Mechanical behavior of a novel precast beam-to-column connection with U-shaped bars and engineered cementitious composites

Dong, Baoli; Lu, Cong; Pan, Jinlong; Shan, Qifeng; Yin, Wanyun

doi:10.1177/1369433218761139

Cited by 26 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After pouring concrete into the column 10 , 11 , the pouring area of the column is too large, resulting in inefficient construction, and the emergence of weak points in the column is detrimental to its energy consumption. Pouring concrete at the end of the beam 12 can ensure the integrity of the column and conform to the design principle of a “strong column and weak beam” in seismic design; however, the longitudinal ribs in the beam cannot be continuous at the seams, and it is difficult to ensure effective stress transmission during earthquakes. Together, precast components and seams ensure the integrity of the node region and cause the joint area to have a better energy consumption performance 5 , 13 .…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of a new precast concrete frame joint with a built-in disc spring

Chen

Qin

Xie

et al. 2023

Sci Rep

View full text Add to dashboard Cite

A new, precast concrete frame beam-column connection is designed in this research. The connection adopts the assembly mode of the precast column and seam area jointly to maintain the integrity of the joint area and increase the assembly efficiency. Based on the conventional grouting sleeve connection, a disc spring device is constructed on the beam end to improve the ductility of the joint. Ten connecting specimens were tested under low cyclic loads, including two monolithic connections, four ordinary precast connections, and four new precast connections. The test parameters included the joint type and axial pressure ratio, and the difference in the seismic performance was determined by evaluating the failure mode, hysteresis characteristics, stiffness degradation, energy dissipation, and shear deformation of the joint area. Compared to monolithic connections, conventional precast connections display similar hysteresis characteristics. Although their ductility is slightly lower, their bearing capacity is higher. Compared with the previous two connections, the new connection with the built-in disc spring device has superior seismic performance. The axial pressure ratio is a significant aspect in determining the failure mode of the precast connection, and the specimen exhibits less shear damage at a larger axial pressure ratio.

show abstract

Section: Introductionmentioning

confidence: 99%

Seismic performance of a new precast concrete frame joint with a built-in disc spring

Chen

Qin

Xie

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Over the past decades, research on the seismic performance of precast prestressed concrete frame structures has been conducted worldwide, including theoretical analyses and cyclic loading/vibration table tests [17][18][19][20]. It is noteworthy that these structures have found applications in coastal environments.…”

Section: Introductionmentioning

confidence: 99%

Study on Lifetime Performance Evaluation of a Precast Prestressed Concrete Frame in Chloride Environments

Yang,

Yuan,

Liu

et al. 2023

Materials

View full text Add to dashboard Cite

This study established a comprehensive framework for evaluating the lifetime performance of precast prestressed concrete frames exposed to chloride environments. The proposed analytical framework enabled a scientifically grounded and rational assessment of both the service life and residual load-carrying capacity of precast prestressed concrete frames in chloride environments. It further served as the foundational basis for making informed decisions regarding the repair and maintenance of pertinent structures. Based on Fick’s second law, this evaluation framework established the probability distribution of the corrosion initiation time and cracking time of reinforced concrete structures due to corrosion expansion in a chloride environment. Additionally, based on the fragility analysis model and results of a precast prestressed concrete frame in a chloride environment, a practical method for evaluating the time-varying seismic performance of the precast structure considering the influence of corrosion was proposed. Furthermore, by employing the path probability model and reliability theory, time-varying reliability models were proposed to predict the three limit states of the precast prestressed concrete frame. According to the analysis results of a four-story planar frame, it could be seen that the corrosion initiation time and normal service limit state were highly sensitive to the chloride ion diffusion coefficient of the composite layer in precast concrete structures. Compared to cast-in-place structures, the presence of a composite layer in precast concrete structures could lead to more severe degradation of the time-varying seismic performance of the precast prestressed concrete frame.

show abstract

“…In these connections, beams and columns were fabricated in semi-precast form and after getting reinforced were cast in place. Utilizing these connections is usually carried out without considering the installation process requirements and there is no bearing surface for placing the precast beam (Dong et al, 2018; Yan et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Cyclic tests on two novel welded flange plate connections in precast concrete moment resisting frames

Ahooghalandary

Esmaeili

Mirrezaei

2022

Advances in Structural Engineering

View full text Add to dashboard Cite

Precast concrete moment resistant beam-to-column connections, usually designed in form of semi-monolithic connections which require in-situ concrete casting leading to a complicated assembling process. Additionally, using concrete with different ages in a connection causes cold joints and shrinkage problems. To overcome these issues, in this study, two steel beam-to-column connections (SBCs) were proposed and designed for precast concrete moment resisting frames. Compared to the semi-monolithic connections, proposed connections exclude protruding bars, resulting in a facile and rapid installation. Regarding the inverse T shape, these connections provide a better condition for installing the precast slabs and consequently reduce structural floor thickness. To evaluate the connections, two precast and one in-situ specimens were made and tested on a 2/3 scale and a cyclic load pattern was used to evaluate their performance. Test results indicate that the proposed SBCs have a maximum resistance and ductility until 1.5 and 0.9 times the in-situ concrete beam-to-column connection (ICBC), respectively. ACI374.1-05 criteria including strength and stiffness degradation ratio as well as energy dissipation ratio at drift 4% were employed to evaluate the qualification of the proposed connections. One of the proposed connections met all seismic requirements of ACI374.1-05. The plastic hinge locations were estimated by measuring the strains of rebars and steel parts of the connections. Results revealed that on the contrary to ICBC, the plastic hinge formation in proposed SBCs developed out of the beam-column joint which coincides with the strong-column and weak-beam principle in precast frames and postpones the total fracture mechanism of structure.

show abstract

Mechanical behavior of a novel precast beam-to-column connection with U-shaped bars and engineered cementitious composites

Cited by 26 publications

References 10 publications

Seismic performance of a new precast concrete frame joint with a built-in disc spring

Seismic performance of a new precast concrete frame joint with a built-in disc spring

Study on Lifetime Performance Evaluation of a Precast Prestressed Concrete Frame in Chloride Environments

Cyclic tests on two novel welded flange plate connections in precast concrete moment resisting frames

Contact Info

Product

Resources

About