Cyclic tests of precast post-tensioned concrete filled steel tubular (PCFT) columns with internal energy-dissipating bars

Shen, Yu; Liu, Xueshan; Li, Yongxing; Li, Jianzhong

doi:10.1016/j.engstruct.2020.111651

Cited by 28 publications

(41 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The initial post-tensioning force (F PT_ini ) and total energy dissipating force (F ED ) [Criteria ( 1) and ( 2)] affect the selfcentering and ED capacities of the PRC pier and need to be properly tuned to obtain the desired cyclic performance. 12,31 The recentering coefficient Λ c , proposed by Guerrini et al, 40 is employed to evaluate both behaviors.…”

Section: Design Criteria and Proceduresmentioning

confidence: 99%

“…9,16,20 Faster precast construction processes and lower material costs are additional benefits highlighted by these research studies. These encouraging outcomes from previous work led to many follow-up investigations into precast rocking piers, including exploration of viable construction methods, 12,21 enhanced ED solutions, 10,22 advanced simulation techniques, 8,23,24 and realistic load testing scenarios. [23][24][25][26][27] The amount of ED and the level of initial PT force in the PT rocking pier are two key design parameters, and their combination needs to be carefully proportioned to optimize the self-centering and ED capacity of the system.…”

Section: Introductionmentioning

confidence: 97%

“…5 In this context, there is an urgent societal need for innovative structural solutions that can effectively achieve seismic resilience, mitigating disruptions to the traveling public. 4,[6][7][8] A typology of resilient bridges is obtained using self-centering rocking piers, [8][9][10][11][12][13][14][15][16][17] where unbonded post-tensioned (PT) elements and energy dissipation (ED) components are combined within precast elements. The PT elements provide the self-centering capability, while the ED components aim to increase the structure's dissipation capacity.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, the ED elements provide additional strength, stiffness, and dissipation capacity producing beneficial effects in terms of peak drifts reduction; however, after experiencing the post-elastic behavior, they can generate forces that oppose displacements toward zero drift. 12,31,32 In this context, several research studies investigated the optimum combination of ED devices and PT force on the seismic response of PT hybrid rocking columns; however, these studies are often limited to numerical simulations. 17,28,29,[31][32][33][34][35] Li et al 31,33 performed analytical studies on the quasi-static and dynamic response of unbonded PRC rocking piers considering several configurations varying both the initial PT forces and amounts of ED bars.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Parametric experimental investigation of unbonded post‐tensioned reinforced concrete bridge piers under cyclic loading

Shen

Freddi

et al. 2022

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

The present paper investigates the cyclic performance of unbonded post‐tensioned reinforced concrete (PRC) rocking piers by a parametric experimental campaign. PRC rocking specimens are assembled by hybrid connections, containing an ungrouted post‐tensioned (PT) bar and grouted mild steel bars, that is, energy‐dissipation (ED) components. The properties of a benchmark PRC pier were defined according to a design procedure to control its strength, ductility, energy dissipation capacity, and self‐centering behavior. Five additional PRC piers with different ED bars amounts, initial PT force, and ED bars unbonded lengths were also tested to investigate the influence of these parameters on the cyclic performance. The test results show the superior cyclic performance of the PRC pier in limiting both damage and residual deformations. The parametric analysis highlighted that decreasing the initial PT force and/or ED bars amount enhances the PRC's ED capacity at the expense of the lateral force resistance and self‐centering behavior. Moreover, it has been observed that the influence of ED bars’ unbonded length only minimally affects the PRC pier's cyclic performance due to ED bars’ bond‐slip and concrete cover spalling of the pier shaft. Analytical models describing the PRC piers’ lateral force‐drift cyclic behavior were formulated and calibrated, showing a good agreement with test results for all specimens. The results and findings provide a valuable reference and solution for tailoring an efficient parameter recommendation of PRC rocking piers.

show abstract

Section: Design Criteria and Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Parametric experimental investigation of unbonded post‐tensioned reinforced concrete bridge piers under cyclic loading

Shen

Freddi

et al. 2022

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

show abstract

“…The low damage design methods have been applied in a real bridge named as 'Wigram-Magdala Link Bridge' in New Zealand. In 2021, Shen et al (2021) tested precast CFT columns under cyclic loading. The columns achieved 6.8% drift without significant decrease of loading capacity, and only minimal damage was found in the column except some crushing damage of the mortar bed between the column and the footing.…”

Section: Damage Mitigationmentioning

confidence: 99%

State-of-the-art review of the seismic performance of precast segmental columns

Hao

2022

ABEN

View full text Add to dashboard Cite

Prefabricated construction is attracting increasing interest in recent years, since this construction method has various advantages as compared to the cast-in-situ construction method, such as less construction time, higher quality control and reduced environmental impact. As a typical type of prefabricated structures, precast segmental column (PSC) has been used as the substructure to accelerate the construction speed of bridges. This paper reviews the performances of the PSCs under seismic loadings. In particular, the seismic performances of the PSC itself under cyclic loading and real earthquake ground motions, the seismic behaviours of PSC-supported bridge structures, and the responses of precast rocking column (PRC)-supported bridges, are comprehensively reviewed and their pros and cons are discussed. For the completeness of the paper, the performances of the PSCs under multiple dynamic hazards, namely impact and blast loadings here are also briefly summarized at the end of this paper.

show abstract

Energy dissipation mechanisms in three‐dimensional rocking motion of cylindrical structures

Zhou

Shen

et al. 2023

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

In recent years, there has been a growing recognition that the rocking motion of structures, especially cylindrical ones, should be evaluated with three‐dimensional (3D) models. However, dissipation mechanisms in 3D models are complex and have yet to be well established. This paper presents an analytical study on an inherent dissipation mechanism based on the rolling friction model and an external dissipation mechanism based on energy dissipators (EDs) for 3D rocking cylindrical structures. Through a variational formulation, the nonlinear equations of motion are derived considering the rolling friction model and the Bouc–Wen model. Compared with the existing inherent dissipation model in literature, the rolling friction model has a noticeable advantage that it can capture the energy dissipation behavior during free vibration under various initial conditions. Additionally, the rolling friction model is more versatile since the contact coefficient is adjustable. On the other hand, external EDs further enhance the energy dissipation of the structures. Roles of the inherent and external mechanisms in the 3D rocking motion of cylindrical structures against earthquakes are assessed using a series of near‐fault pulse‐like ground motions. Results indicate the inherent dissipation mechanism, that is, the rolling friction model, cannot avoid overturning under near‐fault pulse‐like ground motions, leading to unstable structures. This is because an uplifted cylinder will continuously absorb energy from earthquake excitations, while the amount of energy dissipated by the rolling friction model is small. Comparatively, adding external EDs is effective in mitigating seismic responses and thereby avoiding overturning.

show abstract

Cyclic tests of precast post-tensioned concrete filled steel tubular (PCFT) columns with internal energy-dissipating bars

Cited by 28 publications

References 37 publications

Parametric experimental investigation of unbonded post‐tensioned reinforced concrete bridge piers under cyclic loading

Parametric experimental investigation of unbonded post‐tensioned reinforced concrete bridge piers under cyclic loading

State-of-the-art review of the seismic performance of precast segmental columns

Energy dissipation mechanisms in three‐dimensional rocking motion of cylindrical structures

Contact Info

Product

Resources

About