Experimental and numerical studies on seismic behavior of bonded and unbonded prestressed steel reinforced concrete frame beam

Xiong, Xiaolei; Yao, Gangfeng; Su, Xin

doi:10.1016/j.engstruct.2018.04.024

Cited by 21 publications

(5 citation statements)

References 12 publications

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“…The trilinear model was chosen as the constitutive model for prestressing tendons, as shown in Figure 2. The constitutive relation of the prestressing tendons can be described by Equation (1). Table 2 gives the mechanical properties of steel.…”

Section: Specimen Designmentioning

confidence: 99%

“…With the advancement of building engineering to super high-rise, massive loads, and wide spans [1], building structures not only pursue higher stories but also require a larger span, so conventional reinforced concrete (RC) structures and steel-reinforced concrete (SRC) structures have faced great challenges, because they cannot meet functional needs well. It is well-known that the application of prestressing technology to the frame system can make the structure realize a larger span [2], but it will also lead to many problems in the conventional frame system.…”

Section: Introductionmentioning

confidence: 99%

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Seismic Behaviors of Novel Steel-Reinforced Concrete Composite Frames Prestressed with Bonding Tendons

Ji,

Zhang,

Jiang

et al. 2023

Buildings

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To investigate the seismic behaviors of novel steel-reinforced concrete composite frames prestressed with bonding tendons (PSRCFs), 15 groups of PSRCF specimens were designed with the following main parameters: the cubic compressive strength of high-strength concrete (fcu), the axial compression ratio of frame columns (n), the slenderness ratio of frame columns (β), the steel ratio of angle steel (α), the span–height ratio of frame beams (L/hb), and the prestressing degree (λ). Based on the modified concrete constitutive model proposed by Mander and the prestressing effect applied by the cooling method, the finite element models of PSRCFs were established by using ABAQUS software, the static analysis on the frame structures under the combined actions of axial forces and horizontal loads was carried out, and the monotonic load–displacement curves were explored. By comparing with the skeleton curves obtained by the experimental hysteretic curves, the rationality of the modeling method was verified. The PSRCFs had good mechanisms of strong columns and weak beams. Based on this, the influences of different parameters on the seismic behaviors such as hysteretic curves, skeleton curves, stiffness degradations, energy dissipation capacities, and ductility of the specimens were investigated. The results show that the hysteretic curves of the PSRCFs are full and have no pinch phenomenon. The ultimate load and the stiffness degradation of specimens can be improved significantly by increasing α, and on the contrary, the ultimate load and stiffness degradation decreased by increasing β. The ductility of the specimens decreased gradually with the increasing β and n. The energy dissipation capacity of the specimens decreased with the increasing β. The trilinear model of the skeleton curves and the restoring force model of PSRCFS were established by statistical regression, which agree well with the numerically simulated results. These can provide theoretical support for the elastoplastic analysis on this kind of PSRCF structure.

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Section: Specimen Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic Behaviors of Novel Steel-Reinforced Concrete Composite Frames Prestressed with Bonding Tendons

Ji,

Zhang,

Jiang

et al. 2023

Buildings

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“…In addition, some scholars [23][24][25][26][27][28][29] analyzed the failure mode, crack development, and stiffness change of PSRC members and explored the deformation capacity of PSRC beams based on the stiffness change of the section. Based on the study of the deformation capacity of PSRC beams, scholars from various countries [30][31][32][33] studied the seismic performance of PSRC frames and analyzed the formation position and rotation ability of plastic hinges in PSRC frames. As prestressed technology improves crack resistance, it also affects the plastic deformation ability of the structure; therefore, to better apply the PSRC structure to practical engineering, many scholars [34][35][36][37][38][39] have studied the displacement ductility and plastic deformation ability of PSRC beams.…”

Section: Introductionmentioning

confidence: 99%

Plastic Properties of Prestressed High-Strength Steel Reinforced Concrete Continuous Beams

