Back Analysis Scheme for Estimating Thermal Characteristics of Mass Concrete Structures Based on Field Measurement Results.

1993 ◽  
Vol 42 (475) ◽  
pp. 436-441
Author(s):  
Hiroshi CHIKAHISA ◽  
Junichi TSUZAKI ◽  
Hirotaka NAKAHARA ◽  
Shunsuke SAKURAI
Keyword(s):  
Field Measurement ◽  
Concrete Structures ◽  
Back Analysis ◽  
Thermal Characteristics ◽  
Mass Concrete ◽  
Analysis Scheme ◽  
Measurement Results

In Situ Stress Measurement and Inversion in Deep Roadway

2013 ◽  
Vol 734-737 ◽  
pp. 759-763 ◽  
Author(s):  
Yong Li ◽  
Yun Yi Zhang ◽  
Ren Jie Gao ◽  
Shuai Tao Xie
Keyword(s):  
Field Measurement ◽  
Stress Measurement ◽  
Measurement Data ◽  
Back Analysis ◽  
In Situ Stress ◽  
Deep Mine ◽  
Accuracy Requirement ◽  
Initial Stress Field ◽  
In Situ Stress Measurement

Jixi mine area is one of the early mined areas in China and it's a typical deep mine. Because of large deformation of underground roadway and dynamic disasters occurred frequently in this mine, five measurement points of in-situ stress in this mine was measured and then analyzed with inversion. Based on these in-situ stress measurement data, numerical model of 3D in-situ stress back analysis was established. According to different stress fields, related analytical samples of neural network were given with FLAC program. Through the determination of hidden layers, hidden nodes and the setting of parameters, the network was optimized and trained. Then according to field measurement of in-situ stress, back analysis of initial stress field was conducted. Compared with field measurement, with accuracy requirement satisfied, it shows that the in-situ stress of rock mass obtained is basically reasonable. Meanwhile, it proves that the measurement of in-situ stress can provide deep mines with effective and rapid means, and also provide reliable data to optimization of deep roadway layout and supporting design.

Temperature Control and Anti-Cracking Measures for a High-Performance Concrete Aqueduct

2013 ◽  
Vol 405-408 ◽  
pp. 2739-2742 ◽  
Author(s):  
Zhen Hong Wang ◽  
Shu Ping Yu ◽  
Yi Liu
Keyword(s):  
Temperature Control ◽  
Temperature Difference ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Structures ◽  
Apparent Temperature ◽  
Mass Concrete ◽  
Water Pipe ◽  
Thin Walled ◽  
Water Pipe Cooling

To solve the problem of cracks developing on thin-walled concrete structures during construction, the authors expound on the causes of cracks and the crack mechanism. The difference between external and internal temperatures, basic temperature difference and constraints are the main reasons of crack development on thin-walled concrete structures. Measures such as optimizing concrete mixing ratio, improving construction technology, and reducing temperature difference can prevent thin-walled concrete structures from cracking. Moreover, water-pipe cooling technology commonly used in mass concrete can be applied to thin-walled concrete structures to reduce temperature difference. This method is undoubtedly a breakthrough in anti-cracking technology for thin-walled concrete structures, particularly for thin-walled high-performance concrete structures. In addition, a three-dimensional finite element method is adopted to simulate the calculation of temperature control and anti-cracking effects f. Results show the apparent temperature controlling effect of water-pipe cooling for thin-walled concrete structures.

scholarly journals Field Measurement Results of the 15 T Nb3Sn Dipole Demonstrator MDPCT1b

2021 ◽  
pp. 1-1
Author(s):  
Joseph Dimarco ◽  
Maria Baldini ◽  
Emanuela Barzi ◽  
Vadim Kashikhin ◽  
Igor Novitski ◽  
...  
Keyword(s):  
Field Measurement ◽  
Measurement Results

Comparison of thermal cracking potential evaluation criteria for mass concrete structures

2021 ◽  
Vol 54 (6) ◽  
Author(s):  
Jianda Xin ◽  
Yi Liu ◽  
Guoxin Zhang ◽  
Zhenhong Wang ◽  
Ning Yang ◽  
...  
Keyword(s):  
Evaluation Criteria ◽  
Concrete Structures ◽  
Thermal Cracking ◽  
Mass Concrete ◽  
Cracking Potential ◽  
Potential Evaluation

Analysis of wind field measurement results of Doppler lidar

2012 ◽  
Vol 24 (9) ◽  
pp. 2037-2042
Author(s):  
唐磊 Tang Lei ◽  
董吉辉 Dong Jihui ◽  
吴海滨 Wu Haibin
Keyword(s):  
Field Measurement ◽  
Wind Field ◽  
Doppler Lidar ◽  
Measurement Results

Influence of steel and polypropylene fibers on cracking due to heat of hydration in mass concrete structures

2018 ◽  
Vol 20 (2) ◽  
pp. 808-822 ◽  
Author(s):  
Muneer K. Saeed ◽  
Muhammad K. Rahman ◽  
Mohammed H. Baluch
Keyword(s):  
Concrete Structures ◽  
Heat Of Hydration ◽  
Polypropylene Fibers ◽  
Mass Concrete

Field measurement on the three-dimensional thermal characteristics of a single air inlet induced draft cooling tower

2020 ◽  
Vol 172 ◽  
pp. 115167
Author(s):  
Xuehong Chen ◽  
Fengzhong Sun ◽  
Xin Li ◽  
Huadong Song ◽  
Peng Zheng ◽  
...  
Keyword(s):  
Field Measurement ◽  
Cooling Tower ◽  
Three Dimensional ◽  
Thermal Characteristics ◽  
Air Inlet
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