Prediction of Hysteretic Moment Rotation Relation of Reinforced Concrete Elements under Variation of Axial Force

Ristic, Danilo; Yamada, Y.; Iemura, Hirokazu

doi:10.2208/proee1957.18.329

Cited by 3 publications

(4 citation statements)

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“…30 The parabola model was adopted using the Ristic strength criterion, where the tension effect and the decrease in compressive stress were not considered. 34 The comparison of the typical crosssectional properties between the simplified model and the simplified model with fibers are listed in Table 4. The rebar in the fibers for sections such as the girder and pier cap caused the sectional properties calculated from the simplified model with fibers to be slightly larger than those calculated by the simplified model.…”

Section: Simplified Fem Modelmentioning

confidence: 99%

“…Figure 12 shows that the confinement effect of the filled concrete is considered in the concrete's stress–strain curve and the filled concrete's material nonlinearity is measured by the curve 30 . The parabola model was adopted using the Ristic strength criterion, where the tension effect and the decrease in compressive stress were not considered 34 . The comparison of the typical cross‐sectional properties between the simplified model and the simplified model with fibers are listed in Table 4.…”

Section: Establishment Of Bridge Femmentioning

confidence: 99%

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Nonlinear dynamic response analysis of a hybrid concrete‐filled steel tubular truss lightweight bridge under strong earthquakes

Huang,

Chen,

et al. 2023

Earthquake Engineering and Resilience

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Concrete‐filled steel tubular (CFST) trusses have seen recent development and application in bridges found in mountainous regions with deep valleys, and especially in seismic zones. In this study, a hybrid CFST truss lightweight bridge was selected as the research object. This bridge is composited of CFST composite truss girders (superstructure) and CFST lattice piers (substructure). Two different finite element models (FEM) for nonlinear seismic response analysis, one is detailed model and the other is simplified model, were established. By comparing with the detailed model, the results of the shaking table test as well as the real bridge test, the simplified model was found to be accurate. Considering the CFST columns' edge strain, the most unfavorable input direction of horizontal ground motion was perpendicular to the connection line of the bearings at both ends of the main girder. Also, the simultaneous influence of vertical ground motion and horizontal ground motion needs to be taken into consideration. By increasing the intensity of input ground motion, the yielding order of CFST lattice piers and its effect on the seismic response were also discussed. Results indicated that the bridge was in the elastic stage for the designed seismic ground motion. After the CFST lattice piers reached the plastic stage, the displacement and in‐plane bending moment had larger amplification coefficients compared to the increase coefficient of the input ground motion, while had a much smaller axial force amplification coefficient. Moreover, the in‐plane bending moment had a larger amplification coefficient in high piers compared to short piers.

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Section: Simplified Fem Modelmentioning

confidence: 99%

Section: Establishment Of Bridge Femmentioning

confidence: 99%

Nonlinear dynamic response analysis of a hybrid concrete‐filled steel tubular truss lightweight bridge under strong earthquakes

Huang,

Chen,

et al. 2023

Earthquake Engineering and Resilience

View full text Add to dashboard Cite

show abstract

“…The level of drop of shear stresses depends on the aggregate interlock and friction at the crack surface. For reinforcement springs, the model presented by Ristic et al [14] is used as shown in Fig. 3(c).…”

Section: The Applied Element Modelling (Aem) Of Rc Framesmentioning

confidence: 99%

Seismic Design Effect on the Progressive Collapse Potential of R.C. Frames

Beshara,

El-Mahdy,

Mahmoud

et al. 2019

Engineering Research Journal (Shoubra)

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Progressive collapse potential studies are performed on two-dimensional R.C frames with different reinforcement details under the effect of interior column removal. This study aims to determine the effect of seismic detailing on the structural resistance and behavior of RC frames during progressive collapse event. The R.C frames and reinforcement details would be designed according to Egyptian Code ECP-203 [1]. In this study, two prototype frames were executed from concrete structure and were designed. The first frames F1 is designed with non-seismic reinforcement detail. The second frame F2 is designed with seismic rebar detail. Nonlinear software, used for modeling R.C frames, is extreme loading for structures (ELS). The numerical technique is based on the applied element method with suitable stress-strain relations for concrete and steel. It is found that frame with seismic detail improve the frame resistance against progressive collapse event by 40-45% more than the non-seismic detail in all response stages. The load-steel strain curves and the cracking patterns are also compared for the two frames.

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“…The plot presented in Figure 4(a) represents the numerical simulation of the compression tests in the cubic samples using the calibrated constitutive model for concrete. The Ristic constitutive model [25] is implemented in ELS in order to characterize the behaviour of the reinforcement bars. Using this model, the tangent stiffness in a rebar spring depends on the current strain, the loading status (loading or unloading) and the previous loading history which controls the Bauschinger's effect.…”

Section: Numerical Simulation Of the Blast Effectsmentioning

confidence: 99%

Numerical Simulation of Blast Effects on Fibre Grout Strengthened RC Panels

Cismasiu

Rebelo

Lúcio

et al. 2017

KEM

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The present paper aims to examine the potential of the Applied Element Method (AEM) in simulating the blast effects in RC panels. The numerical estimates are compared with the results obtained in an experimental campaign designed to investigate the effectiveness of fibre grout for strengthening full scale RC panels by comparing the effects that a similar blast load produces in a reference and the strengthened panel. First, a numerical model of the reference specimen was created in the software Extreme Loading for Structures and calibrated to match the experimental results. With no further calibration, the fibre reinforced grout strengthening was added and the resulting numerical model subjected to the same blast load. The experimental blast effects on both reference and strengthened panels, despite the lack of high speed measurement equipment (pressure, strains and displacements sensors), compare well with the numerical estimates in terms of residual and maximum displacements, showing that, once calibrated, the AEM numerical models can be successfully used to simulate blast effects in RC panels.

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Prediction of Hysteretic Moment Rotation Relation of Reinforced Concrete Elements under Variation of Axial Force

Cited by 3 publications

References 0 publications

Nonlinear dynamic response analysis of a hybrid concrete‐filled steel tubular truss lightweight bridge under strong earthquakes

Nonlinear dynamic response analysis of a hybrid concrete‐filled steel tubular truss lightweight bridge under strong earthquakes

Seismic Design Effect on the Progressive Collapse Potential of R.C. Frames

Numerical Simulation of Blast Effects on Fibre Grout Strengthened RC Panels

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