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学者姓名：郭楠
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Abstract ：
As an energy-saving and eco-friendly construction material, the bamboo scrimber (BS) has become a popular engineering bamboo composite in civil engineering. In this study, the flexural behaviour of BS continuous beams with built-in steel bars connected by ultra-high-performance concrete (UHPC) connection is presented. By testing 12 two-span continuous beams with different reinforcement ratios, the failure mode, strain distribution of the longitudinal reinforcements, and the entire process of moment redistribution were compared and analyzed. The results indicated that with an increase in the reinforcement ratio, the bearing capacity of the BS continuous beams increased gradually. The entire moment redistribution process can be divided into two stages. With an increase in the mid-span reinforcement ratios, the degrees of the first-stages and second-stages moment redistribution were improved, while those were decreased with the increase in the intermediate-support reinforcement ratios. To further quantitatively investigate the influence of various parameters on the two-stage moment redistribution, a continuous beam model was established using the ABAQUS finite element software. A parametric study was performed based on 48 simulated specimens, and the influential factors included the reinforcement ratios of the mid-span and intermediate support, the ratios of span to depth, the yielding strengths of the reinforcement, and the loading patterns. Finally, based on the analysis results, practical expressions for the flexural capacity of BS continuous beams considering the moment redistribution were proposed. The predicted results are in good agreement with the analysis results, which provide an effective calculation method for BS continuous beams.
Keyword ：
Bamboo scrimber Bamboo scrimber Continuous beams Continuous beams Flexural behaviour Flexural behaviour Moment redistribution Moment redistribution UHPC connection UHPC connection
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| GB/T 7714 | Li, Ling , Huang, Chuan , Guo, Nan et al. Experimental and numerical investigation of the flexural behaviour of bamboo scrimber continuous beams with built-in steel bars connected by UHPC connection [J]. | ENGINEERING STRUCTURES , 2025 , 325 . |
| MLA | Li, Ling et al. "Experimental and numerical investigation of the flexural behaviour of bamboo scrimber continuous beams with built-in steel bars connected by UHPC connection" . | ENGINEERING STRUCTURES 325 (2025) . |
| APA | Li, Ling , Huang, Chuan , Guo, Nan , Li, Guodong . Experimental and numerical investigation of the flexural behaviour of bamboo scrimber continuous beams with built-in steel bars connected by UHPC connection . | ENGINEERING STRUCTURES , 2025 , 325 . |
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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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Abstract ：
The flexural failure of bamboo scrimber beams is usually derived from the tensile fracture of bamboo fibers, and the compressive strength of bamboo scrimber cannot be fully used. To investigate the bending properties of hot-pressed bamboo scrimber beams and improve their bearing capacity, a newly developed no-damage reinforced bamboo scrimber beam is proposed, in which steel bars are embedded into bamboo scrimber with an integrated shape. Four-point bending loading tests were carried out on twenty-one reinforced bamboo scrimber beams, and the influences of the reinforcement ratio and reinforcement arrangement on the flexural behavior of bamboo scrimber beams were compared and analyzed. The test results showed that when the reinforcement arrangement was the same, compared with ordinary bamboo scrimber beams, the bearing capacity of single-reinforced beams increased by 13.06 %similar to 48.13 %, and the bending stiffness increased by 15.66 %similar to 72.41 % with increasing reinforcement ratio. When the diameter of the reinforcement was the same, the double-reinforced beam had a 28.93 % increase in bearing capacity and a 184.38 % increase in bending stiffness compared with the single-reinforced beam. Moreover, a theoretical analysis of the flexural bearing capacity of the reinforced bamboo scrimber beams was conducted, and a practical calculation model of reinforced bamboo scrimber beams was established based on the tri-linear constitutive model.
