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Performance of a New Model of Rectangular Damper in Diagonal Concentric Brace
Iranian Journal of Science and Technology, Transactions of Civil Engineering ( IF 1.7 ) Pub Date : 2021-03-27 , DOI: 10.1007/s40996-021-00624-9
Mohsen Yousefi , Yahya Nassira , Ali Ghamari

In this study, the performance of rectangular added damping and stiffness (RADAS) dampers has been introduced in the diagonal element site to avoid brace buckling and energy dissipation by dampers. The innovation of this research is in the type of site of steel plates and the way of connection in the vicinity of gusset plates which can be easily replaced. To investigate the cyclic performance of the ADAS damper, 15 numerical examples have been simulated by ABAQUS software. The study of cyclic behavior on the single-bay and single-floor steel frame has been done, and the sensitivity of cyclic behavior based on the thickness, length and ratio of dimension to the thickness has been studied. The studied thicknesses of the damper were 12, 21 and 30 mm, the studied lengths of the damper were 400, 500 and 600 mm, the studied geometry of the damper was rectangular, and the studied thicknesses of the brace were 12, 21 and 30 mm. The results of this study showed that this type of damper has good behavior in the energy dissipation of the frame and the total stiffness of the steel plates forming ADAS dampers must be less than the stiffness of the brace to show acceptable frame performance. By changing the damper length parameter from 600 to 500 and 400 mm, each of the indicators of stiffness, ultimate strength and energy has increased by a maximum of 144, 46 and 149%, by changing the damper thickness parameter from 12 to 21 and 30 mm, each of the mentioned indices has increased by a maximum of 147, 52 and 160%, and by changing the brace thickness parameter from 12 to 21 and 30 mm, each of the mentioned indices has increased by a maximum of 5, 7 and 9 percent. The values ​​of the damper thickness and length, when they are less stiff than the stiffness of the brace, cause the plastic hinge formation to be made on the damper, and the damper performance is optimized.



中文翻译:

对角线同心支撑中新型矩形阻尼器的性能

在这项研究中,已在对角单元位置引入了矩形附加阻尼和刚度(RADAS)阻尼器的性能,以避免支撑杆屈曲和阻尼器的能量耗散。这项研究的创新之处在于钢板的部位类型和角撑板附近的连接方式,这些位置可以轻松更换。为了研究ADAS阻尼器的循环性能,ABAQUS软件模拟了15个数值示例。对单槽单层钢框架的循环行为进行了研究,并研究了基于厚度,长度和尺寸与厚度之比的循环行为的敏感性。阻尼器的研究厚度为12、21和30 mm,阻尼器的研究长度为400、500和600 mm,研究的减振器几何形状为矩形,研究的支架厚度为12、21和30 mm。这项研究的结果表明,这种类型的减震器在框架的能量耗散方面具有良好的性能,形成ADAS减震器的钢板的总刚度必须小于支架的刚度才能显示出可接受的框架性能。通过将阻尼器长度参数从600更改为500和400 mm,通过将阻尼器厚度参数从12更改为21和30,每个刚度,极限强度和能量指标最多增加了144%,46%和149%。毫米,每个提到的指标最多增加了147%,52%和160%,并且通过将支撑厚度参数从12毫米更改为21毫米和30毫米,每个提到的指标最多增加了5%,7个和9%。

更新日期:2021-03-27
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