Seismic behavior analysis of new self-centering prefabricated dual energy dissipation frames with metallic staged-yielding dampers

IF 4.3 2区 工程技术 Q1 ENGINEERING, CIVIL
Fangfang Geng , Youliang Ding , YuChen Zhuang
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引用次数: 0

Abstract

The new design dual energy dissipation self-centering prefabricated concrete (DED-SCPC) framework joint with the metallic staged-yielding dampers (MYDs) is proposed, and the specific fabrication and mechanics principle of the new joint are elaborated. The theoretical hysteresis behavior of the DED-SCPC joint reflects a new flag-shaped hysteresis curve with “two-inflection points and three-stiffness”. The refined numerical model of the DED-SCPC joint in ABAQUS and OpenSees are established and the quasi-static numerical analysis of the joint are performed, respectively. The hysteretic simulation results have verified the better seismic resilience of the new joint and accuracy of the OpenSees numerical model. The compressive and tension damage degree of the concrete, and the stress cloud map of MYDs are also analyzed. Subsequently, a four-span, six-story prefabricated DED-SCPC framework with the DED-SCPC joint is modeled by the OpenSees platform, and seismic fragility analysis based on the incremental dynamic analysis (IDA) is conducted. Three performance states are defined, including Immediate Occupancy (IO), Life Safety (LS), Collapse Prevention (CP). The results indicate that the DED-SCPC framework tends to reach the IO, and the failure probability also decreases accordingly at various seismic intensity. The DED-SCPC framework has the notable security ability and anti-collapse ability, corresponding to only 6 % and 0 % failure probability under the moderate earthquakes. Furthermore, the risk of collapse of the DED-SCPC framework is fairly low under major earthquakes.
金属级屈服阻尼器新型自定心预制双耗能框架抗震性能分析
提出了一种新型金属级屈服阻尼器双耗能自定心预制混凝土框架节点的设计方案,阐述了这种新型节点的具体制作方法和力学原理。d - scpc节点的理论迟滞行为反映了一种新的“双拐点、三刚度”旗形迟滞曲线。在ABAQUS和OpenSees中分别建立了d - scpc节点的精细化数值模型,并对该节点进行了准静态数值分析。滞回模拟结果验证了新节点具有较好的抗震性能和OpenSees数值模型的准确性。分析了混凝土的压、拉损伤程度和myd的应力云图。随后,利用OpenSees平台对带有d - scpc节点的四跨六层预制d - scpc框架进行建模,并进行基于增量动力分析(IDA)的地震易损性分析。定义了三种性能状态,包括即时占用(IO)、生命安全(LS)和防止崩溃(CP)。结果表明,在不同烈度下,d - scpc框架结构的破坏概率也相应降低。d - scpc框架具有显著的安全性能和抗倒塌能力,在中等地震作用下的破坏概率仅为6 %和0 %。此外,在大地震作用下,d - scpc框架的倒塌风险相当低。
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来源期刊
Structures
Structures Engineering-Architecture
CiteScore
5.70
自引率
17.10%
发文量
1187
期刊介绍: Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.
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