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- Title
Finite Element Method-based Temperature Field Analysis of Early Age Frozen Shaft Lining with Temperature-Dependent Characteristics.
- Authors
Yu Gao; Jie Han; Peng Ma; Hongguang Ji; Chunhui Zhao
- Abstract
Accurately simulating the temperature field of frozen shaft lining in its early age (28 days) is difficult due to the influence of low temperature freezing and the heat of hydration in concrete. The temperature-dependent variation of the thermal properties of concrete and surrounding rock makes the simulation even more challenging. This study proposed a simulation method by considering the concrete maturity to characterize the spatiotemporal variation of temperature field in early age. In accordance with Arrhenius and heat conduction theories, a 3D temperature field control equation containing a model of hydration exothermic with equivalent age was established. The thermal parameters of rock and concrete at different temperatures were obtained through laboratory tests, and the temperature field of the lining was analyzed numerically by using ANSYS Parametric Design Language. The reliability of this method was verified by comparing with the measured data. Comparison results show that the proposed model successfully reflects the facts that the maximum temperature rise at different locations of the lining and the time taken to reach the maximum temperature rise are different. The temperature field in the early age shows five stages: induction period, linear growth period, nonlinear growth period, cooling period, and stabilization period. In the first 3 days, the temperature gradient between the inside and outside of the lining is large, which is prone to early temperature damage. This study provides a significant reference for early temperature damage and lining structure design optimization.
- Subjects
TEMPERATURE control; HEAT of hydration; HEAT conduction; THERMAL properties; TEMPERATURE
- Publication
Journal of Engineering Science & Technology Review, 2022, Vol 15, Issue 6, p89
- ISSN
1791-2377
- Publication type
Article
- DOI
10.25103/jestr.156.11