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学者姓名：姜绍飞
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Abstract ：
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 excessive enhancement of rotational stiffness leads to an uneven distribution of rotational stiffness across the entire timber frame. This uneven distribution concentrates the load effect on the strengthened mortise–tenon joints (MJs), causing localized failure in advance. To address this issue, a reversible and non-destructive strengthening method for the damaged MJs is devised, involving the utilization of an assembled spring-steel hoop. The rotational stiffness of a strengthened MJ is derived from the springs that link the steel hoop of the beam and column, resembling the rotational stiffness of an intact MJ. A comparison of the measured moment-rotation curves of various types of MJ reveals that the rotational stiffness similarity necessitates the strengthened MJ's yield moment and ultimate moment, along with the associated rotation angles, to closely resemble those of the intact MJ. Secondly, a design methodology is developed for the assembled spring-steel hoop, which involves determining the parameters of the connecting spring. The comparative analysis of the hysteretic test results on multiple strengthened and intact MJs indicates that the strengthened MJs exhibit rotational stiffness deviations of less than 12.2 % during the elasticity stage and 6.6 % during the plasticity stage, in comparison to the intact MJs. A spring exhibits a lower ultimate extension compared to timber, leading to a maximum discrepancy of 37.5 % in the ductility coefficients between the strengthened MJs and intact MJs. The strengthened and intact MJs display similar patterns of stiffness reduction and energy dissipation progression. © Elsevier Ltd
Keyword ：
Design Design Energy dissipation Energy dissipation Nondestructive examination Nondestructive examination Stiffness Stiffness Strengthening (metal) Strengthening (metal) Timber Timber
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| GB/T 7714 | Shen, Sheng , Sun, Yu , Wang, Yao et al. Damaged mortise–tenon joint strengthened using an assembled spring–steel hoop based on a design of similar rotational stiffness [J]. | Journal of Building Engineering , 2024 , 95 . |
| MLA | Shen, Sheng et al. "Damaged mortise–tenon joint strengthened using an assembled spring–steel hoop based on a design of similar rotational stiffness" . | Journal of Building Engineering 95 (2024) . |
| APA | Shen, Sheng , Sun, Yu , Wang, Yao , Qi, Yajun , Jiang, Shaofei , Fu, Xufeng et al. Damaged mortise–tenon joint strengthened using an assembled spring–steel hoop based on a design of similar rotational stiffness . | Journal of Building Engineering , 2024 , 95 . |
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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. © 2024 by the authors.
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, J. , Jiang, S. , Zeng, Y. et al. Three-Dimensional Reconstruction and Visualization of Underwater Bridge Piers Using Sonar Imaging [J]. | Sensors , 2024 , 24 (14) . |
| MLA | Luo, J. et al. "Three-Dimensional Reconstruction and Visualization of Underwater Bridge Piers Using Sonar Imaging" . | Sensors 24 . 14 (2024) . |
| APA | Luo, J. , Jiang, S. , Zeng, Y. , Lai, C. . Three-Dimensional Reconstruction and Visualization of Underwater Bridge Piers Using Sonar Imaging . | Sensors , 2024 , 24 (14) . |
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To addresses the challenge of underwater grouting sleeve corrosion affecting bridge service life, we propose an innovative inspection approach by integrating a modified ultrasonic testing instrument, ultrasonic data augmentation method, and an improved ensemble learning prediction model. Firstly, the ultrasonic data was collected from grouting sleeve specimens by the modified instrument. Secondly, a data generation model, incorporating Bray Curtis distance and rejection sampling algorithm, was developed to generate samples and filter abnormal data. Then, Circle Chaotic Map improved Grey Wolf Optimizer was proposed to optimize parameters from the Random Forest (RF) algorithm for establishing the prediction model. Finally, SHapley Additive exPlanations (SHAP) method was used to interpret the model globally and locally. Experimental results validate the effectiveness of the data augmentation method, ensuring high-quality ultrasonic data for accurate corrosion rate predictions. The proposed inspection method provide technical support for assessing remaining bridge bearing capacity and service life, showcasing high accuracy, interpretability, and noise tolerance. © 2024 Elsevier Ltd
Keyword ：
Concrete construction Concrete construction Corrosion rate Corrosion rate Forecasting Forecasting Grouting Grouting Inspection Inspection Learning algorithms Learning algorithms Learning systems Learning systems Mortar Mortar
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| GB/T 7714 | Wang, Wei , Jiang, Shaofei , Song, Hualin et al. Inspection method of the corrosion rate for underwater grouting sleeves by integrating ultrasonic data augmentation and interpretable ensemble learning [J]. | Measurement: Journal of the International Measurement Confederation , 2024 , 237 . |
| MLA | Wang, Wei et al. "Inspection method of the corrosion rate for underwater grouting sleeves by integrating ultrasonic data augmentation and interpretable ensemble learning" . | Measurement: Journal of the International Measurement Confederation 237 (2024) . |
| APA | Wang, Wei , Jiang, Shaofei , Song, Hualin , Wu, Hongyu , Wang, Shengxian . Inspection method of the corrosion rate for underwater grouting sleeves by integrating ultrasonic data augmentation and interpretable ensemble learning . | Measurement: Journal of the International Measurement Confederation , 2024 , 237 . |
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Current scouring effects and additives increase the risk of failure in underwater structures, and poor observation complicates the identification and assessment of damage. We present a novel index for assessing non-dispersible underwater concrete columns using stress-wave and impedance. A piezoelectric lead zirconate titanate sensor was used to monitor the compression process of non-dispersible underwater concrete columns and ascertain the extent of damage. The proposed index divides the damage process into initial compaction, elastic deformation, and crack development and failure stages. Additionally, the proposed method quantifies and identifies damage, producing results that agree with those for the axial compression failure characteristics.
