收录:
摘要:
The reliable design of the high-performance column made of fiber reinforced polymer (FRP)-confined engineered cementitious composites (ECC) necessitates a clear understanding of the size effect under axial compression. This paper presents the compressive behaviors of glass FRP (GFRP) and large rupture strain (LRS) polyethylene terephthalate (PET) FRP-confined ECC columns. The specimen size, confinement level, and FRP type were the variables. Five diameters of 100, 200, 300, 400, and 500 mm were designed to cover a wide size range. Results showed that both the compressive strength and ductility of ECC were substantially improved with FRP confinement. Compared with GFRP-confined ECC, PET FRP-confined ECC exhibited higher ductility. The key stresses, namely initial peak stress, post-peak ravine stress, and ultimate stress decreased with increasing spec-imen size. Nevertheless, the specimen size had a marginal influence on the key strains and dilation behavior. After evaluating the existing size-dependent ultimate strength models of FRP-confined concrete, a new expres-sion for predicting the ultimate strength of FRP-confined ECC was introduced, which was shown to fit well with the test results.
关键词:
通讯作者信息:
电子邮件地址:
来源 :
CONSTRUCTION AND BUILDING MATERIALS
ISSN: 0950-0618
年份: 2022
卷: 348
7 . 4
JCR@2022
7 . 4 0 0
JCR@2022
ESI学科: MATERIALS SCIENCE;
ESI高被引阀值:66
JCR分区:1
中科院分区:1
归属院系: