Article
Engineering, Civil
Baolin Sun, Yongqing Yang, Xiaobin Li, Meng Yan, Mingzhi Xie, Yi Bao
Summary: This study investigates the effects and mechanisms of frost heaving damages on the mechanical behaviors of post-tensioned prestressed concrete girders of a highway bridge. The results show that frost heaving reduces the effective prestress, mechanical properties of concrete, and bond between concrete and tendon, thus affecting the crack resistance and durability of the girders.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Yongcheng Ji, Dayang Wang
Summary: This study investigates the durability of waste brick concrete (WBC) using a combination of experimental programs and finite element numerical methods. The freeze-thaw and flexural tests, with the content of waste brick coarse aggregate (WBCA) and the number of freeze-thaw cycles as variables, reveal the freeze-thaw damage mechanisms at the microscopic interfaces of recycled concrete through scanning electron microscopy. The evolution laws of various mechanical properties of WBC are analyzed, and the temperature stress distribution and bending damage law at different freeze-thaw times are shown using numerical simulations.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Chenxuan Lu, Yongcheng Ji, Yunfei Zou, Jieying Zhou, Yuqian Tian, Zhiqiang Xing
Summary: The evaluation of frost resistance for concrete reinforced with FRP varies depending on the reinforcement methods used. In this study, freezing and thawing tests were conducted on FRP-reinforced concrete prisms and cylinders to simulate various structures in cold climates. The specimens' frost resistance was evaluated through reinforcement techniques, morphological analysis, weight tests, and relative dynamic modulus of elasticity tests. The findings showed significant differences in weight and strength changes after freeze-thaw cycles, with CFRP and GFRP-reinforced concrete exhibiting better resistance compared to unreinforced concrete. Finite element software ABAQUS was also used to simulate the freeze-thaw cycle test and verify the validity of the FRP-reinforced concrete model.
Article
Engineering, Environmental
Shanpeng Cao, Caichu Xia, Shuwei Zhou, Yao Zhang
Summary: Precise evaluation of frost heaving force and surrounding rock plastic zone is crucial for preventing freezing damage in cold-region tunnels. This paper presents a new elastoplastic solution for tunnel frost heaving force considering double non-uniform frost heave and intermediate principal stress, which can better guide the frost resistance design of tunnels in cold regions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Civil
Yaoying Huang, Zhiyong Wan
Summary: This study investigates the use of a modified statistical model to quantitatively analyze and assess the current operation status of an RCC gravity dam in an alpine region. The analysis shows the importance of frost heaving data in monitoring dam crest deformation and suggests considering the displacement caused by frost heaving in safety assessments.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Engineering, Civil
Baolin Sun, Yongqing Yang, Xiaobin Li, Meng Yan, Jianmin Xia, Yi Bao
Summary: This case study proposes and evaluates an approach to repair post-tensioned prestressed concrete bridge girders in cold regions. The girders were repaired with polymeric adhesives, which significantly enhanced their load capacity, ductility, and crack resistance. The study provides practical solutions and insights into the mechanisms for repairing frost-heaving damage in prestressed concrete girders.
JOURNAL OF BRIDGE ENGINEERING
(2022)
Article
Construction & Building Technology
Haibo Jiang, Dongsen Zhai, Pengfei Xiang, Gang Wei
Summary: In this study, a three-field coupling governing equation considering temperature, seepage and stress was deduced to investigate the problem of frost damage to wall rock caused by the phase transition between water and ice in hydraulic tunnels in cold regions. A three-dimensional frost heaving finite element model was established based on the deduced coupling equations using finite element software. By numerically simulating the process of frost heaving, the spatial distribution and variation law of the frozen area and frost heaving force were obtained. The results showed that the frozen area of wall rock at the tunnel entrance has a funnel shape and the frost depth gradually decreases along the depth of the tunnel. The frost heaving force has a consistent circumferential distribution law with depth, with the maximum frost heaving tension occurring at the arch top and arch bottom and turning into frost heaving pressure at the arch waist. The frost heaving force has a greater influence on the arch top and arch bottom than on the arch waist.
