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学者姓名:姜绍飞
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相比于钢筋混凝土(RC)管廊,超高性能混凝土(UHPC)管廊可以减小结构板厚,获得更大使用空间,并可以提升耐久性和使用寿命.为比较两种管廊在受力情况下的损伤机理和破坏模式,以及开裂荷载、刚度、极限承载力和接缝张开量等指标,进行了预应力筋连接UHPC管廊和RC管廊的静力作用下的受力性能试验,并通过有限元模型分析了预应力度对UHPC管廊纵向刚度的影响规律,研究了纵向刚度的简化计算方法.研究结果表明:相较于RC管廊,UHPC管廊的开裂荷载、屈服荷载和极限荷载分别提高了 84%、36%、45.5%;UHPC管廊抗弯刚度大于RC管廊;在达到极限荷载时,UHPC管廊接头竖向错位相较于RC管廊小38.0%,说明UHPC管廊接头性能优于RC管廊,根据有限元分析得到的刚度计算式可为UHPC管廊的设计计算提供依据.
Keyword :
UHPC UHPC 承载力 承载力 抗弯刚度 抗弯刚度 接头 接头 破坏模式 破坏模式 综合管廊 综合管廊 预应力 预应力
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GB/T 7714 | 朱三凡 , 胡超 , 夏樟华 et al. 预应力连接UHPC预制拼装管廊受力性能试验研究 [J]. | 应用基础与工程科学学报 , 2025 , 33 (1) : 289-299 . |
MLA | 朱三凡 et al. "预应力连接UHPC预制拼装管廊受力性能试验研究" . | 应用基础与工程科学学报 33 . 1 (2025) : 289-299 . |
APA | 朱三凡 , 胡超 , 夏樟华 , 许有胜 , 姜绍飞 . 预应力连接UHPC预制拼装管廊受力性能试验研究 . | 应用基础与工程科学学报 , 2025 , 33 (1) , 289-299 . |
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为了研究柱高比(即为双柱墩中 2根不同高度柱的柱高之比)对非等高RC双柱墩顺桥向弯扭性能的影响,对 2个柱高比不同的非等高RC双柱墩在压弯扭复合受力下进行了拟静力加载试验,得到了双柱墩试件的剪力-位移滞回曲线、扭矩-扭转角滞回曲线以及相应的骨架曲线.基于Abaqus建立了非等高双柱墩的有限元模型,并用试验结果验证了其准确性,随后开展了参数分析,研究柱高比、轴压比和配箍率对弯扭作用下的非等高RC双柱墩顺桥向抗震性能的影响.研究结果表明:柱高比的减小会增大双柱墩顺桥向抗弯承载力,降低了构件的抗扭耗能和抗扭承载力;随着柱高比的减小,扭转效应增强,降低了非等高双柱墩的延性变形能力,且扩大了非等高双柱墩的损伤区域;为避免非等高双柱墩中的矮柱先进入弯剪破坏,建议其柱高比不小于 0.67;轴压比的增大降低了弯扭复合作用下非等高双柱墩的抗弯承载力;增大配箍率可显著提高试件抗扭承载力,对可能受扭的双柱墩可适当增大配箍率.
Keyword :
弯扭复合作用 弯扭复合作用 抗震性能 抗震性能 有限元分析 有限元分析 柱高比 柱高比 钢筋混凝土非等高双柱墩 钢筋混凝土非等高双柱墩 顺桥向 顺桥向
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GB/T 7714 | 曾兴贵 , 谢宝雄 , 姜绍飞 . 非等高RC双柱墩顺桥向弯扭性能试验研究及有限元分析 [J]. | 工程力学 , 2025 , 42 (3) : 250-261 . |
MLA | 曾兴贵 et al. "非等高RC双柱墩顺桥向弯扭性能试验研究及有限元分析" . | 工程力学 42 . 3 (2025) : 250-261 . |
APA | 曾兴贵 , 谢宝雄 , 姜绍飞 . 非等高RC双柱墩顺桥向弯扭性能试验研究及有限元分析 . | 工程力学 , 2025 , 42 (3) , 250-261 . |
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为了掌握地震作用下古建木结构由细观材料到宏观结构的损伤机理和破坏状态,并对其损伤程度做出全面而合理的评价,提出了古建木结构跨尺度损伤演化分析方法,包括多尺度数值模型和多尺度一致性损伤模型.多尺度数值模型采用多点约束法来协调跨尺度界面变形,能同时描述局部损伤细节和整体力学行为;损伤模型以广义力-广义位移和抗震性能水准理论为基础,通过试验拟合分析来统一各层次损伤.以榫卯节点拟静力试验和多层古建木框架振动台试验为分析对象,详细阐述了跨尺度损伤演化分析方法的过程和结果.通过所提出的多尺度分析方法,可以为既有古建木结构抗震鉴定给出从局部材料、构件到整体结构的各层级评估结果,并揭示其之间的演化规律,为后期加固修复提供科学依据.
