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Abstract ：
索结构中,拉索响应与损伤之间处于高度非线性状态,常规数学模型对拉索损伤识别普遍存在精度欠佳问题.针对该问题创建了七丝钢绞线的拉索有限元模型,提出基于组合指标的CNN&LSTM神经网络损伤识别方法.借助该拉索有限元模型模拟 4 类损伤工况,分类提取响应.对比分析总能量变化率、频率、能量比偏差与能量比方差等不同指标对损伤程度的表征,建立能量与频率相结合的组合损伤指标.对比分析联合CNN&LSTM神经网络面对各损伤指标,以及传统中单独的卷积神经网络(CNN)与长短记忆法(LSTM)针对组合损伤指标的识别结果.研究发现,基于组合指标的联合CNN&LSTM深度学习网络的拉索损伤识别准确率最高,达到 96.67%,高于CNN的86.63%及LSTM的82.15%,表明CNN&LSTM在斜拉索损伤识别应用中具有较大潜力.
Keyword ：
卷积神经网络 卷积神经网络 拉索有限元 拉索有限元 损伤识别 损伤识别 组合指标 组合指标 长短记忆法 长短记忆法
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| GB/T 7714 | 朱三凡 , 刘世凤 , 余印根 et al. 联合CNN与LSTM神经网络的斜拉索损伤识别方法 [J]. | 福建理工大学学报 , 2024 , 22 (4) : 326-332 . |
| MLA | 朱三凡 et al. "联合CNN与LSTM神经网络的斜拉索损伤识别方法" . | 福建理工大学学报 22 . 4 (2024) : 326-332 . |
| APA | 朱三凡 , 刘世凤 , 余印根 , 王志俸 , 夏樟华 . 联合CNN与LSTM神经网络的斜拉索损伤识别方法 . | 福建理工大学学报 , 2024 , 22 (4) , 326-332 . |
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为研究内置薄钢板的纤维复合材料接头的连接性能,对该连接接头结构展开单轴拉伸试验.采用ABAQUS重点对影响连接性能的端径比(E/D)、边径比(Sw/D)、列径比(S/D)和孔径厚度比(D/t)等几何连接参数进行研究.研究结果表明:内置薄钢板的纤维复合材料连接接头相较于无内置钢板的纤维复合材料连接接头,具有更大的刚度,峰值荷载和峰值位移分别提升约50％和58％,孔周应力集中现象有所降低,改善了破坏模式,表现出较好的承载能力与延性性能;几何连接参数对连接接头的承载能力和失效模式有较大的影响,为提高连接效率,建议选用参数Sw/D≥2、E/D≥4、4≤S/D≤5、1.6≤D/t≤2.
Keyword ：
内置薄钢板 内置薄钢板 力学性能 力学性能 有限元分析 有限元分析 纤维复合材料 纤维复合材料 连接接头 连接接头
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| GB/T 7714 | 张景杭 , 姜绍飞 , 夏樟华 et al. 内置薄钢板的纤维复合材料接头连接性能 [J]. | 福州大学学报（自然科学版） , 2024 , 52 (5) : 587-594 . |
| MLA | 张景杭 et al. "内置薄钢板的纤维复合材料接头连接性能" . | 福州大学学报（自然科学版） 52 . 5 (2024) : 587-594 . |
| APA | 张景杭 , 姜绍飞 , 夏樟华 , 林永福 , 洪俊贤 . 内置薄钢板的纤维复合材料接头连接性能 . | 福州大学学报（自然科学版） , 2024 , 52 (5) , 587-594 . |
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基于相关工程案例,对装配式桥墩的结构体系进行介绍;从结构受力性能、耐久性、施工便利性等角度,对不同类型装配式桥墩的优缺点进行分析比较.通过分析既有研究成果发现:既有研究大多集中于桥墩的抗震性能,涉及装配式RC桥墩的抗压、抗剪性能等研究较为少见,《公路装配式混凝土桥梁设计规范》(JTG/T 3365-05-2022)虽提出了装配式混凝土桥墩的结构计算方法,但尚未根据不同类型装配式桥墩的拼接构造特征提出相应的局部构造的极限承载力验算方法;《公路装配式混凝土桥梁设计规范》(JTG/T 3365-05-2022)、《公路装配式混凝土桥梁施工技术规范》(JTG/T 3654-2022)规定了部分类型装配式桥墩的构造要求、施工工艺,一些地方标准已涉及装配式桥墩的抗震设计、施工、验收等,可用于指导部分类型的装配式桥墩的设计与施工,但内容不全面.在此基础上提出装配式桥墩在结构设计、施工、质量管控等方面存在的不足以及今后的发展方向.
