Tensile behavior of half grouted sleeve connections: Experimental study and analytical modeling

Yuan, Huang; Zhenggeng, Zhu; Naito, Clay; Yi, Wei-Jian

doi:10.1016/j.conbuildmat.2017.06.154

Cited by 121 publications

(33 citation statements)

References 21 publications

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“…This enables a preferred failure mode of the connections with bar fracture outside the sleeves. However, the lower deformation capacities of the grouted sleeve splices have also been confirmed by many researchers [28]. In a number of experimental studies which have been carried out to investigate the seismic performance of column-to-foundation connection with grouted sleeves [29][30][31], the test results showed that this type of connection exhibited comparable strength but lower energy dissipation capacity, lower stiffness and poor ductility as compared with the CIP counterparts.…”

Section: Figure 1 Multi-storey Precast Reinforced Concrete Columnsmentioning

confidence: 86%

Experimental study of prefabricated RC column-foundation assemblies with two different connection methods and using large-diameter reinforcing bars

Fan

Feng

et al. 2020

Engineering Structures

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Prefabricated reinforced concrete (RC) column-to-foundation connections are typically located at the critical region of the columns and are subjected to a combination of large compression and bending deformation under earthquake actions. The seismic behaviour of these connections affects the structural behaviour of precast concrete frames as a whole. The prefabricated column-to-foundation connections using grouted sleeves (PC-S) and grouted corrugated ducts (PC-C) were two typical connections. However, up to now the researches of the seismic performance of the two typical connections are mainly concentrated on small-diameter reinforcing bars used in the connections. The use of large-diameter high-strength reinforcing bars in the large size precast columns has clear advantages in precast structures as it helps improve the construction efficiency due to a reduced number of connected longitudinal bars and less congestion of the reinforcing bars. In this study, two full-scale prefabricated columnfoundation assemblies with different connection methods, designated as PC-S and PC-C, respectively, along with one cast-in-place reference specimen, were prepared and tested under quasi-static cyclic loading. In all three specimens, large-diameter high-strength reinforcing bars were adopted as the longitudinal reinforcement. The test results showed that both types of connections exhibited similar strength as compared to the cast-in-place specimen.In specimen PC-S, buckling of the longitudinal bars and rupture of stirrups at the top of the grouted sleeves were observed, and this led to lower ductility with an ultimate lateral drift ratio of 4.5%. In specimen PC-C, a more pronounced pinching behaviour was observed after a lateral drift ratio of 2%, which was due to significant bondslip displacements of large-diameter high-strength longitudinal bars in the overlap region. The three specimens exhibited different plastic hinge mechanisms at the column bases as demonstrated from the measured steel strains, cracking patterns and failure modes. Based on the experimental results, further improvements of using largediameter high-strength reinforcing bars in the two types of prefabricated column-to-foundation connections are 2 recommended.

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Section: Figure 1 Multi-storey Precast Reinforced Concrete Columnsmentioning

confidence: 86%

Experimental study of prefabricated RC column-foundation assemblies with two different connection methods and using large-diameter reinforcing bars

Fan

Feng

et al. 2020

Engineering Structures

View full text Add to dashboard Cite

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“…Conventional precast assembly is based on casting of joints or using couplers that have been traditionally implemented to splice longitudinal reinforcing bars to ensure sufficient bonding between reinforcing bars to transfer moments. Considerable experimental studies (Rave-Arango et al 2018;Tullini and Minghini 2016;Alias et al 2013;Yuan et al 2017;Ling, Rahman, and Ibrahim 2014) have spliced precast column components for rigid connections. Tullini and Minghini (2016) performed full-scale tests on precast reinforced concrete column-to-column connections made with grouted sleeve splices.…”

Section: Significance Of the Studymentioning

confidence: 99%

Strain evolution of L-shaped precast columns spliced by laminated metal plates, part I

Nguyen

Hong

Kim

2021

Journal of Asian Architecture and Building Engineering

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Mechanical joints for both irregular steel-concrete composite precast frames and reinforced concrete precast frames were developed to replace conventional cast-in-place concretes in the previous study of the authors. Novel connections modified from conventional steel joints having fully restrained moment connections offer rapid and facile erections. This study aims to numerically identify microscopic strain evolution and failure modes of the laminated metal plates splicing L-shaped precast composite columns. Numerical parameters including material properties of structural components of mechanical joint were implemented to determine damages and strength degradations with associated fractures. Comprehensive numerical results agreed well with test data, which explored structural behavior and contribution of each structural element of mechanical joint to flexural capacity. Strain evolution showed that degradation of the mechanical joints was retarded by interior bolts to a level similar to monolithic columns, resulting in contribution of mechanical joint to flexural capacity of columns. Influence of axial loads on the behavior of columns with mechanical joints was also evaluated to provide design recommendations.

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“…Full-scale tests of conventional grouted sleeves used to splice precast reinforced concrete columns were also conducted by Tullini and Minghini (2016). Rave-Arango et al (2018); Alias et al (2013); Yuan et al (2017); Ling, Rahman, and Ibrahim (2014) carried out experimental studies to create rigid connections for precast column components using sleeves. However, joints for rectangular precast frames explored by these researchers do not fit into the connection of irregular precast columns that have an "L" shape as suggested by the present authors.…”

Section: Motivation and The Significance Of The Studymentioning

confidence: 99%

Strain evolution of mechanical joints for L-shaped precast columns Part II: Application to a tall building

Nguyen

Hong

Kim

2021

Journal of Asian Architecture and Building Engineering

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This study succeeded in an experimental investigation of the authors' previous studies in which L-shaped dry mechanical joints were developed and tested to demonstrate applicability to precast concrete frames. In their early study, the use of L-shaped dry mechanical joints assembling precast concrete frames was veri fied both experimentally, demonstrating all structural components at joint experimentally functioned well, supporting both cyclic and monolithic loads. In the present study, design recommendations and collateral benefits were provided to design tall building frames based on an extensive strain analysis, while improving joints using interior stiffeners to greatly enhance the structural performance of mechanical joints. How fast strains of joints are developed as deflections progressed was also explored based on rates of strain increase relative to deflection, while identifying degradation mechanism of mechanical joints (including rebars and steel sections attached to mechanical plates) that led to brittle failure modes. This study aims to provide design protocol for a 20-story apartment building with L-shaped precast columns spliced by mechanical plates. Beamcolumn joints were assembled by extended beam endplates, which were bolted to plates embedded in columns. A sufficient beam depth was determined by avoiding stress concentration exerted by extended beam endplates.

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Tensile behavior of half grouted sleeve connections: Experimental study and analytical modeling

Cited by 121 publications

References 21 publications

Experimental study of prefabricated RC column-foundation assemblies with two different connection methods and using large-diameter reinforcing bars

Experimental study of prefabricated RC column-foundation assemblies with two different connection methods and using large-diameter reinforcing bars

Strain evolution of L-shaped precast columns spliced by laminated metal plates, part I

Strain evolution of mechanical joints for L-shaped precast columns Part II: Application to a tall building

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