Comparison of non-orthogonal smeared crack and plasticity models for dynamic analysis of concrete arch dams

Espandar, Radin; Lotfi, Vahid

doi:10.1016/s0045-7949(03)00083-x

Cited by 39 publications

(22 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The proposed model satisÿes the fracture energy conservation principle and has appropriate criteria for crack initiation and crack propagation [31,32]. Espandar and Lotÿ [33] compared the performance of the smeared crack model and the elasto-plastic model to consider the non-linear behavior of the dam body in three-dimensional space. In their work, the presented smeared crack model is non-orthogonal and the crack initiation criterion is maximum principal stress and orientation which can lead to over stressing.…”

Section: Introductionmentioning

confidence: 99%

Non‐linear behavior of mass concrete in three‐dimensional problems using a smeared crack approach

Mirzabozorg

Ghaemian

2004

Earthq Engng Struct Dyn

108

View full text Add to dashboard Cite

SUMMARYA smeared crack approach has been proposed to model the static and dynamic behavior of mass concrete in three-dimensional space. The proposed model simulates the tensile fracture on the mass concrete and contains pre-softening behavior, softening initiation, fracture energy conservation and strain rate e ects under dynamic loads. The validity of the proposed model has been checked using the available experimental results under static and dynamic loads. The direct and indirect displacement control algorithms have been employed under incremental increasing static loads. It was found that the proposed model gives excellent results and crack proÿles when compared with the available data under static loads. The Koyna Dam in India has been used to verify the dynamic behavior of the proposed model. It was found that the resulting crack proÿles were in good agreement with the available experimental results. Finally, the Morrow Point Dam was analyzed, including the dam-reservoir interaction e ects, to consider its non-linear seismic behavior. It was found that the resulting crack proÿles were in good agreement with the contour of maximum principal stresses and no numerical instability occurred during the analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Non‐linear behavior of mass concrete in three‐dimensional problems using a smeared crack approach

Mirzabozorg

Ghaemian

2004

Earthq Engng Struct Dyn

108

View full text Add to dashboard Cite

show abstract

“…This model has been successfully used for modeling the contraction joints in arch dams [6]. The former one itself can be divided into two major groups, i.e., the damage mechanics approach [29][30][31] and the smeared crack approach [32][33][34].…”

Section: Smeared Crack Modelmentioning

confidence: 99%

Response Surface Method for Material Uncertainty Quantification of Infrastructures

Hariri-Ardebili

Kolbadi²,

Noori

2018

Shock and Vibration

View full text Add to dashboard Cite

Recently, probabilistic simulations became an inseparable part of risk analysis. Managers and stakeholders prefer to make their decision knowing the existing uncertainties in the system. Nonlinear dynamic analysis and design of infrastructures are affected by two main uncertainty sources, i.e., epistemic and aleatory. In the present paper, the epistemic uncertainty is addressed in the context of material randomness. An old ultra-high arch dam is selected as a vehicle for numerical analyses. Four material properties are selected as random variables in the coupled dam-reservoir-foundation system, i.e., concrete elasticity, mass density, compressive (and tensile) strength, and the rock modulus of elasticity. The efficient Box-Behnken experimental design is adopted to minimize the required simulations. A response surface metamodel is developed for the system based on different outputs, i.e., displacement and damage index. The polynomial-based response surface model is subsequently validated with a large number of simulations based on Latin Hypercube sampling. Results confirm the high accuracy of proposed technique in material uncertainty quantification.

show abstract

“…However, most of the simulation works consider concrete arch dam to behave elastically, and consequently the cracking behavior and failure 2 Mathematical Problems in Engineering mode of concrete arch dam cannot be captured. Limited studies on the cracking behavior of concrete arch dam can be found in [9,10] in which the rock foundation is assumed to be rigid and in [11,12] in which the concrete arch dam is treated as a crown cantilever and is analyzed using the linear elastic fracture mechanics method. Moreover, to the best of our knowledge, the study on the influence of the ratio of mechanical properties of weak abutment and those of strong abutment on the cracking behavior and failure mode, which can provide an extensive knowledge of the structural failure of the concrete arch dam with nonuniform abutment in a general sense, has been rarely detailed in past research works.…”

Section: Introductionmentioning

confidence: 99%

Cracking Behavior of a Concrete Arch Dam with Weak Upper Abutment

Jing

Liu³

et al. 2017

Mathematical Problems in Engineering

View full text Add to dashboard Cite

The cracking behavior and failure mode of a 78 m high concrete double-curvature arch dam with weak upper abutment are investigated through performing cracking analysis. The mechanical behavior of concrete is simulated using a smeared crack model, in which a combination of the compression yield surface and the crack detection surface with a damaged elasticity concept is employed to describe the failure of concrete. The arch dam with practical mechanical properties of the upper and lower abutments is firstly studied with emphasis on its cracking behavior during overloading. Then, a comprehensive sensitivity analysis is carried out to investigate the influence of the ratio of the mechanical properties of upper abutment to those of lower abutment on dam failure with prime attention placed on the failure mode. Simulation results indicate the adopted smeared crack model is well-suited to the crack analysis of concrete arch dam. It is shown that cracking is localized around the interface between upper and lower abutments, which leads to a fast crack growth in the through-thickness direction of dam and finally causes the dam failure. Furthermore, the sensitivity analysis presents three types of failure modes corresponding to different ratio value, wherein Modes II and III should be avoided since the weak upper abutment plays a predominant role in the cracking and failure of concrete arch dam.

show abstract

Comparison of non-orthogonal smeared crack and plasticity models for dynamic analysis of concrete arch dams

Cited by 39 publications

References 7 publications

Non‐linear behavior of mass concrete in three‐dimensional problems using a smeared crack approach

Non‐linear behavior of mass concrete in three‐dimensional problems using a smeared crack approach

Response Surface Method for Material Uncertainty Quantification of Infrastructures

Cracking Behavior of a Concrete Arch Dam with Weak Upper Abutment

Contact Info

Product

Resources

About