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用于混凝土结构探伤的PZT型钢筋的数值模拟

DOI: 10.3969/j.issn.1006-7043.201310024

Keywords: 钢筋, 健康监测, 数值模拟, PZT

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Abstract:

基于PZT的钢筋混凝土结构健康监测已经得到了广泛应用, 为了研究基于导向波法的PZT型钢筋结构损伤监测机理, 并进一步优化监测系统, 使用有限元软件ANSYS对PZT型钢筋构件进行数值模拟和分析。选取合适的材料参数、单元类型和网格尺寸等, 建立精细化的轴对称有限元模型进行机电耦合分析;将模拟结果与之前所做试验数据进行对比, 精确的吻合度验证了有限元模拟的准确性, 为损伤机理分析和试验优化奠定基础;改变模型中PZT与钢筋的接触方式, 输出信号值是原模型信号的5倍左右, 进而提出增强系统输出信号的优化方法。通过此研究, 得出可通过数值模拟对PZT型钢筋探伤系统进行分析并得到改进系统以增加信号的方法。

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