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Mechanical properties of steel tubes filled with coal gangue concrete in a corrosive environment

Alexandria Engineering Journal 2025年 126卷 418-440页

作者： Zhang, Tong Zhu, Qingru Shan, Gao School of Civil Engineering Liaoning Technical University Liaoning Fuxin123000 China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150000 China

To achieve the in-situ utilization of coal gangue, coal gangue concrete filled steel tube (CGCFST) was applied in coal mine roadways as support structure. However, the reliability of the structure was negatively impacted by corrosive environment in coal mines. This study tested the axial compression performance of twenty-four circular CGCFST stubs with corrosion damage, considering the influence of coal gangue replacement rate and steel corrosion rate. The test results showed that the failure mode of the specimens was shear failure. The ultimate load, ductility, and stiffness of the CGCFST stub decreased with the increase of the corrosion rate and replacement rate, with corrosion rate having a more significant impact on the mechanical properties of the specimens. For the C30 CGCFST stub with a replacement rate of 100 %, when the corrosion rate is 30 %, the ultimate load, ductility, and stiffness of the CGCFST stub were reduced by 19.9 %, 48.8 %, and 27.3 %, respectively. Compared to high-strength concrete specimens, in addition to ductility, the effects of replacement rate and corrosion rate on the ultimate load and stiffness of low strength concrete were more significant. Finite element analysis was conducted to assess the impact of the steel ratio, material strength, and corrosion rate on the ultimate load of the CGCFST stub. The results indicated that concrete strength exerted the most significant influence on the ultimate load of the stub, suggesting that improving the strength of concrete is an effective strategy to ensure its safety. A design method for the ultimate load of CGCFST stubs in a corrosive environment was proposed. The CO2 emission of CGCFST stubs was evaluated, suggesting to use concrete with high strength and natural aggregates completely replaced by coal gangue in practical engineering. © 2025 The Authors

关键词： Impact strength

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Machine learning based damage state identification:A novel perspective on fragility analysis for nuclear power plants considering structural uncertainties

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Earthquake Engineering and Engineering Vibration 2025年第1期24卷 201-222页

作者： Zheng Zhi Wang Yong Pan Xiaolan Ji Duofa College of Civil Engineering Taiyuan University of TechnologyTaiyuan 030024China Key Lab of Structures Dynamic Behavior and Control(Harbin Institute of Technology) Ministry of EducationHarbin 150090China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of TechnologyHarbin 150090China

Seismic fragility analysis(SFA)is known as an effective probabilistic-based approach used to evaluate seismic *** are various sources of uncertainties associated with this approach.A nuclear power plant(NPP)system is an extremely important infrastructure and contains many structural uncertainties due to construction issues or structural deterioration during *** of structural uncertainties effects is a costly and time-consuming endeavor.A novel approach to SFA for the NPP considering structural uncertainties based on the damage state is proposed and *** results suggest that considering the structural uncertainties is essential in assessing the fragility of the NPP structure,and the impact of structural uncertainties tends to increase with the state of ***,machine learning(ML)is found to be superior in high-precision damage state identification of the NPP for reducing the time of nonlinear time-history analysis(NLTHA)and could be applied in the damage state-based ***,the impact of various sources of uncertainties is investigated through sensitivity *** Sobol and Shapley additive explanations(SHAP)method can be complementary to each other and able to solve the problem of quantifying seismic and structural uncertainties simultaneously and the interaction effect of each parameter.

