ce/papers最新文献

{"title":"Seepage Analyses of Tailings Dam Using 3D Saturated-Unsaturated and Equivalent Seepage Method","authors":"Dewen Chen,&nbsp;Xiao Yue,&nbsp;Hongwei Zhang,&nbsp;Zhenzhong Shen","doi":"10.1002/cepa.3133","DOIUrl":"https://doi.org/10.1002/cepa.3133","url":null,"abstract":"<p>Seepage safety control of tailings dam is the key technology for preventing leakage and ensuring dam safety to avoid geo-hazards and protect the ecological environment. To obtain an accurate seepage field of the whole tailings dam area, especially the modeling of geotechnical mat, a 3D saturated-unsaturated seepage method is used to calculate the seepage filed, in which the phreatic surface is captured by a cut-off negative pressure method via a penalty function with a parameter. An equivalent seepage model of a geotechnical mat is established to calculate accurately its seepage characteristic. The equivalent seepage model is applied to analyze the seepage field of a tailings dam in China. The seepage field is also investigated when the geotechnical mat cannot work well. The seepage surface will be left up, when the geotechnical mat is damaged.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"8 2","pages":"409-417"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143646096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ecological Environmental Impact Assessment of Dam Failure Based on Combined Weighting-Expandable Cloud Coupling Model","authors":"Yanchun Li,&nbsp;Ling Lu,&nbsp;Peijiang Cong,&nbsp;Liang Wang,&nbsp;Ximing Huang,&nbsp;Jiachen Hou,&nbsp;Gaowei Liu","doi":"10.1002/cepa.3273","DOIUrl":"https://doi.org/10.1002/cepa.3273","url":null,"abstract":"<p>Reservoir dam failure is a kind of sudden and highly harmful disaster, and the comprehensive assessment of the severity of dam failure is an important part of dam risk assessment and risk management, and the current research on the ecological environmental impact of dam failure is obviously insufficient. According to the characteristics of reservoir dam failure, the main ecological environmental impact of reservoir failure is analyzed, and on the basis of systematically collecting the data on the consequences of reservoir dam failure, an index system and quantitative method for the assessment of the ecological environmental impact of reservoir failure are established, aiming at the fixed weight of the index that is artificially set subjectively in the traditional comprehensive evaluation of the consequences of dam failure, and the incompatibility between the value of the evaluation index and the evaluation grade standard, based on the existing laws and regulations and industry norms, the principle of minimum information identification is used to optimize the weight of the index. According to the characteristics of dam-break environmental factors, a comprehensive evaluation model based on combination weighted extension-cloud coupling is constructed by using the advantages of extension to solve incompatibility problems and cloud model to deal with randomness and fuzziness. The model is applied to the reservoir. The results show that: 1) After the optimization of the minimum information identification principle, the index weights obviously balance the subjective and objective weights, and the obtained comprehensive weights solve the problem that the subjectivity and objectivity of the indicators cannot be well unified, which is more in line with the actual engineering needs; 2) The comprehensive assessment level of the ecological environmental impact of reservoir failure is basically consistent with the evaluation level calculated by other evaluation models, and the degree of differentiation is better, which shows that the proposed model has good practicability, and provides a new method for the comprehensive assessment of the ecological environmental impact of dam failure.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"8 2","pages":"1899-1909"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143646185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Test to determine lateral constraint stiffness of angle steel with in-situ nondestructive reinforcement for transmission tower","authors":"Bo Wang,&nbsp;Ya Dai,&nbsp;Weizhou Xu","doi":"10.1002/cepa.3170","DOIUrl":"https://doi.org/10.1002/cepa.3170","url":null,"abstract":"<p>As transmission lines expand and capacities increase, transmission towers are facing heavier loads. Older designs can't meet new standards. In addition, extreme weather increases the risk of tower collapse. Thus, enhancing the load-bearing capacity of existing towers is important. This paper proposed a new in-situ nondestructive reinforcement technology for strengthening the lateral constraint stiffness of angle steel in transmission tower. The proposed reinforcement method does not require drilling on the original material, making it easy to implement. Five specimens with different reinforcement length were fabricated and tested under out-plan loads. The failure mode, lateral constraint stiffness and strain development of the angle steel with in-situ nondestructive reinforcement were discussed. The effect of critical parameters (i.e., axial tension on steel, reinforcement length and connection method) on the lateral constraint stiffness of the reinforced angle was investigated. Finally, the reinforcement effect of the proposed in-situ nondestructive reinforcement was further discussed through comparing with the unreinforced angle. The results reveal that, the proposed reinforcement method is quite convenient to install. It can effectively strength the lateral constraint stiffness of steel angle, and has the same reinforcement effect on the bearing capacity of angle steel compared with the traditional welding reinforcement method. The lateral constraint stiffness of steel angle becomes larger as axial tension enlarges. The reinforcement effect evidently increases as the reinforcement length increases, and the lateral constraint stiffness can be increased up to 97.56% compared to the unreinforced angle.