Keyword ：
工程应用 工程应用 桥梁工程 桥梁工程 研究进展 研究进展 装配式RC桥墩 装配式RC桥墩 连接方式 连接方式
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| GB/T 7714 | 林上顺 , 张建帅 , 夏樟华 et al. 装配式RC桥墩研究现状及展望 [J]. | 土木与环境工程学报（中英文） , 2024 , 46 (6) : 135-147 . |
| MLA | 林上顺 et al. "装配式RC桥墩研究现状及展望" . | 土木与环境工程学报（中英文） 46 . 6 (2024) : 135-147 . |
| APA | 林上顺 , 张建帅 , 夏樟华 , 叶世集 , 赵锦冰 . 装配式RC桥墩研究现状及展望 . | 土木与环境工程学报（中英文） , 2024 , 46 (6) , 135-147 . |
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To reveal the damage mechanism and limit state of UHPC strengthened piers under eccentric compression with secondary stress considered, the UHPC strengthened RC piers were designed and fabricated, and the corresponding experimental study and theoretical analysis were conducted and compared with un-strengthened RC piers. The small eccentric load tests of UHPC strengthened RC piers with section enlargement method considering secondary stress were carried out, and the failure mode and ultimate load capacity of the strengthened piers with different initial stress were studied. Finite element models of strengthened columns were established, and the influence of UHPC strength, UHPC thickness and longitudinal reinforcement ratio on the ultimate load capacity was discussed by employing the finite element model. Based on the mechanical characteristics and equilibrium relations in limit state, the formula for calculating the ultimate load capacity of RC piers strengthened with UHPC was derived. The test results show that the load capacity of UHPC strengthened RC piers with reinforcement mesh is 183% larger than that of the un-strengthened pier under small eccentric load. The ultimate load capacity of the strengthened piers increases with the UHPC strength. The UHPC thickness has an obvious effect on the load capacity of the strengthened specimens, while the longitudinal reinforcement ratio has small effect on the load capacity. The increase of initial load will reduce the concrete utilization of the original piers, as well as the load capacity of the strengthened piers. The calculated load capacity of the proposed formula considering the secondary force has an error of less than 3% compared with the measured value, and less than 8% compared with the finite element calculation value, showing a relatively high calculation accuracy. The research results can provide a theoretical basis for the calculation of load capacity of RC piers strengthened with UHPC under eccentric compression. © 2024 Tsinghua University. All rights reserved.
