Finite element simulation of prevention thermal cracking in mass concrete

Xu, Juncai; Shen, Zhenzhong; Yang, Song; Xie, Xin; Yang, Zhengyu

doi:10.1504/ijcsm.2019.102691

Cited by 13 publications

(9 citation statements)

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“…Moreover, the test setup with high costs and measurement strategy may have a great impact on the accuracy of test results. Over the past decades, the FE technique has become increasingly popular in academic researches [17][18][19][20] because it can solve the problems that cannot be realized in engineering field. us, the finite element software was adopted to simulate the deflections of airport pavement structures under varied working conditions in this study.…”

Section: Finite Element Simulationmentioning

confidence: 99%

Refinement of a Deflection Basin Area Index Method for Rigid Pavement

Jin

Shi

et al. 2021

Shock and Vibration

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The accuracy of the prediction and reliability of the deflection basin area index method for rigid pavement heavily depend on the sensor layout scheme and the calculation theory. A total of 154 groups of deflection data were generated by the finite element software in different conditions, and the simulated results were in good agreement with the analytical solutions of thin plates on elastic foundation. The accuracy of several types of deflection basin area index methods was assessed with the database of pavement deflection results. It is found that, apart from densifying the distal sensor layouts locally, replacing the deflection value of a specific point with the average of all measured points in the deflection basin area index was also an effective measure to improve the back-calculation accuracy of pavement structural parameters up to 40%. Finally, a new deflection basin area index method was proposed based on the deflection database with the regression analysis. Comparisons between the theoretical calculations of several models and the practical deflection data of an airport in northern China revealed that the newly proposed method performs better on the back-calculation accuracy and efficiency, which can provide a valuable guideline for the practical engineering in the design.

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Section: Finite Element Simulationmentioning

confidence: 99%

Refinement of a Deflection Basin Area Index Method for Rigid Pavement

Jin

Shi

et al. 2021

Shock and Vibration

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“…However, in actual engineering applications, it is often limited by the surrounding environment, and sometimes it is impossible to measure the temperature on the two sides separately. Therefore, for the case where the temperature on only one boundary can be measured, this paper also gives the calculation path heuristic information value methods [9]. If the measuring points cannot be arranged on the y = 0 boundary, the measuring points can only be arranged on the x = 0.1 boundary, Then, the path heuristic information value on the y = 0 boundary:…”

Section: Improvement Of Heuristic Information Valuementioning

confidence: 99%

Thermal control system based on ant colony algorithm

Zhang¹,

Zhou²

2021

THERM SCI

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In order to improve the accuracy and speed of solving the inverse problem of source-seeking heat conduction, the paper proposes a correlation-based ant colony optimization algorithm for the inverse problem of source-seeking heat conduction based on the characteristics of the influence of the heat source position on the boundary temperature distribution in the heat conduction problem. This method is used to construct the corresponding heuristic information value for each co-ordinate of the heat source location, which can reflect the degree of similarity between the temperature curve of the calculated measuring point and the temperature curve of the real measuring point, namely the correlation degree. The ant colony optimization algorithm the medium path selection mechanism and the structure of the objective function have been improved. The paper replaces the actual experiment with numerical calculation obtain the temperature of the measuring point, and performs computer programming experiment on the inverse problem. The calculation results show that the calibration method of this heuristic information value and the objective function the construction method can distinguish the quality of the path well, thereby increasing the speed of the ant colony converging to the best path. The computational efficiency is improved by 18-60% compared with the ant colony algorithm that does not consider the correlation.

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“…19 However, the challenge lies in mitigating the temperature rise due to concrete hydration heat and enhancing the material's resistance to cracking during construction. 20,21 Numerous admixtures have been found to reduce drying shrinkage and improve the mechanical properties of hydraulic concrete. [22][23][24][25][26] Furthermore, hydraulic concrete demonstrates exceptional resistance to erosion and abrasion, contributing to its superior performance.…”

Section: Introductionmentioning

confidence: 99%

“…Hydraulic concrete, a cement‐based material, has widespread applications in hydropower projects such as water retention, power generation, and sand discharge applications 19 . However, the challenge lies in mitigating the temperature rise due to concrete hydration heat and enhancing the material's resistance to cracking during construction 20,21 . Numerous admixtures have been found to reduce drying shrinkage and improve the mechanical properties of hydraulic concrete 22–26 .…”

Section: Introductionmentioning

confidence: 99%

The mechanics and durability of rubber fiber hydraulic concrete on laboratory

Zhang,

Liu,

Luo

et al. 2023

Engineering Reports

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This study delves into the mechanical and durability properties of rubber fiber hydraulic concrete (RFHC) using an orthogonal testing method. The optimal mix proportion for RFHC is determined through orthogonal range and variance analysis results. The influence of polypropylene fiber content, rubber particle content, and rubber particle size on the compressive strength, flexural strength, split tensile strength, brittleness, and crack resistance of rubber fiber concrete is thoroughly examined. Durability tests are conducted based on the optimal mix ratio, and a comparative analysis of the durability between RFHC and conventional concrete is carried out. The findings indicate that the mechanical properties of the concrete exhibit a significant decline with increasing rubber content and decreasing rubber particle size. The variation in rubber content notably affects the mechanical properties of hydraulic concrete. The frost resistance and impermeability of RFHC are considerably higher than those of conventional concrete, while the erosion resistance of RFHC surpasses that of the conventional benchmark concrete. This research offers valuable benchmarks for the theoretical design and practical engineering application of RFHC, contributing to the advancement of sustainable construction materials.

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Finite element simulation of prevention thermal cracking in mass concrete

Cited by 13 publications

References 0 publications

Refinement of a Deflection Basin Area Index Method for Rigid Pavement

Refinement of a Deflection Basin Area Index Method for Rigid Pavement

Thermal control system based on ant colony algorithm

The mechanics and durability of rubber fiber hydraulic concrete on laboratory

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