Simulation of thermal stress and control measures for rock-filled concrete dam in high-altitude and cold regions

Zhang, Yuxiang; Pan, Jianwen; Sun, Xinjian; Feng, Jijun; Sheng, Dengqiang; Wang, Haiyun; Zhou, Xinjie; He, Yinpeng; Diao, Mushuang; Zhan, Qibing

doi:10.1016/j.engstruct.2020.111721

Cited by 30 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thermal parameters of RFC were examined in [25] encompassing the determination of constant heat gain, the coefficient of linear expansion, density, and permeability. It is crucial to clearly define the building specifications to effectively utilize the benefits offered by applications other than RFC hydraulic structures [26].…”

Section: Rock-filled Concrete Constructionmentioning

confidence: 99%

A Comprehensive Literature Review on the Elastic Modulus of Rock-filled Concrete

Ihteshaam,

Jin

2024

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

Rock-Filled Concrete (RFC) is formed by pouring High-performance Self-Compacting Concrete (HSCC) into gaps between pre-placed rocks (that form a strong rock skeleton) in the formwork. An in-depth analysis of RFC's elastic modulus must focus on its static and elastic modulus behavior, strength characteristics, and sustainability aspects. Mesoscopic finite element modeling effectively incorporates pre-positioned rocks, Self-Compacting Concrete (SCC), and the Interfacial Transition Zone (ITZ) to correctly predict performance. RFC is a promising alternative to traditional construction methods, offering combined advantages for masonry and concrete techniques while reducing cement usage. Studies continue to examine the creep properties of reinforced fiber composites, with promising signs of their effectiveness in reducing hydration heat and concrete shrinkage. Subaquatic conservation agents enhance environmental stewardship in wet situations. The elastic modulus of rock-filled concrete increases logarithmically, mostly influenced by the rock-fill composition. It is crucial to study the shape, size, and rock-fill ratio of rocks in RFC that impact its stability, strength, and resistance to static and dynamic loads. Irregularly shaped rocks can enhance interlocking and mechanical properties, while a well-graded mix of sizes improves compaction and uniformity. Studying these properties enables engineers to optimize design and construction for durability and performance.

show abstract

Section: Rock-filled Concrete Constructionmentioning

confidence: 99%

A Comprehensive Literature Review on the Elastic Modulus of Rock-filled Concrete

Ihteshaam,

Jin

2024

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

show abstract

“…Zhang et al [21] conducted an analysis of the influence of extremely low temperatures on the behavior of rock-filled concrete (RFC) dams located in cold regions. The TF was calculated during the construction and exploitation process.…”

Section: Introductionmentioning

confidence: 99%

Influence of Monolith Length on Temperature Field of Concrete Gravity Dams

Mirković,

Kuzmanović,

Todorović

2024

Applied Sciences

View full text Add to dashboard Cite

This paper examines the influence of monolith length on the temperature field of concrete gravity dams built using the block method. The developed 3D model is capable of conducting a thermal analysis of a 95.0 m high concrete gravity dam built using the block method, where each newly cast block represents a new analysis phase. The calculation accounts for the period of construction, the filling of the reservoir, and the service for a total duration of about 5 years. The thermal properties of the material, the influence of cement hydration heat, the temperature of the surrounding rock mass, the temperature of the fresh concrete mixture, and the corresponding boundary conditions defining a heat transfer were taken into account. The height and width of the blocks, as well as the sequence of concreting, were considered invariable, while the length of the blocks (dimension in the direction of the dam’s axis equal to the monolith length) varied, with values of 10.0, 12.5, 15.0, and 20.0 m. The obtained calculation results for the control nodes showed that the maximum reduction in the monolith length (from 20.0 m to 10.0 m) caused a decrease in the maximum temperature values of the concrete (from 1.6 to 3.4 °C, depending on the control node). Also, the results showed that, by reducing the length of the monolith, there was a delay in the moment at which the maximum temperature values of the concrete appeared in the selected control node. The delay in reaching the maximum, in relation to the 10.0 m long monolith, was from 7 days (for points on the crest dam) to 49 days (for points in the central zone of the monolith) for the other considered monolith lengths. The above indicates the importance of concrete temperature control for longer monoliths, especially during construction in extreme air temperatures. The main contribution of the conducted analysis is the development of insight into temperature field changes depending on monolith length, which can help engineers during the design and construction of new, as well as the maintenance of existing, dams.

show abstract

Observation via Particle Image Velocity (PIV) Technology of Seepage Features in Replicas of Rock Fractures

Xu,

Lei,

Huaiguang

et al. 2024

Rock Mech Rock Eng

View full text Add to dashboard Cite

Simulation of thermal stress and control measures for rock-filled concrete dam in high-altitude and cold regions

Cited by 30 publications

References 32 publications

A Comprehensive Literature Review on the Elastic Modulus of Rock-filled Concrete

A Comprehensive Literature Review on the Elastic Modulus of Rock-filled Concrete

Influence of Monolith Length on Temperature Field of Concrete Gravity Dams

Observation via Particle Image Velocity (PIV) Technology of Seepage Features in Replicas of Rock Fractures

Contact Info

Product

Resources

About