Performance of precast short-leg concrete shear walls with insufficient splicing bar anchorage

被引:0
|
作者
Li, Liwei [1 ]
Huang, Qian [2 ]
Wang, Tan [1 ]
Yuan, Kuo [3 ]
Zhou, Zhijie [1 ]
Dou, Lijun
机构
[1] Changchun Inst Technol, Sch Civil Engn, Changchun 130012, Peoples R China
[2] Jiangsu Coll Engn & Technol, Nantong 226001, Peoples R China
[3] Jinan Urban Construct Grp, Jinan 250000, Peoples R China
关键词
Short-leg shear wall; Grouting defect; Inadequate anchorage length; Cyclic test; Hysteresis behavior; CONNECTIONS;
D O I
10.1016/j.istruc.2025.108235
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Precast short-leg concrete shear walls with grouted sleeve splices (GSS) are widely used in residential construction. However, grouting defects have raised concerns due to their potential to cause rebar bond-slips, reduce connection strength, and impair overall structural performance. This study examines the impact of insufficient splicing rebar anchorage lengths in grouted sleeves through cyclic tests on three full-scale precast short-leg concrete shear walls, subjected to a normalized compression of 0.082. The specimens include one wall with defects on one side, one with defects on two sides, and a defect-free reference specimen. The anchorage length in defected sleeves was 4db, 50 % of the required length. All specimens experienced flexural failure, with defected walls showing a slightly more pronounced pinching effect on the hysteretic loops compared to the reference specimen. Although the stiffness degradation trends were similar across all walls, the load-carrying capacity of the defected walls was reduced by 4 % and 7 % for one-sided and two-sided defects, respectively. Furthermore, the displacement ductility values of 3.84 and 3.70 for the defected walls represent a 5 % and 10 % reduction in ductility compared to the reference specimen (4.05).
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页数:10
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