scholarly journals Retraction Notice: Experimental Research on the Hydration Heat Temperature Field of Hollow Concrete Piers

2016 ◽  
Vol 10 (1) ◽  
pp. 604-604
Author(s):  
Jun Peng ◽  
Chunping Tang ◽  
Liangliang Zhang ◽  
Ayad Thabit Saeed
Keyword(s):  
Temperature Field ◽  
Experimental Research ◽  
Hydration Heat ◽  
Heat Temperature ◽  
Retraction Notice

scholarly journals Experimental Research on the Hydration Heat Temperature Field of Hollow Concrete Piers

2014 ◽  
Vol 8 (1) ◽  
pp. 482-487 ◽  
Author(s):  
Jun Peng ◽  
Chunping Tang ◽  
Liangliang Zhang ◽  
Ayad Thabit Saeed
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Hydration Heat ◽  
Maximum Temperature ◽  
Concrete Bridge ◽  
Central Temperature ◽  
Heat Temperature ◽  
Surface Cracking ◽  
Removal Time ◽  
Short Period

Measuring points were observed continuously to reveal the hydration heat temperature distribution of hollow concrete bridge pier. The results showed that as the thickness of the pier increased, the central temperature of the pier increased significantly due to hydration and the heat was difficult to be dissipated. The hydration temperature accounted for up to 70% of the maximum temperature rise during 20 h and reached the maximum temperature at 24 h after pouring the concrete. There was a jump value between the central temperature and surface temperature in a short period after removing the framework. The jumping was the most dangerous moment for the cracking of pier surfaces. Therefore, the formwork removal time has to be determined prudently and corresponding measures have to be conducted to reduce the possibility of pier surface cracking.

Experimental Research on the Temperature Field of High and Hollow-Thin Pier

2012 ◽  
Vol 256-259 ◽  
pp. 714-718
Author(s):  
Jian Cheng Sun ◽  
Zhong Le Zhang ◽  
Qing Yi Xiao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Temperature Field ◽  
Tensile Stress ◽  
Experimental Research ◽  
Temperature Difference ◽  
Hydration Heat ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
And Control

To study the temperature field changing regulation of hydration heat and control concrete cracks caused by great temperature difference in the construction of hollow-thin pier, testing the temperature field of the high and hollow-thin pier of Cha Jiugou Bridge and it got changing regulation of the temperature. The finite element analysis on the pier was also carried out and the temperature stress contours and curves of the hydration heat of the concrete are obtained. It can be seen that the outer surface and the center of the pier are compressive within 10 hours in the pouring early. With the temperature difference, the center generates the compressive stress, the surface generates tensile stress.

A Study Regarding the Unsteady Heat Transfer and Phase Change

2014 ◽  
Vol 659 ◽  
pp. 353-358
Author(s):  
Gelu Coman ◽  
Cristian Iosifescu ◽  
Valeriu Damian
Keyword(s):  
Heat Transfer ◽  
Numerical Modeling ◽  
Temperature Field ◽  
Temperature Distribution ◽  
Finite Elements ◽  
Experimental Research ◽  
Theoretical Study ◽  
Ice Formation ◽  
Unsteady Heat Transfer ◽  
Cooling Pipes

The paper presents the experimental and theoretical study for temperature distribution around the cooling pipes of an ice rink pad. The heat transfer in the skating rink track is nonstationary and phase changing. In case of skating rinks equipped with pipe registers, the temperature field during the ice formation process can’t be modeled by analytical methods. The experimental research was targeted on finding the temperatures in several points of the pad and also details on ice shape and quality around the pipes. The temperatures measured on the skating ring surface using thermocouples is impossible due to the larger diameter of the thermocouple bulb compared with the air-water surfaces thickness. For this reason we used to measure the temperature by thermography method, thus reducing the errors The experimental results were compared against the numerical modeling using finite elements.

Simulation and experimental research on tool temperature field for low-temperature cutting of Ti-5553

2020 ◽  
Vol 563 (1) ◽  
pp. 139-147
Author(s):  
Erliang Liu ◽  
Shuang Deng ◽  
Chao Zhang ◽  
Huiping Zhang ◽  
Xudong Wei
Keyword(s):  
Temperature Field ◽  
Low Temperature ◽  
Experimental Research ◽  
Tool Temperature

A MIDAS Simulation Analysis of a Pile Cap’s Pipe Cooling Technology

2014 ◽  
Vol 614 ◽  
pp. 124-127
Author(s):  
Meng Kai Lin ◽  
Hai Lian Li
Keyword(s):  
Field Theory ◽  
Finite Element ◽  
Temperature Field ◽  
Temperature Difference ◽  
Simulation Analysis ◽  
Hydration Heat ◽  
Finite Element Software ◽  
Cooling Method ◽  
Pile Cap ◽  
Cooling Technology

Taking the concrete pouring for a passenger station’s pile cap as the research background, the paper establishes a model of pile cap’s hydration heat, by using the finite element software MIDAS. The paper also studies the main parameters and the temperature field theory which affect the hydration heat. It indicates that the pipe cooling method can significantly reduce the temperature difference between the inside and the outside when pouring massive concretes, and it is an effective way to prevent the generation of cracks.

Analysis of Model Test Data for CFG Group Piles in Permafrost Areas

2014 ◽  
Vol 501-504 ◽  
pp. 16-19
Author(s):  
Zhao Jian Luan ◽  
Qiang Xin ◽  
Yan Min Jia
Keyword(s):  
Temperature Field ◽  
Heat Effect ◽  
Frozen Soil ◽  
Hydration Heat ◽  
Measured Temperature ◽  
Geological Conditions ◽  
Soil Temperatures ◽  
Concrete Hydration ◽  
Group Piles ◽  
Model Temperature

In this paper, the author simulates geological conditions of permafrost areas, establi-shes CFG group piles indoor model, observes the pile and frozen soil temperature field, then compares the calculated results of the group piles and frozen soil temperatures under concrete hydration heat effect by using ABAQUS with the measured temperature data, thus determines the applicability of ABAQUS for analysis of CFG group piles temperature in permafrost areas, in order to analyze temperature distribution regularities of group piles and frozen soil under concrete hydration heat effect, thermal perturbation range of CFG group piles in permafrost areas, and effects of different concrete molding temperature on model temperature field.

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