Determination of Elastic and Dissipative Properties of Concrete Under Dynamic Deformation

Zhu, Zhu; Zhu, Jian; Nie, Yujin; Li, Xuan; Cheng, Jialin; Zhang, Xiaobo

doi:10.15593/perm.mech/2018.4.12

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…In the formulated mathematical problem, the attached mass, adapter, and plate are considered homogeneous and isotropic. The deformation state of the attached mass and adapter is described by the relations of the linear theory of elasticity [20] and the relations used to describe the behavior of the concrete slab take into account dissipation due to internal friction forces [21]. Piezoceramics is a polycrystalline material with anisotropic electroelastic characteristics.…”

Section: Methodsmentioning

confidence: 99%

Piezoceramics Actuator with Attached Mass for Active Vibration Diagnostics of Reinforced Concrete Structures

Shardakov,

Shestakov,

Glot

et al. 2024

Sensors

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One of the effective methods of non-destructive testing of structures is active vibration diagnostics. This approach consists of the local dynamic impact of the actuator on the structure and the registration of the vibration response. Testing of massive reinforced concrete structures is carried out with the use of actuators, which are able to create sufficiently high-impact loads. The actuators, which are based on piezoelectric elements, cannot provide a sufficient level of force and the areas where it is possible to register the vibrations excited by such actuators are quite small. In this paper, we propose a variant of a piezoactuator with attached mass, which ensures an increase in the level of dynamic impact on the structure. The effectiveness of this version is verified by numerical modeling of the dynamic interaction of the actuator with a concrete slab. The simulation was carried out within the framework of the theory of elasticity and coupled electroelasticity. An algorithm for selecting the value of the attached mass is described. It is shown that when vibrations are excited in a massive concrete slab, an actuator with an attached mass of 1.3 kg provides a 10,000-fold increase in the force compared to an actuator without attached mass. In the pulse mode, a 100-fold increase in force is achieved.

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Section: Methodsmentioning

confidence: 99%