[1]崔兆彦,王飞,徐明,等.高温下重组竹顺纹销槽承压强度试验研究[J].东南大学学报(自然科学版),2017,47(6):1174-1179.[doi:10.3969/j.issn.1001-0505.2017.06.015]
 Cui Zhaoyan,Wang Fei,Xu Ming,et al.Experimental study on embedding strength of bamboo scrimber parallel to grain at high temperatures[J].Journal of Southeast University (Natural Science Edition),2017,47(6):1174-1179.[doi:10.3969/j.issn.1001-0505.2017.06.015]
点击复制

高温下重组竹顺纹销槽承压强度试验研究()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
47
期数:
2017年第6期
页码:
1174-1179
栏目:
土木工程
出版日期:
2017-11-20

文章信息/Info

Title:
Experimental study on embedding strength of bamboo scrimber parallel to grain at high temperatures
作者:
崔兆彦13王飞2徐明13陈忠范1
1东南大学土木工程学院, 南京 210096; 2安徽省电力设计院有限公司, 合肥 230001; 3东南大学混凝土及预应力混凝土结构教育部重点试验室, 南京 210096
Author(s):
Cui Zhaoyan13 Wang Fei2 Xu Ming13 Chen Zhongfan1
1School of Civil Engineering, Southeast University, Nanjing 210096, China
2Anhui Electric Power Design Institute, Hefei 230001, China
3Key Laboratory of RC & PC Structures of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
重组竹 高温试验 销槽承压强度 破坏模式
Keywords:
bamboo scrimber high temperature test embedding strength failure mode
分类号:
TU366.3
DOI:
10.3969/j.issn.1001-0505.2017.06.015
摘要:
为研究温度对重组竹销槽承压强度的影响,对14组42个重组竹顺纹销槽承压试件采用稳态试验方法进行单调加载直至破坏.试验结果表明:20 ℃时试件的极限销槽承压强度平均值为75.2 MPa,在20~110 ℃时,随着温度增加承压强度逐渐减小,但在110~170 ℃温度区间,由于水分蒸发销槽承压强度出现局部提高现象,当温度升至170~270 ℃,由于竹材内部纤维高温分解承压强度逐渐减小,温度在270 ℃时,销槽承压强度为9.6 MPa.基于5%直径偏移法得出屈服荷载随温度的变化规律,根据温度区间不同,提出了4种典型销槽承压破坏形态.通过对比各国规范和文献,提出了高温下重组竹销槽承压强度的建议计算公式,为火灾下螺栓节点承载力计算提供了理论基础.
Abstract:
To study the effect of temperature on the embedding strength of bamboo scrimber, a total of 42 compressive specimens were tested from the beginning of monotonic loading to failure by the steady-state test method. The results indicate that the embedding strength of the bamboo scrimber parallel to the grain is 75.2 MPa at 20 ℃. With the temperature increasing from 20 ℃ to 110 ℃, the embedding strength of the bamboo scrimber decreases gradually. Due to the evaporation of inherent water and energy consumption, the embedding strength locally increases in the temperature range from 110 ℃ to 170 ℃. As the temperature increases from 170 ℃ to 270 ℃, the embedding strength decreases due to the thermal decomposition of fibre bundles. And, the embedding strength is 9.6 MPa at 270 ℃. The relationship between the bearing yield load of the bamboo scrimber and the temperature was determined by the 5% diameter offset method. Four typical failure modes were provided in different temperature ranges. Through comparing different national standards and literature, the equation for expressing the embedding strength of the bamboo scrimber parallel to the grain at high temperatures was established. This study provides a valuable reference for calculating the bearing capacity of the bolted connection exposed to fire.

参考文献/References:

