Numerical analysis of the causes of face slab cracks in Gongboxia rockfill dam

Wang, Zijian; Liu, Sihong; Vallejo, Luis E.; Wang, Liujiang

doi:10.1016/j.enggeo.2014.07.019

Cited by 50 publications

(21 citation statements)

References 5 publications

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“…In the process of casting, the concrete panel is in high risk to yield cracks due to uneven settlement, hydration reaction, and dry shrinkage deformation [1][2][3]. ese cracks can cause seepage and remove fine particles in the panel, which seriously impacts the structural stability, reduces the antiseepage performance and durability of the concrete panel, and becomes a great threat to the safety of the dam [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance and Numerical Simulation of Basalt Fiber Reinforced Concrete (BFRC) Using Double‐K Fracture Model and Virtual Crack Closure Technique (VCCT)

Yong

Sun

Cao

et al. 2019

Advances in Civil Engineering

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This paper mainly investigates the fracture parameters of Basalt Fiber Reinforced Concrete (BFRC) with various fiber lengths and dosages using Double-K fracture model. The model was developed by fracture criterion using ABAQUS Virtual Crack Closure Technique (VCCT), and the results of the model and experiments were compared. The basalt fiber with length of 6 mm and 12 mm was added into concrete in the dosage of 0.0%, 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% by volume of concrete, respectively. Concrete specimens were cast into three dimensions, i.e., 60 mm × 180 mm × 480 mm, 80 mm × 240 mm × 640 mm, and 100 mm × 300 mm × 800 mm. Then, three-point bending test was conducted on precast-notched beams. The load versus cracking mouth opening displacement (P-CMOD curve) was developed in order to evaluate cracking and breaking load. The initial fracture toughness and unstable fracture toughness were derived from the Double-K fracture model aimed to optimize the fiber length and dosage. The results showed that the initial fracture toughness and unstable fracture toughness increased first and then decreased with the increase in fiber dosage, and basalt fiber with length of 6 mm and dosage of 0.2% performed the best toughening effect on concrete. The comparison results showed that numerical simulation can better simulate the initiation and propagation of BFRC fractures and achieve the dynamic propagation process of fractures.

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Section: Introductionmentioning

confidence: 99%

Mechanical Performance and Numerical Simulation of Basalt Fiber Reinforced Concrete (BFRC) Using Double‐K Fracture Model and Virtual Crack Closure Technique (VCCT)

Yong

Sun

Cao

et al. 2019

Advances in Civil Engineering

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“…Therefore, it is capable of providing high precision simulation at relatively low computational cost. The dual-mortar approach is a promising method in multi-body contact analysis [24][25][26].In the numerical analysis of CFRDs, the contact is mainly modelled by interface element methods [27][28][29][30]. In real CFRD projects, it is usually found that there are large relative displacement and separation between the concrete face and the cushion layer [9].…”

mentioning

confidence: 99%

“…In the numerical analysis of CFRDs, the contact is mainly modelled by interface element methods [27][28][29][30]. In real CFRD projects, it is usually found that there are large relative displacement and separation between the concrete face and the cushion layer [9].…”

mentioning

confidence: 99%

Three‐dimensional numerical analysis of concrete‐faced rockfill dam using dual‐mortar finite element method with mixed tangential contact constraints

Zhou

Zhang

Peng³

et al. 2016

Num Anal Meth Geomechanics

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SUMMARYConcrete-faced rockfill dam (CFRD) is a popular alternative to traditional dam types in the last two decades. The modelling of CFRD involves complex multi-body contact and strong geometry and material nonlinearities. We present a numerical approach for the modelling of CFRDs in this paper. Based on the dual-mortar finite element method, the presented approach considers different parts of rockfill and all concrete slabs as independent deformable continuum. The multi-body contacts are modelled using Lagrange multipliers with a weak form segment-to-segment contact strategy. To alleviate instability induced by strong geometry nonlinearity in the slab-slab contact, we propose a mixed type of constraints for the tangential contact. A general transformation scheme is introduced to simplify the implementation of contact constraints. Three-dimensional analysis of Tianshengqiao-1 CFRD is performed. The nonlinear and time-dependent deformation of the rockfill is considered. We study the influence of the rockfill deformation on the reliability of the concrete face. Three major concerns of the face, that is, the axial compression, the slab-slab separation and the face-rockfill separation, are discussed in detail. The numerical results are compared with data from in-situ observation.

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“…[1]. Some cracks emerge in construction period and some are formed during the operating period [2]. Cracks can not only affect the building appearance, but also can bring about a series of serious diseases, like leakage dissolution, environment water erosion, freeze-thaw damage and steel corrosion.…”

Section: Introductionmentioning

confidence: 99%

DSC and curing kinetics study of epoxy grouting diluted with furfural -acetone slurry

Yin

Liu

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The use of furfural-acetone slurry as active diluents of Bisphenol-A epoxy resin (DGEBA) groutings has been studied by dynamic and non-isothermal DSC for the first time.Curing kinetics study was investigated by non-isothermal differential scanning calorimetries at different heating rates. Activation enery (E a ) was calculated based on Kissinger and Ozawa Methods, and the results showed that E a increased from 58.87 to 71.13KJ/mol after the diluents were added. The furfural-acetone epoxy matrix could cure completely at the theoretical curing temperature of 365.8K and the curing time of 139mins, which were determined by the kinetic model parameters.

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Numerical analysis of the causes of face slab cracks in Gongboxia rockfill dam

Cited by 50 publications

References 5 publications

Mechanical Performance and Numerical Simulation of Basalt Fiber Reinforced Concrete (BFRC) Using Double‐K Fracture Model and Virtual Crack Closure Technique (VCCT)

Mechanical Performance and Numerical Simulation of Basalt Fiber Reinforced Concrete (BFRC) Using Double‐K Fracture Model and Virtual Crack Closure Technique (VCCT)

Three‐dimensional numerical analysis of concrete‐faced rockfill dam using dual‐mortar finite element method with mixed tangential contact constraints

DSC and curing kinetics study of epoxy grouting diluted with furfural -acetone slurry

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