[1]石文博,缪林昌,王佳奇,等.循环荷载作用下不同配比EPS轻质混凝土阻尼比变化规律[J].东南大学学报(自然科学版),2016,46(1):179-183.[doi:10.3969/j.issn.1001-0505.2016.01.029]
 Shi Wenbo,Miao Linchang,Wang Jiaqi,et al.Damping behavior of lightweight expanded polystyrene concrete under dynamic cyclic loading[J].Journal of Southeast University (Natural Science Edition),2016,46(1):179-183.[doi:10.3969/j.issn.1001-0505.2016.01.029]
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循环荷载作用下不同配比EPS轻质混凝土阻尼比变化规律()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第1期
页码:
179-183
栏目:
材料科学与工程
出版日期:
2016-01-20

文章信息/Info

Title:
Damping behavior of lightweight expanded polystyrene concrete under dynamic cyclic loading
作者:
石文博1缪林昌1王佳奇1严波2郭祥贵2陈艺南1
1东南大学交通学院, 南京 210096; 2江苏省城市轨道交通研究设计院股份有限公司, 南京210029
Author(s):
Shi Wenbo1 Miao Linchang1 Wang Jiaqi1 Yan Bo2 Guo Xianggui2 Chen Yinan1
1School of Transportation, Southeast University, Nanjing 210096, China
2Jiangsu Urban Mass Transit Research & Design Institute Co., Ltd., Nanjing 210029, China
关键词:
EPS混凝土 动力循环试验 阻尼比 耐久性
Keywords:
expanded polystyrene concrete dynamic cyclic loading tests damping ratio durability
分类号:
TU528.2
DOI:
10.3969/j.issn.1001-0505.2016.01.029
摘要:
通过对EPS颗粒体积分数为0%,20%,30%,40%的轻质混凝土施加5×104次频率为5 Hz的循环动荷载进行循环动力试验,对测得的数据进行计算分析,得出不同配比的EPS轻质混凝土阻尼比的变化规律.通过测定经过动力循环试验的轻质混凝土的强度,研究轻质混凝土的耐久性能.结果显示,EPS含量越高,阻尼比越大;施加的荷载越大,阻尼比的变化越明显.经过5×104次循环动载试验后EPS轻质混凝土强度减少不明显,量化阻尼比规律和耐久性对EPS轻质混凝土在长期循环施工的实际工程中的使用具有重要的意义.
Abstract:
Cyclic loading tests with 50 000 times were conducted on the lightweight concrete(LWC)with different EPS(expanded polystyrene)volume contents of 0%, 20%, 30% and 40% at the frequency of 5 Hz. By the computational analysis of the experimental data, the damping change laws of LWC with different EPS ratios were obtained. After dynamic cyclic loading tests, the intensity of LWC was measured and then the durability of LWC was studied. The experimental results show that the higher the inclusion content, the higher the damping ratio of the LWC. The larger the applying load, the more obvious the damping ratio changes. However, the strength of LWC has no evident decrease after loading tests of 50 000 times. The quantization of damping rules and the durability have practical significance in use of the LWC in some practical engineering for suffering long-term dynamic cyclic loading.

参考文献/References:

[1] Cook D J. Expanded polystyrene concrete[J]. Concrete Technology and Design, New Concrete Materials, 1983, 1:41-69.
[2] Miled K, Sab K, Le Roy R. Particle size effect on EPS lightweight concrete compressive strength: experimental investigation and modelling[J]. Mechanics of Materials, 2007, 39(3): 222-240. DOI:10.1016/j.mechmat.2006.05.008.
[3] 甘伟, 张传镁, 徐诚坤, 等. 中密度级轻珠商品混凝土在填充工程中的应用[J]. 新型建筑材料, 2006, 33(9):1-3. DOI:10.3969/j.issn.1001-702X.2006.09.001.
  Gan Wei, Zhang Chuanmei, Xu Chengkun, et al. Application of intermediate density lightweight foam bead commercial concrete to filling engineering[J]. New Building Materials, 2006, 33(9):1-3.DOI: 10.3969/j.issn.1001-702X.2006.09.001.(in Chinese)
[4] Dima S O, Sarbu A, Dobre T,et al. Rheological behaviour of lightweight concrete with embedded EPS beads[J]. Materiale Plastice,2009, 46(3): 224-229.
[5] Babu D S, Babu K G, Tiong-Huan W. Effect of polystyrene aggregate size on strength and moisture migration characteristics of lightweight concrete[J]. Cement and Concrete Composites, 2006, 28(6): 520-527. DOI:10.1016/j.cemconcomp.2006.02.018.
[6] Bouvard D, Chaix J M, Dendievel R, et al. Characterization and simulation of microstructure and properties of EPS lightweight concrete[J]. Cement and Concrete Research, 2007, 37(12): 1666-1673. DOI:10.1016/j.cemconres.2007.08.028.
[7] 彭家惠, 陈明凤,张建新. 废聚苯乙烯泡沫塑料作保温砂浆轻骨料的研究[J]. 建筑材料学报, 2002, 5(2):166-170. DOI:10.3969/j.issn.1007-9629.2002.02.012.
  Peng Jiahui, Chen Mingfeng, Zhang Jianxin. Study on waste expanded polystyrene as lightweight aggregate for thermal insulating mortar[J]. Journal of Building Materials, 2002, 5(2):166-170.DOI:10.3969/j.issn.1007-9629.2002.02.012.(in Chinese)
[8] Miled K, Roy R L, Sab K, et al. Compressive behavior of an idealized EPS lightweight concrete:Size effects and failure mode [J]. Mechanics of Materials, 2004, 36(11):1031-1046.
[9] 陈兵, 涂思炎, 翁友法. EPS 轻质混凝土性能研究[J]. 建筑材料学报, 2007, 10(1): 26-31. DOI:10.3969/j.issn.1007-9629.2007.01.005.
  Chen Bing, Tu Siyan, Weng Youfa. Study on the properties of lightweight expanded polystyrene concrete[J]. Journal of Building Materials, 2007, 10(1): 26-31. DOI:10.3969/j.issn.1007-9629.2007.01.005.(in Chinese)
[10] Shi W B, Miao L C, Luo J, et al. Durability of modified expanded polystyrene concrete after dynamic cyclic loading[J]. Shock and Vibration, 2015, 501: 317106.
[11] 谢定义. 土动力学[M].北京:高等教育出版社,2011:297-299.

备注/Memo

备注/Memo:
收稿日期: 2015-08-06.
作者简介: 石文博(1988—),男,博士生; 缪林昌(联系人),男,博士,教授,博士生导师, Lc.miao@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51278099).
引用本文: 石文博,缪林昌,王佳奇,等.循环荷载作用下不同配比EPS轻质混凝土阻尼比变化规律[J].东南大学学报(自然科学版),2016,46(1):179-183. DOI:10.3969/j.issn.1001-0505.2016.01.029.
更新日期/Last Update: 2016-01-20