[1] Sharma B, Gatóo A, Bock M, et al. Engineered bamboo for structural applications[J]. Construction and Building Materials, 2015, 81: 66-73. DOI: 10.1016/j.conbuildmat.2015.01.077.
[2] Johanson K W. Theory of timber connections[M]. Bern: International Association for Bridge and Structural Engineering(IABSE), 1949: 249-262.
[3] Moss P, Buchanan A, Fragiacomo M, et al. Experimental testing and analytical prediction of the behaviour of timber bolted connections subjected to fire[J]. Fire Technology, 2010, 46(1): 129-148. DOI:10.1007/s10694-009-0096-6.
[4] Norén J. Load-bearing capacity of nailed joints exposed to fire[J]. Fire and Materials, 1996, 20(3): 133-143. DOI: 10.1002/(sici)1099-1018(199605)20:3<133::aid-fam565>3.3.co;2-v.
[5] Moraes P D, Rogaume Y, Bocquet J F, et al. Influence of temperature on the embedding strength[J]. European Journal of Wood and Wood Products, 2005, 63(4): 297-302. DOI:10.1007/s00107-004-0568-9.
[6] 黄绍胤,洪敬源,余培明.木结构螺栓连接中销槽木材承压和钢销抗弯的强度[J].重庆建筑工程学院学报,1986(1):11-17.
  Huang Shaoyin, Hong Jingyuan, Yu Peiming. Bearing and bending strength of pin connections in timber structure[J]. Journal of Chongqing Construction Engineering College, 1986(1): 11-17.(in Chinese)
[7] 任海青,李霞镇,钟永,等.重组竹平行纹理方向销槽承压性能的影响因素[J].南京林业大学学报(自然科学版),2013,37(5):103-107.
  Ren Haiqing, Li Xiazhen, Zhong Yong, et al. Influencing factors of bearing properties of dowel parallel to grain of recombinant bamboo[J]. Journal of Nanjing Forestry University(Natural Science Edition), 2013, 37(5): 103-107.(in Chinese)
[8] 周军文,黄东升,赵风华.重组竹销槽承压强度试验研究[J].建筑结构,2015(22):107-110.
  Zhou Junwen, Huang Dongsheng, Zhao Fenghua. Experimental study on dowel-compression strength of parallel bamboo strand lumber[J]. Building Structure, 2015(22): 107-110.(in Chinese)
[9] ASTM International. ASTM D5764—97a(2013)Standard test method for evaluating dowel-bearing strength of wood and wood-based products[S]. West Conshohocken, PA, USA: ASTM International, 2013.
[10] Frangi A, Erchinger C, Fontana M. Experimental fire analysis of steel-to-timber connections using dowels and nails[J]. Fire and Materials, 2010, 34(1): 1-19. DOI:10.1002/fam.994.
[11] Hassan R, Hamid S, Amini N A M, et al. Evaluation of dowel-bearing strength for wood dowel using “spring theory”[C]//Proceedings of the International Civil and Infrastructure Engineering Conference 2013. Kuching, Malaysia, 2014: 75-84. DOI:10.1007/978-981-4585-02-6_7.
[12] British Standards Institution. BS EN 383 Timber structures. Test methods. Determination of embedding strength and foundation values for dowel type fasteners[S]. London: British Standards Institution, 2007.
[13] 《木结构设计手册》编辑委员会.木结构设计手册[M].北京:中国建筑工业出版社,2005:96-97.
[14] 中华人民共和国住房和城乡建设部.GB/T 50708—2012胶合木结构技术规范[S].北京:中国建筑工业出版社,2012.
[15] American Forest & Paper Association. ANSI/AF & PA NDS—1997 National design specification for wood construction[S]. Washington, DC, USA: American Forest & Paper Association, 1997.
[16] Canadian Standards Association. CSA standard O86-09 Engineering design in wood [S]. Toronto: Canadian Standards Association, 2009.
[17] British Standards Institution. BS EN 1995-1-1: 2004 Eurocode 5: Design of timber structures-Part 1-1: General-common rules and rules for buildings[S]. London: British Standards Institution, 2004.
[18] Sawata K, Yasumura M. Determination of embedding strength of wood for dowel-type fasteners[J]. Journal of Wood Science, 2002, 48(2): 138-146. DOI:10.1007/bf00767291.

备注/Memo

备注/Memo:
收稿日期: 2017-04-27.
作者简介: 崔兆彦(1989—),男,博士生;徐明(联系人),男,博士,研究员级高工,xuming@seu.edu.cn.
基金项目: 国家“十二五”科技支撑计划资助项目(2015BAL03B02-02)、江苏省自然科学基金资助项目(BK20151406).
引用本文: 崔兆彦,王飞,徐明,等.高温下重组竹顺纹销槽承压强度试验研究[J].东南大学学报(自然科学版),2017,47(6):1174-1179. DOI:10.3969/j.issn.1001-0505.2017.06.015.
更新日期/Last Update: 2017-11-20