Crack mechanism and prevention measures of concrete in the initial pouring based on field temperature gradient experiment

2018 2nd International Workshop on Renewable Energy and Development

能源学;经济学

Tan, Yaosheng^1 ; Liu, Youzhi^2 ; Zhou, Mengxia^2 ; Wang, Zhenhong^2 ; Ping, Yang^2

China Three Gorges Corporation, Beijing

100038, China^1

China Institute of Water Resources and Hydropower Research, Beijing

100038, China^2

关键词: Concrete cracking;    Concrete temperatures;    Effective measures;    Feedback analysis;    Finite element simulations;    In-situ experiments;    Prevention measures;    Surface temperature gradient;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/153/5/052021/pdf
DOI  :  10.1088/1755-1315/153/5/052021

来源: IOP

【 摘 要 】

To study concrete cracking, a feedback analysis on variations of surface temperature gradient has been conducted for concrete at the intermission stage of layer pouring with a precise model and finite element simulation method combined with in-situ experiments of a dry hot valley dam. This paper presents the results of concrete stresses and their development under real concrete temperature gradient and explores the internal crack mechanism and possible hidden cracks of the concrete. A discussion on effective measures for prevention of such cracking risk, particularly for construction of valley dams in a dry hot season is also given. This work is of practical reference value for construction of concrete structure in dry hot valley.