Article
Multidisciplinary Sciences
Liping Wang, Zhuxu Dong, Ning Li, Wenli Wang, Yanzhe Tian, Shuanhai Xu
Summary: The formation and growth of ice layers in fractured rock masses is a major cause of frost weathering in bedrock in cold regions. This study conducted frost weathering tests on a simulated rock mass with a vertical through fracture to simulate the mechanism of ice layer formation. The results revealed a novel mechanism for ice layer formation and explored the effects of relative humidity and temperature gradients on water vapor migration.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Environmental
Jun Chen, Cheng Zhao, Quan Liu, Xijun Shi, Zhenhao Sun
Summary: Frost Heaving Stress (FHS) is a main cause of freeze-thaw (FT) damage in porous cement concrete. A customized measurement device was used to study the influence of curing time, air void, saturation degree, and freeze-thaw cycles on FHS evolution. The results showed that FHS evolution can be divided into three stages, and the increase of saturation degree leads to the growth of FHS. FHS does not completely dissipate in the thawing process.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Construction & Building Technology
Bin Zheng, Tongchun Li, Huijun Qi, Lingang Gao, Xiaoqing Liu, Li Yuan
Summary: In this paper, the mesoscopic behavior of concrete under frost action is investigated by considering the effect of pore water phase change using the Material Point Method (MPM). A new method, ITZ-embedded method, is proposed to simulate the heat exchange discontinuity role of interfacial transition zones (ITZ) in real concrete. The study demonstrates the feasibility of the multi-field coupling MPM method in researching the initiation and propagation of frost cracking in concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Yuxiang Zhang, Jianwen Pan, Xinjian Sun, Jijun Feng, Dengqiang Sheng, Haiyun Wang, Xinjie Zhou, Yinpeng He, Mushuang Diao, Qibing Zhan
Summary: By establishing a temperature field calculation program and using the Jinqiao RFC Gravity Dam as an example, it was found that the hydration temperature rise of RFC is lower than that of normal concrete, reducing the temperature and thermal stress of the concrete dam. Installing an insulation layer on the surface of the dam body in HACR can significantly increase the surface temperature and reduce temperature difference and tensile stress, meeting the requirements of temperature control and crack prevention.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Donghai Liu, Youle Wang, Jianyu Liang
Summary: This research developed PCM-clay to improve construction efficiency in cold regions, and verified its feasibility and protection effectiveness in a simulated environment, demonstrating its potential as a temperature control solution.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Xiaobin Dong, Han Wang, Yanchun Miao, Yuchao Gao, Yali Li, Junlin Lin, Jinyang Jiang, Zeyu Lu
Summary: This paper addresses the challenges of sustainable development of concrete infrastructures in plateau regions. It provides a brief description of the problems encountered in harsh plateau environments and reviews the current research on using superabsorbent polymers (SAP) to reinforce concrete. The paper discusses the limitations, improvement strategies, and future perspectives of SAP in achieving shrinkage inhibition, mechanical enhancement, and air-entrainment improvement in concrete in plateau regions from a sustainable standpoint.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Chuan Li, Lubing Yang, Chuan Luo, Hao Liu, Xiaorong Wan
Summary: This study proposes a method for monitoring and measuring the frost heaving strain, thermal strain, and applied stress strain in extreme cold and high-altitude tunnel structures. The results show that thermal strain is the main cause of frost damage to the lining structure.
Article
Engineering, Environmental
Wenshao Xin, Jiankun Liu, Xu Li, Tianfei Hu, A. F. Kolos
Summary: Based on research on the prefabricated cone cylindrical (PCC) tower foundation model, indoor model tests were conducted to study the frost jacking characteristics of the tower foundation under different temperatures. The research indicates that the PCC tower foundation combines the structural characteristics of a tapered column foundation and prefabricated foundation, and has good frost resistance and easy construction. A foundation engineering design criterion has been proposed for burying the upper surface of the foundation below the freezing depth line to prevent engineering accidents.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mikael Schlumpf, Jordy Hendrikx, John Stormont, Ryan Webb
Summary: The formation of wet-snow slab avalanches is related to the liquid water content and strength of the snow layers. However, current studies disagree on this relationship and there is limited understanding of snow layers with a saturation level of θ=7% and above.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
William R. Jacobson
Summary: This study investigates the kinematics of deformation in debris bands associated with an overdeepened basin in Iceland. The research reveals the presence of multiple fabric types, suggesting a complex deformation history. Furthermore, pure shear-dominated strain was observed in an ice-free sediment ridge on the glacier surface.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Shanpeng Cao, Caichu Xia, Shuwei Zhou, Yao Zhang
Summary: Precise evaluation of frost heaving force and surrounding rock plastic zone is crucial for preventing freezing damage in cold-region tunnels. This paper presents a new elastoplastic solution for tunnel frost heaving force considering double non-uniform frost heave and intermediate principal stress, which can better guide the frost resistance design of tunnels in cold regions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Sina Niazi, Aimane Najmeddine, Maryam Shakiba
Summary: This study investigates the mechanical response and damage of asphalt concrete under freezing temperatures. A coupled thermo-hydro-mechanical constitutive framework is proposed and validated through simulations and experiments. The effects of microstructural constituents on the mechanical response are also studied through parametric analysis.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Shi-chun Cai, Xiao-hua Yang, Fei Ye
