Experimental Study of Steel Reinforced Concrete (SRC) Joints

Belda, Isaac Montava; Irles, R.; Pomares, Juan Carlos; González, Adrián Martínez

doi:10.3390/app9081528

Cited by 16 publications

(17 citation statements)

References 17 publications

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“…For this purpose, extensive research has been conducted on different joint shear models which could be used for old, non-ductile, and non-code-conforming RC beam-column joints as reported in the literature. Some are: Theiss [32], Anderson et al [33], Hassan and Moehle [34], Kim and LaFave [35], Lowes et al [36], Montava et al [37]. Some of the main characteristics of old and non-ductile joints are: (1) lack of sufficient shear reinforcement, and (2) inadequate lap splice length in the joint panel zone.…”

Section: Modeling Parameters For Rc Beam-column Jointsmentioning

confidence: 99%

Optimal FRP Jacket Placement in RC Frame Structures Towards a Resilient Seismic Design

2019

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This paper proposes an optimal plan for seismically retrofitting reinforced concrete (RC) frame structures. In this method, the columns are wrapped by fiber-reinforced polymer (FRP) layers along their plastic hinges. This technique enhances their ductility and increases the resiliency of the structure. Two meta-heuristic algorithms (i.e., genetic algorithm and particle swarm optimization) are adopted for this purpose. The number of FRP layers is assumed to be the design variable. The objective of the optimization procedure was to provide a uniform usage of plastic hinge rotation capacity for all the columns, while minimizing the consumption of the FRP materials. Toward this aim, a single objective function containing penalty terms is introduced. The seismic performance of the case study RC frame was assessed by means of nonlinear pushover analyses, and the capacity of the plastic hinge rotation for FRP-confined columns was evaluated at the life safety performance level. The proposed framework was then applied to a non-ductile low-rise RC frame structure. The optimal retrofit scheme for the frame was determined, and the capacity curve, inter-story drift ratios, and fragility functions were computed and compared with alternative retrofit schemes. The proposed algorithm offers a unique technique for the design of more resilient structures.

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Section: Modeling Parameters For Rc Beam-column Jointsmentioning

confidence: 99%

Optimal FRP Jacket Placement in RC Frame Structures Towards a Resilient Seismic Design

2019

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“…To build the wireframe model, the module APDL of Ansys (Version 16.2 and 17.2, Company: Ansys Inc., Canonsburg, Pennsylvania, United States, 2015), whose research license is held at the Department of Civil Engineering of the University of Alicante (Alicante, Spain). The intention was to simulate three prototypes (see Table 1): The experimental tests are detailed in Montava et al [17]. The first model, P03, aimed to describe reinforced concrete.…”

Section: Description Of the Modelmentioning

confidence: 99%

“…(a) (b) Figure 1. Prototypes P03 and P04 in the execution phase (A) and image of the tested prototypes P03 and P04 (B) [17].…”

Section: Appl Sci 2020 10 X For Peer Review 4 Of 19mentioning

confidence: 99%

“…The experimental tests to obtain the moment-curvature graphs were made in previous investigations [17]. Several experimental results were obtained for RC and SRC models.…”

Section: Introductionmentioning

confidence: 99%

“…The main objective of this investigation is to obtain a numerical model of a moment-curvature graph to be used in a simplified frame analysis, from post-critical behavior to collapse. References [17,18] have been used in order to validate the experimental data versus the numerical data.…”

Section: Introductionmentioning

confidence: 99%

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Equivalent Frame Model with a Decaying Nonlinear Moment-Curvature of Steel-Reinforced Concrete Joints

et al. 2019

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A numerical model for the analysis of frame structures that is capable of reproducing the behavior of reinforced concrete (RC) members and steel-reinforced concrete (SRC) members in all steps until collapse by simulating a reduced resistance capacity is presented in this work. Taking into account the solid models obtained in previous research that have been validated by experimental results, moment-curvature graphics were obtained in all steps: elastic, plastic, and post-critical to collapse. Beam models versus 3D models considerably simplified the calculation of frame structures and correctly described both the plastic and post-critical phases. The moment-curvature graph can be used in a simplified frame analysis, from post critical behavior to collapse.

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Analysis of the influence on structural seismic performance by the composite reinforcement method

Chu

et al. 2023

Structural Concrete

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This paper proposed three composite strengthening methods for repairing seismic‐damaged RC frames to restore their seismic capacity. Combined with the damage characteristics and failure mode of the frame under the earthquake action, the local strengthening of the column adopts the angle steel and gusset plate, and then the whole frame is strengthened by the inclined brace, the thin‐walled steel plate and the V‐shaped buckling restrained brace (BRB), respectively. Through the cyclic loading test, the main seismic indexes of the strengthened specimen, including hysteresis curve, skeleton curve, ductility, energy dissipation capacity, and stiffness degradation, are studied. The influence of different strengthening methods on the seismic performance of the seismic‐damaged specimens is analyzed. The results show that the seismic performance of strengthened specimens is significantly improved, and the bearing capacity, ductility, and energy dissipation capacity are increased by 2.58–5.57, 1.05–1.24, and 7.67–15.87 times, respectively. The thin‐walled steel plate shear wall and the inclined brace are destroyed at first during loading to effectively delay the premature destruction of the main frame. The composite strengthening method makes the original frame realize the failure mechanism of “strong joint weak member, strong column weak beam” under strong earthquake action. The strengthened specimen satisfies the seismic requirement and has good seismic performance. The seismic performance of the frame strengthened with the V‐shaped BRB is better than that of the other two strengthening methods. Based on the test date, the formula for calculating the shear‐bearing capacity of the beam end is presented.

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Experimental Study of Steel Reinforced Concrete (SRC) Joints

Cited by 16 publications

References 17 publications

Optimal FRP Jacket Placement in RC Frame Structures Towards a Resilient Seismic Design

Optimal FRP Jacket Placement in RC Frame Structures Towards a Resilient Seismic Design

Equivalent Frame Model with a Decaying Nonlinear Moment-Curvature of Steel-Reinforced Concrete Joints

Analysis of the influence on structural seismic performance by the composite reinforcement method

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