关键词： seismic fragility analysis damage state structural uncertainties machine learning sensitivity analysis

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A logistic-Lasso-regression-based seismic fragility analysis method for electrical equipment considering structural and seismic parameter uncertainty

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Earthquake Engineering and Engineering Vibration 2025年第1期24卷 169-186页

作者： Cui Jiawei Che Ailan Li Sheng Cheng Yongfeng Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education School of Civil EngineeringHarbin Institute of TechnologyHarbin 150094China School of Ocean and Civil Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China China Electric Power Research Institute Beijing 100055China

Damage to electrical equipment in an earthquake can lead to power outage of power *** fragility analysis is a common method to assess the seismic reliability of electrical *** further guarantee the efficiency of analysis,multi-source uncertainties including the structure itself and seismic excitation need to be considered.A method for seismic fragility analysis that reflects structural and seismic parameter uncertainty was developed in this *** proposed method used a random sampling method based on Latin hypercube sampling(LHS)to account for the structure parameter uncertainty and the group structure characteristics of electrical ***,logistic Lasso regression(LLR)was used to find the seismic fragility surface based on double ground motion intensity measures(IM).The seismic fragility based on the finite element model of an±1000 kV main transformer(UHVMT)was analyzed using the proposed *** results show that the seismic fragility function obtained by this method can be used to construct the relationship between the uncertainty parameters and the failure *** seismic fragility surface did not only provide the probabilities of seismic damage states under different IMs,but also had better stability than the fragility ***,the sensitivity analysis of the structural parameters revealed that the elastic module of the bushing and the height of the high-voltage bushing may have a greater influence.

关键词： seismic fragility uncertainty logistic lasso regression ±1000 kV main transformer sensitivity analysis

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Study on Residents' Intentions to Purchase Prefabricated Housing in China

Study on Residents' Intentions to Purchase Prefabricated Hou...

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2024 International Conference on Construction and Real Estate Management: ESG Development in the Construction Industry, ICCREM 2024

作者： Zhou, Fanxi Zhou, Zhenzong Man, Qingpeng Wang, Yaowu School of Economics and Trade Henan Univ. of Technology Henan China Dept. of Construction Management Harbin Institute of Technology Harbin China Dept. of Construction Management Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin China

ISBN: (数字)9780784485910

ISBN: (纸本)9780784485910

Currently, with an increasingly serious environmental population and energy crisis, countries are actively exploring measures to reduce carbon emissions. Environmental protection and sustainable development have become hot points for research. As a high-consumption industry, the construction industry urgently needs to take measures to reduce its negative impacts on the environment. Prefabricated housing has the characteristic of a short construction period and is environmentally friendly. Therefore, it plays a vital role in China's sustainable development. At the same time, the residential industry is a key area for the development of prefabricated buildings. In order to better reveal the consumers' purchase intentions and promote the deeper development of prefabricated housing to bring greater social benefits, this study combines the theory of planned behavior (TPB) and the norm activation model (NAM) to explain the influencing factors of consumers' purchase of prefabricated housing, hoping to scientifically guide residents, and at the same time provide theoretical reference for policy formulation. © ASCE.

关键词： Carbon sequestration

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Experimental study of the axial compressive behavior of square cross-section UHPC-encased composite concrete columns

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Journal of Building Engineering 2025年 106卷

作者： Braveru, Cabral Sudentino Zhou, Wei School of Civil Engineering Harbin Institute of Technology Harbin150090 China Key Lab of Structures Dynamic Behavior and Control Ministry of Education School of Civil Engineering. Harbin Institute of Technology Harbin150090 China

This paper investigates the axial compression behavior of fifteen square cross-section UHPC-encased composite concrete columns. The specimens include nine columns with dual reinforcement cages (within both the UHPC encasement and concrete core), five columns with a single reinforcement cage (only within the UHPC encasement), and one unreinforced specimen serving as a baseline to assess the effect of reinforcement. The columns are designed with UHPC as the outer layer and conventional concrete as the inner core. The parameters investigated in this study include reinforcement cage configuration, stirrup ratio (the volumetric ratio of transverse reinforcement), UHPC-encasement thickness, and dimensions and placement of transverse grooves on the inner surface of the UHPC. The influence of these factors on compressive resistance was experimentally tested and complemented by a theoretical model. Results indicate that increasing the reinforcement cage, enhancing the stirrup ratio, increasing the UHPC thickness, and optimizing groove dimensions improve compressive resistance. However, changing groove spacing yielded only minimal improvement in the compressive strength of the composite columns. A modified calculation model, based on the ACI 318 standard and experimental data, was proposed to predict the effect of these parameters on the peak load calculation of the square cross-section UHPC-encased composite concrete columns under axial compression. © 2025