Keyword ：
eccentric compression eccentric compression pier pier secondary load secondary load strengthened with UHPC strengthened with UHPC ultimate load capacity ultimate load capacity
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| GB/T 7714 | Xia, Z.-H. , Wang, M.-L. , Lin, S.-S. et al. ULTIMATE LOAD CAPACITY OF UHPC STRENGTHENED RC PIER UNDER ECCENTRIC COMPRESSION CONSIDERING SECONDARY LOAD; [考虑二次受力的 UHPC 加固 RC 墩偏压极限承载力] [J]. | Engineering Mechanics , 2024 , 41 (7) : 212-225 . |
| MLA | Xia, Z.-H. et al. "ULTIMATE LOAD CAPACITY OF UHPC STRENGTHENED RC PIER UNDER ECCENTRIC COMPRESSION CONSIDERING SECONDARY LOAD; [考虑二次受力的 UHPC 加固 RC 墩偏压极限承载力]" . | Engineering Mechanics 41 . 7 (2024) : 212-225 . |
| APA | Xia, Z.-H. , Wang, M.-L. , Lin, S.-S. , Lin, L.-M. , Li, Y.-L. . ULTIMATE LOAD CAPACITY OF UHPC STRENGTHENED RC PIER UNDER ECCENTRIC COMPRESSION CONSIDERING SECONDARY LOAD; [考虑二次受力的 UHPC 加固 RC 墩偏压极限承载力] . | Engineering Mechanics , 2024 , 41 (7) , 212-225 . |
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Abstract ：
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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已有研究表明，榫卯-灌浆套筒混合连接装配式方墩（简称混合连接拼装桥墩）的抗震性能接近于整体现浇桥墩。为进一步探讨混合连接拼装桥墩的轴压性能，以钢管的长度、直径以及壁厚等为变化参数，进行1个整体现浇桥墩（编号ZT）和4个混合连接拼装桥墩（编号GTA-0～GTD-0）的轴压承载力试验，结果表明，GTA-0～GTD-0试件的承载力比ZT试件提高了10.1%～14.4%，其延性系数均大于ZT试件；GTA-0～GTD-0试件的轴压承载力随钢管直径和长度的增大而增大，而钢管壁厚对于试件承载力的影响较小；拼装桥墩的破坏位置随着钢管长度的增加而上移，逐渐接近于整体现浇桥墩，但二者的破坏模式基本相同。
Keyword ：
承载力 承载力 桥墩 桥墩 混合接头 混合接头 装配式 装配式 轴压试验 轴压试验
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| GB/T 7714 | 林上顺 , 何乐 , 夏樟华 et al. 榫卯-灌浆套筒混合连接装配式方墩轴压性能研究 [J]. | 重庆大学学报 , 2024 , 47 (06) : 58-67 . |
| MLA | 林上顺 et al. "榫卯-灌浆套筒混合连接装配式方墩轴压性能研究" . | 重庆大学学报 47 . 06 (2024) : 58-67 . |
| APA | 林上顺 , 何乐 , 夏樟华 , 秦志清 , 张乐彤 , 陈治雄 . 榫卯-灌浆套筒混合连接装配式方墩轴压性能研究 . | 重庆大学学报 , 2024 , 47 (06) , 58-67 . |
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This analysis is based on relevant engineering cases in domestic and international contexts, the structural system of assembled bridge piers is introduced. The advantages and disadvantages of different types of assembled piers are analyzed and compared from the perspectives of structural stress performance, durability and construction convenience. Through analysis of the existing research results found that: most of the existing research focused on the seismic performance of the piers, but the research involving the compressive and shear performance of assembled RC piers is still relatively rare, Pacifications for Design of Highway Precast Concrete Bridges (JTG/T 3365-05—2022) although the structural calculation method of assembled concrete piers, but not yet according to the different types of assembled piers of the splicing structure characteristics, the corresponding limit of the local structure bearing capacity calculation method; Pacifications for Design of Highway Precast Concrete Bridges (JTG/T 3365-05—2022), Specifications for Construction of High Wary Precast Concrete Bridges (JTG/T 3654—2022) for some types of assembled piers construction requirements, construction techniques, some local standards have involved assembled piers seismic design, construction, acceptance, etc. These standards can be used to guide the design and construction of some types of assembled piers, but its content is still not comprehensive. On this basis, the shortcomings of assembled piers in structural design, construction, quality control and other aspects as well as the future development direction are proposed. © 2024 Chongqing University. All rights reserved.
