Seismic performance of emulative precast concrete beam–column connections with alternative reinforcing details

Lee, Hung-Jen; Chen, Hsi-Ching; Syu, Jia-Hao

doi:10.1177/1369433217693633

Cited by 19 publications

(11 citation statements)

References 11 publications

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“…[32]; (b) A2 adapted from ref. [27]; (c) P-ECC2 adapted from ref. [28]; (d) Specimen 3 adapted from ref.…”

Section: Quantification Resultsmentioning

confidence: 99%

Quantification of Moment–Rotation Relationship of Monolithic Precast Beam–Column Connections

Song

et al. 2021

Buildings

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The accurate prediction of nonlinear structural behaviors under different seismic intensities is an important basis for seismic resilience assessments of building structures. The moment–rotation relationship is often used to characterize the seismic performance of connections, and is widely used in high-efficiency nonlinear structural analysis. In this paper, a method of calculating the curve using a four-linear equivalent model is presented, aiming to quantify the characteristic point parameters of the moment–rotation curves of monolithic precast beam–column (MPBC) connections for engineering design purposes. The method considered the contribution of the elastic flexure of beams and columns, the relative slip of beam longitudinal bars in the core zone, and the formation of plastic hinges at beam ends to the total deflection. Due to the presence of local complex configurations in MPBC connections, the fine fiber section method was used for moment–curvature analysis of critical beam sections. The determination of the sectional analysis processes was controlled by the strain of steel bars or concrete or their coupling effect. In addition, a two-step method was proposed to construct the moment–rotation relationship of cruciform beam–column connections for solving the deformation compatibility of beams on both sides of the column caused by asymmetric reinforcement and the strength difference between new and old concrete. To reflect the current manufacturing level of MPBC connections, 58 representative specimens reported in recent years were analyzed and classified as type 1–5. All types of MPBC connections and their 18 cast-in situ counterparts were calculated using the proposed method for both verification and quantification. The verification showed that the proposed method had good applicability to both cast-in situ and precast beam–column connections. The quantification showed that the characteristic point parameters were slightly different between these two connections. Accordingly, modification coefficients were suggested for MPBC connections to facilitate design.

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“…[32]; (b) A2 adapted from ref. [27]; (c) P-ECC2 adapted from ref. [28]; (d) Specimen 3 adapted from ref.…”

Section: Quantification Resultsmentioning

confidence: 99%

Quantification of Moment–Rotation Relationship of Monolithic Precast Beam–Column Connections

Song

et al. 2021

Buildings

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“…The use of cement-based composites could reduce the density of reinforcement in the joint area without affecting its seismic performance. Lee et al [ 21 ] proposed a beam-column joint with an anchor head on the bottom rebar of the beam. The study found that the seismic performance of the joint was equivalent to that of the cast-in-place joint, but because the bottom bar of the beam has an anchor head, it will increase the possibility of cracking in the panel zone.…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance of Precast Concrete Frame Beam-Column Connections with High-Strength Bars

Zhang

Zhiqiang

et al. 2022

Materials

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As the construction industry is striding towards the industrialization of green buildings, a precast concrete frame beam-column joint with high-strength reinforcement was proposed. Simulate reversed cyclic loading was carried out on two precast connections and one cast-in-place connection to examine the seismic behavior of the proposed new precast connection. The main test variables between the two precast connections were the strength of the reinforcement at the bottom of the beam. The failure shape, hysteresis curve, skeleton curve, strength, deformation ability, stiffness degradation, and energy dissipation were monitored and compared with the cast-in-place connection. The findings of this paper showed that the precast joints had good strength reserve, and the seismic performance in the later stage of loading even exceeds the cast-in-place joints. It was also found that the plastic hinge zone of the beam could be moved away from the column surface via reinforcement method. Additionally, based on the experiment, a detailed nonlinear finite element analysis (FEA) method was developed to reproduce the test response of specific types of bending moment-resistant precast concrete beam-column connections under a reversed loading test, which provided a theoretical reference for further research of the connections.

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“…For a good seismic performance under earthquakes, the bottom longitudinal bars of precast beams always extrude and anchor into joint cores to achieve reinforcement continuity. Numerous studies on these connections were conducted to improve the seismic performance and pursue better workability, and the earthquake-resistant capacity of these connections was proved satisfactory and accepted by researchers and engineers (Alcocer and Carranza, 2002; Guan et al, 2019; Lee et al, 2017; Restrepo, 1995). Because the anchored straight bars increased the conflicting risk of precast components and reduced the speed of construction at sites in practice, another important emulative precast beam–column connection was proposed and tested under reversal cyclic loadings, in which precast beams use U-shaped shells at the beam ends.…”

Section: Introductionmentioning

confidence: 99%

Cyclic loading test on a locally post-tensioned precast concrete beam–column connection

Guan

Yang

et al. 2019

Advances in Structural Engineering

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A novel precast concrete beam–column connection locally post-tensioned using arc-shaped prestressing bars was proposed for satisfactory seismic performance and rapid construction. Three full-scale cruciform specimens, including one monolithic reference specimen, were tested under reversal cyclic loadings to evaluate the seismic behaviours. Grade 630 steel rods and high-strength deformed steel rebars were used for the arc-shaped prestressing bars in the precast specimens. The results show that the proposed precast connection presents an acceptable seismic performance and that the structural details should be ameliorated to improve the energy dissipation capacity. The design philosophy of strong column-weak beam is applicable to the new precast system. Finally, a strut-and-tie model was developed to investigate the force transfer mechanism of the novel precast connection.

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Seismic performance of emulative precast concrete beam–column connections with alternative reinforcing details

Cited by 19 publications

References 11 publications

Quantification of Moment–Rotation Relationship of Monolithic Precast Beam–Column Connections

Quantification of Moment–Rotation Relationship of Monolithic Precast Beam–Column Connections

Seismic Performance of Precast Concrete Frame Beam-Column Connections with High-Strength Bars

Cyclic loading test on a locally post-tensioned precast concrete beam–column connection

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