Keyword ：
Damage assessment Damage assessment Impedance Impedance Non-dispersible underwater concrete column Non-dispersible underwater concrete column Stress-wave Stress-wave
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| GB/T 7714 | Ma, Shenglan , Ren, Shurong , Wu, Chen et al. Damage identification of non-dispersible underwater concrete columns under compression using impedance technique and stress-wave propagation [J]. | JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING , 2024 , 14 (7) : 1651-1665 . |
| MLA | Ma, Shenglan et al. "Damage identification of non-dispersible underwater concrete columns under compression using impedance technique and stress-wave propagation" . | JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING 14 . 7 (2024) : 1651-1665 . |
| APA | Ma, Shenglan , Ren, Shurong , Wu, Chen , Jiang, Shaofei , Huang, Weijie . Damage identification of non-dispersible underwater concrete columns under compression using impedance technique and stress-wave propagation . | JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING , 2024 , 14 (7) , 1651-1665 . |
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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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In order to study the axial compression performance of palm-tenon spliced timber columns reinforced with BFRP sheets (referred to as the reinforced timber column), the axial compression test was carried out on 10 specimens, including seven splicing columns with different number of BFRP transverse and longitudinal fiber layers, one ke-ban splicing column and two intact timber columns. The failure characteristics and load-displacement curves of the columns were analyzed, and a comparison was made between the before- and after-reinforcement columns for the failure mode, strain state, bearing capacity, stiffness and ductility. In order to accurately calculate the displacement ductility coefficient of timber components, the ESEP method was proposed to determine the nominal yield point of timber column. The results show that the integrity of the splicing area is good for the specimens with composite reinforcement of BFRP, and the ultimate bearing capacity and stiffness of reinforced timber columns can be restored to 80% -90% level of intact timber columns, as well as ductility can be increased by 9% -90% . This indicates that the reinforced timber columns have good mechanical performance. The nominal yield displacement determined by ESEP method is reasonable and reliable, which can be used to determine the yield point of timber components. Furthermore, a numerical simulation model was established, and the validity of the model was verified by the experimental results. Based on the model, the effect of splice height (hd) and splice length (ld) on the reinforced timber column were analyzed. A calculation formula was derived for the axial compression capacity of the reinforced timber column. The finite element analysis shows that the bearing capacity decreases with the increase of hd, and ld has little effect on the bearing capacity. The maximum error between the calculated value and the test value is 12. 1% . The formula proposed in this paper can provide reference for the retrofitting of timber structures. © 2024 Science Press. All rights reserved.
