Mechanical performance of the grouted lapped double reinforcements anchored in embedded corrugated sleeves

Zhao, Chenhui; Ding, Fa‐xing; Duan, Quancheng; Cao, Zimei; Xu, Fu; Yang, Caiqian; Lu, Dagang; Xiang, Ping

doi:10.1016/j.istruc.2020.08.004

Cited by 19 publications

(7 citation statements)

References 18 publications

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“…Excessive exposed rebar is mainly used for important loading-bearing components. With the technology advancements being seen today with respect to the connections for PC components in construction [62][63][64], prefabricated construction has been developing rapidly. However, due to the low level of standardization of component production, having a wide variety of components increases the difficulty in mold design and production, rebar configuration, and binding.…”

Section: Discussionmentioning

confidence: 99%

Study on Complexity of Precast Concrete Components and Its Influence on Production Efficiency

Liu

Tong

Li³

et al. 2022

Advances in Civil Engineering

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Prefabricated construction has been well recognized for its benefits, including accelerated construction cycle time and improved sustainability. However, low efficiency in the production of precast concrete components due to component and production complexity has not been sufficiently addressed in previous research. This paper explores the complexity of precast concrete components by establishing complexity indices and evaluating their influence on production efficiency. First, referring to research on product complexity in the machinery manufacturing industry, we define the complexity of precast concrete components in the construction industry. Then, based on a literature review, field studies, and expert interviews, we systematically construct the complexity indices of precast concrete components using the three-stage coding method, Grounded Theory. The overall complexity index system for precast concrete components constructed comprises 16 constituent complexity indices in three dimensions (i.e., structural complexity of the component, production complexity, and management complexity). The relationship between complexity indices and production efficiency is then explored using structural equation model analysis based on the data collected through a questionnaire survey. The results reveal that complexity indices have a significant impact on the production efficiency for precast concrete components, where the number of embedded parts, waiting time in production, operating proficiency of workers, and degree of automation of the production line are found to be the most influential complexity indices. This study provides a foundation upon which production managers improve production efficiency for precast concrete components based on an analysis of their product complexity.

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Section: Discussionmentioning

confidence: 99%

Study on Complexity of Precast Concrete Components and Its Influence on Production Efficiency

Liu

Tong

Li³

et al. 2022

Advances in Civil Engineering

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“…Loading and Measurement Set-Up. In this paper, the vertical pulling load is applied to the gout, and a displacement lever is designed for measurement of displacement of grout, which is different from existing methods [15,16]. As shown in Figure 5, a hydraulic jack is used to apply tensile and pulling loads to the specimen.…”

Section: Specimenmentioning

confidence: 99%

“…Grout is widely utilized in sleeve connection of prefabricated structures due to its low cost and convenient construction [15][16][17]. To overcome the shortcomings of the clamping and core concrete connection methods, a core grout connection method is proposed by the authors based on the stress analysis and geometric characteristics of PHC pipe piles.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Bonding Performance between Prestressed Concrete Pipe Piles and Core Grout

Yin,

Li,

2023

Advances in Civil Engineering

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To make the bearing capacity tests safer and more affordable for prestressed high-strength concrete (PHC) piles, this paper proposes a reaction device for anchor piles filled with core grout based on the geometric and mechanical characteristics of PHC piles. The proposed reaction device has the advantages of convenient construction, strong controllability of the connection quality and low cost. In addition, the pile will not experience prestress unloading or tensile stress under the effect of the upward pulling load. To promote the application of the reaction device developed for PHC pile bearing capacity tests, experimental studies are conducted on the bonding performance between the core grout and the inner wall of the PHC pile. The influence of various factors such as the strength of the core grout, the grouting length, the curing time, and the inner diameter of the PHC pile on the bond strength between the core grout and the inner wall of the PHC pile are investigated. Results show that as the inner diameter of the PHC pile increases, the bond strength between the core grout and the inner wall of the PHC pile decreases with a maximum difference of 5%. The bond strength decreases as the grouting length increases, and gradually stabilizes, with a difference of no more than 10% between the maximum and minimum bond strength values. The higher the strength of the grout is, the greater the bond strength between the core grout and the inner wall of the PHC pile is. The bond strength between the core grout and the inner wall of the PHC pile increases with the increase of the curing time within 28 days of curing, and the bond strength at 3 days meets the requirements of the PHC pile bearing capacity test.

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“…the relative bond area of the reinforcement, is 4/d. The larger the diameter of reinforcement is, the smaller the relative bond area is, so the average bond stress of the specimen decreases [29,30]. by 40.7% and 60.5%, respectively, in comparison with the specimen with the anchorage length of 7d, and the average bond stress decreased by 1.5% and 7.0%, respectively.…”

Section: Influence Of Reinforcement Diameter On Anchorage Performancementioning

confidence: 99%

Mechanical performance of overlap connections with grout-filled anchor reinforcements in embedded metal corrugated pipe

Chen

Ding

Xiang

et al. 2020

Archiv.Civ.Mech.Eng

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To study the mechanical performances of a new kind of overlapping connection with grouted anchor reinforcements in embedded metal corrugated pipes, a total of 24 groups of 72 specimens were prepared and tested. The overlap connection performance of grouting anchor reinforcements in embedded metal corrugated pipes was studied by bi-directional tension test. The factors such as the diameter of anchor reinforcements, anchor length and location of reinforcements were taken into account. The results show that the bi-directional tension test method can effectively reflect the actual stress state of the overlap connection. When the connection satisfies the structural requirements, the location of the reinforcement has little influence on the anchorage performance of the connection. Under the same conditions, the failure load of the specimens will increase with the increase of the diameter of reinforcements and the anchorage length. Meanwhile, under the same conditions, the average bond stress decreases with the increase of the reinforcement diameter and the anchorage length. Experimental results and analysis show that overlap connection with grout-filled anchor reinforcements in embedded metal corrugated pipe has good anchoring performances, and also has the advantages of simple structure and convenient construction.

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Mechanical performance of the grouted lapped double reinforcements anchored in embedded corrugated sleeves

Cited by 19 publications

References 18 publications

Study on Complexity of Precast Concrete Components and Its Influence on Production Efficiency

Study on Complexity of Precast Concrete Components and Its Influence on Production Efficiency

Experimental Study on Bonding Performance between Prestressed Concrete Pipe Piles and Core Grout

Mechanical performance of overlap connections with grout-filled anchor reinforcements in embedded metal corrugated pipe

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