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"8 2","pages":"809-819"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143646209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of Cloud-based High Speed Computing Platform for Concrete-face Rockfill Dam","authors":"Yu Xiao,&nbsp;Chengjia Huang,&nbsp;Ge Yang,&nbsp;Tianshen Chen","doi":"10.1002/cepa.3268","DOIUrl":"https://doi.org/10.1002/cepa.3268","url":null,"abstract":"<p>The finite element calculation of concrete-face rockfill dam is a complex and computationally intensive process. Various commercial finite element calculation softwares have problems such as limited computing performance due to computing power of client CPU, difficult to maintain and upgrade, inability to meet mobile office needs, high cost of genuine software and so on. In order to improve the performance and convenience of traditional three-dimensional finite element calculation, this paper has developed a cloud-based high speed computing platform that can perform pre-processing calculations and post-processing result cloud image display. The seepage analysis and calculation of a concrete face rockfill dam were carried out through the platform, and the results showed that the total water head and seepage field of the dam followed general laws. The seepage calculation results were close to the measured values, providing intuitive support for the analysis of the operating status of the concrete face rockfill dam. The platform design method proposed in this article has been explored in the field of three-dimensional finite element analysis of concrete-face rockfill dams, providing auxiliary decision-making guidance for the design, construction, and operation management of concrete-face rockfill dams.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"8 2","pages":"1840-1851"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence mechanism of the installation position of friction support on the dynamic characteristic of the subway station structure","authors":"Xuechuan Han,&nbsp;Hongliang Wang,&nbsp;Wenting Bai","doi":"10.1002/cepa.3166","DOIUrl":"https://doi.org/10.1002/cepa.3166","url":null,"abstract":"<p>The aim of this research is to investigate the effect of friction pendulum isolator on dynamic performance of subway station structure. To this end, an actual bi-story, bi-span subway station structure is taken as the research object, a three-dimensional model considering the interaction effect between soil and subway station was proposed by using FEM software. Based on the FEM model, the seismic performance of the subway station structure with the friction pendulum bearings mounted on different positions was employed to elucidate the seismic isolation mechanism. It showed that: (1) The friction pendulum bearings can significantly reduce the relative displacement of the middle column and increase the anti-shear deformation capacity of the middle column. (2) The friction pendulum bearing can change the stress distribution of the subway station, and reduce the magnitude and concentration of stress of the columns in the isolation layer. (3) The friction pendulum bearings make the structure have more reasonable bearing capacity, as they can reduce the shear force and bending moment of the middle column significantly. It is suggested that the isolation bearing should be installed on the middle column of the ground floor of the station.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"8 2","pages":"760-770"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Staged Tensioning Control of Precast Box Girder Prestressing Based on Orthogonal Experimental Analysis","authors":"Yuanxun Zheng,&nbsp;Jinhan Zhang,&nbsp;Jingjiang Wu,&nbsp;Pan Guo","doi":"10.1002/cepa.3240","DOIUrl":"https://doi.org/10.1002/cepa.3240","url":null,"abstract":"<p>In the field of bridge assembly construction, longer girder storage periods and high temperature and humidity vaporization environments may lead to increased prestress losses in box girders at later stages. In order to reduce the prestressing loss of prefabricated box girders, this paper relies on the actual engineering, through the orthogonal experimental design method, adopts the L16 orthogonal table for the initial tensioning condition of prefabricated box girders, and simulates Maximum stresses of box girders in different working conditions by utilizing the finite element software ABAQUS. The main factors affecting the box girder stresses were determined by polar analysis and one-way ANOVA. The results of the study show that the prestressing efficiency of the box girder can be improved by symmetrically tensioning 8 or 10 steel bundles when the concrete strength reaches 70% or 75% while meeting the concrete strength requirements.