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学者姓名：姜绍飞
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Abstract ：
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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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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为研究BFRP布加固巴掌榫墩接木柱的轴压力学性能，对9组不同BFRP环箍层数和纵带层数的加固试件进行轴压试验。研究了试件的破坏特征、荷载-变形曲线，对比分析了加固前后的失效模式、应变状态、承载力、刚度、延性等。为准确地计算延性，提出了ESEP法确定木柱的名义屈服点。建立了数值仿真模型，在试验结果验证模型有效性的基础之上，对墩接高度(h_(d))、墩接长度(l_(d))进行了参数分析。最后，结合参数分析，推导建立了FRP加固巴掌榫墩接木柱轴压承载力计算公式。结果表明，BFRP环箍与纵带加固柱的墩接区整体性良好，承载力和刚度可恢复至完好木柱80%～90%，延性提升9%～90%，加固后构件具有良好的力学性能；ESEP法计算值合理可靠，能适用于木构件屈服点的确定；有限元分析表明，承载力随墩接高度的增加而减小，墩接长度对承载力影响较小；承载力公式计算值与试验值最大误差为12.1%，可为木结构建筑的修缮提供技术支撑。
Keyword ：
BFRP布 BFRP布 刚度 刚度 墩接加固 墩接加固 屈服点 屈服点 延性 延性 轴压承载力 轴压承载力
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| GB/T 7714 | 徐杰 , 姜绍飞 , 葛子毅 . BFRP布加固巴掌榫墩接木柱轴压性能研究 [J]. | 建筑结构学报 , 2024 , (03) . |
| MLA | 徐杰 et al. "BFRP布加固巴掌榫墩接木柱轴压性能研究" . | 建筑结构学报 03 (2024) . |
| APA | 徐杰 , 姜绍飞 , 葛子毅 . BFRP布加固巴掌榫墩接木柱轴压性能研究 . | 建筑结构学报 , 2024 , (03) . |
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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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为揭示L形内置钢板混凝土组合剪力墙的工作机理并提出其抗剪承载力计算公式，首先建立了非线性有限元模型，并通过试验结果进行了验证。在此基础上研究了高宽比、轴压比、钢板厚度、混凝土强度、翼缘长度等参数对剪力墙抗剪性能的影响。最后，提出了剪力墙的抗剪承载力计算公式。结果表明：剪力墙在受力过程中，腹板是主要受力构件；随着高宽比的减小，剪力墙的抗剪承载力和初始抗侧刚度增大；随着轴压比的增大，剪力墙的抗剪承载力增大，但当轴压比超过0.5时，抗剪承载力开始降低；将所提出的剪力墙抗剪承载力计算公式与现有的计算公式相比，计算结果误差较小，可以为工程应用提供参考。
Keyword ：
参数化分析 参数化分析 抗剪承载力 抗剪承载力 数值分析 数值分析 组合剪力墙 组合剪力墙
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| GB/T 7714 | 姜绍飞 , 韩育昌 , 刘越生 . L形内置钢板混凝土组合剪力墙抗剪性能分析 [J]. | 建筑钢结构进展 , 2024 , 26 (01) : 54-64 . |
| MLA | 姜绍飞 et al. "L形内置钢板混凝土组合剪力墙抗剪性能分析" . | 建筑钢结构进展 26 . 01 (2024) : 54-64 . |
| APA | 姜绍飞 , 韩育昌 , 刘越生 . L形内置钢板混凝土组合剪力墙抗剪性能分析 . | 建筑钢结构进展 , 2024 , 26 (01) , 54-64 . |
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为及时了解木材的损伤情况，需对木材进行损伤评价，而木材裂缝深度是评价木材损伤的重要指标之一，其量测方法是一大难点，亟待解决。基于声发射参数(峰值、频率重心、能量)在杉木裂缝中的衰减规律，应用加权平均法对声发射参数进行归一化处理，提出了基于声发射多参数耦合的裂缝深度检测方法。结果表明：声发射峰值、频率重心、能量在木材存在裂缝与无裂缝的交界面会发生突变，且所提的基于声发射多参数耦合的综合指标值在交界面大于设定阈值，能有效检测木材的裂缝深度。
Keyword ：
声发射 声发射 木材裂缝深度 木材裂缝深度 结构健康监测 结构健康监测 综合指标值差异系数 综合指标值差异系数 裂缝深度检测指标 裂缝深度检测指标
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| GB/T 7714 | 麻胜兰 , 陈志宁 , 邵顺安 et al. 基于声发射多参数耦合的木材裂缝检测方法 [J]. | 建筑结构 , 2024 , 54 (02) : 136-144 . |
| MLA | 麻胜兰 et al. "基于声发射多参数耦合的木材裂缝检测方法" . | 建筑结构 54 . 02 (2024) : 136-144 . |
| APA | 麻胜兰 , 陈志宁 , 邵顺安 , 姜绍飞 , 许跃飞 . 基于声发射多参数耦合的木材裂缝检测方法 . | 建筑结构 , 2024 , 54 (02) , 136-144 . |
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水下桩墩作为桥梁结构的重要组成部分，由于其所处复杂的水文环境，通常会在其表面产生各种表观病害。现有的光学检测方法存在2个方面的问题：(1)水下图像模糊不清，色彩严重失真；(2)无法定量化识别病害尺寸大小，且检测效率低。针对这些问题，提出了图像融合增强算法与深度学习模型相结合的水下桩墩表观病害轮廓提取方法。首先，提出了一种基于点锐度权重的图像像素级融合算法，不仅能够融合2种单一增强图像，而且在保证有效色彩校正的同时还能显著提高图像的对比度。其次，对DeepLabv3+语义分割网络模型进行轻量化改进，使其保证精度的情况下，尽可能降低模型所需的权重参数量；随后采用陆上建筑结构中的表观病害公开数据集训练主干特征提取网络层，并采用迁移学习方法将其运用到目标域的检测任务中。最后，利用水下试验与实际工程采集到的图像数据集对轻量化改进模型进行训练，建立起水下桩墩表观病害轮廓提取模型，然后对其进行验证与测试，并从3个方面进行了比较与讨论，即与其他5种常用算法的比较、图像融合前后的检测结果以及噪声影响，验证了所提出改进方法的鲁棒性和有效性。结果表明：提出的图像融合增强算法可以有效地增强病害图像轮廓的细节特征，且所提的轻量化改进模型不仅具有最高的识别精度，还能够保持较高的检测效率与鲁棒性，适合植入小型水下机器人中用于实际桥梁结构的水下桩墩表观病害轮廓的实时化、定量化检测。
Keyword ：
桥梁工程 桥梁工程 桥梁结构水下桩墩 桥梁结构水下桩墩 水下结构检测 水下结构检测 表观病害 表观病害 轻量化网络 轻量化网络 迁移学习 迁移学习
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| GB/T 7714 | 王威 , 姜绍飞 , 宋华霖 et al. 基于轻量化网络与迁移学习的桥梁水下桩墩结构表观病害轮廓提取 [J]. | 中国公路学报 , 2024 , 37 (02) : 88-99 . |
| MLA | 王威 et al. "基于轻量化网络与迁移学习的桥梁水下桩墩结构表观病害轮廓提取" . | 中国公路学报 37 . 02 (2024) : 88-99 . |
| APA | 王威 , 姜绍飞 , 宋华霖 , 李朋泽 , 王圣贤 , 苏振恒 . 基于轻量化网络与迁移学习的桥梁水下桩墩结构表观病害轮廓提取 . | 中国公路学报 , 2024 , 37 (02) , 88-99 . |
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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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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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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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