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学者姓名：白玉磊
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摘要 ：
本发明公开了一种结构健康监测数据压缩与重构方法，包括以下步骤：输入原始监测信号x，稀疏度K的取值范围[lb, ub]；指定改进灰狼优化算法的种群个数N，最大迭代次数tmax，并构造自适应度函数f(k)；计算最优的稀疏度Kbest以及对应的自适应度f(Kbest)；得到稀疏度为Kbest时的重构信号输出Kbest，f(Kbest)以及本发明可以利用改进灰狼优化算法得到最优的稀疏度，将其输入正交匹配追踪算法后便可得到最优的重构信号，显著了提高了重构信号的精度。
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| GB/T 7714 | 贾俊峰 , 张龙冠 , 陈曦泽 et al. 一种结构健康监测数据压缩与重构方法 : CN202310262169.3[P]. | 2023-03-17 . |
| MLA | 贾俊峰 et al. "一种结构健康监测数据压缩与重构方法" : CN202310262169.3. | 2023-03-17 . |
| APA | 贾俊峰 , 张龙冠 , 陈曦泽 , 白玉磊 , 顾冉星 . 一种结构健康监测数据压缩与重构方法 : CN202310262169.3. | 2023-03-17 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Fiber-reinforced polymer (FRP) confinement has been demonstrated to be efficient in enhancing the deformation and strength capacities of concrete, while Polyethylene terephthalate (PET) FRP-confined concrete easily exhibits a strain-softening stress-strain behavior, especially for PET FRP-confined concrete in square columns. In this study, novel PET FRP-confined FRP spiral reinforced concrete square columns (FCFRSCs) are proposed. Capitalizing the benefits of internal FRP spiral reinforcement, the strain-softening behavior of PET FRP-confined concrete is expected to be alleviated, leading to excellent mechanical performance of the proposed square columns. The axial compressive behavior of FCFRSCs, as well as square concrete-filled PET FRP tube columns (CFFTs) and FRP reinforced concrete columns (FRCs) as reference columns, were investigated via experimentation. The experimental results show that the strain softening behavior of confined concrete in FCFRSCs has been substantially enhanced with the internal FRP reinforcement, confirming the viability of the system. The strain softening behavior of FRP-confined concrete after the first peak is prevented and a hardening behavior is achieved for concrete in FCFRSCs, especially when the GFRP spiral pitch is 30 mm.
关键词 ：
Glass FRP (GFRP) Glass FRP (GFRP) Reinforced concrete columns Reinforced concrete columns Confinement Confinement FRP spiral FRP spiral Axial load-strain behavior Axial load-strain behavior Fiber-reinforced polymer (FRP) bars Fiber-reinforced polymer (FRP) bars