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"8 2","pages":"1555-1562"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic Analysis of Long-span Suspension Bridge and Vehicle System under Un-uniform Seismic Excitation","authors":"Xiaoyuan Wang,&nbsp;Shirong Chen","doi":"10.1002/cepa.3193","DOIUrl":"https://doi.org/10.1002/cepa.3193","url":null,"abstract":"<p>With the development of high-speed railway construction, there are more and more long-span railway bridges, which significantly increases the probability of trains running on the bridge during an earthquake. The impact of seismic loads on the safety of trains running on the bridge cannot be ignored. By studying the dynamic response of the vehicle-bridge system under seismic action, we can try to avoid derailment and other events caused by earthquakes as much as possible. This paper mainly focuses on three aspects: seismic wave input, structural characteristics, and vehicle-bridge system response analysis, to study the dynamic response of the vehicle-bridge system under the action of seismic waves considering the traveling wave effect. Through the dynamic analysis of the vehicle-bridge system under non-uniform seismic action for the Oujiang suspension bridge. The research found that: (1) The impact on the vehicle-bridge system is not significant among different seismic wave propagation velocities; (2) With the increase of train speed, the derailment coefficient and the wheel load reduction rate of the train increase.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"8 2","pages":"1034-1041"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on Height Feature Extraction Method of Tank Pool Fire Based on Improved Mask R-CNN","authors":"Jungang Zhao,&nbsp;Jiangang Sun","doi":"10.1002/cepa.3279","DOIUrl":"https://doi.org/10.1002/cepa.3279","url":null,"abstract":"<p>Tank pool fires are a hazardous form of fire, and their height feature plays a critical role in the assessment of thermal radiation. Using Mask R-CNN as the benchmark network, this study introduces a deformable convolution structure and optimizes the loss function to achieve accurate instance segmentation of tank pool fires, extracting segmentation masks and then calculating the fire height using reference object sizes. The proposed improvements were evaluated on a self-built dataset, and the experimental results verified the effectiveness of the method. Compared to the baseline model, the improved Mask R-CNN increased AP50 and AP75 by 6.29% and 2.48%, respectively, significantly enhancing the segmentation performance of tanks and pool fires. Compared with three other segmentation algorithms, the method improved mAP by 10.95%, 7.05%, and 9.49% over Unet, Deeplab, and PSPNet, respectively, demonstrating its strong competitiveness in pool fire target segmentation.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"8 2","pages":"1958-1965"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research and Application of Hydropower Dam Deformation Monitoring Model Based on HBA-GRU","authors":"Yong Huang,&nbsp;Xuan Song,&nbsp;Cun Xin,&nbsp;Haichen Zhu,&nbsp;Jintao Song","doi":"10.1002/cepa.3275","DOIUrl":"https://doi.org/10.1002/cepa.3275","url":null,"abstract":"<p>The nonlinear features of dam deformation is one of the key factors that limits the accurate prediction of dam deformation. On this promise, this paper proposes a dam deformation prediction model that is applicable to the nonlinear features of dams. In particular, the Honey Badger Optimization Algorithm (HBA), which has strong seeking ability and high convergence accuracy, is integrated with the deep learning Gated Recurrent Unit (GRU) model, which is advantageous in nonlinear prediction problems, to generate HBA-GRU for dam deformation monitoring. Experiments were carried out to apply the proposed method in the measured deformation monitoring of panel rock fill dams at Gongboxia Hydropower Station, and the effectiveness of the proposed method was compared with the existing prediction methods, such as LSTM, GRU, and HBA-LSTM. The results show that compared with the existing prediction methods, the proposed method performs better than the LSTM, GRU and HBA-LSTM algorithms, HBA-GRU algorithm, and can provide technical support for dam deformation monitoring.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"8 2","pages":"1920-1932"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the Attenuation Law of Anti-skid Performance of Pavement in Different Maintenance Projects","authors":"Rong Chang,&nbsp;Qing Ma,&nbsp;Jie Wang","doi":"10.1002/cepa.3226","DOIUrl":"https://doi.org/10.1002/cepa.3226","url":null,"abstract":"<p>The lateral force coefficient is used both domestically and internationally to evaluate the anti-skid performance of asphalt pavement on highways. This article studies the attenuation law of anti-skid performance of different types of maintenance engineering easy to compact thin layer cover, micro surface treatment, in-situ thermal regeneration and semi open graded thin layer cover. The results indicate that the variation of SFC in different maintenance projects is directly influenced by the traffic level, and the larger the traffic level, the faster the attenuation of SFC. The ranking of the anti-skid and durability performance of maintenance projects under heavy traffic level is: easy compact thin layer cover, semi open graded ultra-thin cover&gt;in situ geothermal regeneration, and micro surface treatment. The ranking of the anti-skid and durability performance of maintenance projects under the medium transportation level is: easy to compact thin layer cover&gt;micro surface&gt;inplace geothermal regeneration.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"8 2","pages":"1395-1402"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}