关键词： Reinforcement

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Building with Snow: Technical Exploration and Practice of Snow Materials and Snow Architecture

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Buildings 2025年第8期15卷 1277-1277页

作者： Sun, Jianfeng Zhang, Qingwen Zhang, Guolong Fan, Feng Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin150090 China

Focusing on the design and construction of snow structures, this paper explores the properties of snow materials, construction methods, and operation–maintenance strategies, aiming to demonstrate how to integrate architectural functionality, aesthetics, and structural reliability in snow architecture. It reviews current methods of snow material testing and numerical simulation, yet research on the material properties of machine-made snow remains limited. Current design trends in snow architecture emphasize diverse artistic expressions. After reviewing construction methods of existing snow buildings, the paper employs finite element analysis software to validate design schemes. Upon confirming structural feasibility, it further proposes a monitoring framework for snow structures. © 2025 by the authors.

关键词： Architectural design

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Extreme value characteristics of jacket-type offshore wind turbine dynamic response under wind-wave actions

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Ocean Engineering 2025年 329卷

作者： Zhang, Ziyang Liu, Jiabin Chen, Wen-Li Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin150090 China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China

Jacket-type offshore wind turbine (JOWT) operates in a marine environment where wind and wave interact. The dynamic characteristics of JOWT are significantly affected by the wind-wave coupling effect. To study the extreme value characteristics of structural responses, this research conducted scaled experiments on the 10 MW JOWT. The extreme value distribution of combined loads was constructed, and the environmental load factors were calculated for different reliability indices. The research results reveal that the tower top displacement and foundation shear exhibit distinct wind-wave coupling characteristics. For the tower top displacement, the maximum wave load combination factor is below 0.3. Wind load is the dominant load of the tower top displacement. The foundation shear is significantly influenced by wave load and should be divided into wind-dominated and wave-dominated zones for load combination design. The extreme value distribution of the combined load is significantly influenced by the wind and wave load correlation. As the correlation coefficient increases, the peak of the extreme value distribution of combined loads decreases while the distribution range expands. The environmental load factors are significantly influenced by wind-wave coupling effects. Compared to wind-only conditions, the environmental load factors significantly increase under wind-wave coupling effects. © 2025 Elsevier Ltd

关键词： Offshore wind turbines

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Functionality assessment of natural gas distribution networks in post-earthquake scenarios with widespread component failures

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Reliability Engineering and System Safety 2025年 262卷

作者： Wang, Heran Zhai, Changhai Ma, Liyang Song, Dongdong Xie, Lili Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin150090 China

Urban natural gas distribution networks are critical infrastructure systems that provide essential energy services to residential, industrial, and commercial sectors. However, these networks are highly vulnerable to earthquake-induced damage, leading to significant functionality loss and risks such as fires and explosions. To evaluate the functional status of natural gas pipeline networks under post-earthquake conditions, it is essential to develop a robust evaluation model capable of addressing large-scale component damage. This study proposes a natural gas pipeline network functionality assessment methodology that integrates islanding analysis to identify interconnected sub-networks, pressure-dependent demand modeling for user nodes, and a dual-control mechanism for gas source nodes to improve the accuracy of hydraulic calculations under accident conditions. Compared to traditional methods, the proposed approach provides a more accurate representation of natural gas pipeline network behavior under partial gas supply conditions. Validation on a representative natural gas pipeline network demonstrates its effectiveness in identifying and quantifying functional losses during extensive component failures. Comparative analysis reveals that traditional methods tend to overestimate network functionality under severe damage conditions, underscoring the advantages of the proposed approach. These findings confirm the methodology's suitability for evaluating functionality in scenarios of severe disruption. © 2025 Elsevier Ltd

