期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 111, 期 -, 页码 85-97出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2016.01.054
关键词
Recycled aggregate concrete (RAC); Fiber reinforced polymer (FRP); Confinement; Compressive behavior; Stress-strain relationship
资金
- Department of Education of Guangdong Province for Excellent Young College Teacher of Guangdong Province [Yq2013056]
- National Natural Science Foundation of China [51108410, 51278129, 51278132]
- Guangdong Natural Science Foundation [S2011010004929]
- Guangdong University of Technology via its One-hundred Talents Plan program [112418016, 112418032]
Over the past decade, recycled aggregate concrete (RAC) has attracted world-wide research interests due to its environmental and economic significance. However, RAC has mainly been limited to non-structural uses, largely due to the disadvantages of RAC (e.g. lower strength/stiffness, larger creep and shrinkage, poorer durability) compared to natural aggregate concrete (NAC). A possible approach of using RAC in structural compressive members is to confine RAC in a fiber reinforced polymer (FRP) jacket as the compressive performance of concrete can be significantly improved through confinement. To understand the compressive behavior FRP-confined RAC, this paper presents the results of a large number of compression tests on CFRP-confined RAC cylinders whose major test parameters are the replacement ratio of coarse aggregate and the CFRP jacket stiffness. The test results show that the replacement ratio does not have a significant effect on the FRP confinement effectiveness. The compressive behavior of FRP-confined RAC is similar to that of FRP-confined NAC and can be reasonably approximated by existing stress-strain models for FRP-confined NAC. (c) 2016 Elsevier Ltd. All rights reserved.
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