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学者姓名:盛叶
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Abstract :
本发明公开了一种可用于竹木梁增强加固的张拉调节螺栓‑钢带预应力装置,包括:受拉钢带和张力调节螺栓组件,受拉钢带两端分别通过一个紧固组件固定在竹木梁两端,用于分担被增强加固竹木梁下层木纤维受到的拉力,进而达到增强加固的效果;张力调节螺栓组件设置在竹木梁中部,位于受拉钢带与张力调节螺栓组件之间,用于调整受拉钢带距离木梁的距离,从而调节受拉钢带的张紧程度,从而对竹木梁施加预应力,通过对梁施加预应力能够有效地减小初始变形,在使用阶段施加预应力能够减小或消除蠕变带来的影响,实现两阶段的变形控制,从而控制竹木梁的变形,调节截面的应力分布,减小梁底拉应力,从而提高竹木梁整体的承载能力,改善梁的破坏形态。
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| GB/T 7714 | 郭楠 , 郑田田 , 邓剑锋 et al. 用于竹木梁增强加固的张拉调节螺栓-钢带预应力装置 : CN202411840047.9[P]. | 2024-12-13 . |
| MLA | 郭楠 et al. "用于竹木梁增强加固的张拉调节螺栓-钢带预应力装置" : CN202411840047.9. | 2024-12-13 . |
| APA | 郭楠 , 郑田田 , 邓剑锋 , 刘瑞君 , 盛叶 , 林经康 et al. 用于竹木梁增强加固的张拉调节螺栓-钢带预应力装置 : CN202411840047.9. | 2024-12-13 . |
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重组竹材料内部存在微裂纹和层间空隙,高温处理后如果承受冲击荷载,容易发生断裂破坏,影响结构性能。选取3个无量纲裂缝长度(0.4,0.5,0.6)、5个含水率(4%,8%,10%,12%,16%)和6个试验温度(20,80,130,180,230,280℃)为参数,进行重组竹横纹直槽半圆盘试件三点弯曲断裂试验。为了对比加载率对重组竹横纹Ⅰ型断裂韧度的影响,通过分离式霍普金森压杆(SHPB)控制气压达到3种不同的加载速度,分别以冲击速度6,7,8 m/s为参数,分析断裂韧度随温度、含水率及冲击速度的变化规律,并提出了动力影响系数公式。试验结果表明:重组竹横纹Ⅰ型动态断裂韧度在相同无量纲裂纹长度和冲击速度下的变化趋势和准静态加载条件下基本相同,随着含水率由4%上升至16%,断裂韧度呈先上升后下降的趋势,在含水率为10%时断裂韧度最大;随着温度由20℃上升至280℃,断裂韧度呈逐渐下降趋势,当温度超过180℃时,部分试件的断裂韧度下降程度更为明显。通过研究重组竹在高温处理后的断裂力学特性,为重组竹材料的相关规范制定提供了理论基础,从而促进其在工程结构领域的广泛应用。
Keyword :
Ⅰ型 Ⅰ型 断裂韧度 断裂韧度 重组竹 重组竹 霍普金森压杆(SHPB) 霍普金森压杆(SHPB) 高温处理 高温处理
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| GB/T 7714 | 吴前煌 , 郭任坤 , 郭楠 et al. 重组竹高温处理后的Ⅰ型断裂力学特性 [J]. | 林业工程学报 , 2025 , 10 (04) : 19-27 . |
| MLA | 吴前煌 et al. "重组竹高温处理后的Ⅰ型断裂力学特性" . | 林业工程学报 10 . 04 (2025) : 19-27 . |
| APA | 吴前煌 , 郭任坤 , 郭楠 , 饶久平 , 杨文斌 , 盛叶 . 重组竹高温处理后的Ⅰ型断裂力学特性 . | 林业工程学报 , 2025 , 10 (04) , 19-27 . |
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本发明属于土木工程技术领域,具体公开了一种重组竹‑混凝土连续梁及其制备方法,重组竹‑混凝土连续梁包括两个重组竹梁,两个所述重组竹梁之间浇筑有混凝土梁,构成基梁,还包括至少一个第一钢筋组件,第一钢筋组件包括第一钢管、第一钢筋以及第一锚固件,第一钢管沿重组竹梁梁长方向设置重组竹梁内。第一钢筋穿设在第一钢管内。第一锚固件设于第一钢筋的两端,用于将第一钢筋的两端分别固定在两个重组竹梁远离混凝土梁的一端,通过第一锚固件增大对第一钢筋端部锚固度以对基梁施加预应力。制备方法为:制备重组竹梁、钢筋的安装、制备混凝土梁以及预应力的施加。本发明有效的提高了重组竹‑混凝土连续梁的刚度。
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| GB/T 7714 | 郭楠 , 邓剑锋 , 郑田田 et al. 一种重组竹-混凝土连续梁及其制备方法 : CN202411840053.4[P]. | 2024-12-13 . |
| MLA | 郭楠 et al. "一种重组竹-混凝土连续梁及其制备方法" : CN202411840053.4. | 2024-12-13 . |
| APA | 郭楠 , 邓剑锋 , 郑田田 , 刘瑞君 , 盛叶 , 林经康 et al. 一种重组竹-混凝土连续梁及其制备方法 : CN202411840053.4. | 2024-12-13 . |
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重组竹作为建筑材料时,除了受静态荷载外,还会受到冲击荷载的作用。特别是当重组竹建筑在经受火灾后,若再承受水平方向的冲击荷载,结构本身的缺陷在外力作用下有可能被放大。基于重组竹在静态下的力学性能研究,采用霍普金森压杆系统在10、13和16 m/s的冲击速度下对不同温度处理的重组竹横纹抗压试件进行动态力学性能试验研究。结果表明,在冲击速度相同时,当温度从20℃升至180℃时,重组竹横纹动态抗压比例极限强度和抗压弹性模量呈逐步上升的趋势,温度从180℃升至280℃时,横纹动态抗压比例极限强度和抗压弹性模量呈快速下降的趋势。基于此,提出不同温度处理重组竹横纹动态抗压比例极限强度和抗压弹性模量的影响系数计算公式,为重组竹构件在高温与冲击耦合作用下的工程应用提供理论依据与技术参考。
Keyword :
冲击荷载 冲击荷载 分离式霍普金森压杆 分离式霍普金森压杆 加载率 加载率 温度 温度 重组竹 重组竹
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| GB/T 7714 | 薛兆丰 , 盛叶 , 郭任坤 et al. 不同温度处理对重组竹横纹冲击力学性能的影响 [J]. | 木材科学与技术 , 2025 , 39 (03) : 33-40 . |
| MLA | 薛兆丰 et al. "不同温度处理对重组竹横纹冲击力学性能的影响" . | 木材科学与技术 39 . 03 (2025) : 33-40 . |
| APA | 薛兆丰 , 盛叶 , 郭任坤 , 郭楠 , 董帅 . 不同温度处理对重组竹横纹冲击力学性能的影响 . | 木材科学与技术 , 2025 , 39 (03) , 33-40 . |