Keyword :
古建筑木结构 古建筑木结构 地震损伤模型 地震损伤模型 有限元仿真分析 有限元仿真分析 跨尺度损伤演化分析 跨尺度损伤演化分析
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GB/T 7714 | 吴铭昊 , 王永建 , 姜绍飞 . 古建木结构跨尺度地震损伤演化分析方法研究 [J]. | 地震工程与工程振动 , 2025 , 45 (1) : 177-186 . |
MLA | 吴铭昊 et al. "古建木结构跨尺度地震损伤演化分析方法研究" . | 地震工程与工程振动 45 . 1 (2025) : 177-186 . |
APA | 吴铭昊 , 王永建 , 姜绍飞 . 古建木结构跨尺度地震损伤演化分析方法研究 . | 地震工程与工程振动 , 2025 , 45 (1) , 177-186 . |
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Due to a lack of seismic design, traditional timber structures make their mortise and tenon joints susceptible to seismic action. To date, there are limited mortise and tenon joints strengthening techniques that are efficient and safe. This study proposed a novel assembled hoop of adjustable stiffness to enhance the seismic resilience of joints. To evaluate the efficacy of this reinforcing technique, two 1/2 scaled Chuan-dou timber structural models were designed, namely intact and reinforced models. The comparative analysis of these models was conducted by shaking table tests. Under a seismic intensity of 8.0, the dynamic amplification factor of the reinforced model decreased by 2.9 % compared to the intact model, and the maximum displacement response decreased by 27 %. This indicates that the seismic performance of the reinforced structure was restored to the same level as the intact structure. Additionally, the interstory drift was reduced from 1/33-1/35. This indicates that the proposed reinforcement technique is feasible and effective in the seismic performance and local joints energy dissipation for the Chuan-dou timber structure.
Keyword :
Assembling hoop Assembling hoop Chuan-dou timber structure Chuan-dou timber structure Reinforcement technology Reinforcement technology Seismic performance Seismic performance Shaking table test Shaking table test
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GB/T 7714 | Ge, Ziyi , Jiang, Shaofei , Cai, Wangxin et al. Shaking table test on Chuan-dou timber structures reinforced by assembled hoop of adjustable stiffness [J]. | STRUCTURES , 2025 , 76 . |
MLA | Ge, Ziyi et al. "Shaking table test on Chuan-dou timber structures reinforced by assembled hoop of adjustable stiffness" . | STRUCTURES 76 (2025) . |
APA | Ge, Ziyi , Jiang, Shaofei , Cai, Wangxin , Song, Hualin , Shen, Sheng . Shaking table test on Chuan-dou timber structures reinforced by assembled hoop of adjustable stiffness . | STRUCTURES , 2025 , 76 . |
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为探究外包纤维增强复合材料(FRP)加固墩接木柱的加固效果和工作机制,考虑不同纤维布和不同墩接方式等因素影响,开展10根墩接木柱的轴压加载试验.对比分析3种FRP布(AFRP,BFRP,CFRP)、4种不同墩接方式(巴掌榫、刻半榫、抄手榫和直榫)下加固柱的破坏模式和力学性能.结果表明:未采用FRP布加固的传统墩接柱表现为拼接缝木材开裂和开裂后的墩接区木材压屈折断,而FRP布加固后,墩接区整体性良好,破坏主要发生在墩接口,表现为木材压溃和纤维布褶皱;传统墩接柱承载力仅恢复至42% ~69%,刚度恢复至43% ~65%;FRP布加固后,轴压承载力可恢复至完好木柱的75% ~100%,刚度可恢复至66% ~107%,延性提升24% ~96%,加固柱轴压性能和变形能力得到有效的恢复或提高,且刚度退化不明显;此外,有限元仿真得到的荷载位移曲线及力学指标与试验结果吻合良好.FRP加固墩接木柱的轴压力学性能良好,可为传统木结构建筑的修缮和木柱的墩接加固提供借鉴和参考.
