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- W4386112448 abstract "Grouted sleeve connections (GSCs) have been widely used in precast concrete (PC) shear wall structures. It is critical to reveal the effect of insufficient grouting on the seismic performance of PC shear walls (PSWs), and to recommend as well as validate the repair method for insufficient grouting defects. To achieve this, three full-scale PSWs were tested under cyclic loads: one PSW without grouting defects, one PSW with grouting defect, and one repaired PSW with initial grouting defect. The effects of defect ratio and repair action were analyzed and the test results indicated: 1) bar slip dominated the failure of the specimen with the defect ratio as expected, rather than the flexural failure mode for the specimen without defects. After the occurrence of bar slip, a significant rocking phenomenon was observed, and the damage to concrete was alleviated. The pinching phenomenon was observed for the hysteretic curves, and the strength, deformation, and energy dissipation capacities were significantly lower than those of the specimen without defects, particularly the ductility. 2) The bar-slip behavior was effectively prevented after the repair of the grouting defect, and the repaired specimen exhibited the expected flexural failure mode. The damage evolution mode, strength, deformation capacity, and energy-dissipation capacity were generally comparable with those of the specimen without defects. Rocking behavior and pinching phenomenon were not observed after repair. The negative influences of insufficient grouting were approximately eliminated, thus validating the feasibility and reliability of the repair method." @default.
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- W4386112448 date "2023-11-01" @default.
- W4386112448 modified "2023-10-16" @default.
- W4386112448 title "Experimental study on seismic performance of precast concrete shear walls with defective and repaired grouted sleeve" @default.
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- W4386112448 doi "https://doi.org/10.1016/j.istruc.2023.105071" @default.
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