Quantification of energy-dissipating capacity for self-centering shear walls considering variable loading sequences

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering Pub Date : 2024-11-26 DOI:10.1016/j.soildyn.2024.109112

Ge Song

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引用次数: 0

Abstract

This study investigates and quantifies the energy-dissipating capacity of self-centering shear walls (SCSW) based on the degradation observed under variable loading sequences. 14 SCSWs with diverse structural features are designed and subjected to numerical simulations under cyclic loads with varying amplitudes and loading sequences. An exponential model is employed to evaluate the deterioration of energy-dissipating capacity in SCSWs, accounting for variations in loading sequences and structural features. This model is then utilized to estimate the energy-dissipating capacity for SCSWs. Results show that nonlinear deformation histories have significant impacts on the hysteretic responses and the deterioration of energy-dissipating capacity in SCSWs. SCSWs with higher stirrup reinforcement ratios and concrete strength exhibit less deterioration in energy-dissipating capacity, especially under ultimate conditions. Conversely, a larger self-centering parameter reduces the energy-dissipating capacity under loading sequences with amplitudes smaller than ultimate deformations. The proposed approach can provide reliable estimation of energy-dissipating capacity for SCSWs considering both loading sequences and structural features.

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自定心剪力墙能量耗散能力量化（考虑可变加载序列

本研究根据在不同加载序列下观察到的退化情况，研究并量化了自定心剪力墙（SCSW）的能量耗散能力。研究设计了 14 个具有不同结构特征的自定心剪力墙，并在不同振幅和加载序列的循环荷载下对其进行了数值模拟。考虑到加载序列和结构特征的变化，采用了指数模型来评估 SCSW 能量耗散能力的衰减。然后，利用该模型估算出昂船洲防波堤的消能能力。结果表明，非线性变形历史对滞后响应和消能能力的衰减有重大影响。箍筋配筋率和混凝土强度较高的静力压载水工结构的消能能力退化程度较小，尤其是在极限条件下。相反，在振幅小于极限变形的加载序列下，较大的自定心参数会降低能量耗散能力。考虑到加载序列和结构特征，所提出的方法可为 SCSW 提供可靠的消能能力估算。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

446

审稿时长

8 months

期刊介绍： The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.