Keyword :
刚度 刚度 墩接 墩接 巴掌榫 巴掌榫 延性 延性 抄手榫 抄手榫 直榫 直榫 纤维布 纤维布
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GB/T 7714 | 徐杰 , 姜绍飞 . 纤维布加固墩接木柱轴压试验 [J]. | 哈尔滨工业大学学报 , 2024 , 56 (2) : 77-85 . |
MLA | 徐杰 et al. "纤维布加固墩接木柱轴压试验" . | 哈尔滨工业大学学报 56 . 2 (2024) : 77-85 . |
APA | 徐杰 , 姜绍飞 . 纤维布加固墩接木柱轴压试验 . | 哈尔滨工业大学学报 , 2024 , 56 (2) , 77-85 . |
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Underwater pile-pier structures are important components of bridges. Various surface defects occur on these structures due to their complex hydrological environment. Existing methods for the visual detection of such defects have two main issues: (1) Underwater images are blurred, and the colors are severely distorted; (2) the size of defects cannot be quantitatively identified, and the detection efficiency is low. To solve these problems, this paper proposes a method to extract the contours of underwater pile-pier surface defects by combining an image fusion enhancement algorithm with a deep learning model. First, a pixel-level image fusion algorithm based on point sharpness weights is used, which can fuse two single enhanced images as well as significantly improve image contrast while ensuring effective color correction. Second, the DeepLabv3+ semantic segmentation network model is improved in terms of weight, such that the number of weight parameters required for the model can be reduced as much as possible while maintaining the accuracy. Next, an open-source dataset of surface defects in building structures is used to train the backbone feature extraction network layer, and the transfer learning method is applied to the detection task of the object domain. Finally, the image dataset collected from underwater experiments and practical engineering works is used to train the light-weight improved model, establish the underwater pile-pier surface defect contour extraction model, and then verify and test the models. In addition, comparisons focusing on three aspects, namely, comparison with five other commonly used algorithms, comparison of detection results with and without image fusion, and comparison with and without noise effects, are made to verify the robustness and effectiveness of the proposed method. The results show that the image fusion enhancement algorithm proposed in this paper can effectively enhance the detailed features of the defect image contours, and the light-weight improved model has the highest recognition accuracy and can maintain high detection efficiency and robustness. This implies that the proposed method is suitable for the quantitative detection of the surface defect contours of underwater pile-pier structures implanted in small underwater robots for practical bridge structures. © 2024 Chang'an University. All rights reserved.
Keyword :
Deep learning Deep learning Efficiency Efficiency Extraction Extraction Feature extraction Feature extraction Image enhancement Image enhancement Image fusion Image fusion Learning systems Learning systems Multilayer neural networks Multilayer neural networks Network layers Network layers Object detection Object detection Piers Piers Semantics Semantics Statistical tests Statistical tests
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GB/T 7714 | Wang, Wei , Jiang, Shao-Fei , Song, Hua-Lin et al. Extracting Surface Defect Contours of Bridge Underwater Pile-pier Structures based on Lightweight Network and Transfer Learning [J]. | China Journal of Highway and Transport , 2024 , 37 (2) : 88-99 . |
MLA | Wang, Wei et al. "Extracting Surface Defect Contours of Bridge Underwater Pile-pier Structures based on Lightweight Network and Transfer Learning" . | China Journal of Highway and Transport 37 . 2 (2024) : 88-99 . |
APA | Wang, Wei , Jiang, Shao-Fei , Song, Hua-Lin , Li, Peng-Ze , Wang, Sheng-Xian , Su, Zhcn-Heng . Extracting Surface Defect Contours of Bridge Underwater Pile-pier Structures based on Lightweight Network and Transfer Learning . | China Journal of Highway and Transport , 2024 , 37 (2) , 88-99 . |
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As a no-disturbance integrated-retrofitting technique, an external rocking frame was widely used on reinforced concrete (RC) structures. Yet, with the increasing demand for seismic strengthening of existing buildings, it has become a concern to evaluate the seismic strengthening schemes based on seismic resilience. Firstly, the dynamic equation of the structural system was derived, and the deformation control mechanism was revealed; thus, the corresponding design method was put forward for the rocking frame reinforcement. Secondly, after soft-first-floor structures were reinforced by rocking frames, the evaluation method of the reinforcement scheme was investigated based on seismic resilience. Finally, the feasibility of the assessment method was verified by a soft-first-floor frame structure, and a comparison was made between the method proposed in this paper and the conventional method. The results find that the soft-first-floor structure reinforced by the rocking frame increased by 10% in the inter-layer displacement and improved by 55.6% and 63.0% in the injury and mortality rates, compared to the buckling-restrained brace scheme. This indicates that the reinforcement scheme of soft layer structures with rocking frames is feasible and effective, and the reinforcement evaluation method proposed in this paper can quantitatively reflect the improvement in seismic performance.
