Comprehensive evaluation method for structural behavior of concrete dams in cold regions

Xiao, Fu; Zhao, Gang; Wang, Maomei; Wang, Jun; Xu, Yangsheng; Gu, Chongshi

doi:10.1016/j.engstruct.2022.115435

Cited by 10 publications

(5 citation statements)

References 33 publications

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“…Compared with other related studies, this paper focuses on the results-oriented development of the marine economy, using the subjective-objective comprehensive weighting method to measure its index. This method has been proven in previous studies to simultaneously avoid the shortcomings of subjective-objective and objective-objective methods, making it more scientifically reliable in determining index weights [28][29][30]. On this basis, this paper decomposes the comprehensive index of high-quality development of the marine economy and analyzes the changes in the indices of five subsystems.…”

Section: Discussionmentioning

confidence: 99%

Regional Disparities and Dynamic Distribution in the High-Quality Development of the Marine Economy

Zhang,

Wang

2024

Sustainability

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The maritime economy is gradually becoming a new engine for the high-quality development of the economic and social sectors. However, due to factors such as geographical location and natural endowments, there are significant regional disparities, making it challenging for the national maritime economy to achieve balanced development. Therefore, this paper constructs an index evaluation system for the high-quality development of the maritime economy. It calculates the comprehensive index and subsystem indices of the high-quality development of the maritime economy in 11 coastal provinces (cities and districts) in China from 2008 to 2020 and examines their regional disparities and dynamic evolution. The study reveals the following: (1) The high-quality development levels of the maritime economy in coastal provinces show a fluctuating upward trend, with different dimensions of advantages in each province. (2) The overall regional disparities exhibit a development trajectory of expansion followed by contraction, with a general trend in narrowing disparities. Currently, the southern maritime economic zone has the greatest internal differences, and the gap between the southern and northern maritime economic zones is relatively pronounced. (3) Significant fluctuations are observed in the disparities in high-quality development of the maritime economy between China and the three major maritime economic zones. The internal gaps within the northern and southern maritime economic zones have expanded to varying degrees, whereas the gaps within the eastern maritime economic zone have shown some convergence. (4) Inter-group mobility among provinces in different states of high-quality development of the maritime economy is low, and provinces in a low-level state exhibit a noticeable “low-end lock-in” phenomenon. This paper, through a timely spatial and temporal analysis of China’s high-quality development process of the maritime economy, aims to provide policy guidance for advancing the high-quality development of the maritime economy.

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Section: Discussionmentioning

confidence: 99%

Regional Disparities and Dynamic Distribution in the High-Quality Development of the Marine Economy

Zhang,

Wang

2024

Sustainability

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“…However, technological advances and innovative construction strategies can help mitigate the challenges and improve the performance of concrete structures in cold weather [145]. By employing advanced concrete mix designs [146], appropriate concreting techniques [147], protective measures and insulation [107], accelerating admixtures and chemical additives [148], advanced monitoring and quality control systems [149], and prefabrication and modular construction [150], construction professionals can overcome the challenges associated with cold weather construction. Water is one of the biggest risks related to concrete construction in hazardous environments experiencing low and freezing temperatures; ensuring proper drainage and waterproofing is therefore extremely important to avoid water-related issues and risks, as discussed in Table 3.…”

Section: Materials Technologies and Strategies For Cold Weathermentioning

confidence: 99%

An Overview of Smart Materials and Technologies for Concrete Construction in Cold Weather

Nilimaa

Zhaka

2023

Eng

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Cold weather conditions pose significant challenges to the performance and durability of concrete materials, construction processes, and structures. This paper aims to provide a comprehensive overview of the material-related challenges in cold weather concrete construction, including slow setting, reduced curing rate, and slower strength development, as well as frost damage, early freezing, and freeze–thaw actions. Various innovative materials and technologies may be implemented to address these challenges, such as optimizing the concrete mix proportions, chemical admixtures, supplementary cementitious materials, and advanced construction techniques. The paper also examines the impact of weather-related challenges for personnel, equipment, and machinery in cold environments and highlights the importance of effective planning, communication, and management strategies. Results indicate that the successful implementation of appropriate strategies can mitigate the challenges, reduce construction time, and enhance the performance, durability, and sustainability of concrete structures in cold and freezing temperatures. The paper emphasizes the importance of staying updated about the latest advancements and best practices in the field. Future trends include the development of smart and functional concrete materials, advanced manufacturing and construction techniques, integrated design, and optimization of tools, all with a strong focus on sustainability and resilience.

