科研之友
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摘要
Concrete-filled steel tubular (CFST) columns have been widely used in civil engineering structures due to their good compressive mechanical properties and construction convenience. However, their corrosion resistance and fire resistance are poor, and the steel tube is prone to outward local buckling under axial compression. ECC (engineered cementitious compositeengineered cementitious composite) is a fiber-reinforced cement-based composite with the characteristics of multi-cracking and strain hardening (after cracking), which has the advantages of good ductility, high toughness and excellent durability. Therefore, strengthening the CFST column with textile-reinforced ECC (TR-ECC) layer can overcome the above shortcomings, and enhance the durability of CFST. Based on this concept, a series of studies have been carried out in the authors' research group on the compression behavior of CFST strengthened by the TR-ECC layer. In this paper the test results of the axial compression behavior of CFST strengthened by TR-ECC layer at ambient temperature are presented, while the influence of higher temperature on the compressive mechanical properties of CFST strengthened by TRECC layer has been also studied, and the related research results will be introduced in another paper. ? 2022, Editorial Office of Journal of Xi'an University of Architecture & Technology. All right reserved.
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