Keyword :
buckling-restrained brace frame buckling-restrained brace frame rocking frame rocking frame seismic resilience seismic resilience soft-first-story soft-first-story
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GB/T 7714 | Jiang, Shaofei , Chen, Qihan , Li, Chenyang et al. Assessment of Soft-First-Floor Structures Reinforced by Rocking Frame Based on Seismic Resilience [J]. | BUILDINGS , 2024 , 14 (1) . |
MLA | Jiang, Shaofei et al. "Assessment of Soft-First-Floor Structures Reinforced by Rocking Frame Based on Seismic Resilience" . | BUILDINGS 14 . 1 (2024) . |
APA | Jiang, Shaofei , Chen, Qihan , Li, Chenyang , Song, Hualin , Lin, En , Fu, Chong . Assessment of Soft-First-Floor Structures Reinforced by Rocking Frame Based on Seismic Resilience . | BUILDINGS , 2024 , 14 (1) . |
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Due to the low strength and poor durability of plain soil, and the roughly⁃ estimated proportion of modified materials determined from craftsman’ s experience, the surface of rammed earth (RE) is always susceptible to cracking and spalling. Hence, the mix proportion of modified RE (MRE) shall be designed based on the parameters of actual soil and reasonable testing method. Most existing studies are limited to obtaining a single performance index⁃based optimum mix proportion of MRE. However, the mix proportion of actual MRE shall be optimized by synchronously considering multiple mechanical and durability indexes, and meanwhile the relative importance of variables in different regions and climatic conditions shall be evaluated. Furthermore, in the existing researches, only the optimum group is determined from several predefined mix proportions, which is different from the optimum mix proportion within the preset content range of the modified material. In this work, a design method of determining the optimum mix proportion of MRE is proposed by combining the mechanical and durability performance indexes. The design method includes 1) selection principles of earth material and identification method of soil properties; 2) a multi⁃indexes⁃based comprehensive weighting method of MRE; 3) comparison and optimization of the mix proportion of modified MRE based on weighted score and regression analysis. The proposed method screens out the appropriate mix proportion of MRE by adjusting the index weight according to the varying importance of indexes. Through the optimized design, the optimum mix proportion of each modified material within the preset content range can be acquired. Based on the designed example, it is validated that the optimum mix proportion of MRE can indeed be determined by the proposed method. © 2024 Chinese Society of Civil Engineering. All rights reserved.
Keyword :
Design Design Durability Durability Regression analysis Regression analysis Soils Soils Soil testing Soil testing
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GB/T 7714 | Shen, Sheng , Sun, Yu , Wang, Yao et al. Design method for optimum mix proportion of modified rammed earth based on combination of mechanical and durability performance indexes [J]. | China Civil Engineering Journal , 2024 , 57 (5) : 1-14 . |
MLA | Shen, Sheng et al. "Design method for optimum mix proportion of modified rammed earth based on combination of mechanical and durability performance indexes" . | China Civil Engineering Journal 57 . 5 (2024) : 1-14 . |
APA | Shen, Sheng , Sun, Yu , Wang, Yao , Jiang, Shaofei , Zhang, Ying , Fu, Xufeng et al. Design method for optimum mix proportion of modified rammed earth based on combination of mechanical and durability performance indexes . | China Civil Engineering Journal , 2024 , 57 (5) , 1-14 . |
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The quality of underwater bridge piers significantly impacts bridge safety and long-term usability. To address limitations in conventional inspection methods, this paper presents a sonar-based technique for the three-dimensional (3D) reconstruction and visualization of underwater bridge piers. Advanced MS1000 scanning sonar is employed to detect and image bridge piers. Automated image preprocessing, including filtering, denoising, binarization, filling, and morphological operations, introduces an enhanced wavelet denoising method to accurately extract the foundation contour coordinates of bridge piers from sonar images. Using these coordinates, along with undamaged pier dimensions and sonar distances, a model-driven approach for a 3D pier reconstruction algorithm is developed. This algorithm leverages multiple sonar data points to reconstruct damaged piers through multiplication. The Visualization Toolkit (VTK) and surface contour methodology are utilized for 3D visualization, enabling interactive manipulation for enhanced observation and analysis. Experimental results indicate a relative error of 13.56% for the hole volume and 10.65% for the spalling volume, demonstrating accurate replication of bridge pier defect volumes by the reconstructed models. Experimental validation confirms the method's accuracy and effectiveness in reconstructing underwater bridge piers in three dimensions, providing robust support for safety assessments and contributing significantly to bridge stability and long-term safety assurance.