Keyword ：
bamboo scrimber beam bamboo scrimber beam flexural performance flexural performance reinforcement reinforcement theoretical models theoretical models
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| GB/T 7714 | Li, Ling , Tan, Yishuai , Zhang, Jianmin et al. Flexural Behavior of a Newly Developed No-Damage Reinforced Bamboo Scrimber Beam: Experimental Investigation and Theoretical Analysis [J]. | JOURNAL OF TESTING AND EVALUATION , 2025 . |
| MLA | Li, Ling et al. "Flexural Behavior of a Newly Developed No-Damage Reinforced Bamboo Scrimber Beam: Experimental Investigation and Theoretical Analysis" . | JOURNAL OF TESTING AND EVALUATION (2025) . |
| APA | Li, Ling , Tan, Yishuai , Zhang, Jianmin , Guo, Nan , Zhao, Yan . Flexural Behavior of a Newly Developed No-Damage Reinforced Bamboo Scrimber Beam: Experimental Investigation and Theoretical Analysis . | JOURNAL OF TESTING AND EVALUATION , 2025 . |
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To improve the stiffness of extension beams effectively, steel-concrete composite semirigid joints with embedded reinforcement in bamboo scrimber extension beams, which include ordinary extension beams and extension beams reinforced with single steel plates, double steel plates, built-in I-beams, and built-in steel boxes, are proposed. Subsequently, central concentrated load tests are conducted on 15 beams to comparatively analyse their failure modes, ultimate loads, and strain parameters and to investigate the flexural performance of the beams under different node connection methods. The results indicate that the failure modes of the beams with node extension fall into two main categories: uniform vertical cracking in the concrete and interface cracking between the concrete and bamboo scrimber. Compared with ordinary extension beams, reinforced extension beams present a 16-73.3 % greater ultimate load capacity. The built-in steel box provides the highest ultimate load-bearing capacity, reaching 38.34 kN. Additionally, the initial rotational stiffness improves by 60.4-96.1 %, and the increase in stiffness is significantly greater than the improvement in ultimate load capacity. On the basis of the theoretical analysis, a load capacity formula for steel-concrete composite semirigid joints with embedded reinforcement in bamboo scrimber extension beams was developed, and its applicability was verified. Steel-concrete composite semirigid joints with embedded reinforcement in bamboo scrimber extension beams, an innovative construction technology, combine the advantages of reinforcing steel, bamboo scrimber, and concrete. They hold great potential for applications in green construction, sustainable development, and innovative structural design.
Keyword ：
Bamboo scrimber with embedded Bamboo scrimber with embedded Concrete node Concrete node Extension beam Extension beam reinforcement reinforcement Reinforcement method Reinforcement method Rigid joint degree Rigid joint degree Ultimate load capacity Ultimate load capacity
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| GB/T 7714 | Di, Jing , Huang, Xiayu , Liao, Xiaojie et al. Study of the flexural performance of steel-concrete composite semirigid joints with embedded reinforcement in bamboo scrimber extension beams [J]. | STRUCTURES , 2025 , 75 . |
| MLA | Di, Jing et al. "Study of the flexural performance of steel-concrete composite semirigid joints with embedded reinforcement in bamboo scrimber extension beams" . | STRUCTURES 75 (2025) . |
| APA | Di, Jing , Huang, Xiayu , Liao, Xiaojie , Wu, Mingtao , Zhao, Yan , Guo, Nan . Study of the flexural performance of steel-concrete composite semirigid joints with embedded reinforcement in bamboo scrimber extension beams . | STRUCTURES , 2025 , 75 . |
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The purpose of this paper is to investigate the effect of the freeze-thaw cycles on the mechanical property of the engineering bamboo scrimber (BS) in three main directions (parallel-to-grain direction, perpendicular-to-grain I and II directions). Therefore, a series of tensile and compression specimens experiencing different freeze-thaw cycles were employed for the mechanical property test. The experimental results show that freeze-thaw cycles did not alter the primary failure modes but increased the occurrence of specific damage patterns (e.g., Z-shaped cracks) with more cycles. The mechanical properties (e.g. strength and modulus of elasticity) of BS degraded progressively in all three directions under freeze-thaw exposure. However, the shape of tensile and compressive stress-strain curves cannot be influenced. Besides, the tensile and compressive stress-strain models in the three different directions, which consider the effect of freeze-thaw cycles, are established, by combining the experimental results and the existing stress-strain models, which show reasonable accuracy.
