Cyclic flexural tests of hybrid steel–precast concrete beams with simple connection elements

Yang, Keun–Hyeok; Seo, Eun-A; Hong, Seung‐Hyun

doi:10.1016/j.engstruct.2016.03.045

Cited by 31 publications

(9 citation statements)

References 9 publications

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“…The flexural ductility of beams significantly depends on the longitudinal reinforcement index (ω s ). Yang et al [18] showed that the µ ∆ values decrease was proportional to the exponential function with the increase in ω s . Two specimens with longitudinal GFRP bars had similar ω s values whereas the ω s value determined for the specimen F-H-C had 1.47 times higher than that for the specimen F-N-C, as given in Table 1.…”

Section: Flexural Ductilitymentioning

confidence: 99%

“…The flexural ductility of beams significantly depends on the longitudinal reinforcement index ( s  ). Yang et al [18] showed that the   values decrease was proportional to the exponential function with the increase in s  . Two specimens with longitudinal GFRP bars had similar s  values whereas the s  value determined for the specimen F-H-C had It is also interesting that both specimens F-N-G and F-H-G exhibited a similar increasing rate of W i up to the beam failure whereas the specimen F-N-C had higher W i values than the specimen F-H-C, indicating a 7.91 times higher value of W p in the specimen F-N-C.…”

Section: Flexural Ductilitymentioning

confidence: 99%

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Cyclic Flexural and Shear Performances of Beam Elements with Longitudinal Glass Fiber Reinforced Polymer (GFRP) Bars in Exterior Beam-Column Connections

Yang¹,

Mun²

2018

Applied Sciences

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The objective of this study is to examine the effect of the poor anchorage length of glass fiber reinforced polymer (GFRP) bars used for longitudinal reinforcement on the flexural and shear performances of beam elements in exterior beam–column connections made using high-strength materials. Six exterior beam–column connection specimens were tested under reversal cyclic loads applied at the free-end of the beam. The selected strength categories of materials in the beam element were as follows: 35 MPa and 70 MPa for the design compressive strength of concrete, 400 MPa and 600 MPa for the yield strength of conventional longitudinal steel bars, and 800 MPa for the tensile strength of the GFRP bar. All the longitudinal steel bars of the beams satisfied the minimum requirements of the provisions of ACI 318–14, whereas all the longitudinal GFRP bars of the beam were linearly anchored into the column section, resulting in poor anchorage length, especially for the beam with the concrete compressive strength of 35 MPa. The flexure-governed beams with GFRP bars exhibited a greater increasing rate in displacement at the pre-peak state and did not display the plastic flow characteristic after the peak load when compared with companion beams with steel bars. The beams with GFRP bars possessed lower diagonal cracking strengths and shear capacities than the companion beams with steel bars although the shear capacities of the beams with GFRP bars could be conservatively predicted using the design equation of ACI 440.1R–15 provision. The low elastic modulus and elongation capacity of GFRP bars resulted in large displacements and brittle post-peak beam performances. Furthermore, the lack of anchorage length of GFRP bars in exterior beam–column connection significantly reduced the flexural strength and ductility of the beam element.

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Section: Flexural Ductilitymentioning

confidence: 99%

Section: Flexural Ductilitymentioning

confidence: 99%

Cyclic Flexural and Shear Performances of Beam Elements with Longitudinal Glass Fiber Reinforced Polymer (GFRP) Bars in Exterior Beam-Column Connections

Yang¹,

Mun²

2018

Applied Sciences

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“…P0.5 and S0.5 are used to study pre-stressing styles and the impact of the longitudinal upper cross-section steel joints to provide the stress, respectively. Stress is acting on the lower and upper longitudinal reinforce bars transferred to the lower and upper wings of steel H through elbow L [14]. Fig.…”

Section: Concrete Beam To Steel Beam Connectionmentioning

confidence: 99%

“…18. Connection detail of the concrete beam to the steel beam [14] In general, based on crack propagation measures, cyclic-displacement load curves, consistency between records and strain distribution calculations, and the suitability of maximum loads with load counts of collapse, the proposed joints for connecting steel H and reinforced concrete beams may be considered as rigid connections within resist the working moments.…”

Section: Concrete Beam To Steel Beam Connectionmentioning

confidence: 99%

Beam-to-Beam Connection of Precast Concrete Structures: State of the Art

et al. 2019

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The use of precast concrete is known to improve productivity, quality control, and cost efficiency in reinforced concrete structure. The Connection is the most important aspect of precast concrete structures. The connection transfers force between the precast components, determine strength, stiffness, and ductility of the whole structure. Providing joint in the beam-column connection region always cause difficulties during the erection stage. Relocation of the connection at a certain distance from the column to the beam span is an alternative solution that creates the beam-to-beam connection. It will be much easier to assemble the connection that consists of some joints. Research and application of the precast concrete beam-to-beam connection details have published since 1975. This paper reviews the state of the art of research and practical application of beam-to-beam connection system related to connection models, joint locations, and details. It concluded from the review that the developing research leads to improve the performance of earthquake resisting structures

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“…The precast prestressed concrete joints had a seismic performance that was comparable to the equivalent monolithic system.The precast concrete frame joints must effectively transmit the bending moment and shear force between the precast components, and they also should have good ductility and energy dissipation capacity. Research on precast concrete structures mainly focused on the connection mode of joints, the mechanical properties of joints, and the seismic performance of prefabricated structures for different connection modes [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].Maya et al[1] studied precast elements that were joined by high-performance fiber reinforced concrete and short steel bars. The studies by Liu et al [2] and Lee et al [3] investigated precast concrete beam-column joints connected by sleeves and with anchor plates.…”

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confidence: 99%

Experimental Study of a New Precast Prestressed Concrete Joint

et al. 2018

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Precast monolithic structures are increasingly applied in construction. Such a structure has a performance somewhere between that of a pure precast structure and that of a cast-in-place structure. A precast concrete frame structure is one of the most common prefabricated structural systems. The post-pouring joint is important for controlling the seismic performance of the entire precast monolithic frame structure. This paper investigated the joints of a precast prestressed concrete frame structure. A reversed cyclic loading test was carried out on two precast prestressed concrete beam–column joints that were fabricated with two different concrete strengths in the keyway area. This testing was also performed on a cast-in-place reinforced concrete joint for comparison. The phenomena such as joint crack development, yielding, and ultimate damage were observed, and the seismic performance of the proposed precast prestressed concrete joint was determined. The results showed that the precast prestressed concrete joint and the cast-in-place joint had a similar failure mode. The stiffness, bearing capacity, ductility, and energy dissipation were comparable. The hysteresis curves were full and showed that the joints had good energy dissipation. The presence of prestressing tendons limited the development of cracks in the precast beams. The concrete strength of the keyway area had little effect on the seismic performance of the precast prestressed concrete joints. The precast prestressed concrete joints had a seismic performance that was comparable to the equivalent monolithic system.

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Cyclic flexural tests of hybrid steel–precast concrete beams with simple connection elements

Cited by 31 publications

References 9 publications

Cyclic Flexural and Shear Performances of Beam Elements with Longitudinal Glass Fiber Reinforced Polymer (GFRP) Bars in Exterior Beam-Column Connections

Cyclic Flexural and Shear Performances of Beam Elements with Longitudinal Glass Fiber Reinforced Polymer (GFRP) Bars in Exterior Beam-Column Connections

Beam-to-Beam Connection of Precast Concrete Structures: State of the Art

Experimental Study of a New Precast Prestressed Concrete Joint

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