Keyword :
sonar imaging sonar imaging three-dimensional reconstruction three-dimensional reconstruction underwater bridge pier underwater bridge pier
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GB/T 7714 | Luo, Jianbin , Jiang, Shaofei , Zeng, Yamian et al. Three-Dimensional Reconstruction and Visualization of Underwater Bridge Piers Using Sonar Imaging [J]. | SENSORS , 2024 , 24 (14) . |
MLA | Luo, Jianbin et al. "Three-Dimensional Reconstruction and Visualization of Underwater Bridge Piers Using Sonar Imaging" . | SENSORS 24 . 14 (2024) . |
APA | Luo, Jianbin , Jiang, Shaofei , Zeng, Yamian , Lai, Changqin . Three-Dimensional Reconstruction and Visualization of Underwater Bridge Piers Using Sonar Imaging . | SENSORS , 2024 , 24 (14) . |
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In order to explore the reinforcement effect and working mechanism of spliced wood columns strengthened by fiber reinforced polymer, the axial compression tests of 10 reinforced wood columns were carried out considering the influence of different fiber sheets and splicing methods. The failure modes and axial compressive properties of reinforced columns under three kinds of FRP sheets (AFRP, BFRP, CFRP) and four kinds of splicing methods (tenon joint, keban tenon joint, mortise joint, straight tenon joint) weree compared and analyzed. The results indicated that the traditional pier jointed columns without FRP reinforcement show the cracking of jointed timber and local buckling fracture after cracking. However, after FRP reinforcement, the integrity of the pier joint area is good, while the failure mainly occurred at the interface between the upper and lower piers, which was manifested as wood crushing and fiber cloth folding. The bearing capacity and stiffness of unconstrained pier joints were only recovered to 42%-69% and 43%-65% respectively. After the FRP reinforced pier was connected to the wooden column, the axial compression capacity can be restored to 75%-100% of the intact wooden column, the stiffness can be restored to 66%-107%, the ductility can be improved by 24%-96%, and the axial compression bearing capacity and deformation capacity of the wooden column can be effectively restored or improved. In addition, the stiffness degradation was not obvious. The load displacement curves and mechanical properties obtained by simulation were in good agreement with the experimental results. In conclusion, the spliced timber columns reinforced by FRP sheets had good mechanical properties, which can provide reference for the repair of traditional timber structures and the splicing of wooden columns. © 2024 Harbin Institute of Technology. All rights reserved.
Keyword :
Axial compression Axial compression Bearing capacity Bearing capacity Compression testing Compression testing Cracks Cracks Ductility Ductility Fiber reinforced plastics Fiber reinforced plastics Piers Piers Restoration Restoration Stiffness Stiffness Timber Timber
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GB/T 7714 | Xu, Jie , Jiang, Shaofei . Experimental study on axial compression characteristics of spliced wood columns strengthened with FRP sheets [J]. | Journal of Harbin Institute of Technology , 2024 , 56 (2) : 77-85 . |
MLA | Xu, Jie et al. "Experimental study on axial compression characteristics of spliced wood columns strengthened with FRP sheets" . | Journal of Harbin Institute of Technology 56 . 2 (2024) : 77-85 . |
APA | Xu, Jie , Jiang, Shaofei . Experimental study on axial compression characteristics of spliced wood columns strengthened with FRP sheets . | Journal of Harbin Institute of Technology , 2024 , 56 (2) , 77-85 . |
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