Experimental study on flexural behaviour of prefabricated concrete beams with double-grouted sleeves

Lü, Zhiwei; Wu, Bin; Yang, Shaopan; Hou, Jinyou; Ji, Zhuangzhuang; Li, Yongfu; Huang, Jun; Zhang, Mingzhong

doi:10.1016/j.engstruct.2021.113237

Cited by 13 publications

(2 citation statements)

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“…The connection of the reinforcement of adjacent prefabricated elements is a vital part of Pbs to ensure integrity. GSs are the most widely used in Pbs for connecting prefabricated elements due to their strength and performance [2][3][4][5]. For example, GSs are often applied in prefabricated elements, including shear walls [2], frame columns [3], and frame beams [4,5], and they can achieve equivalent mechanical performance as cast-in-place structures while having more advantages in construction.…”

Section: Introductionmentioning

confidence: 99%

“…GSs are the most widely used in Pbs for connecting prefabricated elements due to their strength and performance [2][3][4][5]. For example, GSs are often applied in prefabricated elements, including shear walls [2], frame columns [3], and frame beams [4,5], and they can achieve equivalent mechanical performance as cast-in-place structures while having more advantages in construction. The core of GS technology is transferring stress among prefabricated elements by filling them with high-strength grout; however, grout leakage triggered by poor adhesive bonded plugs or a hostile environment usually occurs near the steel sleeve [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Debonding Detection in Grouted Sleeves Using Axisymmetric Longitudinal Guided Waves

Liu,

Li,

Cui

2023

Sensors

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Grouted sleeves (GSs) are a type of precast joint that can effectively connect steel rebars with excellent performance. However, the grouting debonding problem, which can occur due to the leakage of the glue plug, can seriously affect the properties of GSs. In this paper, a guided-wave-based structural health monitoring (SHM) method is used to detect debonding in GSs. The axisymmetric longitudinal mode is selected as the incident wave since it is sensitive to axial damage. Eight piezoelectrics (PZTs) are then symmetrically installed to actuate signals. The proposed samples are GSs with four different debonding sizes. First, the relationship between the arrival time of the first wave packet and the debonding size is explored through theoretical derivation. The arrival time decreases linearly with an increasing debonding size. A similar trend is observed when the relationship is verified via a numerical simulation and experimental results. This method will provide a reference for detecting debonding in similar GS multilayer structures.

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