Cement Based Piezoelectric Composite Sensor In The Application Of Reinforced Concrete Structures

Cement based piezoelectric composite sensor can resolve the parent structure, smart materials and concrete materials, the compatibility between the problem that not only has the perception function, but also drive function, and its simple preparation, low cost and is suitable for civil engineering the field of smart materials development needs, therefore, research and development of these types of piezoelectric composites for civil engineering structures to promote the development of the intelligent direction of a broad engineering significance and academic value. However, the current cement based piezoelectric composite sensor still largely remain in the material preparation, dielectric and piezoelectric characteristics, but rather on the cement based piezoelectric composite sensor application in the structure are still relatively few studies.Therefore, this issue of the cement based piezoelectric composite sensor in the reinforced concrete structure in the sensing properties of the experimental and numerical simulation. In the experiment, the beams were produced 1:3 and 1:6 scale model framework, through pre-embedded in the cement based piezoelectric composite sensor in impact loading and cyclic loading cases, the experimental results analysis, research results reasonable. At the same time with the traditional piezoelectric ceramics in the experimental results under the same conditions were compared, using ABAQUS finite element software to simulate the experimental results, by comparison of the data, theoretical analysis and simulation studies validate the cement based piezoelectric composite sensors the application of reinforced concrete structure feasibility study for future experiments provide an experimental basis. The main research contents and results are as follows:(1) By laying a cement-based piezoelectric composite sensor of a reinforced concrete beam impact loading test and cyclic loading experiments, the experimental results with the traditional piezoelectric composite sensor results, ABAQUS finite element simulation results were compared, the results show that impact load of cement based piezoelectric composites in reinforced concrete beams showed good sensing characteristics. Reinforced concrete beams under impact loads with different power test results show that the cement based piezoelectric composite sensors in reinforced concrete beams showed good linearity. Reinforced concrete beam with different frequencies of cyclic loading experiment, the experiment from time - stress curves were compared, results showed that the cement based piezoelectric composite sensor loads at different frequencies showed good sensing properties.(2) Different loads of reinforced concrete framework of the internal forces of the numerical simulation of reinforced concrete frame in the piezoelectric sensor for optimization have been studied and found in the framework of the nodes near the peak stress rapidly changing, while the framework of nodes near the location and the beam and column mid-point location monitoring of stress load for the load position, loading is important to determine the form, is a key position sensor distribution.(3) finite element numerical simulation of the distribution based on the discussions on laying a cement based piezoelectric composite sensor of the reinforced concrete framework for impact load tests and cyclic loading experiments, the experimental results with the traditional piezoelectric composite sensor experiment The results, ABAQUS finite element simulation results were compared, the results show that the impact load of cement based piezoelectric composites reinforced concrete frame in a good performance in sensing properties. On the strength of reinforced concrete framework for the impact of different loading tests, the results show that the cement based piezoelectric composites reinforced concrete frame sensor showed good linearity. Reinforced concrete frame with different frequency cyclic loading experiment, the experimental results of the time - stress curves were compared, results showed that the cement based piezoelectric composite sensor loads at different frequencies showed good sensing characteristics.