Abstract
The mechanical property of steel reinforced PP ECC columns under reverse cyclic load is investigated and results are presented in this paper. The influence of reinforcement ratio, curing age and volume fraction of PP fiber on load bearing capacity, energy dissipation and stiffness degradation is investigated. The results highlighted the positive contribution of PP ECC to enhance strength and energy dissipation capacity which is important to evaluate the performance of structures subjected to reverse cyclic loads. According to the experimental study on mechanical behavior of steel reinforced PP ECC columns under reverse cyclic loading, the formula of model parameters related to reinforcement ratio are proposed，it is founded that the restoring force model established is of a certain degree of adaptability.
Highlights
Because of the high cost of Engineering cement-based composites (PVA ECC), it is not conducive to marketization in the research of PVA ECC at present
produce super-strength and toughness concrete (PP ECC) overcomes the main shortcomings of traditional concrete, solves many problems encountered in the application of concrete in engineering circles, and it is an ideal substitute material for concrete
Because of PP ECC is different from concrete and has strong deformation capacity, it still bears loads after cracking
Summary
Because of the high cost of Engineering cement-based composites (PVA ECC), it is not conducive to marketization in the research of PVA ECC at present. Modified polypropylene (PP) fibers and optimized mix ratio were used to produce super-strength and toughness concrete (PP ECC) in this study. The cost of PP ECC is much lower than that of traditional ECC, and it has good engineering prospects. PP ECC overcomes the main shortcomings of traditional concrete, solves many problems encountered in the application of concrete in engineering circles, and it is an ideal substitute material for concrete. According to the excellent performance of PP ECC, it is possible to use PP ECC to replace ordinary concrete materials and reinforcement to work together. It is necessary to conduct in-depth study on this material structure, especially its seismic performance
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