Experimental and numerical study of low-damage self-centering precast concrete frame connections with replaceable dampers

Li, Yadong; Geng, Fangfang; Ding, Youliang; Wang, Libin

doi:10.1016/j.engstruct.2020.111011

Cited by 34 publications

(7 citation statements)

References 21 publications

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“…In the previous study, a series of cyclic loading tests were carried out on joint specimens with different layouts of PT tendons and different initial PT forces. [31] The details of specimen LDSCPC1 are shown in Figure 3. The precast column and the precast beam were 1.8 m (length), and their cross-sectional dimensions were 0.4 × 0.4 and 0.25 × 0.4 m, respectively.…”

Section: Ldscpc Connections and Experimental Programmentioning

confidence: 99%

“…A clearance of 0.25 mm was considered for the contact pairs of screw hole and bolt to simulate the specimens' real contact conditions. [31] The FE modeling also took into account the anchorage and the base plate. The PT force was applied by defining the temperature field and the expansion coefficient of the corresponding material.…”

Section: Modeling Strategy and Validationmentioning

confidence: 99%

“…According to the previous test results, the LDSCPC joint's stiffness was not weaker than that of the RC joint. [31] Because of low-damage and self-centering characteristics, the stiffness of the LDSCPC joint was still very stable after undergoing large deformation. There were significant differences in mechanical mechanism and construction mode between LDSCPC and RC joints.…”

Section: Influence Of Vertical Energy Dissipation Stripmentioning

confidence: 99%

“…Recently, a low-damage self-centering precast concrete (LDSCPC) frame connection has been developed and experimentally studied. [31] The precast beams and columns with embedded steel connectors were assembled and prestressed by PT tendons. This novel joint solved the local damage of the beam end in the traditional self-centering frame joint and proposed a simple and reliable vertical shear transfer mode at the beam end, which was integrated with the fixed end of the energy dissipation device.…”

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confidence: 99%

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Design optimization of low‐damage self‐centering precast concrete frame connections to improve energy dissipation capacity

Geng

Wang

2021

Structural Design Tall Build

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Summary The low‐damage self‐centering precast concrete (LDSCPC) frame connection was a kind of earthquake‐resilient joint. It was composed of precast beams and columns with embedded steel connectors, post‐tensioned tendons, and replaceable metallic yield dampers. The LDSCPC connections showed excellent self‐centering ability and low‐damage characteristics in cyclic load tests. However, the energy dissipation performance of the metallic yield damper with Z‐shaped energy dissipation strips in the test was not as good as the design expectation. Based on the finite element (FE) model validated by experiments, a series of parametric analyses were carried out to investigate the influence of various parameters on the connections' hysteretic response. The results showed that the existence of screw‐hole clearance and the lack of bolt preload made the damper cannot fully play its due performance. The damper's design parameters also had room for further optimization. Based on this, two optimization schemes of the metallic yield damper were proposed. The FE analysis results showed that the two optimization schemes significantly improved the joints' bearing capacity and energy dissipation capacity, which were the feasible and reliable upgrade schemes for LDSCPC connections.

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Section: Ldscpc Connections and Experimental Programmentioning

confidence: 99%

Section: Modeling Strategy and Validationmentioning

confidence: 99%

Section: Influence Of Vertical Energy Dissipation Stripmentioning

confidence: 99%

mentioning

confidence: 99%

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Design optimization of low‐damage self‐centering precast concrete frame connections to improve energy dissipation capacity

Geng

Wang

2021

Structural Design Tall Build

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“…The unique gap opening phenomenon at the beam-column interface of hybrid connections allows the use of several types of energy dissipators. Some of the energy dissipators in literature include metallic yielding devices [16,17], friction devices [18], bracing systems [19], and smart materials [20]. Hybrid connections with different energy dissipators are evaluated based on performance.…”

Section: Introductionmentioning

confidence: 99%

Performance of a Ductile Hybrid Post-Tensioned Beam-to-Column Connection for Precast Concrete Frames under Seismic Loads: A Review

et al. 2021

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The performance of precast concrete frame structures against seismic loads mainly depends on the beam-to-column connection. A ductile hybrid connection consists of unbonded post-tensioning steel and bonded reinforcement bars, both of which provide overall moment resistance to the frame. Post-tensioning steel acts as a restoring force which brings the structure back to its initial position upon unloading. Mild steel acts as an energy dissipator which yields in tension and compression. To evaluate the performance of precast frame structures, the structural engineer requires extensive knowledge of the complex nonlinear behavior of the connection. Standardization to mass produce is one of the benefits of precast construction, but with standardization in design there is severe risk. All previous earthquakes have clearly shown that continuous repetition of accepted practice without proper engineering review can lead to disaster. It is important to understand how different parameters of the connection influence the behavior and performance of the frame against seismic loads. The present study helps structural engineers and researchers with a detailed review of hybrid post-tensioned connections. This review is focused mainly on precast beam-to-column connections, studies on the development of hybrid connections, performance evaluations of hybrid connections, and the performance evaluation of precast frames with hybrid connections.

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A review of performance evaluation of RC-infilled frames under earthquake scenarios

Yacin,

Muthu Kumar,

Satyanarayanan

2023

Multiscale and Multidiscip. Model. Exp. and Des.

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Experimental and numerical study of low-damage self-centering precast concrete frame connections with replaceable dampers

Cited by 34 publications

References 21 publications

Design optimization of low‐damage self‐centering precast concrete frame connections to improve energy dissipation capacity

Design optimization of low‐damage self‐centering precast concrete frame connections to improve energy dissipation capacity

Performance of a Ductile Hybrid Post-Tensioned Beam-to-Column Connection for Precast Concrete Frames under Seismic Loads: A Review

A review of performance evaluation of RC-infilled frames under earthquake scenarios

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