Dynamic Properties of Coconut Fibre Reinforced Concrete Encased by BFRP Tube

doi:10.16046/j.cnki.issn2096-5680.2018.02.001

Journal of Hebei University of Water Resources and Electric Engineering ›› 2018, Vol. 28 ›› Issue (2): 1-8.DOI: 10.16046/j.cnki.issn2096-5680.2018.02.001

• Technology Theory and Application • Next Articles

Dynamic Properties of Coconut Fibre Reinforced Concrete Encased by BFRP Tube

ZHU Yu-hao¹,WU Xue-qian¹,LV Yang¹,LI Zi-lin²

1.Tianjin Key Laboratory of Civil Structure Protection and Reinforcement,Tianjin Chengjian University,300384,Tianjin,China;
2.Department of Civil Engineering,Hebei University of Water Resources and Electric Engineering,061001,Cangzhou,Hebei,China

Received:2018-04-10 Online:2018-06-30 Published:2018-07-31

BFRP管约束椰子纤维混凝土的动态性能

朱玉豪¹，吴学乾¹，吕杨¹，李自林²

1.天津城建大学土木建筑结构防护与加固天津市重点实验室，天津市西青区津静路26 号300384;
2.河北水利电力学院土木工程系，河北省沧州市重庆路1 号061001

通讯作者: 吕杨(1984-)，男，重庆市荣昌县人，博士，天津城建大学副教授，从事结构抗震研究｡E-mail: lvyangtju@163.Com
作者简介:朱玉豪(1993-)，男，河北张家口市人，天津城建大学硕士研究生，从事建筑材料研究｡E-mail: 752274163@qq.Com
基金资助:
国家自然科学基金项目(51508373);; 天津市自然科学基金项目(17JCTPJC51300和16JCZDJC38900)

Abstract

Abstract: Coconut fibre reinforced concrete ( CFRC) encased by basalt fibre reinforced polymer ( BFRP) tube has excellent strength and ductility,but fewer researchers considered its dynamic properties such as the damping characteristics and energy absorption capacity. In this study,24 long cylindrical BFRP tube encased CFRC beams with inner diameter of 100 mm and length of 520 mm are prepared. These specimens contain four types of layer arrangements of BFRP tubes,i. e. 0-layer,2-layer,4-layer and 6-layer tube confined PC and 0-layer,2-layer,4-layer and 6-layer tube confined CFRC. The dynamic properties including the natural frequency,dynamic modulus of elasticity and damping ratio are examined using the impact loading test. The results reveals that coconut fibre can improve the damping of the structure,but reduce the dynamic modulus of elasticity and fundamental frequencies,while the BFRC tube can decrease the damping of the structure,but increase the dynamic modulus of elasticity and fundamental frequencies.

Key words: basalt fibre reinforced polymer, coconut fibre, dynamic properties, impact loading test

摘要： 玄武岩纤维增强聚合物(BFRP)管约束的椰子纤维混凝土(CFRC)具有良好的强度和延展性,但很少有人研究其阻尼特性和能量吸收能力等动力学特性。文中设计制作了24根内径为100 mm,长度为520 mm的圆柱形BFRP管约束的CFRC梁,分别为0层、2层、4层、6层BFRC管约束的普通混凝土(PC)和0层、2层、4层、6层BFRC管约束的椰子纤维混凝土(CFRC)。通过敲击载荷试验对BFRC-CFRC的固有频率、动态弹性模量和阻尼比等动态特性进行了研究。试验结果表明,椰子纤维可以提高结构的阻尼,但会降低结构动态弹性模量和基准频率,而BFRC管会降低结构的阻尼,但会增加动态弹性模量和基频。

关键词: 玄武岩纤维增强聚合物, 椰子纤维, 动态性能, 敲击载荷试验

CLC Number:

TU528.572

ZHU Yu-hao, WU Xue-qian, LV Yang, LI Zi-lin. Dynamic Properties of Coconut Fibre Reinforced Concrete Encased by BFRP Tube[J]. Journal of Hebei University of Water Resources and Electric Engineering, 2018, 28(2): 1-8.

朱玉豪, 吴学乾, 吕杨, 李自林. BFRP管约束椰子纤维混凝土的动态性能[J]. 河北水利电力学院学报, 2018, 28(2): 1-8.

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Dynamic Properties of Coconut Fibre Reinforced Concrete Encased by BFRP Tube

BFRP管约束椰子纤维混凝土的动态性能

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