Summary: A calculation method based on the Winkler foundation model is proposed for analyzing the stress and deformation in excavation support structures in seasonally frozen soil regions. The method considers various factors and has been validated to exhibit good applicability.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Guanjun Wei, Chuanjin Lei, Maoning Gao, Hongyu Zhou, Xin Li, Chaoyue Zhang
Summary: This study introduces a novel approach to improve the accuracy of deformation prediction in frozen soil areas by integrating post-processing deformation from InSAR with a frost heave model using the EnKF assimilation algorithm. Experimental results show that this approach reduces the RMSE to 0.247 mm, indicating its high feasibility and practicality.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Cheng Xu, Yugui Yang, Shanshan Hou, Hui Zhang, Chenxiang Li
Summary: This study investigates the properties and characteristics of frozen loess through nuclear magnetic resonance (NMR) tests and flexural tests. The results show that as the temperature decreases, the pore ice content in frozen loess rapidly increases, making the phase transition of residual unfrozen water difficult. The flexural strength, toughness, and roughness of the fracture surface of frozen loess vary under different freezing temperatures and water content conditions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Jianguo Lu, Wansheng Pei, Mingyi Zhang, Xusheng Wan, Jiacheng Zhang, Yindong Wang
Summary: This paper investigates the effects of freeze-thaw cycles and salt erosion on the mechanical and microstructural properties of concrete modified with nano-TiO2 and nano-SiO2. The results show that the added nanoparticles and environment media significantly influence the overall performance of concrete samples. The SCF has the greatest influence on degradation, and the compressive strength of NS-modified concrete is lower than that of NT-modified concrete. The optimal nanoparticles ratios for NS and NT modified concretes are 1% and 2%, respectively. Furthermore, NS modification leads to better filling effect on pore structure and larger crystals on the concrete surface compared to NT modification. In the first 90 freeze-thaw cycles, the gel micro-pores increase while the macro-pores decrease, but this trend reverses within the 90-150 cycles. This research provides important insights into the erosion and frost resistance of nano-concretes in marine and cold region engineering.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Florian McLelland, Floris van Breugel
Summary: In this study, a proof-of-concept approach for automatically assessing qualitative aspects of snow type while skiing using strain sensors is explored. The algorithm developed achieves a 97% accuracy in correctly assigning qualitative labels to different segments of a skiing trajectory. This method has the potential for improving quantitative characterization of ski performance, providing snow-specific recommendations, and developing skis with automated stiffness tuning based on snow type.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Purushottam Kumar Garg, Aparna Shukla, Mohd. Farooq Azam
Summary: This study remotely investigates 25 well-distributed glaciers in the western Himalaya and finds that these glaciers were in an overall retreating phase from 1990 to 2015. The study also reveals changes in glacier dynamics before and after 2000, including reduced terminus retreat and deglaciation rates, increased surface velocity, and the presence of more glacial lakes and supraglacial debris. The study highlights the importance of topography and local surface conditions in the heterogeneity of glacier response to climate.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Junru Chen, Shuna Feng, Lang Jia, Jiagui Hou, Miles Dyck, Xiaobin Li, Qingbai Wu, Hailong He
Summary: The heat pulse method is commonly used to measure thermal properties of frozen soil, snow, or glaciers, but the phase change caused by ice melting affects the measurement accuracy. This study observed the thermal response of ice under different heating strategies and compared numerical simulations and analytical solutions. The results showed that optimizing phase change parameters improved accuracy and the numerical method effectively improved the calculation accuracy of ice thermal conductivity.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Kazuma Fukui, Chiemi Iba
Summary: By studying the evolution of pore water pressure in brick walls during cyclic freezing and thawing, we found that the water pressure in a south facing wall increases significantly during the night in cold regions. Incomplete freeze-thaw cycles are more damaging to building materials than a monotonous repetition of complete freezing and thawing.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Yasir A. Malik, Norbert Karpen, Elmar Bonaccurso, Ilia Roisman, Jeanette Hussong, Philippe Villedieu
Summary: This study quantitatively analyzes the accretion and shedding phenomena caused by ice crystal icing on heated and non-heated surfaces. Experimental findings show the accretion threshold and shed areas under different parametric conditions. The results not only consolidate previous studies, but also identify new phenomena on unheated surfaces with mixed-phase conditions at negative wet bulb temperatures and positive wet bulb temperatures.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Ezieddin Madi, Kevin Pope, Weimin Huang
Summary: This study experimentally investigates the impact of ice thickness on the energy required for de-icing. It is found that an increase in ice thickness at the heater's edge leads to a significant increase in de-icing duration. The results suggest that employing a correlation between ice thickness at different locations can help reduce the thermal energy needed for ice removal from airfoil or cylindrical surfaces.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
K. Riska, R. Bridges
Summary: Understanding the properties and parameters of ice growth models is crucial for assessing the impact of ice on facilities and ship navigation. This paper investigates the theoretical formulations for ice growth and compares calculated results with measurement data. The study focuses on level sea ice growth models and their application in brash ice consolidation modeling, considering factors such as snow cover, salinity, porosity, and atmospheric boundary including wind effect. The findings contribute to a better understanding of ice growth and consolidation processes, informing modeling techniques for marine design and operations.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)