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Bamboo scrimber is an eco-friendly material with anisotropic characteristics that differ from steel and concrete. The external humidity and varying loading directions significantly impact its mechanical properties. Thus, this study focuses on examining the compressive strength of bamboo scrimber under varying grain angles and moisture levels and then proposes a predictive model. The test results indicate that diagonal shear failure and crushing failure are possible failure modes based on the values of the grain angle and moisture content. Also, as the grain angle increases from 0 degrees to 90 degrees or the moisture content increases from 4% to 20%, the compressive elastic modulus and compressive strength decrease, with reductions slowing after 60 degrees and 8%, respectively. Based on the Hankinson formula, a prediction dual model for the compressive strength under different grain angles and moisture contents is proposed. The proposed model predicts the compressive strength at any angle within the moisture content of 4% to 20%, providing a valuable theoretical foundation for enhancing its application in civil engineering.
Keyword :
Bamboo scrimber Bamboo scrimber Compressive strength Compressive strength Grain angle Grain angle Moisture content Moisture content
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| GB/T 7714 | Su, Hongwei , Zhang, Feng , Jiang, Fengjiao et al. Effects of Grain Angle and Moisture Content on the Compressive Properties of Engineered Bamboo Scrimber [J]. | JOURNAL OF MATERIALS IN CIVIL ENGINEERING , 2025 , 37 (9) . |
| MLA | Su, Hongwei et al. "Effects of Grain Angle and Moisture Content on the Compressive Properties of Engineered Bamboo Scrimber" . | JOURNAL OF MATERIALS IN CIVIL ENGINEERING 37 . 9 (2025) . |
| APA | Su, Hongwei , Zhang, Feng , Jiang, Fengjiao , Sheng, Ye , Mohamed, Hazem Samih , Guo, Nan . Effects of Grain Angle and Moisture Content on the Compressive Properties of Engineered Bamboo Scrimber . | JOURNAL OF MATERIALS IN CIVIL ENGINEERING , 2025 , 37 (9) . |
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This study examines the uniaxial compressive mechanical properties of after high temperature bamboo scrimber, taking into account the combined effects of temperature, constant temperature duration, and moisture content. A series of 46 uniaxial compression tests were conducted on bamboo scrimber under various conditions to investigate the failure modes after high temperatures. The analysis focuses on the changes in compressive elastic modulus and peak stress of bamboo scrimber parallel and perpendicular to the grain, in relation to temperature, constant temperature duration, and moisture content. The findings reveal that below 180 degrees C, diagonal shear failure and Y-type shear failure are the primary failure modes for specimens parallel to the grain, while diagonal shear failure predominates for specimens perpendicular to the grain. Above 180 degrees C, bond failure and eccentric crushing become the main failure modes for specimens parallel and perpendicular to the grain, respectively. The peak compressive stress decreases significantly beyond 180 degrees C, with a slower decrease observed as moisture content increases. Constant temperature duration has a notable impact on peak stress, with longer durations resulting in lower peak stress at the same temperature. Although temperature has a lesser effect on the elastic modulus compared to peak stress, empirical formulas were derived to establish the relationship between compressive elastic modulus and peak stress reduction coefficient with variations in temperature, constant temperature duration, and moisture content based on the experimental data.
