Re-Formulation of Spatially Averaged Rc Constitutive Model With Quasi-Orthogonal Bi-Directional Cracking

Maekawa, Koichi; Fukuura, Naoyuki

doi:10.2208/jscej.1999.634_157

Cited by 15 publications

(5 citation statements)

References 15 publications

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“…Subsequently, we used the Maekawa model 9 to characterize the nonlinear material properties of the RC walls. However, the response results were mostly within the elastic range.…”

Section: Analytical Conditionsmentioning

confidence: 99%

Uncertainty quantification of seismic response of nuclear reactor building using a three‐dimensional finite element model

Choi

Nishida

et al. 2022

Earthquake Engineering and Resilience

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After the 2011 Fukushima accident, seismic regulations for nuclear power plants (NPPs) in Japan have been strengthened to include countermeasures beyond design‐basis events. Therefore, the importance of seismic probabilistic risk assessments is a topic that deserves attention. Generally, uncertainty quantification has been a crucial undertaking to assess the fragility of NPP buildings. This study aims to quantify realistic uncertainties using a three‐dimensional (3D) finite element (FE) model to reflect the obtained results to the conventional simple sway‐rocking (SR) model, and to develop a seismic fragility assessment method that considers 3D effects. As a first step, a 3D FE model was developed, and a seismic response analysis was performed to evaluate the seismic response of the buildings. For comparison, a seismic response analysis using the conventional SR model was performed. For input ground motions, 200 types of simulated seismic ground motions, generated using fault‐rupture models were adopted. As a second step, two types of uncertainties are evaluated for uncertainty quantification: uncertainty for input seismic ground motion and that due to different locations of equipment installed on a floor. As a third step, to reflect the 3D effect on the uncertainty of the conventional SR model, were investigated the median and logarithm standard deviation of the response ratio (3D FE/SR) of the maximum acceleration of the two models. The results of epistemic uncertainty tended to increase with the increasing elevation level and the epistemic uncertainty result in the basement floor, where important equipment was installed, was relatively small. By reflecting this epistemic uncertainty into the conventional SR model, a more realistic fragility assessment that considers the 3D effect is expected by applying this result as epistemic uncertainty of the SR model of the fragility assessment.

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“…Subsequently, we used the Maekawa model 9 to characterize the nonlinear material properties of the RC walls. However, the response results were mostly within the elastic range.…”

Section: Analytical Conditionsmentioning

confidence: 99%

Uncertainty quantification of seismic response of nuclear reactor building using a three‐dimensional finite element model

Choi

Nishida

et al. 2022

Earthquake Engineering and Resilience

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“…To construct the multi-directional cracking model in a plane stress field, two orthogonal coordinate systems (x 1 -y 1 , x 2 -y 2 ) are introduced into the non-orthogonal four-way directional cracking model of an in-plane stress field Maekawa and Fukuura, 1999). The cracks that occur in the 2D stress field are modeled in up to four directions, in relation to the normal direction of the cracks in each coordinate axis as shown in Figure 11.6.…”

Section: (A)mentioning

confidence: 99%

Nonlinear Modeling of 3D Structural Reinforced Concrete and Seismic Performance Assessment

Maekawa

Fukuura

2013

Infrastructure Systems for Nuclear Energy

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“…In this study, the model in the shear direction was designed based on the average shear stress-strain model in cracked concrete proposed by Maekawa et al (1999).…”

Section: Three Dimensional Concrete Modelmentioning

confidence: 99%

“…For these elements, the following tension stiffening model was used: Coefficient c was set to 0.8 in this study because the studs might have lesser bonding properties (An et al 1997). Stud stress was calculated using the trilinear average stress-strain relationship proposed by Maekawa and Fukuura (1999). Figure 16 shows the computed load-displacement curves.…”

Section: Effect Of Studs and Failure Mechanismmentioning

confidence: 99%

3D Nonlinear Punching Shear Simulation of Steel-Concrete Composite Slab

Takahashi

Sato

Konno

et al. 2005

ACT

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In this study, a model for the interface between a concrete slab and a steel plate in composite slabs with studs is developed through a bending test for composite beams. A smeared reinforcing stud model is also implemented to consider the shear-reinforcing effect of taller studs. 3D nonlinear finite element analysis using the model for the interface and the reinforcing stud model developed in this study is found to predict punching shear behavior of composite slabs.

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Re-Formulation of Spatially Averaged Rc Constitutive Model With Quasi-Orthogonal Bi-Directional Cracking

Cited by 15 publications

References 15 publications

Uncertainty quantification of seismic response of nuclear reactor building using a three‐dimensional finite element model

Uncertainty quantification of seismic response of nuclear reactor building using a three‐dimensional finite element model

Nonlinear Modeling of 3D Structural Reinforced Concrete and Seismic Performance Assessment

3D Nonlinear Punching Shear Simulation of Steel-Concrete Composite Slab

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