Simulation of Temperature and Stress Fields during RCC Dam Construction

Luna, Ronaldo; Wu, Yong

doi:10.1061/(asce)0733-9364(2000)126:5(381)

Cited by 45 publications

(24 citation statements)

References 3 publications

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“…program begin 2. initialize the population P 3. send the individuals to the slaves 4. compute the values of E Cr (X) 5. receive the values of E Cr (X) 6.…”

Section: Parallel Genetic Algorithmmentioning

confidence: 99%

“…Each height implies a corresponding number of lifts, which is estimated according to Equation (5). Thus, the total number of lifts for each height is given by, respectively: N l ∈ {8; 4; 3; 2; 2; 2; 2; 1} (17)…”

Section: Design Variablesmentioning

confidence: 99%

“…Such models may range from simplified approaches to sophisticated thermo-chemo-mechanical models. One can refer, among others, to the works of Cervera et al [4], Luna and Wu [5], Lackner and Mang [6], Fairbairn et al [7] and Azenha et al [3]. A recent survey of these models can be found in [8].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Mass Concrete Construction Using a Twofold Parallel Genetic Algorithm

et al. 2018

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This paper presents a solution strategy, based on a parallel Genetic Algorithm (GA), to optimize the construction of massive concrete structures. The optimization process aims at minimizing the construction cost, considering the following design variables: the concrete mixes, the placing temperature, the height of the lifts, and the time intervals between placing the lifts. The cracking tendency is taken into account by a penalty scheme imposed to the fitness function of the GA. A thermo-chemo-mechanical model is used to calculate the transient fields of hydration, temperature, stress, strain, and cracking tendency. This model is implemented in a finite element code that is, in turn, parallelized. To demonstrate the efficiency of the proposed methodology, the simulation of the construction of a structure similar to the real thick foundation of an industrial building is presented. It shows that the optimization procedure here presented is feasible and is ready to be used in real engineering applications.

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“…program begin 2. initialize the population P 3. send the individuals to the slaves 4. compute the values of E Cr (X) 5. receive the values of E Cr (X) 6.…”

Section: Parallel Genetic Algorithmmentioning

confidence: 99%

Section: Design Variablesmentioning

confidence: 99%

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Optimization of Mass Concrete Construction Using a Twofold Parallel Genetic Algorithm

et al. 2018

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“…RCC dams consist of concrete placed at a lower water-to-cement ratio as compared to conventional concrete with the aid of compaction equipment and methodologies normally employed for earth-fill placement. RCC has gained worldwide acceptance as an alternative to conventional concrete in dam construction due to the construction advantages and proved performance [1]. According to Dunstan (2002) RCC dams continue their development worldwide and by the end of (2001) there were (232) complete large RCC dams and a further 31 were under construction, by the end of 2011 over 500 large RCC dams were developed in the world [2].…”

Section: Introductionmentioning

confidence: 99%

A comparative study of physical and chemical properties of different pozzolanic materials used for roller compacted concrete RCC dams

Malkawi

Shatnawi²,

Malkawi

2017

MATEC Web Conf.

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Abstract. This paper addresses the feasibility and the efficiency of using Natural Pozzolan and/or Rock flour in Roller Compacted Concrete (RCC) gravity dams. For this purpose, five identical mortar trial mixes were prepared using five different supplementary materials, i.e., fly ash produced in South Africa (proven to be effective in RCC construction), fly ash produced in Turkey, Jordanian natural pozzolan, Saudi natural pozzolan, and rock flour from Mujib Dam basalt quarry. The physical and chemical properties of these pozzolanic materials were determined. The effectiveness of each one of these mineral admixtures used as a cement replacement material in controlling alkali silica reaction are studied and analyzed. Correlations were made between the mechanical properties for the five proposed mixes and a control mix using the Jordanian Portland Cement. The results demonstrate that the performance of Natural Pozzolana and/or rock flour as compared with that of fly ash and other pozzolanic material is very satisfactory and can be effectively used in RCC construction.

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“…The main di erence between RCC and CC is the mixture consistency and the method of consolidation [1]. In comparing RCC with CC, less water and consequently less cement are required to produce an equivalent ratio of water to cement [2]. The temperature control of RCC arch dam is di erent from that of conventional concrete arch dam and gravity RCC dam because of material and construction behaviour.…”

Section: Introductionmentioning

confidence: 99%

Influence of the different pipe cooling scheme on temperature distribution in RCC arch dams

Xie

Chen

2005

Commun. Numer. Meth. Engng.

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SUMMARYBased on the physical properties of rolled compacted concrete (RCC) arch dam, three-dimensional ÿnite element relocating mesh method is used to simulate the temperature distribution for di erent pipe cooling scheme in the RCC arch dam during construction and operation period. Many factors have also been considered, such as thermal adiabatic rise of temperature with age, the process of placement by layer, work suspension in summer, the change of air temperature, the method of superÿcial thermal insulation and water storage in temperature ÿeld. The calculated results show that the cooling e ect was notable and the maximum temperature decreased greatly at the centre of the dam when the layout range of pipe cooling changed from El.2299-2327 m to El.2275-2293 m.

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Simulation of Temperature and Stress Fields during RCC Dam Construction

Cited by 45 publications

References 3 publications

Optimization of Mass Concrete Construction Using a Twofold Parallel Genetic Algorithm

Optimization of Mass Concrete Construction Using a Twofold Parallel Genetic Algorithm

A comparative study of physical and chemical properties of different pozzolanic materials used for roller compacted concrete RCC dams

Influence of the different pipe cooling scheme on temperature distribution in RCC arch dams

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