Smart concrete slabs with embedded tubular PZT transducers for damage detection

Gao, Weihang; Huo, Linsheng; Li, Hong‐Nan; Song, Gangbing

doi:10.1088/1361-665x/aa9c72

Cited by 30 publications

(27 citation statements)

References 33 publications

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“…Future work will mainly concentrate on experimental investigation to validate the URSP's functions in reducing the cracking in concrete slabs and to verify the numerical parametric study. With the recent development of low cost and embedded piezoceramic smart aggregates for concrete structures [56][57][58][59], the cracking inside a concrete structure can be monitored through active sensing approach [60][61][62] and the imaging approach [63][64][65][66]. The piezoceramic smart aggregate can function as an actuator to generate stress/ultrasonic waves and also as a sensor to detect the stress/ultrasonic waves.…”

Section: Recommendations For Future Workmentioning

confidence: 99%

Research on Application of Uplift-Restricted Slip-Permitted (URSP) Connectors in Steel-Concrete Composite Frames

et al. 2019

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Tensile stresses and cracks in concrete slabs induced by a hogging moment have always been a disadvantage of steel-concrete composite structures and key issue of concern in the design of such structures. To reduce the tensile stress and control the crack width of the reinforced concrete (RC) slab, a new type of connector, called the uplift-restricted and slip-permitted (URSP) connector has been proposed and successfully applied in the area subjected to a negative bending moment in steel-concrete composite bridges. The feasibility of the URSP connector in steel-concrete composite frame buildings is investigated in this study based on a comprehensive parametric analysis. The effects of URSP connectors on the cracking behavior, as well as the stiffness and strength of composite frames, are systematically analyzed using an elaborate finite element model, which resembles a typical composite beam-column joint subjected to both lateral loads and vertical loads. In addition, an optimized arrangement length of URSP connectors is proposed for practical design. The research findings indicate that the application of URSP connectors greatly improves the crack resistance of RC slabs without an obvious reduction of the ultimate capacity and lateral stiffness of the composite frame. It is recommended that the distribution length of URSP connectors at each beam end should be 20–25% of the frame beam length.

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Section: Recommendations For Future Workmentioning

confidence: 99%

Research on Application of Uplift-Restricted Slip-Permitted (URSP) Connectors in Steel-Concrete Composite Frames

et al. 2019

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“…Then, the structural maintenance personnel can take maintenance measures on the structure to improve structural safety factor and structural life. Currently, the new smart sensors mainly include visual sensor, acoustic emission sensor, temperature sensor, infrared thermography, and resistance sensor . Compared to other smart sensing methods, visual sensor can be used as a stand‐alone sensing tool that does not require an external environment to provide energy.…”

Section: Introductionmentioning

confidence: 99%

Microcapsule‐Based Visualization Smart Sensors for Damage Detection: Principles and Applications

Zheng

Wang

et al. 2019

Adv Materials Technologies

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The smart sensor is an effective way to detect damage and improve structural safety in structural health monitoring. Microcapsule‐based visualization sensors stand out from the smart sensors. Here, the research progress of microcapsule visualization materials in recent years is summarized and the sensing principles, influence factors, performances, applications, and future prospects are introduced. The way to achieve the visualizing function of microcapsule visualization sensors is the fabrication of microcapsules that are encapsulated with solutions of dyes or indicator. When the protective shell of microcapsules is broken, the dyes will be released and activated under optical, chemical, or mechanical conditions. These visualized microcapsules can be added to the interior of the structure or prepared as a coating to provide structural health monitoring of the interior and surface of the structure. They can accurately detect microcracks and highlight them in bright colors. Additionally, the structural health monitoring applications of microcapsule visualization sensing coatings in concrete, asphalt, and steel are presented with detailed examples. The development and application of these microcapsule visualization sensors are of great significance in improving the structural life and avoiding structural failure in engineering.

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“…A feedback sensing network using active sensing property of SAs to reduce damage-location detection time was established by Chen et al [15]. Gao et al [16] proposed the concept of smart concrete slab with embedded tubular PZT transducer array for image-based damage detection. Kong et al [17,18] developed a novel embeddable spherical SA to monitor the health of concrete structures, providing a significant improvement in the detection aperture and additional functionality for health monitoring.…”

Section: Introductionmentioning

confidence: 99%

Structural Health Monitoring and Interface Damage Detection for Infill Reinforced Concrete Walls in Seismic Retrofit of Reinforced Concrete Frames Using Piezoceramic-Based Transducers Under the Cyclic Loading

et al. 2019

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In this work, the piezoceramic-based transducers are used to perform the structural health monitoring (SHM) and interface damage detecting of non-ductile reinforced concrete (RC) frames retrofitted by post-installed RC walls. In order to develop the post-embedded piezoceramic-based transducers that can be used to identify interface failure or cracks between two structural members in retrofit construction, this work adopts the cyclic loading to test two specimens with post-embedded piezoceramic-based transducers (PPT). Since the failure of an interface between the post-installed wall and beam occurs, one of the specimens has damage in the foundation and existing boundary column and the other has damage in the top ends of column and wall. During the cyclic loading test, one transducer was used as an actuator to generate the stress waves and the other transducers were used as the sensors to detect the waves. In damaged specimens, the existence and locations of cracks and the interface damage can be detected by analyzing the wave response. Moreover, the severity of damage to the specimens can also be estimated. The experimental results indicate the effectiveness of the piezoceramic-based approach in the SHM and locating damage in shear-critical RC structural members under the seismic loading.

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Smart concrete slabs with embedded tubular PZT transducers for damage detection

Cited by 30 publications

References 33 publications

Research on Application of Uplift-Restricted Slip-Permitted (URSP) Connectors in Steel-Concrete Composite Frames

Research on Application of Uplift-Restricted Slip-Permitted (URSP) Connectors in Steel-Concrete Composite Frames

Microcapsule‐Based Visualization Smart Sensors for Damage Detection: Principles and Applications

Structural Health Monitoring and Interface Damage Detection for Infill Reinforced Concrete Walls in Seismic Retrofit of Reinforced Concrete Frames Using Piezoceramic-Based Transducers Under the Cyclic Loading

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