Moment and energy dissipation capacities of post-tensioned precast concrete connections employing a friction device

Koshikawa, Takeaki

doi:10.1016/j.engstruct.2017.02.012

Cited by 45 publications

(10 citation statements)

References 17 publications

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“…Recently, Wang et al [27] proposed a new precast prestressed frame joint and concluded that the post-tensioned strands can effectively offer a self-centring ability to the connections. However, the use of energy dissipation devices is needed to enhance the ability of prefabricated beam to column joints using post-tensioning to dissipate energy due to their low inherent damping [28]. Although different types of energy dissipation damping devices including steel yielding devices [22,29], friction damping devices [30][31][32] and lead extrusion damping devices [33,34] have been experimentally validated through beam-column connection tests.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on a precast beam-column joint with double grouted splice sleeves

Lü

Huang

Dai

et al. 2019

Engineering Structures

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The construction speed and quality of precast frame structures are greatly influenced by weld, tie, prestress, cast concrete requirements, etc. on site. To address these challenges, a precast beam-column joint connected by double grouted sleeves is proposed. This paper presents an investigation on seismic behaviour of the joint subjected to static and cyclic loadings. In total, six precast specimens with different assembly lengths, transition bar diameters and types of grouted sleeve and one cast-in-place control specimen were tested. Results show that the double grouted sleeve splices in joints perform well. The initial stiffness of prefabricated specimens is larger than that of the control specimen and the load bearing capacity of the prefabricated specimens is similar to that of the control specimen. As the transition rebar diameter increases from 16 mm to 18 mm, the energy dissipation ability of the prefabricated specimens is increased by 64.8% but is approximately 41% lower than that of the control specimen due to their relatively lower deformation capacity. Threads in the grouted sleeve have a negative impact on the deformation and energy dissipation abilities of the joints. The method for cast-in-situ joint is adequate for predicting the flexural capacity of precast joint connected by double grouted sleeves.

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Section: Introductionmentioning

confidence: 99%

Experimental study on a precast beam-column joint with double grouted splice sleeves

Lü

Huang

Dai

et al. 2019

Engineering Structures

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“…Morgen and Kurama 12 proposed a friction damper to improve the seismic performance of the PT connection, which was investigated by experiment and theory 13,14 . The above solutions and other similar studies 15–19 fully demonstrate that energy‐dissipation technology is an efficient strategy for improving the seismic performance of connections and PC structures.…”

Section: Introductionmentioning

confidence: 80%

Experimental study on precast concrete moment‐resisting frame system with sector lead viscoelastic dampers

Deng

et al. 2021

Struct Control Health Monit

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Connection failure between precast components greatly increases the risk of collapse of a precast concrete (PC) frame during earthquakes. In this study, a PC frame structure system with sector lead-viscoelastic damper (SLVD) is proposed, in which the SLVD not only protects the wet connection but also absorbs input energy in earthquakes. Two two-storey two-bay PC frame were constructed, one without SLVD (PC specimen) and the other with SLVDs (PS specimen). These PC frames were tested under cyclic loading and compared to an analogous monolithic frame (RC specimen). The differences in hysteretic curves, bearing capacity, strength and stiffness degradation, and energy dissipation capacity of the three specimens are compared in detail to investigate the impact of SLVD on the seismic performance of the PC frame. The experimental results show that the bearing capacity of the PS specimen in positive and negative loading directions increased by 42.53% and 31.26%, respectively, compared with the PC specimen. The ultimate deformation capacity and ductility of the PS specimen were better than those of the PC specimen. The seismic performance of the precast frame with SLVDs was similar to that of the monolithic reinforcement frame structure.

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“…For a given u c , the value of height c of concrete equivalent compressive region shall be assumed (the initial value can be assumed as the height of compressive region in state 2 in Figure 3), then the elongation of mild steel and prestressed strands can be calculated according to the section similarity relationship. It is noteworthy that the rotation center for gap opening and the center of resultant force of concrete in compressive region are not at the same point, the former is deemed as the inner edge of concrete compressive region (Koshikawa, 2017;Pampanin et al, 2001) and the latter is deemed as center point of compressive region. Since the unbonded section of mild steel will penetrate to beam side and column side when in tension, resulting in increase of unbonded length, the empirical equation for increment of unbonded length in each side is as follows (Ozden and Ertas, 2010;Raynor et al, 2002):…”

Section: Calculation Of Skeleton Curvesmentioning

confidence: 99%

“…In addition, there are some research practices on combination of other energy dissipation devices with prestressed steel, such as angle steel Kurama, 2010, 2011), fan-shaped friction dampers (Morgen and Kurama, 2004;Morgen et al, 2007), buckling restrained energy dissipation devices (Liu et al, 2018;Wang et al, 2019), friction devices (Koshikawa, 2017;Song et al, 2014) etc. Although these energy dissipation devices can improve the energy dissipation capacity of joints effectively, considering the economic indicator, construction difficulty, interference with floor installation and other factors, it is impossible to carry out extensive engineering promotion nowadays.…”

Section: Introductionmentioning

confidence: 99%

Seismic design of hybrid unbonded post-tensioned precast concrete joints based on bearing capacity and energy dissipation capacity

Song

et al. 2020

Advances in Structural Engineering

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This paper provides a practical design method for hybrid unbonded post-tensioned precast concrete joints. Such joints featured with self-centering capacities have been widely favored in recent years. However, the absence of design methods hinders their further promotion. To solve the issue, two methods for calculating mechanical behavior of the joints were first studied: characteristic points method and iterative method. The effectiveness of the methods was verified by the existing test results. On this basis, a joint design method considering both yield bearing capacity and energy dissipation capacity was proposed. Moreover, to facilitate design, some factors affecting the bearing capacity were discussed. A five-story frame structure was designed by the proposed design method, and the influence of two design factors on structural response was analyzed by utilizing nonlinear time-history method. The analysis results show that: with the increase of energy dissipation factor αs, the post-earthquake residual deformation of the structure tends to increase linearly, while the accumulated damage of the structure will decrease continuously; both overdesign and underdesign of bearing capacity of the joint are unfavorable; and near-field earthquake may cause irreparable damage to structural columns, making the residual deformation of structures contrary to the self-centering capacity of joints, which shall be considered during engineering design.

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Moment and energy dissipation capacities of post-tensioned precast concrete connections employing a friction device

Cited by 45 publications

References 17 publications

Experimental study on a precast beam-column joint with double grouted splice sleeves

Experimental study on a precast beam-column joint with double grouted splice sleeves

Experimental study on precast concrete moment‐resisting frame system with sector lead viscoelastic dampers

Seismic design of hybrid unbonded post-tensioned precast concrete joints based on bearing capacity and energy dissipation capacity

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