The seismic behaviour of precast concrete interior joints with different connection methods in assembled monolithic subway station

Liu, Hongtao; Wang, Zhenyu; Du, Xiuli; Shen, Geoffrey Qiping

doi:10.1016/j.engstruct.2020.111799

Cited by 36 publications

(14 citation statements)

References 31 publications

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“…e main reason for larger ductility was that the opening gap of the semi-precast beam and the corbel of the column contribute to the global deformation in the later loading. A similar explanation of the above finding had also reported by Liu et al [23].…”

Section: Hysteretic Response and Envelopessupporting

confidence: 91%

“…In terms of the failure mode, two reference specimens failed in different ways [23,36], as shown in Figure 6. Compared with the cast-in-place specimen, the following observation was realized.…”

Section: Overview Of Failure Patternmentioning

confidence: 99%

“…e assembled monolithic concrete subway station contained the amount of joints located in the transverse direction and longitudinal direction. e joints of columnbasement [21], sidewall-basement [22], and column-laminated slab (composite slab) [23] have been studied and detailed in a standalone paper. Tests of full-scale precast and cast-in-place specimens showed that precast concrete specimens were capable of matching the overall performance of the monolithic connection.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Precast Member Corbels on Seismic Performance of Precast Beam‐Slab‐Column Joints

Liu

Kong

2021

Advances in Civil Engineering

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To improve the construction efficiency of precast structures, reinforced concrete corbels acted as support members are the most common connection method. This work presents the performance of a specific beam-to-column connection using corbels with different anchorage arrangements in precast beam-slab-column interior joint taken out from precast underground subway station. This paper investigates the performance of a specific full-scale precast concrete beam-slab-column interior joint with corbels and various connected methods subjected to low-cycle repeated loading. Meanwhile, the influences of concrete corbels (including column- and beam-end corbels) on the shear strength and deformation are investigated. The analyses results indicated that (1) corbels of the laminated beam (composite beam) can obviously improve the shear stress of the core region, which was beneficial for specimen design followed the strong-joint-weak-member concept; (2) a simplified approach to deal with the uneven thickness of corbels in the core region was proposed, which was utilized to study the effect of thickness on the shear performance of the core region; (3) the shear stress increased with respect to the compression stress, and the shear strain had a trend of decreasing according to calculating results using modified compression field theory; and (4) the deterministic expressions were proposed to predict the designed load of column corbels based on three different connection methods between laminated beams and core region of joint.

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Section: Hysteretic Response and Envelopessupporting

confidence: 91%

Section: Overview Of Failure Patternmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Precast Member Corbels on Seismic Performance of Precast Beam‐Slab‐Column Joints

Liu

Kong

2021

Advances in Civil Engineering

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“…The stiffness degradation under loading can represent the accumulation of internal structural damage and the structural capacity to resist deformation, which can be used to evaluate the mechanical behaviour of a structural member and aid in the design and modelling of a structural subassembly 10 [50][51][52][53][54]. The initial stiffness 𝐾 1 , secondary stiffness 𝐾 2 , and third equivalent stiffness 𝐾 3 can be calculated based on the characteristic parameters obtained from Tables 5 and 6, which can be described as follows:…”

Section: Evolution Of Stiffnessmentioning

confidence: 99%

Experimental study on flexural behaviour of prefabricated concrete beams with double-grouted sleeves

Lü

Yang

et al. 2021

Engineering Structures

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“…Much work has been performed on the mechanical properties of precast concrete beam-column joints. Liu et al [ 29 ] studied different connecting methods for the precast beam-column joints and compared the seismic behavior of a precast joint with a cast-in-place one, the result showed that the precast joint was capable of matching performance in terms of peaking strength, stiffness, deformation performance of the cast-in-place connections, but the failure cracks of the precast specimen always concentrated in the junction between precast elements and post-pouring concrete. Feng et al [ 30 ] studied the effects of post-cast connections on seismic performance of precast concrete frame joints and suggested that the location of the connection should be at a plastic hinge length away from the beam end; the distance was proposed as 2 h. Zhang et al [ 31 ] proposed a new kind of precast composite beam-column joints without concrete cast in place in the core area, which consisted of a precast column with a built-in steel skeleton, a precast beam with a built-in H-steel beam, and connecting parts.…”

Section: Introductionmentioning

confidence: 99%

Seismic Damage Evaluation of Beam-Column Joints in Monolithic Precast Concrete Frame Structures

Cao

Yang

2022

Materials

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Quantitative calculation and evaluation of seismic damage are very important for structural safety, performance-based structural analysis, and seismic reinforcement. However, the relevant research results for precast concrete structures are extremely limited. In this paper, the seismic damage evaluation of beam-column joints in monolithic precast concrete frames was studied through cyclic loading tests and damage index calculation. The seismic damage process, load-displacement relationship, stiffness degradation, and the influence of axial compression ratio were analyzed, then the damage indexes were calculated and analyzed, and the quantitative evaluation of joint damage was conducted last. The results show that the connection seams can significantly affect the mechanical properties of precast joints, easily causing damage concentration, resulting in a lower bearing capacity and faster stiffness degradation compared with a cast-in-situ joint. A larger axial compression ratio can bring higher bearing capacity for the precast joints, and the peak load can be increased by 42.9% when the axial compression ratio is increased from 0.2 to 0.4. In contrast, the stiffness degradation will be accelerated with the increase in the axial compression ratio. From yield load to peak load, the stiffness of the precast joint with the largest axial compression ratio decreases by 46.0%, while the joint with the smallest axial compression ratio is only 36.4%. The damage index model adopted in this paper can accurately reflect the damage characteristics of the precast joints. The presented damage states based on the damage index calculation can accurately reflect the joint’s damage characteristics according to different stages. The paper realizes the quantitative damage evaluation for this kind of joint and provides a theoretical basis and method for further studies.

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The seismic behaviour of precast concrete interior joints with different connection methods in assembled monolithic subway station

Cited by 36 publications

References 31 publications

Influence of Precast Member Corbels on Seismic Performance of Precast Beam‐Slab‐Column Joints

Influence of Precast Member Corbels on Seismic Performance of Precast Beam‐Slab‐Column Joints

Experimental study on flexural behaviour of prefabricated concrete beams with double-grouted sleeves

Seismic Damage Evaluation of Beam-Column Joints in Monolithic Precast Concrete Frame Structures

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