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< Page ,Total 35 >
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 CSCD PKU
期刊论文 | 2024 , 57 (05) , 1-14 | 土木工程学报
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Abstract :

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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Three-Dimensional Reconstruction and Visualization of Underwater Bridge Piers Using Sonar Imaging Scopus
期刊论文 | 2024 , 24 (14) | Sensors
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Abstract :

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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Three-Dimensional Reconstruction and Visualization of Underwater Bridge Piers Using Sonar Imaging EI
期刊论文 | 2024 , 24 (14) | Sensors
数字孪生在空间结构生命周期管理中的应用与挑战 PKU
期刊论文 | 2024 , 52 (03) , 369-378 | 福州大学学报(自然科学版)
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Abstract :

数字孪生是推动空间结构生命周期数字化、智能化管理的关键技术.为实现空间结构生命周期的智能管理,首先,分析数字孪生在“面向对象”和“面向过程”中的含义,给出基于数字孪生的空间结构生命周期管理新内涵;其次,分析空间结构在设计、建造和运维等结构生命周期管理各阶段的应用范式,以此建立数字孪生驱动的空间结构应用架构;最后,对数字孪生在空间结构生命周期管理应用中存在的挑战进行阐述和展望.研究表明,数字孪生是空间结构生命周期管理的技术保障,而高保真孪生体是实现数字孪生功能的重要前提.

Keyword :

数字孪生 数字孪生 生命周期管理 生命周期管理 空间结构 空间结构 面向对象 面向对象 面向过程 面向过程

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GB/T 7714 宋华霖 , 姜绍飞 . 数字孪生在空间结构生命周期管理中的应用与挑战 [J]. | 福州大学学报(自然科学版) , 2024 , 52 (03) : 369-378 .
MLA 宋华霖 et al. "数字孪生在空间结构生命周期管理中的应用与挑战" . | 福州大学学报(自然科学版) 52 . 03 (2024) : 369-378 .
APA 宋华霖 , 姜绍飞 . 数字孪生在空间结构生命周期管理中的应用与挑战 . | 福州大学学报(自然科学版) , 2024 , 52 (03) , 369-378 .
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数字孪生在空间结构生命周期管理中的应用与挑战 PKU
期刊论文 | 2024 , 52 (3) , 369-378 | 福州大学学报(自然科学版)
BFRP布加固巴掌榫墩接木柱轴压性能研究 CSCD PKU
期刊论文 | 2024 , (03) | 建筑结构学报
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Abstract :

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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BFRP布加固巴掌榫墩接木柱轴压性能研究 CSCD PKU
期刊论文 | 2024 , 45 (3) , 197-207 | 建筑结构学报
BFRP布加固巴掌榫墩接木柱轴压性能研究 CSCD PKU
期刊论文 | 2024 , 45 (03) , 197-207 | 建筑结构学报
基于声发射多参数耦合的木材裂缝检测方法 PKU
期刊论文 | 2024 , 54 (02) , 136-144 | 建筑结构
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Abstract :

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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基于声发射多参数耦合的木材裂缝检测方法 PKU
期刊论文 | 2024 , 54 (2) , 136-144 | 建筑结构
纤维布加固墩接木柱轴压试验 CSCD PKU
期刊论文 | 2024 , 56 (2) , 77-85 | 哈尔滨工业大学学报
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Abstract :

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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纤维布加固墩接木柱轴压试验 CSCD PKU
期刊论文 | 2024 , 56 (02) , 77-85 | 哈尔滨工业大学学报
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 CSCD PKU
期刊论文 | 2024 , 37 (02) , 88-99 | 中国公路学报
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Abstract :

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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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 CSCD PKU
期刊论文 | 2024 , 37 (2) , 88-99 | 中国公路学报
L形内置钢板混凝土组合剪力墙抗剪性能分析 CSCD PKU
期刊论文 | 2024 , 26 (01) , 54-64 | 建筑钢结构进展
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Abstract :

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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L形内置钢板混凝土组合剪力墙抗剪性能分析 CSCD PKU
期刊论文 | 2024 , 26 (1) , 54-64 | 建筑钢结构进展
Damage identification of non-dispersible underwater concrete columns under compression using impedance technique and stress-wave propagation SCIE
期刊论文 | 2024 | JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
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Abstract :

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 .
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 (2024) .
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 .
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Damage identification of non-dispersible underwater concrete columns under compression using impedance technique and stress-wave propagation EI
期刊论文 | 2024 , 14 (7) , 1651-1665 | Journal of Civil Structural Health Monitoring
Damage identification of non-dispersible underwater concrete columns under compression using impedance technique and stress-wave propagation Scopus
期刊论文 | 2024 , 14 (7) , 1651-1665 | Journal of Civil Structural Health Monitoring
Assessment of Soft-First-Floor Structures Reinforced by Rocking Frame Based on Seismic Resilience SCIE
期刊论文 | 2024 , 14 (1) | BUILDINGS
WoS CC Cited Count: 1
Abstract&Keyword Cite Version(2)

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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Assessment of Soft-First-Floor Structures Reinforced by Rocking Frame Based on Seismic Resilience EI
期刊论文 | 2024 , 14 (1) | Buildings
Assessment of Soft-First-Floor Structures Reinforced by Rocking Frame Based on Seismic Resilience Scopus
期刊论文 | 2024 , 14 (1) | Buildings
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