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| GB/T 7714 | Zhou, Jie-Kai , Lin, Wen-Kai , Guo, Shao-Xiong et al. Behavior of FRP-confined FRP spiral reinforced concrete square columns (FCFRCs) under axial compression [J]. | JOURNAL OF BUILDING ENGINEERING , 2022 , 45 . |
| MLA | Zhou, Jie-Kai et al. "Behavior of FRP-confined FRP spiral reinforced concrete square columns (FCFRCs) under axial compression" . | JOURNAL OF BUILDING ENGINEERING 45 (2022) . |
| APA | Zhou, Jie-Kai , Lin, Wen-Kai , Guo, Shao-Xiong , Zeng, Jun-Jie , Bai, Yu-Lei . Behavior of FRP-confined FRP spiral reinforced concrete square columns (FCFRCs) under axial compression . | JOURNAL OF BUILDING ENGINEERING , 2022 , 45 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种带有可更换剪切耗能装置的自复位双柱墩体系，属于桥梁工程技术领域，包括上部结构、用于支撑所述上部结构的下部结构和承台，所述下部结构包括对称设置的左支撑体系和右支撑体系，所述左支撑体系包括盖梁、固定支撑在所述盖梁底部桥墩，所述左支撑体系和右支撑体系的盖梁之间连接有剪切耗能装置，所述桥墩与所述承台之间摇摆连接，所述剪切耗能装置在左支撑体系和右支撑体系的盖梁之间发生相对位移时进行耗能。采用本发明桥梁体系，可以充分发挥耗能装置耗能效率，还能提高桥墩耗能能力以及提高桥墩复位力和抗倾覆能力。
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| GB/T 7714 | 贾俊峰 , 魏博 , 郦炎森 et al. 一种带有可更换剪切耗能装置的自复位双柱墩体系 : CN202210065605.3[P]. | 2022-01-20 . |
| MLA | 贾俊峰 et al. "一种带有可更换剪切耗能装置的自复位双柱墩体系" : CN202210065605.3. | 2022-01-20 . |
| APA | 贾俊峰 , 魏博 , 郦炎森 , 白玉磊 , 郭彬立 , 郭河 . 一种带有可更换剪切耗能装置的自复位双柱墩体系 : CN202210065605.3. | 2022-01-20 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种附加小位移滑动及限位装置的多跨自复位摇摆双柱式墩桥梁体系，属于摇摆桥梁体系技术领域，包括由上至下依次设置的主梁、墩柱以及承台，主梁、墩柱以及承台之间设置有预应力筋；墩柱与主梁之间设置有小位移滑动装置包括小位移滑动装置，小位移滑动装置用于供主梁形变时相对墩柱发生沿桥向的形变位移；墩柱与主梁之间还设置有限位装置，限位装置用于使主梁相对墩柱移动至形变位移的极限位置时限制桥梁的继续移动；本发明的目的在于允许主梁在温度作用与桥墩发生相对滑移；当地震作用导致主梁与墩柱间顺桥向相对滑移较大时会触发限位装置，使桥梁体系在摇摆过程中受力机理及抗震性能与普通多跨自复位摇摆双柱式墩桥梁体系相同。
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| GB/T 7714 | 贾俊峰 , 边嘉琛 , 顾冉星 et al. 一种附加小位移滑动及限位装置的多跨自复位摇摆双柱式墩桥梁体系 : CN202211311139.9[P]. | 2022-10-25 . |
| MLA | 贾俊峰 et al. "一种附加小位移滑动及限位装置的多跨自复位摇摆双柱式墩桥梁体系" : CN202211311139.9. | 2022-10-25 . |
| APA | 贾俊峰 , 边嘉琛 , 顾冉星 , 白玉磊 , 韩强 , 庞伟 et al. 一种附加小位移滑动及限位装置的多跨自复位摇摆双柱式墩桥梁体系 : CN202211311139.9. | 2022-10-25 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种基于超声导波和卷积神经网络的钢绞线应力识别方法，包括以下步骤：分别在钢绞线两端的中心丝截面安装超声导波激励传感器和接收传感器；张拉钢绞线，在不同的张拉预应力下向激励传感器激励调制正弦波信号，并记录接收传感器获得的超声导波信号；以不同预应力状态下的超声导波信号作为特征值，以其对应的预应力值作为标签值，构建一维卷积神经网络的数据集；将数据集的数据输入卷积神经网络进行训练和测试，并输出各预应力状态下超声导波信号的预应力预测值；以钢绞线预应力真实值和预测值之间的均方根误差和归一化均方根误差为指标对一维卷积神经网络的预测结果进行评价。本发明避免了繁琐的参数提取过程，且提高了预测精度。
