A combined finite difference and finite element model for temperature and stress predictions of cast-in-place cap beam on precast columns

Do, Tu Anh; Chen, Hung-Liang; Leon, Guadalupe; Nguyen, Thuan Huu

doi:10.1016/j.conbuildmat.2019.05.019

Cited by 25 publications

(13 citation statements)

References 15 publications

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“…The boundary conditions consist of the initial temperature and the external ambient temperature over time. The air convection coefficient at the insulation surfaces was assumed to be 13.9 W/m 2 -K [5,23]. Two temperature sensors were installed at the center and at the center top surface of the footing to record temperatures within 7 days after placement.…”

Section: Temperature Analysis Of Bridge Pier Footingmentioning

confidence: 99%

“…Among them, the Schmidt's method is a simple approach but has been widely used for computing the temperatures for single nodes in the concrete [1]. The finite difference (FD) method was also employed in spreadsheet programs [2,3] or in computer programs [4,5] for calculating temperature-time histories in concrete elements. A twodimensional model for thermal analysis based on the finite volume method (FVM) was introduced by Yikici and Chen [6].…”

Section: Introductionmentioning

confidence: 99%

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A Combination of Finite Difference and Finite Element Methods for Temperature and Stress Predictions of Early-Age Concrete Members

Do¹

2021

Finite Element Methods and Their Applications

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A combination of finite difference and finite element methods was employed to develop a model for predicting the temperature development and thermally induced stresses in early-age concrete members (such as bridge footings, piers, columns, girders, and slabs). A two-dimensional finite difference (FD) scheme was utilized for heat generation and transfer within a hydrating concrete member. A finite element (FE) plane strain model was then established to compute the thermal stresses in the concrete subjected to the temperature changes. The FD-FE model can be easily created using any programing language, and the methodology can be used to predict the temperatures and stresses as well as assess the possibility of early-age cracking in concrete members.

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Section: Temperature Analysis Of Bridge Pier Footingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Combination of Finite Difference and Finite Element Methods for Temperature and Stress Predictions of Early-Age Concrete Members

Do¹

2021

Finite Element Methods and Their Applications

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“…Hiện nay, trong lĩnh vực xây dựng cầu, bê tông cường độ cao (BTCĐC) được sử dụng rất phổ biến cho các công trình đòi hỏi khẩu độ nhịp lớn và thời gian thi công nhanh. BTCĐC thường sử dụng hàm lượng xi măng cao trong thành phần cấp phối vì vậy nhiệt tỏa ra trong quá trình thủy hóa xi măng lớn hơn so với hỗn hợp bê tông thường [1,2]. Đối với các công trình cầu sử dụng BTCĐC, việc kiểm soát nhiệt độ của bê tông trong giai đoạn thi công là rất quan trọng nhằm đảm bảo kết cấu không xuất hiện vết nứt nhiệt làm ảnh hưởng đến khả năng khai thác và độ bền sau này.…”

Section: đặT Vấn đềunclassified

Mức độ thủy hóa và sự phát triển cường độ trong bê tông cường độ cao

Anh¹,

Xuân²,

Việt³

et al. 2019

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This paper presents a relationship between the strength development in a highstrength concrete (HSC) mix and the degree of cement hydration. Compressive strength and splitting tensile strength development was experimentally obtained for the HSC mix, while the adiabatic temperature rise was measured from an adiabatic calorimeter. The hydration parameters consisting of time and shape parameters were determined using the curve fitting method. The concrete compressive strength and degree of hydration had a linear relationship, similar to normal concrete. However, the HSC mix had a greater splitting tensile strength development rate compared with that of normal ones.

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“…They found that the PCA and ACI 207.R methods provided poor predictions. More recently, finite-element and finite-difference have been used to predict the temperature development of mass concrete structures by modeling the heat generation measured in adiabatic or isothermal conditions [2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Mass Concrete Containing Ground Granulated Blast Furnace Slag

Leon

Chen

2021

CivilEng

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In this study, the early age thermal properties of a concrete mix containing ground granulated blast furnace slag (GGBFS) were investigated and incorporated in a finite-element model. A two-term exponential degree of hydration function was proposed to better capture the early age behavior. An FEM program (ABAQUS) was used to predict the temperature time-history of three 1.2-m (4-ft) cubes cast with a mix design containing 50% replacement of the cement by weight with GGBFS. The FEM predictions match well with the experimental temperature measurements. Results show that using the measurements of the thermal properties, an accurate estimation of the temperature difference can be obtained for a concrete mix containing GGBFS, and engineers can use the estimated temperature difference to take preventative measures to minimize the risk of thermal cracking.

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A combined finite difference and finite element model for temperature and stress predictions of cast-in-place cap beam on precast columns

Cited by 25 publications

References 15 publications

A Combination of Finite Difference and Finite Element Methods for Temperature and Stress Predictions of Early-Age Concrete Members

A Combination of Finite Difference and Finite Element Methods for Temperature and Stress Predictions of Early-Age Concrete Members

Mức độ thủy hóa và sự phát triển cường độ trong bê tông cường độ cao

Thermal Analysis of Mass Concrete Containing Ground Granulated Blast Furnace Slag

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