Keyword :
After high temperature After high temperature Bamboo scrimber Bamboo scrimber Compressive properties Compressive properties Elastic modulus Elastic modulus Peak stress Peak stress
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| GB/T 7714 | Sheng, Ye , Xu, Qingliang , Zhang, Feng et al. Experimental study on axial compressive properties of bamboo scrimber after high temperature [J]. | CASE STUDIES IN CONSTRUCTION MATERIALS , 2024 , 21 . |
| MLA | Sheng, Ye et al. "Experimental study on axial compressive properties of bamboo scrimber after high temperature" . | CASE STUDIES IN CONSTRUCTION MATERIALS 21 (2024) . |
| APA | Sheng, Ye , Xu, Qingliang , Zhang, Feng , Xie, Zhirui , Shao, Wenzhe , Guo, Nan et al. Experimental study on axial compressive properties of bamboo scrimber after high temperature . | CASE STUDIES IN CONSTRUCTION MATERIALS , 2024 , 21 . |
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Drop-weight impact tests were conducted on bamboo scrimber beams to assess their resistance to dynamic stress. The study focused on investigating the influence of impact orientation, velocity, and cross-section size on failure modes and mechanical behavior. A comparison of data between dynamic impact and static load conditions consistently showed failure via cracking at the bottom of the beam. The severity of damage increased with impact velocity. Beams with greater stiffness exhibited less deformation, increased peak force, and reduced deflection. The energy absorption increased nonlinearly with impact speed, eventually stabilizing at higher velocities. Additionally, it was observed that increased stiffness led to a slight reduction in energy dissipation. The study also demonstrated the presence of inertia effects in bamboo beams during impact and proposed a design approach for enhancing impact resilience. Furthermore, a predictive model was developed to estimate the maximum deflection under dynamic conditions.
Keyword :
Bamboo scrimber Bamboo scrimber Deformation characteristics Deformation characteristics Energy dissipation ratio Energy dissipation ratio Failure modes Failure modes Impact loading Impact loading Inertia effect Inertia effect
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| GB/T 7714 | Sheng, Ye , Huang, Genglang , Peng, Jiahao et al. Experimental study on the impact resistance of bamboo scrimber beams under impact loading [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 413 . |
| MLA | Sheng, Ye et al. "Experimental study on the impact resistance of bamboo scrimber beams under impact loading" . | CONSTRUCTION AND BUILDING MATERIALS 413 (2024) . |
| APA | Sheng, Ye , Huang, Genglang , Peng, Jiahao , Zhang, Feng , Xie, Zhirui , Guo, Nan et al. Experimental study on the impact resistance of bamboo scrimber beams under impact loading . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 413 . |