关键词： Natural gas pipelines

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Axial mechanical and environmental properties of CFRP-confined coal gangue sand concrete

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Journal of Building Engineering 2025年 108卷

作者： Tong, Zhang Jiankun, Hou Shan, Gao School of Civil Engineering Liaoning Technical University Liaoning Fuxin123000 China Shaanxi Key Laboratory of Safety and Durability of Concrete Structures Xijing University Xi'an710123 China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150000 China

To improve the mechanical properties of coal gangue sand (GS) concrete, carbon fiber reinforced plastics (CFRP) was used to confine the concrete. In this paper, the effects of the coal gangue sand replacement rates (rGS), core concrete strength grade, and the number of CFRP layers (p) on the axial compressive mechanical properties of CFRP-confined coal gangue sand (CCGS) concrete were investigated experimentally. The experimental results showed that rGS had a small impact on the failure mode of the CCGS concrete, which was the explosive failure. The ultimate bearing capacity (Nu, e) of the CCGS concrete decreased (maximum is 8.4 %) and increased (maximum is 134.1 %) respectively, as the rGS and p increased. With the increase of the rGS, the peak longitudinal strain of the CCGS concrete increases. The more the number of the CFRP layers, the better the lateral confined effect on the CCGS concrete. The rGS has no significant effect on the circumferential strain efficiency coefficient, which is approximately 0.67. The highest utilization efficiency of the CFRP is 2 layers. Through finite element analysis, CFRP contributes the most to the ultimate bearing capacity of the CCGS concrete, increasing by 21.9 %, while GFRP contributes the least by 10.5 %. Increasing the cross-sectional dimensions will increase the Nu, e, but will not enhance the axial compressive strength of the confined core GS concrete. The design methods of the ultimate bearing capacity and constitutive model of the CCGS concrete were proposed and validated. A full-range load prediction analysis showed that increasing rGS can improve the confinement effect of the CCGS concrete. Finally, through carbon emission calculation analysis, it was recommended to increase the number of CFRP layers while ensuring the large-scale consumption of coal gangue from the perspective of the social and economic benefits. © 2025 Elsevier Ltd

关键词： Compressive strength

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A novel porous shock absorption layer for tunnels: Shock absorption performance and parameter analysis

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Earthquake Engineering and Engineering Vibration 2025年第2期24卷 437-450页

作者： Zhou Tonglai Dong Changsong Li Shuang Sun Qiangqiang Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of TechnologyHarbin 150090China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of TechnologyHarbin 150090China State Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment CCCC First Highway Consultants Co.Ltd.Xi’an 710075China Institute of Geotechnical Engineering College of Civil Engineering and ArchitectureHebei UniversityBaoding 017002China

A novel porous shock absorption layer is put forward in this study, and the shock absorption performance of the porous shock absorption layer is evaluated based on three-dimensional pseudo-static analysis. The modified reaction acceleration method is adopted and validated in the three-dimensional model. Seven ground motions are selected and the peak ground acceleration is adjusted to 0.2 g, 0.4 g and 0.6 g. The impact of the void ratio and thickness of the porous shock absorption layer is studied, while the surrounding rock grade and tunnel depth are also investigated. The numerical results show that the porous shock absorption layer has good shock absorption performance and can effectively reduce the maximum internal force of the secondary lining, but it cannot reduce the maximum horizontal relative displacement of the secondary lining. The circumferential rubber strip in the porous shock absorption layer will reduce shock absorption performance. The results of parameter analysis indicate that the shock absorption performance of the porous shock absorption layer increases with the increase of the void ratio and thickness, and it has good shock absorption performance under different surrounding rock grades and tunnel depths.

关键词： tunnel porous shock absorption layer shock absorption performance reaction acceleration method parameter analysis

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