钢制双环阻尼器:循环性能的微观有限元建模和验证

IF 2.1 3区 工程技术 Q2 ENGINEERING, CIVIL
Mahdi Usefvand, Ali Mohammad Rousta, M. G. Azandariani, H. Abdolmaleki
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引用次数: 1

摘要

研究人员进行了广泛的研究,以增加同心支撑框架的延展性和能量吸收。增加延性和吸收能量的最广泛使用的策略之一是利用耗能系统。为此,提出了由不同结构细节的钢双环阻尼器(SDRD)组成的耗能系统,以改善钢双环阻尼器的滞回性能和性能。环内弯曲塑性铰的发展是造成结构耗能的最重要原因。因此,通过在SDR系统中增加内环,增加了弯矩塑性铰的数量,从而增加了耗能。采用非线性微有限元(MFE)程序对改进后的模型进行了参数化研究。参数化研究包括检验改进模型的厚度参数和内环直径的有效性。选择SRD模型作为比较和评价改进阻尼器效果的基础模型。然后对循环荷载和非线性静力方法下的MFE模型进行了分析。根据试验结果对MFE模型的结果进行了验证。结果表明,内环径厚比对结构的迟滞性能、延性、极限承载力和性能以及耗能有较大影响。此外,研究结果表明,内外环连接结构的细节对SDRDs的性能和迟滞行为有相当大的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Steel dual-ring dampers: Micro-finite element modelling and validation of cyclic behavior
Extensive studies have been performed by researchers to increase the ductility and energy-absorption of concentrically braced frames. One of the most widely used strategies for increasing ductility and energy-absorbing is the utilization of energy-dissipation systems. In this regard, the energy-dissipation system consisting of a steel dual-ring damper (SDRD) with different construction details is presented, to improve hysteresis behavior and performance of steel ring dampers (SRD). The most important cause of energy-dissipation in SRDs are the development of bending plastic hinges in the rings. Therefore, by adding an inner ring to the SDR system, it increases the number of moment plastic hinges and in turn increases energy dissipation. Parametric studies havse been performed applying the nonlinear micro-finite element (MFE) procedure to investigate the improved models. The parametric studies comprise examining the efficacy of thickness parameters and the inner ring diameters of the improved models. The SRD models was selected as the base model for comparing and evaluating the effects of improved dampers. MFE models were then analyzed under cyclic loading and nonlinear static methods. Confirmation of the results of the MFE models were performed against the test results. The results indicated that the diameter to the thickness ratio of inner ring of SDRDs has a considerable influence on determining the hysteresis behavior, ductility, ultimate capacity and performance, as well as energy dissipation. Also, the results show that the details of the construction of the internal and external ring connections were a considerable effect on the performance and hysteresis behavior of SDRDs.
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来源期刊
Smart Structures and Systems
Smart Structures and Systems 工程技术-工程:机械
CiteScore
6.50
自引率
8.60%
发文量
0
审稿时长
9 months
期刊介绍: An International Journal of Mechatronics, Sensors, Monitoring, Control, Diagnosis, and Management airns at providing a major publication channel for researchers in the general area of smart structures and systems. Typical subjects considered by the journal include: Sensors/Actuators(Materials/devices/ informatics/networking) Structural Health Monitoring and Control Diagnosis/Prognosis Life Cycle Engineering(planning/design/ maintenance/renewal) and related areas.
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