当前位置: X-MOL 学术Struct. Des. Tall Spec. Build. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Experimental study on a novel replaceable yielding‐based energy dissipater for rocking and seesaw buildings
The Structural Design of Tall and Special Buildings ( IF 1.8 ) Pub Date : 2020-08-16 , DOI: 10.1002/tal.1795
Soroush Kherad 1 , Mahmood Hosseini 2 , Mehrtash Motamedi 3
Affiliation  

The use of energy dissipaters for creation of earthquake‐resilient buildings has been paid more and more attention in recent years, and some newly developed structural fuses or dampers have been proposed to be employed in rocking and seesaw buildings. In this study, a new type of yielding‐based dampers, called curved‐yielding‐plates energy dissipater (CYPED), is introduced. CYPEDs are installed at the bottom of rocking or seesaw building's circumferential columns at the lowest story and have hysteretic behavior in their deformation occurring in vertical direction. The initial curvature of the yielding plates prevents them from buckling and gives the device a smooth force–deformation behavior. First, by performing a set of cyclic tests on three specimens of CYPED, their hysteretic force–displacement behavior was investigated. Then, to show the efficiency of this energy dissipating device in reducing the seismic response of buildings, they were employed numerically as multilinear plastic springs in the computer models of a sample seesaw steel building, and a series of nonlinear time history analysis (NLTHA) were performed on both seesaw building and its conventional counterpart. Results of NLTHA show that the proposed seesaw structural system equipped with appropriate CYPEDs not only gives the building a longer natural period, leading to lower seismic demand, but also leads to remarkable energy dissipation capacity in the building structure at base level and, therefore, keeping the seismic drifts in elastic range in all stories of the building. In this way, the building structure does not need any major repair work, even after a large earthquake, while the conventional building suffers from heavy damage and is not usable after the earthquake.

中文翻译:

新型摇摆式和跷跷板建筑物可替代的基于屈服的耗能器的实验研究

近年来,越来越多的人将消能器用于建造抗震建筑物,并提出了一些新开发的结构熔断器或阻尼器用于摇摆和跷跷板建筑物。在这项研究中,介绍了一种新型的基于屈服的阻尼器,称为弯曲屈服板能量耗散器(CYPED)。CYPED安装在最低层的摇摆物或跷跷板建筑物的圆周柱的底部,并且在垂直方向发生变形时具有滞后行为。屈服板的初始曲率可防止其屈曲,并使设备具有平稳的力-变形性能。首先,通过对CYPED的三个样本进行一组循环测试,研究了它们的滞后力-位移行为。然后,为了展示这种消能装置降低建筑物地震响应的效率,在示例跷跷板钢结构计算机模型中将它们作为多线性塑性弹簧进行了数值模拟,并在其上进行了一系列非线性时程分析(NLTHA)。既是跷跷板建筑,又是传统的跷跷板建筑。NLTHA的结果表明,建议的跷跷板结构系统配备了适当的CYPED,不仅使建筑物具有更长的自然周期,从而降低了地震需求,而且还导致了建筑结构在基层的显着耗能能力,因此可以保持建筑物所有楼层的地震在弹性范围内漂移。这样,即使发生大地震,建筑结构也不需要任何大修工作,
更新日期:2020-08-16
down
wechat
bug