更高的延展性和最佳的能量耗散。还观察到，LWBRB 诱导了相当稳定的滞后行为，具有较高的最大压缩力和拉伸力值，并且可以加载超过 2% 的轴向应变以耗散更多能量。