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| GB/T 7714 | 贾俊峰 , 张龙冠 , 白石 et al. 一种基于超声导波和卷积神经网络的钢绞线应力识别方法 : CN202211405157.3[P]. | 2022-11-10 . |
| MLA | 贾俊峰 et al. "一种基于超声导波和卷积神经网络的钢绞线应力识别方法" : CN202211405157.3. | 2022-11-10 . |
| APA | 贾俊峰 , 张龙冠 , 白石 , 白玉磊 , 焦庆丰 , 姚少睿 et al. 一种基于超声导波和卷积神经网络的钢绞线应力识别方法 : CN202211405157.3. | 2022-11-10 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种预制节段桥梁接缝结构，包括：桥梁预制节段，所述桥梁预制节段一端设有梯形剪力凹键，另一端设有梯形剪力凸键；所述桥梁预制节段内侧安装有骨架，所述骨架上安装有条形钢板，所述条形钢板一端延伸至所述梯形剪力凸键内；一种预制节段桥梁接缝施工方法，包括以下步骤：确定尺寸，准备材料；制作钢筋骨架并安装条形钢板；支模浇筑混凝土形成所述桥梁预制节段；涂抹环氧树脂胶；拼装桥梁预制节段。通过桥梁预制节段和条形钢板共同作用提高预制节段桥梁接缝的抗剪性能，避免运输或施工过程中发生碰撞导致剪力键破坏，且通过卡接机构连接梯形剪力凸键和梯形剪力凹键，提高了安装效率；有效解决预制桥梁接缝抗剪能力不足的问题。
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| GB/T 7714 | 贾俊峰 , 张凯迪 , 孙亚刚 et al. 一种预制节段桥梁接缝结构及施工方法 : CN202210490135.5[P]. | 2022-05-07 . |
| MLA | 贾俊峰 et al. "一种预制节段桥梁接缝结构及施工方法" : CN202210490135.5. | 2022-05-07 . |
| APA | 贾俊峰 , 张凯迪 , 孙亚刚 , 白玉磊 , 李斌 , 杜修力 et al. 一种预制节段桥梁接缝结构及施工方法 : CN202210490135.5. | 2022-05-07 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种外包FRP对纵筋侧向支撑刚度的计算方法，根据柱截面纵筋的数量和截面的对称性进行等截面划分，确定曲线梁模型；采用分析导向应力应变模型，获得轴向应变、轴向应力、侧向应变和侧向应力及其增量形式；确定FRP约束混凝土在轴向的剪切模量以及FRP约束混凝土保护层在环向的弹性模量；将该组合截面梁等效为单一材料截面，并求出其截面特性；利用结构力学求解超静定结构的方法，求解在任一给定的荷载作用下，在该作用点发生的位移；求出等效刚度。本发明具有高准确性、可更新可修改等优点，且运用了成熟的结构力学求解超静定结构的计算方法，计算简单，准确性高，具有很强的研究应用价值。
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| GB/T 7714 | 白玉磊 , 孙鹏轩 , 贾俊峰 et al. 一种外包FRP对纵筋侧向支撑刚度的计算方法 : CN202110024647.8[P]. | 2021-01-08 . |
| MLA | 白玉磊 et al. "一种外包FRP对纵筋侧向支撑刚度的计算方法" : CN202110024647.8. | 2021-01-08 . |
| APA | 白玉磊 , 孙鹏轩 , 贾俊峰 , 张玉峰 , 杨洪龙 . 一种外包FRP对纵筋侧向支撑刚度的计算方法 : CN202110024647.8. | 2021-01-08 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
预应力连接预制节段桥墩已较为广泛地应用于美国低震区桥梁,但在我国的工程应用甚少。由于预制节段桥墩的震害资料缺乏,且其抗震机理不明确、设计方法不完善,在高震区应用较少。本文基于预应力连接预制节段桥墩缩尺模型的拟静力试验测试,采用有限元分析软件ABAQUS建立其精细化数值模型,进行了单、斜向往复荷载作用下墩柱拟静力试验数值仿真,将桥墩的损伤情况、滞回行为与试验结果进行了对比分析。结果表明,数值模型输入的相关参数和设置的相互作用关系可较好地再现试验结果,试验和模拟结果均表明斜向加载的构件较单向加载的构件损伤更为严重,构件更早屈服,残余位移较大,墩柱构件最大偏移率为4%时其残余偏移率已超过1%。常规设...
