| 新型自复位连梁阻尼器设计及其力学性能数值模拟研究 |
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| 引用本文： | 钱辉,徐建,朱俊涛,张勋,张哲.新型自复位连梁阻尼器设计及其力学性能数值模拟研究[J].世界地震工程,2020,0(4):121-129. |
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| 作者姓名： | 钱辉 徐建 朱俊涛 张勋 张哲 |
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| 作者单位： | 郑州大学 土木工程学院,河南 郑州 450001 |
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| 摘 要： | 为改善高层建筑联肢剪力墙抗震性能，消除传统连梁阻尼器残余位移较大或等效阻尼比较小等问题，设计了一种兼具耗能和自复位功能的形状记忆合金粘弹性连梁阻尼器（Shape Memory Alloy Viscoelastic Coupling Beam Damper，SVCBD），给出了新型连梁阻尼器的构造形式和工作原理。利用拉普拉斯变换得到的粘弹性材料粘性系数以及超弹性形状记忆合金（Shape Memory Alloy，SMA）本构模型，基于ABAQUS仿真平台建立了SVCBD精细有限元模型；对SVCBD滞回特性进行了模拟分析，并与普通粘弹性阻尼器进行了对比。考虑了SMA丝束初始预应力度、横截面总面积和粘弹性材料层剪切面积等参数对SVCBD滞回特性的影响。分析结果表明:与普通粘弹性连梁阻尼器（Viscoelastic Coupling Beam Damper，VCBD）相比，SVCBD滞回曲线更加饱满，耗能能力更强，残余位移减小，初始刚度也大大提高，具有很好的耗能和复位效果；SMA丝束初始预应力大小、横截面面积（即配置数量）和粘弹性材料层剪切面积均对SVCBD的耗能和复位能力具有明显的影响。
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| 关 键 词： | 自复位 形状记忆合金-粘弹性阻尼器 连梁 有限元 抗震性能 |
Numerical simulation of mechanical behaviors of the innovative self-centering coupling beam damper |
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| QIAN Hui,XU Jian,ZHU Juntao,ZHANG Xun,ZHANG Zhe.Numerical simulation of mechanical behaviors of the innovative self-centering coupling beam damper[J].World Information On Earthquake Engineering,2020,0(4):121-129. |
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| Authors: | QIAN Hui XU Jian ZHU Juntao ZHANG Xun ZHANG Zhe |
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| Affiliation: | School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China |
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| Abstract: | To improve the seismic performance of shear wall structure in high-rise building and eliminate the problem of large residual displacement as well as small equivalent damping of traditional coupling beam, in this paper, an innovativeshape memory alloy viscoelastic coupling beam damper (SVCBD) based on shape memory alloy (SMA) and viscoelastic materials was proposed. The SVCBD possesses both energy dissipation and self-centering functions. Using the Laplace transform to obtain the viscoelastic material viscosity coefficient and the ABAQUS self-contained hyperelastic material constitutive model, based on the ABAQUS platform, the SVCBD refined finite element model was established, and its hysteretic characteristics were analyzed and compared with ordinary viscoelastic coupling beam dampers (VCBD) for comparison. The parameter analysis of SVCBD was carried out, and the influence of initial prestress degree of SMA tow, total cross-sectional area and shear area of viscoelastic material layer on the hysteretic characteristics of SVCBD was considered. The analysis results show that:compared with VCBD, SVCBD has a fuller hysteresis curve, stronger energy dissipation capacity, greatly reduced residual displacement, greatly improved initial stiffness, and has good energy dissipation and reset effects; SMA tow initial prestress The size, cross-sectional area (that is, the number of configurations) and the shear area of the viscoelastic material layer all have significant effects on the energy consumption and resetting ability of SVCBD. |
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| Keywords: | self-centering shape memory alloy-viscoelastic damper coupling beam finite element seismic performance |
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