Composite element algorithm for the thermal analysis of mass concrete: Simulation of lift joint

Chen, S. H.; Su, Peifang; Shahrour, Isam

doi:10.1016/j.finel.2011.01.002

Cited by 22 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The stress distribution of the cross section where AIJs embedded will be more affected by the plasticity of concrete 4and (6). The initiation cracking strength can be given as…”

Section: Analytical Model Of Cracking Strength For Aijsmentioning

confidence: 99%

“…In the past decades, mass concrete structures such as super long underground sidewall, large basement slab, and roller compacted concrete (RCC) have been widely used in the practical construction like subway station [1], high-rise building [2], and RCC arch dam [3]. The early irregular cracks caused by the thermal stress of mass concrete during construction period are a worldwide problem to the structure [4,5], and how to effectively control the early-age temperature cracks in the mass concrete structure is significantly concerned by researchers [6][7][8]. Up to now, many methods have been introduced and applied to eliminate these early random cracks, such as adopting deformation joints [9], setting postpoured strips [2], and using high performance materials [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Study on Cracking Strength of AIJs to Release the Early-Age Stress of Mass Concrete

Chen

Wang

et al. 2015

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

This paper aims to theoretically and numerically assess the effect of setting artificial-induced joints (AIJs) during construction period of a mass concrete structure to release the early-stage thermal stress. With respect to the coupling influences of various factors such as size and boundary of AIJs, an analytical model for its cracking strength on the setting section of mass concrete is proposed based on double-parameter fracture theory. A kind of hyper-finite element analysis (FEA) for many array AIJs in simplified plane pate is also presented by using bilinear cohesive force distribution. The results from the present model and numerical simulation were compared to those of experimental data to prove the efficiency and accuracy of the analytical model and FEA. The model presented in this study for the cracking strength of AIJs provides a simple useful tool to accurately evaluate how many early stress AIJs reduced. The theoretical solution and FEA results could also be significantly contributed to find the “just” and “perfect” release of the temperature stress and to improve the design level of AIJs in mass concrete structure.

show abstract

“…The stress distribution of the cross section where AIJs embedded will be more affected by the plasticity of concrete 4and (6). The initiation cracking strength can be given as…”

Section: Analytical Model Of Cracking Strength For Aijsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Study on Cracking Strength of AIJs to Release the Early-Age Stress of Mass Concrete

Chen

Wang

et al. 2015

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…Kim [3] proposed a line element model of a cooling pipe system based on an internal flow theory for the purpose of calculating the temperature changes and comparing the results with other experimental findings. Ding [4] combined a composite element method (CEM) with a genetic algorithm (GA) in order to conduct simulation and feedback analyses of the temperature fields of mass concrete. The results showed that the method was both efficient and feasible.…”

Section: Introductionmentioning

confidence: 99%

Pipe Cooling Optimization of the Mass Marine Concrete Temperature Fields for the Main Tower Cap of the Zhoudai Sea-crossing Cable-stayed Bridge

Chen,

He,

Jin

et al. 2023

View full text Add to dashboard Cite

This study considered the complex offshore construction environment of the mass marine concrete pouring processes for the main tower cap of the sea-crossing cable-stayed bridge in the DSSJ03 bid section of the Ningbo Zhoushan Port. A MIDAS/Civil finite element software method was used to analyze the temperature field of the mass marine concrete of the No. ZT4 main tower cap, for the purpose of simulating and optimizing the flow velocity and inlet water temperatures of the cooling water pipes, as well as to optimize the original pipe cooling scheme. It was found that when compared with the actual monitoring temperature data of the hydration heat during the construction process, the cooling rate of the optimized pipe cooling scheme had been controlled within 2℃/d, with a high stress safety factor. This had effectively reduced the impacts of temperature stress of the marine concrete of the main tower cap. In addition, the generation of cracks in the mass marine concrete sections located in the harsh offshore environment was decreased, and the construction quality of the marine concrete poured into the complex offshore environment had been improved.

show abstract

“…Jaafar et al [7] studied the impact of concrete placement schedules on the thermal response of RCC dams with a finite element based computer code. Chen et al [8] developed a thermal algorithm based on the composite element method (CEM) for massive concrete structures containing lift joints. Teixeira et al [9] conducted computational studies using a hybrid finite element formulation for cement hydration in concrete structures.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Temperature Control Scheme for Roller Compacted Concrete Dams Based on Finite Element and Sensitivity Analysis Methods

Zhou¹,

Zhou²,

Zhao³

et al. 2016

CEJ

View full text Add to dashboard Cite

Achieving an effective combination of various temperature control measures is critical for temperature control and crack prevention of concrete dams. This paper presents a procedure for optimizing the temperature control scheme of roller compacted concrete (RCC) dams that couples the finite element method (FEM) with a sensitivity analysis method. In this study, seven temperature control schemes are defined according to variations in three temperature control measures: concrete placement temperature, water-pipe cooling time, and thermal insulation layer thickness. FEM is employed to simulate the equivalent temperature field and temperature stress field obtained under each of the seven designed temperature control schemes for a typical overflow dam monolith based on the actual characteristics of a RCC dam located in southwestern China. A sensitivity analysis is subsequently conducted to investigate the degree of influence each of the three temperature control measures has on the temperature field and temperature tensile stress field of the dam. Results show that the placement temperature has a substantial influence on the maximum temperature and tensile stress of the dam, and that the placement temperature cannot exceed 15 °C. The water-pipe cooling time and thermal insulation layer thickness have little influence on the maximum temperature, but both demonstrate a substantial influence on the maximum tensile stress of the dam. The thermal insulation thickness is significant for reducing the probability of cracking as a result of high thermal stress, and the maximum tensile stress can be controlled under the specification limit with a thermal insulation layer thickness of 10 cm. Finally, an optimized temperature control scheme for crack prevention is obtained based on the analysis results.

show abstract

Composite element algorithm for the thermal analysis of mass concrete: Simulation of lift joint

Cited by 22 publications

References 3 publications

The Study on Cracking Strength of AIJs to Release the Early-Age Stress of Mass Concrete

The Study on Cracking Strength of AIJs to Release the Early-Age Stress of Mass Concrete

Pipe Cooling Optimization of the Mass Marine Concrete Temperature Fields for the Main Tower Cap of the Zhoudai Sea-crossing Cable-stayed Bridge

Optimization of the Temperature Control Scheme for Roller Compacted Concrete Dams Based on Finite Element and Sensitivity Analysis Methods

Contact Info

Product

Resources

About