Traffic & Transportation Engineering

Reinforcement Design of BFRP-Reinforced Continuously-Reinforced Concrete Pavement

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  • 1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Administration Bureau for Highway of Guangdong Province,Guangzhou 510075,Guangdong,China.
张丽娟( 1968-) ,女,博士,副教授,主要从事路面工程研究.

Received date: 2016-05-20

  Revised date: 2016-08-12

  Online published: 2017-03-01

Supported by

Supported by the National Natural Science Foundation of China( 51278201)

Abstract

In this paper,first,a model to describe the uniform temperature drop of BFRP ( Basalt Fiber-Reinforced Plastics) bar-reinforced CRCP ( Continuously Reinforced Concrete Pavement) is proposed.Next,by taking into consideration the dry shrinkage of concrete and the constraint by base,the formulas for the analytical solution of such crack control indicators as crack spacing,crack width and reinforcement stress are derived and verified through finite element simulation.Then,the effects of BFRP bar design and the corresponding material properties on crack control indicators are analyzed,and the indicators for the reinforcement design of BFRP-reinforced CRCP are recommended.The results show that ( 1) the crack spacing,crack width and reinforcement stress of BFRP bar all decrease with the increase of the percentage of longitudinal reinforcement,and smaller diameter and spacing of BFRP bar is better for the control of cracks at the same percentage of longitudinal reinforcement; ( 2) with the increase of the elastic modulus of BFRP bar and with the bond stiffness between BFRP bar and concrete,both the crack spacing and the crack width decrease,while the reinforcement stress of BFRP bar almost remains unchanged; and some engineering countermeasures should be adopted to improve the elastic modulus of BFRP bar and the bond stiffness coefficient between BFRP bar and concrete.Moreover,for the reinforcement design of BFRP-reinforced CRCP,three crack control indicators are recommended,namely an average crack spacing limit of 2. 0 m,a crack width limit of 1. 0mm and a percentage of longitudinal reinforcement of not less than 0. 6%.

Cite this article

ZHANG Li-juan XU Zhong-zheng ZHONG Qing-wen . Reinforcement Design of BFRP-Reinforced Continuously-Reinforced Concrete Pavement[J]. Journal of South China University of Technology(Natural Science), 2017 , 45(4) : 74 -80 . DOI: 10.3969/j.issn.1000-565X.2017.04.011

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