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Application assessments of concrete piezoelectric smart module in civil engineering

机译：混凝土压电智能模块在土木工程中的应用评估

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Traditional structural dynamic analysis and Structural Health Monitoring (SHM) of large scale concrete civil structures rely on manufactured embedding transducers to obtain structural dynamic properties. However, the embedding of manufactured transducers is very expensive and low efficiency for signal acquisition. In dynamic structural analysis and SHIM areas, piezoelectric transducers are more and more popular due to the advantages like quick response, low cost and adaptability to different sizes. In this paper, the applicable feasibility assessment of the designed "artificial" piezoelectric transducers called Concrete Piezoelectric Smart Module (CPSM) in dynamic structural analysis is performed via three major experiments. Experimental Modal Analysis (EMA) based on Ibrahim Time Domain (ITD) Method is applied to experimentally extract modal parameters. Numerical modal analysis by finite element method (ELM) modeling is also performed for comparison. First ten order modal parameters are identified by EMA using CPSMs, PCBs and FEM modeling. Comparisons are made between CPSMs and PCBs, between FEM and CPSMs extracted modal parameters. Results show that Power Spectral Density by CPSMs and PCBs are similar, CPSMs acquired signal amplitudes can be used to predict concrete compressive strength. Modal parameter (natural frequencies) identified from CPSMs acquired signal and PCBs acquired signal are different in a very small range (3%), and extracted natural frequencies from CPSMs acquired signal and FEM results are in an allowable small range (similar to 5%) as well. Therefore, CPSMs are applicable for signal acquisition of dynamic responses and can be used in dynamic modal analysis, structural health monitoring and related areas.
机译：大型混凝土土木结构的传统结构动力分析和结构健康监测（SHM）依靠制造的嵌入换能器获得结构动力特性。然而，制造的换能器的嵌入非常昂贵并且信号采集效率低。在动态结构分析和SHIM领域中，压电换能器因其具有响应速度快，成本低和对不同尺寸的适应性等优点而越来越受欢迎。在本文中，通过三个主要实验对设计的“人工”压电换能器称为混凝土压电智能模块（CPSM）进行动态结构分析的可行性评估。基于易卜拉欣时域（ITD）方法的实验模态分析（EMA）用于实验提取模态参数。还通过有限元方法（ELM）建模进行了数值模态分析，以进行比较。 EMA使用CPSM，PCB和FEM建模来确定前十阶模态参数。比较CPSM和PCB，FEM和CPSM提取的模态参数。结果表明，CPSM和PCB的功率谱密度相似，CPSM采集的信号幅度可用于预测混凝土的抗压强度。从CPSM采集信号和PCB采集信号中识别出的模态参数（固有频率）在很小的范围内（3％）不同，从CPSM采集的信号和FEM结果中提取的固有频率在允许的较小范围内（大约5％）也一样因此，CPSM适用于动态响应的信号采集，可用于动态模态分析，结构健康监测和相关领域。

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