Wang,

Yang

2024

Applied Sciences

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In this paper, the plastic properties of prestressed high-strength steel reinforced concrete (PHSSRC) beams are studied, by performing static load tests on eight built-in Q460 and Q690 prestressed high-strength steel reinforced concrete continuous beams and one built-in Q355 prestressed steel reinforced concrete (PSRC) continuous beam. The design parameters of the specimens were the steel strength grade, the steel ratio, the comprehensive reinforcement ratio, and the stirrup ratio. The failure mode, load–deflection curve, internal force redistribution ability, curvature ductility, plastic hinge performance, and moment modification coefficient of continuous beams under the influence of various parameters were analyzed to measure the plastic performance of the continuous beams. These results show that after the plastic hinge is formed in the middle support and mid-span of the prestressed high-strength steel reinforced concrete continuous beam, the test beam eventually becomes a rotating mechanism and is destroyed with increasing load. The built-in high-strength steel can significantly improve the bearing capacity of the specimen, and the maximum increase in the bearing capacity is 37.3%. The specimen still has a high bearing capacity after reaching the ultimate bearing capacity. With a decrease in the steel ratio, the degree of internal force redistribution is deepened, the curvature ductility is improved, and the plastic performance is enhanced. Increasing the comprehensive reinforcement ratio and the stirrup ratio can improve the plastic performance of the specimen. The calculation formula of the equivalent plastic hinge zone length is proposed. The calculation formula of the moment modification coefficient, with the relative plastic rotation angle and relative compression zone height as independent variables, is established. When the relative plastic rotation angle is not greater than 0.829 × 10−5, the moment modification coefficient increases with increasing plastic rotation angle and is not greater than 0.37. In the range of 0.3~0.4, the moment modification coefficient decreases with increasing height of the relative compression zone.

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“…Prestressed concrete-encased steel (CES) frames, also called prestressed steel reinforced concrete (SRC) frames, could well realize the requirements of longspan, heavy-load and earthquake resistance of buildings due to the combined advantages of both CES frames and ordinary prestressed reinforced concrete (RC) ones, which have been widely studied and used in China in recent years (Fu et al, 2010;Kurosawa et al, 2019;Song et al, 2015;Xiong et al, 2018;Xu et al, 2020). In conventional prestressed CES frame structures, prestressed CES beams and concrete-encased cross-shaped steel columns were adopted as members (Fu et al, 2007;Mirza et al, 2004;Ricles et al, 1994), but since prestressing tendons and steel bars derived from beams could probably penetrate the flanges and webs of profile steels in joint zone, which come from CES columns, some defects including complicated details and shear capacity reduction in joint zone will commerce.…”

Section: Introductionmentioning

confidence: 99%

Study on shear capacity of prestressed composite joints with concrete-encased CFST columns

Wang

Zhu

Yang

et al. 2021

Advances in Structural Engineering

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Through assuming reasonable constitutive relation of materials, finite element analysis (FEA) models of joints consisting of prestressed concrete-encased steel beams and concrete-encased concrete filled steel tube (CFST) columns were established by soft ABAQUS, and the simulated results were compared with tested ones. On this basis, the nonlinear analysis on the total loading process was conducted, and the stress variation of concrete, profile steel skeleton, steel bar skeleton, and prestressing tendons were observed at yield, peak, and ultimate loads; the influence of axial compressive ratio, steel tube ratio, stirrup ratio, and prestressing level on lateral load-displacement curves at column top and shear force-shear angle in joint core were investigated, and the shear capacity formulae of joint core were developed. It could be concluded that, the lateral peak loads and shear capacity could be improved with the increase of axial compressive ratio, steel tube ratio, stirrup ratio, and prestressing levels in varying degrees, and the ductility of joints will reduce with the increase of axial compressive ratio. Additionally, the shear capacity calculated by proposed practical formula was a little lower than FEA results, which could keep the joints safety and could be used in engineering design.

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Experimental and numerical studies on seismic behavior of bonded and unbonded prestressed steel reinforced concrete frame beam

Cited by 21 publications

References 12 publications

Seismic Behaviors of Novel Steel-Reinforced Concrete Composite Frames Prestressed with Bonding Tendons

Seismic Behaviors of Novel Steel-Reinforced Concrete Composite Frames Prestressed with Bonding Tendons

Plastic Properties of Prestressed High-Strength Steel Reinforced Concrete Continuous Beams

Study on shear capacity of prestressed composite joints with concrete-encased CFST columns

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