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针对多重同步挤压变换及其改进算法存在的未重排点问题,提出了一种基于最大系数的多重同步挤压变换(maximum coefficient based multi-synchrosqueezing transform,简称MCMSST)方法来识别时变结构非平稳响应信号的瞬时频率(instantaneous frequency,简称IF)。首先,引入傅里叶频谱来辅助多分量响应信号选取截止频率;其次,对响应信号进行短时傅里叶变换(short time fourier transform,简称STFT),针对短时傅里叶变换系数求取针对时间的偏导,从而获得估算的瞬时频率;然后,在对瞬时频率的估算值进行多次迭代的基础上,仅保留时频系数模值最大处所对应的估算瞬时频率,并将其余位置的瞬时频率值归零;最后,对时频系数模值最大处所对应的瞬时频率进行时频重排即可得到细化后的瞬时频带。由于基于MCMSST方法提取的是瞬时频带,故采用时频系数模极大值法在限定的频带范围内提取瞬时频率曲线。通过2组数值算例和1个铝合金悬臂梁质量突变试验,验证了所提方法的有效性。研究结果表明,MCMSST方法不仅彻底解决了未重排点问题,而且提高了瞬时频率的识别精度和抗噪能力。
Keyword :
多重同步挤压变换 多重同步挤压变换 时变 时变 时频系数 时频系数 未重排点 未重排点 瞬时频率 瞬时频率
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| GB/T 7714 | 刘景良 , 李宇祖 , 苏杰龙 et al. 最大系数多重同步挤压变换识别结构瞬时频率 [J]. | 振动.测试与诊断 , 2024 , 44 (01) : 37-43,195 . |
| MLA | 刘景良 et al. "最大系数多重同步挤压变换识别结构瞬时频率" . | 振动.测试与诊断 44 . 01 (2024) : 37-43,195 . |
| APA | 刘景良 , 李宇祖 , 苏杰龙 , 盛叶 , 骆勇鹏 . 最大系数多重同步挤压变换识别结构瞬时频率 . | 振动.测试与诊断 , 2024 , 44 (01) , 37-43,195 . |
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本研究选取3组不同密度(1.10、1.20、1.30 g/cm~3)和5组不同含水率(4%,8%,12%,16%,20%)的重组竹试件进行顺纹抗拉、抗压试验,分析不同密度和含水率作用下重组竹顺纹抗拉、抗压弹性模量的变化规律。结果发现,重组竹顺纹抗拉、抗压弹性模量随密度的增大而增大,随含水率的升高而减小并趋于平衡;通过试验研究和数据拟合提出重组竹顺纹抗拉、抗压弹性模量的双参数耦合模型,线性组合模型和ASTM组合模型均能较好地预测重组竹顺纹抗拉、抗压弹性模量随密度和含水率变化后的理论值,顺纹抗拉弹性模量的实测值与线性组合模型和ASTM组合模型预测值之间最大误差为5.28%和8.20%;顺纹抗压弹性模量的实测值与线性组合模型和ASTM组合模型预测值之间最大误差为8.91%和8.67%,因线性组合模型计算更为简便,建议在实际应用中优先选用。
Keyword :
含水率 含水率 密度 密度 抗压弹性模量 抗压弹性模量 模型预测 模型预测 重组竹 重组竹 顺纹抗拉 顺纹抗拉
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| GB/T 7714 | 黄庚浪 , 盛叶 , 张峰 et al. 密度与含水率双因素作用下重组竹顺纹弹性模量的预测与分析 [J]. | 木材科学与技术 , 2024 , 38 (02) : 60-67 . |
| MLA | 黄庚浪 et al. "密度与含水率双因素作用下重组竹顺纹弹性模量的预测与分析" . | 木材科学与技术 38 . 02 (2024) : 60-67 . |
| APA | 黄庚浪 , 盛叶 , 张峰 , 江凤娇 , 叶小凡 . 密度与含水率双因素作用下重组竹顺纹弹性模量的预测与分析 . | 木材科学与技术 , 2024 , 38 (02) , 60-67 . |
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木拱廊桥是木结构古建筑中重要的文化遗产,现存的部分木拱廊桥仍在使用中.为保护木拱廊桥,考虑各种复杂的环境因素和结构条件,将应力波和超声波检测技术应用于真实环境下的木拱廊桥检测中.挑选福州市闽侯县远济桥的承重木柱作为研究对象,针对木柱内部缺陷采用应力波检测与超声波检测.检测结果表明应力波和超声波检测木材缺陷时,超声波的检测精度更高,二者检测结果存在相似性;远济桥检测样本的承重木柱存在空洞、裂纹、虫蛀等缺陷,建议对远济桥的安全性进行优化和改进.基于木拱廊桥所处环境的实际情况,利用应力波和超声波检测相对照的检测方法,提出针对木拱廊桥的安全性等级进行划分,使应力波和超声波检测技术更好地应用于木拱廊桥的保护工程中.
Keyword :
应力波 应力波 无损检测 无损检测 木拱廊桥 木拱廊桥 木材缺陷 木材缺陷 超声波 超声波
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| GB/T 7714 | 郑益锋 , 王宇航 , 林睿睿 et al. 应力波和超声波检测在木拱廊桥安全评估中的应用 [J]. | 哈尔滨商业大学学报(自然科学版) , 2024 , 40 (01) : 64-70 . |
| MLA | 郑益锋 et al. "应力波和超声波检测在木拱廊桥安全评估中的应用" . | 哈尔滨商业大学学报(自然科学版) 40 . 01 (2024) : 64-70 . |
| APA | 郑益锋 , 王宇航 , 林睿睿 , 岳小泉 , 盛叶 , 陈开锋 . 应力波和超声波检测在木拱廊桥安全评估中的应用 . | 哈尔滨商业大学学报(自然科学版) , 2024 , 40 (01) , 64-70 . |
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