Keyword ：
Axial compression Axial compression Bearing capacity Bearing capacity Compression testing Compression testing Ductility Ductility Finite element method Finite element method Reinforcement Reinforcement Stiffness Stiffness Timber Timber
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| GB/T 7714 | Xu, Jie , Jiang, Shaofei , Ge, Ziyi et al. Study on axial compression performance of palm-tenon spliced timber columns reinforced with BFRP sheets [J]. | Journal of Building Structures , 2024 , 45 (3) : 197-207 . |
| MLA | Xu, Jie et al. "Study on axial compression performance of palm-tenon spliced timber columns reinforced with BFRP sheets" . | Journal of Building Structures 45 . 3 (2024) : 197-207 . |
| APA | Xu, Jie , Jiang, Shaofei , Ge, Ziyi , Lin, En , Lin, Jianwen , Fu, Chong . Study on axial compression performance of palm-tenon spliced timber columns reinforced with BFRP sheets . | Journal of Building Structures , 2024 , 45 (3) , 197-207 . |
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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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素土强度低、耐久性差且各改性材料掺量往往由工匠凭经验大致确定，导致夯土表面时常容易开裂剥落，故应根据现场土质状况以及合理试验方法来设计夯土改性配比。现有研究大都局限于单一性能指标最优的配比，而现实中夯土既要考虑针对多项力学性能指标与耐久性能指标的同步优化，还要考虑不同地域与气候条件下各指标的重要性不同。另外，现有研究仅能确定若干预设配比中的最优组，而非改性材料预设掺量范围内的最优配比。为此，文章提出一种基于力学性能指标与耐久性能指标联合的夯土改性配比优化设计方法，其包括：(1)土料选用原则与土质鉴定方法；(2)考虑夯土多性能指标的综合赋权方法；(3)基于加权评分和回归分析的夯土改性配比综合比选与优化方法。文章方法通过调整指标权重筛选出适应指标重要性不同时的夯土改性配比，并通过优化设计获得各改性材料预设掺量范围内的最优配比。最后通过设计实例证明了文章方法的确可得到最优的夯土改性配比。
Keyword ：
优化设计 优化设计 多性能指标 多性能指标 夯土 夯土 权重系数 权重系数 配比 配比
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| GB/T 7714 | 沈圣 , 孙宇 , 王耀 et al. 基于力学性能指标与耐久性能指标联合的夯土改性配比优化设计方法 [J]. | 土木工程学报 , 2024 , 57 (05) : 1-14 . |
| MLA | 沈圣 et al. "基于力学性能指标与耐久性能指标联合的夯土改性配比优化设计方法" . | 土木工程学报 57 . 05 (2024) : 1-14 . |
| APA | 沈圣 , 孙宇 , 王耀 , 姜绍飞 , 张鹰 , 付绪峰 et al. 基于力学性能指标与耐久性能指标联合的夯土改性配比优化设计方法 . | 土木工程学报 , 2024 , 57 (05) , 1-14 . |
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为研究玄武岩纤维增强聚合物(basalt fiber reinforced polymer, BFRP)模壳不排水加固钢筋混凝土(reinforced concrete, RC)墩柱抗震恢复力模型，在拟静力试验基础上，采用OpenSees有限元软件对模壳加固墩柱进行数值分析，主要研究参数为填充层混凝土强度、模壳厚度、加固高度、轴压比。研究表明：填充层混凝土强度等级越高，墩柱抗震性能有所增强，但C40以上的填充层混凝土强度等级墩柱的抗震性能较为接近；模壳加固厚度较大墩柱的抗震性能优于厚度较小墩柱；当模壳加固高度较高时，墩柱的抗震性能较好，当加固高度大于2～3倍原墩柱塑性铰高度时，抗震性能提升效果趋于稳定；轴压比越大，墩柱的刚度退化较快，不利延性发展。后通过数据回归分析，建立了BFRP模壳加固RC墩柱恢复力模型，对比可知，恢复力模型与试验曲线拟合较好，能有效反映加固墩柱的滞回性能，可为此类结构的抗震性能分析提供参考。
Keyword ：
不排水加固 不排水加固 参数分析 参数分析 恢复力模型 恢复力模型 有限元 有限元 玄武岩纤维增强聚合物(BFRP)模壳 玄武岩纤维增强聚合物(BFRP)模壳 钢筋混凝土(RC)墩柱 钢筋混凝土(RC)墩柱
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| GB/T 7714 | 张景杭 , 夏樟华 , 姜绍飞 et al. BFRP模壳不排水加固RC墩柱恢复力模型 [J]. | 振动与冲击 , 2024 , 43 (16) : 192-203 . |
| MLA | 张景杭 et al. "BFRP模壳不排水加固RC墩柱恢复力模型" . | 振动与冲击 43 . 16 (2024) : 192-203 . |
| APA | 张景杭 , 夏樟华 , 姜绍飞 , 洪俊贤 , 朱朴 , 范千 . BFRP模壳不排水加固RC墩柱恢复力模型 . | 振动与冲击 , 2024 , 43 (16) , 192-203 . |
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