Low-damage glulam structures represent a new approach to improve lateral stiffness and mitigate earthquake damage in glulam structures. This paper proposed an innovative low-damage glulam frame (ILF) with energy-dissipating braces. The ILF was assembled by beam-column hinge connections with energy-dissipating braces and column-base connections with column shoes. Reversed cyclic loading tests were carried on a conventional low damage glulam frame (CLF) specimen and an ILF specimen at 1/2 scale. The hysteretic curves, energy dissipation capacity and stiffness degradation of the specimens were investigated and compared with conventional glulam frame (CF). The experiment illustrated that the lateral deformation of the ILF was significantly reduced and the ILF had a higher maintainability under reversed cyclic loading. Although the bearing capacity of ILF was slightly higher than CLF, it had about 20 % more lateral stiffness and about 150 % more energy dissipation capacity. A numerical model of low-damage frames with braces was developed in OpenSees, and the benefits of using the ILF in framed structures were proven. The numerical simulation showed that adopting the ILF could effectively reduce the residual drift and peak drift of structures during earthquakes.

中文翻译：

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带耗能支撑的低损伤胶合木框架的抗震性能：试验研究与数值模型


低损伤胶合木结构代表了一种提高胶合木结构横向刚度和减轻地震损伤的新方法。本文提出了一种带有能量耗能支撑的创新型低损伤胶合木框架 （ILF）。ILF 由带有耗能支架的梁柱铰链连接和带有柱靴的柱基连接组装而成。对传统的低损伤胶合木框架 （CLF） 试样和 1/2 比例的 ILF 试样进行反向循环加载试验。研究了试件的滞回曲线、耗能能力和刚度退化，并与常规胶合木框架 （CF） 进行了比较。实验表明，ILF 的横向变形显着减小，并且在反向循环载荷下具有更高的可维护性。虽然 ILF 的承载能力略高于 CLF，但它的横向刚度高出约 20%，能量耗散能力高出约 150%。在 OpenSees 中开发了带有支架的低损伤框架的数值模型，并证明了在框架结构中使用 ILF 的好处。数值模拟表明，采用 ILF 可以有效降低地震时结构的残余漂移和峰值漂移。