关键词 ：
单、斜向往复荷载 单、斜向往复荷载 抗震性能 抗震性能 有限元分析模型 有限元分析模型 节段拼装桥墩 节段拼装桥墩 预应力筋 预应力筋
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| GB/T 7714 | 张凯迪 , 贾俊峰 , 白玉磊 et al. 预应力连接预制节段桥墩拟静力试验数值仿真分析 [C] //第30届全国结构工程学术会议论文集（Ⅱ册） . 2021 . |
| MLA | 张凯迪 et al. "预应力连接预制节段桥墩拟静力试验数值仿真分析" 第30届全国结构工程学术会议论文集（Ⅱ册） . (2021) . |
| APA | 张凯迪 , 贾俊峰 , 白玉磊 , 郭扬 . 预应力连接预制节段桥墩拟静力试验数值仿真分析 第30届全国结构工程学术会议论文集（Ⅱ册） . (2021) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
This paper presents an experimental study on the dynamic compressive behaviors of concrete confined with unidirectional natural flax fiber reinforced polymers (FFRPs) under an axial impact load. A total of 80 specimens were prepared and tested using a 75 mm diameter split Hopkinson pressure bar (SHPB) at different strain rates varying from 50 to 200 s−1. The experimental results showed that the failure modes and dynamic compressive mechanical properties (i.e., dynamic compressive strength, critical compressive strain, and energy absorption capacity) of FFRP-confined concrete were sensitive to the strain rate. The unconfined concrete specimens were crushed into small pieces at relatively low strain rates, whereas the FFRP-confined concrete specimens failed with FRP rupture and partial damage to the core concrete at relatively high strain rates. This indicates that the confinement of FFRP jackets can alleviate concrete damage and improve impact resistance. Compared with unconfined concrete, the application of the FFRP jacket remarkably improves the compressive strength, critical strain, and toughness, which indicates outstanding impact resistance. Increasing the confinement stiffness of the FFRP contributed to increasing the compressive strength, critical strain, and toughness. Based on the experimental results, the confinement mechanism of external flax FRP jackets on concrete was discussed, and a new dynamic strength model was proposed to predict the dynamic compressive strength of FFRP-confined concrete within the investigated strain rate range. © 2020
关键词 ：
Compressive strength Compressive strength Concrete testing Concrete testing Dynamics Dynamics Fiber reinforced concrete Fiber reinforced concrete Fiber reinforced plastics Fiber reinforced plastics Flax Flax Linen Linen Mechanical testing Mechanical testing Natural polymers Natural polymers Strain rate Strain rate
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| GB/T 7714 | Bai, Yu-lei , Yan, Zhi-Wei , Jia, Jun-Feng et al. Dynamic compressive behavior of concrete confined with unidirectional natural flax FRP based on SHPB tests [J]. | Composite Structures , 2021 , 259 . |
| MLA | Bai, Yu-lei et al. "Dynamic compressive behavior of concrete confined with unidirectional natural flax FRP based on SHPB tests" . | Composite Structures 259 (2021) . |
| APA | Bai, Yu-lei , Yan, Zhi-Wei , Jia, Jun-Feng , Ozbakkaloglu, Togay , Liu, Yue . Dynamic compressive behavior of concrete confined with unidirectional natural flax FRP based on SHPB tests . | Composite Structures , 2021 , 259 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
In this study, carbon nanofibers (CNFs)/epoxy composites incorporating different contents of CNFs were fabricated and immersed in distilled water for 180 days. Water absorption test, tensile tests, scanning electron microscopy (SEM) observation, dynamic mechanical analysis (DMA), and Fourier transform infrared (FTIR) spectroscopy were performed to evaluate the effect of CNFs content on hygrothermal aging behavior of CNFs/epoxy composites, and to reveal the hygrothermal aging mechanism of such composites. Test results showed that the addition of CNFs into pure epoxy resin could obviously improve its hygrothermal aging behavior. The CNFs/epoxy composites had better resistance to water absorption than pure epoxy because CNFs improved the water barrier properties of the composites. The improvements of glass transition temperature and the storage modulus of the composites before and after aging were attributed to the fact that the addition of CNFs limited the loosening of molecular chains and increased the second cross-link density of epoxy resin. FTIR spectroscopy showed that the number of -OH functional groups of CNFs/epoxy composites was decreased, which revealed that CNFs inhibited the hydrolysis of epoxy resin and water absorption. This study demonstrates that adding appropriate amount of CNFs into epoxy resin has potential to improve the long-term durability of epoxy-based composites in hygrothermal environment. (c) 2021 Elsevier Ltd. All rights reserved.
关键词 ：
Carbon nanofibers (CNFs) Carbon nanofibers (CNFs) Epoxy Epoxy Hygrothermal aging Hygrothermal aging Nanocomposites Nanocomposites Durability Durability Aging mechanism Aging mechanism
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| GB/T 7714 | Wang, Yanlei , Meng, Ziping , Zhu, Wanxin et al. Hygrothermal aging behavior and aging mechanism of carbon nanofibers/epoxy composites [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2021 , 294 . |
| MLA | Wang, Yanlei et al. "Hygrothermal aging behavior and aging mechanism of carbon nanofibers/epoxy composites" . | CONSTRUCTION AND BUILDING MATERIALS 294 (2021) . |
| APA | Wang, Yanlei , Meng, Ziping , Zhu, Wanxin , Wan, Baolin , Han, Baoguo , Cai, Gaochuang et al. Hygrothermal aging behavior and aging mechanism of carbon nanofibers/epoxy composites . | CONSTRUCTION AND BUILDING MATERIALS , 2021 , 294 . |
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