具有自复位功能的SMA混凝土剪力墙抗震性能研究

项目名称： 具有自复位功能的SMA混凝土剪力墙抗震性能研究

项目编号： No.51478438

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 建筑科学

项目作者： 钱辉

作者单位： 郑州大学

项目金额： 82万元

中文摘要： 本项目拟开展超弹性形状记忆合金（SMA）增强混凝土剪力墙抗震性能和设计方法研究。通过不同循环加载条件下SMA筋力学性能试验，揭示因潜热引起的材料温度变化规律以及相应的马氏体相变机理，建立适用于工程结构地震反应分析的SMA应变率相关动态本构模型；通过低周反复加载模型试验，研究超弹性SMA混凝土剪力墙损伤破坏演化过程，揭示其损伤发生发展机理、裂缝自修复和结构自复位规律及破坏失效机理；基于有限元分析软件，建立SMA混凝土剪力墙数值分析模型，揭示材料特征参数对剪力墙损伤破坏的影响规律；在数值模拟和试验研究的基础上，提出超弹性SMA混凝土剪力墙抗震性能的评价方法，建立基于性能的简化设计方法。本项目涉及工程学、材料学和力学等多学科领域，具有学科交叉性，其研究成果对发展智能材料与高层建筑结构灾变振动控制技术具有重要的科学意义。

中文关键词： 形状记忆合金；剪力墙；结构振动控制；自复位；抗震性能

英文摘要： The goal of this proposed study is to improve the seismic performance of reinforced conrete shear wall using superelastic shape memory alloy bars. Through cyclic tensile tests on the mechanical behaviors of superelastic SMA bars under virious loading conditions, the temperature change law of the SMA material due to the latent heat under different loading conditions as well as the mechanism of the relative Martensite transformation will be revealed, and a strain rate-dependent dynamic constitutive model of superelastic SMA bar for the seismic response analysis of engineering structure will be presented. In order to study the process of damage evolution of the SMA-RC shear wall, pseudo-static tests on scale models will be carried out and the experimental results will reveal the occurrence and development mechanism of the damage, capacities of crack self- reparation and recentering, and the mechanism of failure. Based on the FE software, the numerical analysis model for superlestic SMA- RC shear wall will be presented, and the effect of the characteristic parameters on the seismic performance of SMA-RC shear wall will be studied. Based on the numerial simulation and experimental results, the evaluation method for the seismic performance of superelastic SMA-RC shear wall will be proposed and the performance-based simplified design method will be presented. In this project, multi-disciplinary fields inculuding engineering science, material science and mechanics will be involved and interdisciplinary cross will exist, and the research results have important scientific significance for the development of smart materials and seismic vibration control strategies for high-rise building.

英文关键词： Shape memory alloy;Shear wall;Structural vibration control;Recentering;Seismic performance