Experimental study and numerical analysis on seismic behavior of composite <scp>RCS</scp> frames

Wei, Li; Xiong, Jingang; Wu, Lingjie; Yang, Kejia

doi:10.1002/suco.201900068

Cited by 9 publications

(4 citation statements)

References 21 publications

(37 reference statements)

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“…The reinforcements adopted T3D2 unit, ground adopted R3D4 unit, and other parts adopted C3D8R unit. 39 The grid sizes of reinforcement, CGF, CFC infill, and ground were 10, 20, 20, and 80 mm respectively. The grid size of steel beam, LS, HJ, and cushion block were 40 mm.…”

Section: Fe Modelmentioning

confidence: 99%

Experimental and numerical investigations on interaction between reinforced‐concrete grid frame and ceramsite foam concrete infill

Chen

2023

Structural Concrete

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Experimental and numerical studies were conducted to investigate interaction between reinforced‐concrete grid frame (CGF) and ceramsite foam concrete (CFC) infill. In the experiments, compressive tests were performed on the CGF and RC grid frame filled with the CFC which forms a composite wall, namely CGFW. To investigate the mechanical properties of the CGFW and the interactions between the CGF and CFC infill, the failure modes, integral stiffness, local strains, and load distribution coefficients of the composite wall were analyzed. The experimental results indicated that the CFC infill could uniformly transmit loads and significantly improve the bearing capacity and vertical stiffness of the CGFW while reducing the ductility of the composite wall. The load distribution coefficients of the CFC infill were stable at 0.51 ± 0.06 before peak load and damage evolutions in concrete columns were effectively alleviated due to obvious interactions between the CGF and CFC infill. To evaluate the interaction mechanisms of the two, numerical analysis was carried out by changing the sizes of central grid, opening rates, and reinforcement ratios of the composite walls. The finite element model with plastic damage constitutive of concrete was calibrated by comparing the experimental results. The numerical results indicated that the interaction between the CGF and CFC infill was insensitive to changes in grid sizes, and the interaction between the two was significantly different with the same reinforcement method of frame beams and columns. In addition, the CFC infill played an important role in the stability of CGF as the opening rate significantly affected the mechanical properties of the CGFW, and a stable path of load transfer was the key factor to ensure the interaction between the CGF and CFC infill.

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Section: Fe Modelmentioning

confidence: 99%

Experimental and numerical investigations on interaction between reinforced‐concrete grid frame and ceramsite foam concrete infill

Chen

2023

Structural Concrete

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“…In addition to experimental research, several studies focused on the numerical simulation of RCS connection behavior using the finite element method and platforms such as ABAQUS (2013) and ANSYS (2013), for example, Refs: (Azad et al, 2021; Jafari et al, 2020; Li et al, 2020; Noguchi and Uchida, 2004; Tao et al, 2021). After developing a finite element model of the RCS connection and validating the model with the results of experimental tests, these studies proposed new connection details, evaluated the performance of new connections, and provided suggestions to enhance seismic performance (Alizadeh et al, 2013; Bakhtiari Doost et al, 2022; Li et al, 2022a; Madandoust et al, 2018; Nguyen et al, 2019; Zibasokhan et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Quantification of the seismic design coefficients for composite special moment frames with reinforced concrete columns and steel beams

Tavasoli Yousefabadi,

Kazemi

2023

Advances in Structural Engineering

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This paper explores the performance of the reinforced concrete column and steel beam (RCS) structural system at the frame-level, with a focus on evaluating the seismic design coefficients ( R-factor, Ω0, and C d) using the FEMA-P695 methodology. The RCS system offers a more efficient and cost-effective solution compared to conventional steel and RC moment-resisting frames, with higher damping and lateral stiffness of RC columns and greater energy dissipation capacity of steel beams. Although several experimental and numerical studies have evaluated the performance of the RCS system, most of them have focused on the connection-level. In this study, 32 archetypes are designed with varying building height, span length, concrete strength, gravity load level, seismic load level, and column-beam strength ratio. Nonlinear analytical models are developed for the selected archetypes, and the modeling assumptions are validated through five distinct experimental tests. The models are then subjected to both static pushover and response history analyses, and the seismic design coefficients of the archetypes are evaluated and discussed based on the FEMA-P695 methodology. The results indicate that the design requirements of the RCS system are efficient, providing a high safety margin. However, the level of conservatism is found to be excessively high. Thus, it is possible to use a larger R-factor in the design process or make some relaxations in the design requirements related to this structural system. While further research should be carried out to validate the results, this study shows that as long as the R-factor is less than R = 10, the building can be deemed sufficiently safe for seismic loadings.

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“…Latour et al [12] conducted experimental and numerical research on beam-column joints with demountable friction dampers, reporting a satisfactory hysteretic performance for both connection methods. Li et al [13] explored the impact of steel-beam stiffness on the ductility and collapse resistance of reinforced concrete steel frames, revealing its significance. Liu et al [14] proposed a buckling-restrained joint that transferred shear forces to components outside the web but cautioned about potential adverse effects on energy dissipation if tearing occurred at the joint.…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of Demountable Reinforced Concrete (RC) Beam-to-Column Joints with Damage-Control Fuses

Li,

Fan,

Jiang

et al. 2023

Buildings

Self Cite

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In this paper, a new type of assembled RC beam–column joint with a beam-end steel cover-plate connection is proposed to achieve seismic toughness and damage control of the joint. Energy-dissipation plates with different structural forms are proposed, and a series of seismic performance indexes of the joints are calculated and analyzed by using the finite element method. The energy-dissipation plate with an arc notch can reach the yield condition faster, and the ultimate bearing capacity of the joint reaches the maximum. The bending design of energy-dissipation plates is carried out by calculating the demand bending moment, and energy-dissipation plates of different structural forms are simulated and verified. The results show that the proposed design formula can ensure that the bending moment at the beam end still maintains elastic deformation when the energy-dissipation plate yields. The important parameters affecting the bending moment of the weakened part in the middle of the energy-dissipation plate are analyzed. Finally, this paper also analyzes the important parameters affecting the seismic performance of the joints. The results show that the seismic performance of the newly assembled RC beam–column joints proposed in this paper is better than that of cast-in-place joints. Increasing the longitudinal reinforcement ratio appropriately can greatly improve the ultimate bearing capacity and ductility of the joints. Increasing the thickness of the energy-dissipation plate, increasing the strength of the energy-dissipation plate, increasing the axial compression ratio of the column, increasing the strength of the concrete, and increasing the strength of the shear web can improve the ultimate bearing capacity of the joints but also reduce their ductility. Under different axial compression ratios, the strain in the core area of the joints is low, and the compressive damage of the concrete is zero, which verifies the effectiveness of the damage-control design of the proposed model.

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Experimental study and numerical analysis on seismic behavior of composite RCS frames

Cited by 9 publications

References 21 publications

Experimental and numerical investigations on interaction between reinforced‐concrete grid frame and ceramsite foam concrete infill

Experimental and numerical investigations on interaction between reinforced‐concrete grid frame and ceramsite foam concrete infill

Quantification of the seismic design coefficients for composite special moment frames with reinforced concrete columns and steel beams

Seismic Behavior of Demountable Reinforced Concrete (RC) Beam-to-Column Joints with Damage-Control Fuses

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