Abstract
Two groups of grouted sleeve splices for steel profile were tested to investigate their tensile behavior, serving as pilot studies for novel prefabricated reinforced concrete shear wall structures. In the first group, four splice specimens with different embedded lengths of steel profile were monotonic tensile loaded to determine an appropriate anchorage length. In the second group, three splice specimens with a conservative anchorage length of steel profile were tested under repeated tensile loading, cyclic loading at high stress, and cyclic loading at large strain, respectively. Parametric studies were then conducted on sleeve thickness, grout strength, offset of steel profile, and misalignment of steel profile using finite element method (FEM)-based models. The results show that the splices in the second group behaved well with minor residential deformation and almost no pinching effect. The optimized sleeve thickness could be appropriately determined using FEM models. The compressive strengths of the grout exceeding a threshold value and the offset of steel profile had minor influence on splice behavior, while the misalignment of steel profile had a pronounced effect.
Highlights
Precast concrete structures are constructed worldwide because they speed up construction, require less labor, and minimize the impact on the environment compared to cast-in-situ concrete structures [1,2]
This study aimed to investigate the behavior of the grouted sleeve splice for the steel profile under different tensile loadings by means of experimental and numerical studies
Circular cracks occurred in the grout located in the opening end of the sleeves when the specimens approached yielding
Summary
Precast concrete structures are constructed worldwide because they speed up construction, require less labor, and minimize the impact on the environment compared to cast-in-situ concrete structures [1,2]. A majority of precast components are fabricated in factories, transported to the construction site, and connected to implement structural integrity To achieve this process, using grout to connect reinforcing steel bars in adjacent components is regarded as a preferred technology due to controllable tolerance and no need to weld at construction site. Over the last few decades, many experimental and numerical studies have been conducted to understand the failure modes, influencing factors and structural performance of the grout-filled splices [5,6,7,8,9,10,11,12,13]. The critical factors that influenced the structural performance of the splices were proved to be the embedded length of the rebar, sleeve configuration and grout
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