钢板增强小跨高比胶合木梁抗弯性能试验研究
引用文献：
邹艳花 陈伯望 刘陈诚. 钢板增强小跨高比胶合木梁抗弯性能试验研究[J]. 建筑结构，2022，48（24）：93-99.
ZOU Yanhua CHEN Bowang LIU Chencheng. Experimental study on flexural behavior of steel plate reinforced glulam beams with small span-to-height ratio[J]. Building Structure，2022,48（24）：93-99.
摘要：为研究钢板及钢板粘贴方式对小跨高比胶合木梁抗弯性能的影响，对3组9根试件进行了弯曲试验研究，其中包括未加固、底部钢板增强及两侧钢板增强小跨高比胶合木梁。试验结果表明：3组试件的破坏形式均为顺纹剪切脆性破坏，且受弯破坏过程中，受压区高度增大，中性轴位置均略有下移；与未加固小跨高比胶合木梁相比，底部钢板增强对其极限承载力及变形影响不大，而梁两侧钢板增强则能有效提高其极限承载力及变形能力。结合理论分析，提出了一种基于应变的延性系数计算方法，并计算了3组试件的延性系数及抗弯刚度。结果表明：与未加固小跨高比胶合木梁相比，底部钢板增强对其延性影响不大，但其抗弯刚度均值提高了13.8%;梁两侧钢板增强则对其抗弯刚度影响不大，但其延性系数均值提高了19.3%。
关键词：小跨高比胶合木梁；钢板增强；弯曲试验；理论分析；抗弯性能；
基金：湖南省教育厅科学研究项目(20C0341)；国家自然科学基金项目(51578554)。
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[10] 杨昕卉，薛伟，郭楠.钢板增强胶合木梁的抗弯[J].吉林大学学报(工学版),2017,47(2):468-477.
[11] 郭楠，张平阳，左煜，等.竹板增强胶合木梁受弯性能[J].吉林大学学报(工学版),2017,47(3):778-788.
[12] AGNIESZKA WDOWIAK,JANUSZ BROL.Effectiveness of reinforcing bent non-uniform pre-stressed glulam beams with basalt fibre reinforced polymers rods[J].materials,2019,3141(12):1-16.
[13] JIN ZHANG,HAO SHEN,RONGGEN QIU.Short-term flexural behavior of prestressed glulam beams reinforced with curved tendons[J].Journal of Structural Engineering,2020,146(6):1-13.
[14] 刘伟庆，杨会峰.工程木梁的受弯性能试验研究[J].建筑结构学报，2008,29(1):90-95.
[15] 陈伯望，刘陈诚，刘建文，等.小跨高比胶合木梁受弯性能及增强试验研究[J].建筑科学与工程学报，2019,36(6):26-34.
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[17] Timber structures-test methods-cyclic testing of joints made with mechanical fasteners :EN 12512-ISO/DIS 16670 [S].Brussels:Committee Europeen de Normalisation,2001.
[18] Swiss code for timber structures:SIA 265 [S].Zurich (Switzerland):Swiss Society of Engineers and Architects,2003.
[2] 陆伟东，杨会峰，刘伟庆，等.胶合木结构的发展、应用及展望[J].南京工业大学学报(自然科学版),2011,33(5):105-110.
[3] 何敏娟，何桂荣，梁峰，等.中国木结构近20年发展历程[J].建筑结构，2019,49(19):83-90.
[4] ISSAC A,KMEID Z.Advanced wood engineering:glulam beams [J].Construction and Building Materials,2005,19(2):99-106.
[5] 杨会峰，刘伟庆.FRP增强胶合木梁的受弯性能研究[J].建筑结构学报，2007,28(1):64-71.
[6] 杨会峰，刘伟庆.一种新型复合木梁的受弯性能研究[J].建筑结构，2010,40(1):97-99.
[7] ALFREDO S RIBEIRO,ABÍLIO MP DE JESUS,ANTÓNIO M LIMA,et al.Study of strengthening solutions for glued-laminated wood beams of maritime pine wood[J].Construction and Building Materials,2009,23(8):2738-2745.
[8] CÉSAR ECHAVARRÍA,BEATRIZ ECHAVARRÍA,HERNÁN CAÑOLA.Bamboo reinforced glulam beams:an alternative to CFRP reinforced glulam beams[J].Advanced Materials Research,2013,778(5):545-552.
[9] 左宏亮，卜大伟，郭楠，等.玄武岩纤维复合材料对胶合木梁受弯性能的影响[J].东北林业大学学报，2015,43(4):91-95.
[10] 杨昕卉，薛伟，郭楠.钢板增强胶合木梁的抗弯[J].吉林大学学报(工学版),2017,47(2):468-477.
[11] 郭楠，张平阳，左煜，等.竹板增强胶合木梁受弯性能[J].吉林大学学报(工学版),2017,47(3):778-788.
[12] AGNIESZKA WDOWIAK,JANUSZ BROL.Effectiveness of reinforcing bent non-uniform pre-stressed glulam beams with basalt fibre reinforced polymers rods[J].materials,2019,3141(12):1-16.
[13] JIN ZHANG,HAO SHEN,RONGGEN QIU.Short-term flexural behavior of prestressed glulam beams reinforced with curved tendons[J].Journal of Structural Engineering,2020,146(6):1-13.
[14] 刘伟庆，杨会峰.工程木梁的受弯性能试验研究[J].建筑结构学报，2008,29(1):90-95.
[15] 陈伯望，刘陈诚，刘建文，等.小跨高比胶合木梁受弯性能及增强试验研究[J].建筑科学与工程学报，2019,36(6):26-34.
[16] 木结构试验方法标准GB/T 50329—2012 [S].北京：中国建筑工业出版社，2012.
[17] Timber structures-test methods-cyclic testing of joints made with mechanical fasteners :EN 12512-ISO/DIS 16670 [S].Brussels:Committee Europeen de Normalisation,2001.
[18] Swiss code for timber structures:SIA 265 [S].Zurich (Switzerland):Swiss Society of Engineers and Architects,2003.
Experimental study on flexural behavior of steel plate reinforced glulam beams with small span-to-height ratio
Abstract: To study the influence of steel plate and steel plate bonding method on flexural behavior of glulam beams with small span-to-height ratio, a total of 3 groups of 9 glulam beams with small span-to-height ratio were tested, including unreinforced beams, beams reinforced with steel plates at the bottom, beams reinforced with steel plates on both lateral sides. The experimental results show that the failure mode of 3 groups of specimens is shear brittle failure along the grain, and the height of the compression zone increases and the neutral axis slightly moves down during the bending failure process; Compared with the unreinforced glulam beams with small span-to-height ratio, the glulam beams reinforced with steel plates at the bottom has little effect on the ultimate load bearing capacity and the deformation, while the glulam beams reinforced with steel plates on both lateral sides can effectively improve the ultimate load bearing capacity and the deformation. Based on the theoretical analysis, a calculation method of ductility coefficient based on strain was proposed, and the ductility coefficient and flexural stiffnesses of 3 groups of specimens were calculated. The results show that compared with the unreinforced glulam beams with small span-to-height ratio, the glulam beams reinforced with steel plates at the bottom has little effect on its ductility coefficient, but the mean value of flexural stiffness is increased by 13.8%, while the glulam beams reinforced with steel plates on both lateral sides has little effect on its flexural stiffness, but the mean value of ductility coefficient is increased by 19.3%.
Keywords: glulam beam with small span-to-height ratio; steel-plate reinforcement; bending test; theoretical analysis; flexural behavior
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