Structural Behavior of FRP-Retrofitted RC Beams under Combined Torsion and Bending

Pishro, Ahad Amini; Zhang, Shiquan; Zhang, Zhengrui; Zhao, Yana; Pishro, Mojdeh Amini; Zhang, Lili; Yang, Qihong; Postel, Victor

doi:10.3390/ma15093213

Cited by 14 publications

(8 citation statements)

References 56 publications

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“…Therefore, it is necessary to study the response of a single frame under load combinations. According to relevant studies [17,18], steel frame beams are mainly subjected to torsion and shear forces. In a finite element simulation, steel frame structures are subjected to dead loads, live loads, wind loads, and vertical and horizontal seismic loads.…”

Section: Load Conditions On the Framementioning

confidence: 99%

Seismic Design of Large-Span, Heavy-Load Transfer Truss for Zhanjiang Bay R&D Building

Lan,

Li,

et al. 2023

Buildings

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The Zhanjiang Bay Laboratory R&D Building project aims to create a favorable working, research, and living environment. Zone II of the Zhanjiang Bay Laboratory R&D Building is equipped with a large-span, heavy-load transfer truss to obtain a large space on the ground floor. The overall structure adopts a steel frame-core tube structure system. In order to reduce the deflection of the large-span, heavy-load transfer truss, eight diagonal pull rods are installed between the large-span, heavy-load transfer truss and the core tube. The Q235 cross-shaped replacement section can consume construction load energy. Adopting replacement methods can reduce the stress and damage of diagonal pull rods caused by construction loads. The structure adopts a performance-based seismic design method for seismic calculation and analysis. In addition, a special analysis was conducted on the single frame structure. The major results can be summarized as follows: during small earthquakes, all structural components are in the elastic stage; during large earthquakes, frame beams yield first, but frame columns and core tubes do not yield; even without considering out-of-plane constraints, the structure can still meet the requirements.

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Section: Load Conditions On the Framementioning

confidence: 99%

Seismic Design of Large-Span, Heavy-Load Transfer Truss for Zhanjiang Bay R&D Building

Lan,

Li,

et al. 2023

Buildings

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show abstract

“…Santhakumar et al presented numerical research on non-retrofitted and retrofitted RC beams exposed to combined bending and torsion utilizing the finite element method [8]. Ahad et al used ABAQUS to conduct finite element analysis for increasing the orientation of different FRP-reinforced and unreinforced concrete beams [9].…”

Section: Project Overviewmentioning

confidence: 99%

Comparison and Selection of Multiple Construction Schemes for the Large-Span and Heavy-Load Transfer Truss

Lan,

Xing,

Qin

et al. 2023

Buildings

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The main building of Zone II of Zhanjiang Bay Laboratory R&D Building adopts a steel frame–core tube shear wall structure system, with a 53.4 m large-span and heavy-load-transfer truss on the fourth floor. In order to propose the optimal construction and installation scheme for the large-span and heavy-load-transfer truss, the simplified model, single model, and 3D model are utilized to compare Scheme 1 with rigid connection and Scheme 2 with elastic connection and rigid connection. After completing the construction of the underground layer and towers on both sides, in Scheme 1, the fourth-floor transfer truss is directly connected to the towers on both sides in a rigid manner. Subsequently, the support at the bottom of the transfer truss is removed, allowing for layer-by-layer construction. The transfer truss remains rigidly connected to both side towers throughout. On the other hand, in Scheme 2, initially, the transfer truss is connected to both side towers through upper chords and diagonal bars before being constructed upwards until reaching the sixth floor. Once formed as a whole with two floors above using large diagonal tie rods, lower chords of the large-span and heavy-load-transfer truss are then connected with another diagonal bar to establish a rigid connection between the transfer truss and towers; thereafter, upward construction continues. Following completion of constructing a seven-story large diagonal tie rod, whereupon removal of support at the bottom of the conversion truss occurs, subsequent layer-by-layer construction takes place accordingly. It has been observed that employing Scheme 2 can enhance stress distribution within core barrel shear walls as well as transfer trusses while ensuring deflection and stress levels meet requirements for the large-span and heavy-load-transfer truss, thereby rendering structural stress more rationalized, leading to significantly improved overall safety.

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“…25 It was observed that the Finite Element (FE) models available in the ABAQUS platform give a reasonable prediction for the RC structural elements. 26 Theoretical analysis of the bending resistance of ECC-concrete composite beams was developed and compared well with the experimental results. 27,28 Analytical techniques and simplified formulas for the calculations of cracking, yield, and ultimate moments of different cases as well as deflections of ECC-concrete composite beams reinforced with steel bars were proposed.…”

Section: Introductionmentioning

confidence: 99%

“…For an accurate numerical prediction of the behavior of ECC elements, adequate material models, which can represent the behavior of ECC, are essential 25 . It was observed that the Finite Element (FE) models available in the ABAQUS platform give a reasonable prediction for the RC structural elements 26 …”

Section: Introductionmentioning

confidence: 99%

Effect of ECC layer thickness and reinforcement ratio on the load carrying capacity of steel‐reinforced composite beams

Arulanandam¹,

Kanakubo

Singh

et al. 2023

Structural Concrete

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The present study investigates the effect of Engineered Cementitious Composites (ECC) layer thickness against various reinforcement ratios on the flexural performance of reinforced ECC-concrete composite beams. In total, 20 reinforced composite beams are selected from the literature to predict their flexural response using Finite Element (FE) analysis. In addition to the FE analyses, a detailed analytical study is performed using the strain compatibility procedure to predict the flexural strength of ECC-concrete composite beams. The results from the FE analyses are compared against the experimental results and are found to show a close agreement. Using the validated FE models, detailed parametric studies are conducted to determine the effectiveness of different design parameters such as (a) ECC height replacement for a reinforcement ratio, (b) reinforcement ratio for an ECC height replacement, and (c) adequate

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Structural Behavior of FRP-Retrofitted RC Beams under Combined Torsion and Bending

Cited by 14 publications

References 56 publications

Seismic Design of Large-Span, Heavy-Load Transfer Truss for Zhanjiang Bay R&D Building

Seismic Design of Large-Span, Heavy-Load Transfer Truss for Zhanjiang Bay R&D Building

Comparison and Selection of Multiple Construction Schemes for the Large-Span and Heavy-Load Transfer Truss

Effect of ECC layer thickness and reinforcement ratio on the load carrying capacity of steel‐reinforced composite beams

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