Keyword ：
Bamboo scrimber (BS) Bamboo scrimber (BS) Failure mode Failure mode Freeze-thaw cycles Freeze-thaw cycles Mechanical property Mechanical property Stress-strain model Stress-strain model
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| GB/T 7714 | Wu, Mingtao , Mei, Lidan , Lin, Xueyan et al. Effect of freeze-thaw cycles on mechanical properties and failure modes of bamboo scrimber [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 483 . |
| MLA | Wu, Mingtao et al. "Effect of freeze-thaw cycles on mechanical properties and failure modes of bamboo scrimber" . | CONSTRUCTION AND BUILDING MATERIALS 483 (2025) . |
| APA | Wu, Mingtao , Mei, Lidan , Lin, Xueyan , Tan, Yishuai , Guo, Nan , Zhao, Yan . Effect of freeze-thaw cycles on mechanical properties and failure modes of bamboo scrimber . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 483 . |
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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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A bolted bamboo-steel-bamboo connection is a typical beam-column connection formed in bamboo and timber structures. However, due to the clearance between the bolts and the holes, these joints exhibit low stiffness and large deformation and are often considered hinged connections in design. Therefore, this paper proposes a novel beam-column joint, namely, a bamboo scrimber beam-column connected to a concrete joint embedded with steel-reinforcing bars, which includes one basic configuration and three reinforced configurations. To quantitatively evaluate the mechanical performance of the new joint, monotonic and low-cycle reversed loading tests were conducted on both traditional bolted bamboo-steel-bamboo connection joints and the proposed novel beam-column joints. The results indicate that, compared with bolted bamboo-steel-bamboo connection joints, the novel beam-column joints exhibit 6.18-7.27 times greater bearing capacity and 4.09-5.73 times greater elastic stiffness. Furthermore, compared with unreinforced novel beam-column joints, the adoption of external steel plates, built-in steel components, and cross-steel reinforcement enhances the bearing capacity by 4.2-15.2 % and the elastic stiffness by 3.57-32.1 %. To quantitatively evaluate the stiffness of the novel joints, a rigid joint coefficient was proposed. The results show that all the novel joints are semirigid connections, with the externally reinforced steel plate joint demonstrating the highest stiffness among the configurations. The finite element method (FEM) was utilized to simulate four novel joint configurations, with two innovative reinforcement techniques and three experimental parameters subjected to further investigation. The results indicate that both angle steel and ribbed angle steel can enhance the stiffness of the joints. It was also found that using higher-grade steel bars, larger haunch dimensions in the externally attached steel plates, and higher column reinforcement ratios can improve the joint stiffness, with the column reinforcement ratio having a more significant effect on stiffness enhancement.
Keyword ：
Bamboo scrimber Bamboo scrimber Beam - column joint Beam - column joint Rigid connection degree coefficient Rigid connection degree coefficient Stress performance Stress performance Test study Test study
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| GB/T 7714 | Di, Jing , Liao, Xiaojie , Huang, Xiayu et al. Experimental study and numerical simulation of the mechanical behaviour of a bamboo scrimber beam-column connected to a concrete joint embedded with steel-reinforcing bars [J]. | STRUCTURES , 2025 , 81 . |
| MLA | Di, Jing et al. "Experimental study and numerical simulation of the mechanical behaviour of a bamboo scrimber beam-column connected to a concrete joint embedded with steel-reinforcing bars" . | STRUCTURES 81 (2025) . |
| APA | Di, Jing , Liao, Xiaojie , Huang, Xiayu , Wu, Mingtao , Zhao, Yan , Guo, Nan . Experimental study and numerical simulation of the mechanical behaviour of a bamboo scrimber beam-column connected to a concrete joint embedded with steel-reinforcing bars . | STRUCTURES , 2025 , 81 . |
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