Keyword ：
assembled RC piers assembled RC piers bridge engineering bridge engineering connection method connection method engineering application engineering application research progress research progress
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| GB/T 7714 | Lin, S. , Zhang, J. , Xia, Z. et al. Research status and prospect of assembled RC piers; [装配式 RC 桥墩研究现状及展望] [J]. | Journal of Civil and Environmental Engineering , 2024 , 46 (6) : 135-147 . |
| MLA | Lin, S. et al. "Research status and prospect of assembled RC piers; [装配式 RC 桥墩研究现状及展望]" . | Journal of Civil and Environmental Engineering 46 . 6 (2024) : 135-147 . |
| APA | Lin, S. , Zhang, J. , Xia, Z. , Ye, S. , Zhao, J. . Research status and prospect of assembled RC piers; [装配式 RC 桥墩研究现状及展望] . | Journal of Civil and Environmental Engineering , 2024 , 46 (6) , 135-147 . |
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JGJ 138 2016, CH 3-78, YB 9082 2006, AISC 360-16, and YE Lie-ping's formulas were used to calculate the ultimate flexural capacities of 51 collected specimens of steel reinforced concrete (SRC) beams with rectangular sections. The calculated results were compared with the test values. The ranges of parameters of the collected specimens and the reasons for the calculation errors of the existing calculation methods were analyzed. The limitations of the existing calculation methods were discussed in terms of the calculation theory and other aspects. Theoretical derivations were performed, and a method for calculating the ultimate flexural capacities of SRC beams with rectangular sections was proposed, and the ultimate flexural capacities of the collected specimens were calculated by using the proposed method. Analysis results show that some deviations arc found between the calculated values obtained by the existing calculation methods and the test values. The height value of the compression zone in CH 3-78 is not appropriate, and the calculation error of this method increases with the increase in concrete strength. The impact of the relative relationship between the neutral axis and the position of the structural steel on the calculation results is not considered in JGJ 138—2016, and limitations exist. YB 9082—2006 and AISC 360-16 do not take into account the interaction between structural steel and concrete or the arrangement of the structural steel. The YE Lie-ping's formulas produce conservative results. The average ratio of the values calculated by the proposed method for the ultimate flexural capacity to the test values of specimens is 0. 953, with a variance of 0. 015. The calculated values agree well with the test values. The steel ratios of the collected SRC beam specimens range from 1. 77% to 5. 77%, which is smaller than the reasonable steel ratio range suggested by YB 9082—2006. Therefore, it is necessary to carry out further supplementary tests of specimens with high steel ratios in the future, so as to improve the calculation method for the ultimate flexural capacity of SRC beams with rectangular sections. 1 tab, 10 figs, 31 refs. © 2024 Chang'an University. All rights reserved.
Keyword ：
Bridges Bridges Concrete beams and girders Concrete beams and girders Reinforced concrete Reinforced concrete Steel beams and girders Steel beams and girders Steel construction Steel construction Steel research Steel research
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| GB/T 7714 | Lin, Shang-Shun , Ji, Bang-Chong , Xia, Zhang-Hua et al. Ultimate flexural capacity of steel reinforced concrete beams with rectangular section [J]. | Journal of Traffic and Transportation Engineering , 2024 , 24 (1) : 146-157 . |
| MLA | Lin, Shang-Shun et al. "Ultimate flexural capacity of steel reinforced concrete beams with rectangular section" . | Journal of Traffic and Transportation Engineering 24 . 1 (2024) : 146-157 . |
| APA | Lin, Shang-Shun , Ji, Bang-Chong , Xia, Zhang-Hua , Liu, Jun-Ping , Lin, Jian-Fan , Zhao, Jin-Bing . Ultimate flexural capacity of steel reinforced concrete beams with rectangular section . | Journal of Traffic and Transportation Engineering , 2024 , 24 (1) , 146-157 . |
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As the main force component of cable suspending structure, the cable would have the problems of aging and damage in the bridge operation stage. How to quickly identify the damage of the cable is of great significance to ensure the healthy and stable development of the traffic in China. According to different physical quantities, the damage identification methods such as dynamic based damage identification method, static based damage identification method, dynamic and static combined damage identification method were introduced, and the application of intelligent algorithms of neural network and genetic algorithm in cable damage identification were also discussed. Based on analysis on the damage identification methods for the cables, the problems existing in the damage identification of the cable were concluded. According to features of the actual bridge structural forms, such as external prestressed concrete bridges, long-span cable-stayed bridges, suspension bridges and concrete-filled steel tube arch bridges, etc., the corresponding adaptive identification method should be proposed, which will be more targeted and practical. With the development of big data technology, the combination of traditional indicators and intelligent algorithms will be the research development directions for cable damage identification. © Tongji University Press 2024.
