Experimental Study on Seismic Performance of Precast Pretensioned Prestressed Concrete Beam-Column Interior Joints Using UHPC for Connection

Xiong, Xu; Xie, Yifan; Yao, Gangfeng; Liu, Ju; Yan, Laizhang; Li, He

doi:10.3390/ma15165791

Cited by 9 publications

(4 citation statements)

References 38 publications

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“…The strength of the vast majority of the tested specimens reported in the literature was dictated by premature failure modes [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 ]. In fact, the mechanisms that occurred in most of the experimental tests were concrete pry-out failure, concrete splitting, concrete breakout, concrete edge failure, or anchor failure.…”

Section: Comparison Between Model Results and Tests Results Borrowed ...mentioning

confidence: 99%

“…Moreover, the phenomena that have been investigated for cast-in and post-installed shear anchors are premature failure modes, i.e., concrete edge failure, concrete splitting, anchor failure, concrete breakout, concrete pry-out failure, cyclic load failure, collapse due to prying actions [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 ]. Conversely, strength dictated by the concrete that surrounds the anchors by a pure shear mechanism has not been investigated, although this failure mode is the one that provides the greatest strength, so it should be the aim of anchor design as long as the geometric conditions allow it.…”

Section: Introduction: State-of-the-art About Post-installed Concrete...mentioning

confidence: 99%

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Ultimate Shear Force of an Any Anchor Group Post-Installed into Concrete

Foraboschi

2023

Materials

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This paper is devoted to the fastening system that consists of a number of anchors of approximately equal effective embedment depth, called “anchor group”, embedded into hardened concrete, used to transmit forces transverse to the anchors from an attachment to the concrete. The anchor group is far from the edges and is subjected to no more than marginal axial forces. Being post-installed, rather than cast-in, the embedded end of each anchor is not hooked, and no nuts, washers, or plates are attached to the embedded shaft. The paper focuses on the transverse forces that can be transmitted across an anchor group from an attachment to the concrete. The paper provides an analytical model for predicting the maximum (ultimate) shear force that an anchor group can bear, thus called “shear strength”. The model hence allows the structural designer to predict the shear strength of an anchor group post-installed into concrete. The model is based on five mechanical assumptions, which were established from a wide-ranging numerical analysis. Model predictions turned out to be, on average, 20% lower than the results of experiments performed on cast-in anchor groups borrowed from literature. The comparison verifies model accuracy, considering that the tested anchor groups benefitted from the extra-strength furnished by nuts and washers attached to the embedded shaft. Model predictions were also compared to code provisions; the former resulted to be up to one third of the latter. The paper presents and comments those comparisons, as well as all mathematical development. Applications of the model to wide-ranging case studies is presented and discussed as well.

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Section: Comparison Between Model Results and Tests Results Borrowed ...mentioning

confidence: 99%

Section: Introduction: State-of-the-art About Post-installed Concrete...mentioning

confidence: 99%

Ultimate Shear Force of an Any Anchor Group Post-Installed into Concrete

Foraboschi

2023

Materials

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“…UHPC's compact microstructure offers superior resilience against environmental factors, and the embedded fibers in UHPFRC provide a robust defence against crack evolution, safeguarding the integrity of the connection. With their exceptional adhesion properties and the versatility, they bring to structural design, these advanced concretes not only ensure superior structural behavior but also promise cost-effectiveness over the long term, positioning them at the forefront of contemporary construction research and practice [14][15][16][17][18]. In the field of structural engineering, computational simulations have emerged as an indispensable tool.…”

Section: Introductionmentioning

confidence: 99%

Exploring strength and ductility responses of beam-column joints using UHPC and UHPFRC employing concrete damaged plasticity

Santos da Silveira,

Natã Zenatti,

de Miranda Saleme Gidrão

et al. 2024

Frattura Ed Integrità Strutturale

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Structures subjected to severe loads, such as earthquakes, often develop cracks at the beam-column joints, underscoring the significance of these regions in design. This study focuses on a comparative analysis of beam-column joints constructed with Ultra-High-Performance Concrete (UHPC) and Ultra-High-Performance Fiber-Reinforced Concrete (UHPFRC) using the Finite Element Method (FEM) within the Abaqus software, contrasting with Low-Strength Concrete (LSC) and Normal-Strength Concrete (NSC). The results underscore the superiority of UHPFRC in compressive and tensile strength, coupled with enhanced ductility. Furthermore, distinct failure mechanism are observed in the concretes, captured by concrete damaged plasticity (CDP), leading to a deeper understanding of the behavior of these high-strength materials. These findings carry significant implications for enhancing structural safety and performance, particularly in situations involving seismic or other severe loads.

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“…Meanwhile, the wet connection is an important kind of connection of assembled structures. Guan Toshiba et al [14][15][16][17][18] put forward that UHPC new material should be applied to the post-cast parts, and a full-scale seismic test of the joints was carried out and compared with the cast-in-place joints. The results show that UHPC material can significantly improve the shear-bearing capacity and ductility coefficient of prefabricated joints while reducing the weight of prefabricated structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Studies on the Seismic Performance of New Assembled Concrete Frame Beam–Column Joints

Liu

2023

Buildings

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A new type of assembled concrete beam–column joint based on a bolted connection was proposed, aiming to complete the post-earthquake node repair work by replacing precast beams and bolts. To study the seismic performance of the new beam–column joints, two full-scale components of the new joints were fabricated and subjected to low cyclic loading. The whole process from crack generation to component failure was investigated in detail, and seismic performance indicators such as the hysteresis curve, skeleton curve and stiffness degradation curve were compared and analyzed. Based on the experimental results, ABAQUS finite element software was applied to numerically simulate cast-in-place joints and test joints. Based on the failure mechanism of the new assembled beam–column semi-rigid joints, a stress analysis of semi-rigid joints was carried out. The research results show that the two new joints have good seismic performance and energy dissipation performance. Bolts and precast beams are the main stress components, and the repair of new joints can be completed by replacing bolts, which meets the seismic design concepts of “strong columns and weak beams” and “strong joints and weak components”. The larger the diameter of the bolts, the higher the load capacity and the lower the stiffness degradation rate. The finite element simulation results are high-accuracy and can well reflect the seismic performance of the components. It is found that cast-in-place joints are better in energy dissipation capacity than test joints, but the ultimate bearing capacity of test joints is better than that of cast-in-place joints. Based on the experimental stress characteristics of the nodal core zone, a mechanical analysis model of the nodal core zone of the new assembled concrete beam–column joints is proposed, and shear force calculation equations for the core zone of the new assembled concrete beam–column rigid joints and semi-rigid joints are derived.

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Experimental Study on Seismic Performance of Precast Pretensioned Prestressed Concrete Beam-Column Interior Joints Using UHPC for Connection

Cited by 9 publications

References 38 publications

Ultimate Shear Force of an Any Anchor Group Post-Installed into Concrete

Ultimate Shear Force of an Any Anchor Group Post-Installed into Concrete

Exploring strength and ductility responses of beam-column joints using UHPC and UHPFRC employing concrete damaged plasticity

Experimental and Numerical Studies on the Seismic Performance of New Assembled Concrete Frame Beam–Column Joints

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