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“…The diagnosis system mainly refers to the indexes that describe the characteristics of a dam based on the structural features and monitoring arrangement of the dam. A diagnosis system is usually a recursive structure with multiple layers, including state layer (diagnosis target), section layer, project layer, effect quantity layer, and monitoring point layer [1], [2], [3]. Based on the monitoring data of effect quantities, the measurement of diagnosis indexes refers to the membership of diagnosis indexes to the health levels.…”

Section: Introductionmentioning

confidence: 99%

“…This method show strong subjective randomness and may lead to uncoordinated or inconsistent grades with limitation of expert knowledge. (2) semi-empirical method combined with monitoring data analysis; based on the qualitative and quantitative analysis of single-point monitoring data, diagnosis indexes are jointly given by expert experience and theoretical calculation, e.g., threshold methods based on structural calculation [9] and statistical analysis [10], [11], comparative analysis based on curve fitting of monitoring models [12], [13], methods combined with weight coefficients [2], [3], [14], etc. (3) The third method is not to directly determine the values of diagnosis indexes, but to establish a mathematical model to automatically generate diagnosis indexes, such as fuzzifying [15], [16], intervalizing [16], [17], [18], and other ways.…”

Section: Introductionmentioning

confidence: 99%

New Method for Measuring Diagnosis Indexes Based on Concept Lattices in Dam Health Diagnosis

Chen,

Tang,

2024

IEEE Access

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With multi-layers and multi-indexes, dam health diagnosis is an important way to diagnose the structural safety and health operation of dams. This study focuses on the measurement of diagnosis indexes in dam health diagnosis. The existing methods of constructing diagnosis indexes are mainly based on the subjective judgment of expert knowledge, and lack of consideration of the internal mapping relationship between diagnosis indexes and dam health levels. Therefore, it is necessary to introduce new theories and new methods to study the objective measurement of diagnostic indexes in combination with the characteristics of dam health diagnosis. Based on the Dempster-Shafer (D-S) evidence theory, a new concept lattices-based model for building basic probability assignments (BPAs) is proposed in this study. First, concept lattices under hesitant fuzzy linguistic term sets (HFLTSs) were established to formalize the qualitative and quantitative expression of expert knowledge. Then we defined a new distance of HFLTSs, named NWD. NWD is strict in mathematical definition and considers the non-overlapping HFLTSs. Based on NWD, the weight of the monitoring point for each health level was obtained through similarity analysis and finally transformed into the corresponding BPA. An engineering project demonstrated that the BPAs developed in this study could adequately describe the attributes of diagnosis indexes, forming reliable bases for the comprehensive diagnosis fusion. Simultaneously, the proposed method of building the BPA can significantly improve assignment efficiency, which can shed light on the development of dam operation behavior modelling.INDEX TERMS Basic probability assignment, concept lattice, dam health diagnosis, diagnosis index, D-S evidence theory.

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Comprehensive evaluation method for structural behavior of concrete dams in cold regions

Cited by 10 publications

References 33 publications

Regional Disparities and Dynamic Distribution in the High-Quality Development of the Marine Economy

Regional Disparities and Dynamic Distribution in the High-Quality Development of the Marine Economy

An Overview of Smart Materials and Technologies for Concrete Construction in Cold Weather

New Method for Measuring Diagnosis Indexes Based on Concept Lattices in Dam Health Diagnosis

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