Keyword ：
Arch bridges Arch bridges Cables Cables Cable stayed bridges Cable stayed bridges Damage detection Damage detection Genetic algorithms Genetic algorithms Prestressed concrete Prestressed concrete Tubular steel structures Tubular steel structures
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| GB/T 7714 | Xia, Zhanghua , Yu, Yingen , Xie, Jun et al. Recent Advances in Research on Damage Identification Method for Cables in Bridges [C] . 2024 : 161-175 . |
| MLA | Xia, Zhanghua et al. "Recent Advances in Research on Damage Identification Method for Cables in Bridges" . (2024) : 161-175 . |
| APA | Xia, Zhanghua , Yu, Yingen , Xie, Jun , Lai, Shiyong , Lin, Youqin , Wang, Zhifeng . Recent Advances in Research on Damage Identification Method for Cables in Bridges . (2024) : 161-175 . |
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采用JGJ 138—2016、СИ3-78、YB 9082—2006、AISC 360-16、叶列平公式，计算了所收集的51个矩形截面型钢混凝土(SRC)梁试件的抗弯极限承载力，并将计算结果与试验值进行比较；分析了所收集试件的参数范围及现有计算方法出现计算误差的原因，讨论了现有计算方法在计算理论等方面存在的局限性，并进行理论推导，提出了矩形截面SRC梁抗弯极限承载力计算方法；采用所提出的计算方法，计算了所收集试件的抗弯极限承载力。分析结果表明：现有计算方法的计算值与试验值均存在一些偏差；СИ3-78中的受压区高度取值不合理，且该方法的计算误差随混凝土强度提高而增大；JGJ 138—2016未考虑中性轴与型钢位置的相对关系对计算结果的影响，存在局限性；YB 9082—2006与AISC 360-16未考虑型钢与混凝土相互作用及型钢的布置方式等问题；叶列平公式计算结果较为保守；采用提出的抗弯极限承载力计算方法得到的计算值与试件试验值的比值均值为0.953,方差为0.015,计算值与试验值吻合较好；所收集SRC梁试件的含钢率为1.77%～5.77%,小于YB 9082—2006所建议的合理含钢率范围，因此，今后还需进一步开展高含钢率试件的补充试验，以便完善矩形截面SRC梁的抗弯极限承载力计算方法。
Keyword ：
含钢率 含钢率 型钢混凝土梁 型钢混凝土梁 抗弯极限承载力 抗弯极限承载力 桥梁工程 桥梁工程 规范 规范 计算精度 计算精度
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| GB/T 7714 | 林上顺 , 暨邦冲 , 夏樟华 et al. 矩形截面型钢混凝土梁抗弯极限承载力 [J]. | 交通运输工程学报 , 2024 , 24 (01) : 146-157 . |
| MLA | 林上顺 et al. "矩形截面型钢混凝土梁抗弯极限承载力" . | 交通运输工程学报 24 . 01 (2024) : 146-157 . |
| APA | 林上顺 , 暨邦冲 , 夏樟华 , 刘君平 , 林建凡 , 赵锦冰 . 矩形截面型钢混凝土梁抗弯极限承载力 . | 交通运输工程学报 , 2024 , 24 (01) , 146-157 . |
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