Seismic performance of pre-stressed high-strength concrete pile reinforced with steel fibre

Seismic performance of pretensioned centrifugal spun concrete piles with steel strands

“…It was concluded that the piles reinforced with non-prestressing tendons and spiral reinforcement properly exhibited good energy dissipation and deformation capacity. Wang et al [12] performed the cyclic loading test of PHC piles and found that the displacement ductility could be improved by reinforcing the pile concrete with the steel fiber. Yang et al [13] investigated the structural behavior of PHC piles under a reverse cyclic bending load, and demonstrated that PHC piles exhibited higher bearing capacity when improvement measures of concrete infilling or configuring deformed bars were adopted.…”

Full-scale experimental study of the seismic performance of pretensioned spun high-strength concrete piles

“…Nagae and Hayashi [2] studied the seismic behavior of PHC piles under lateral cyclic loading and a constant axial load, and pointed out that PHC piles reinforced with longitudinal deformed bars exhibited significant energy dissipation capacity, and the deformation capacity was improved by increasing stirrup ratio but also affected by the axial force and the ratio of the wall thickness to the diameter. Wang et al [12,13] conducted lateral cyclic loading tests on PHC piles without considering axial force, and demonstrated that adding steel fibers in the concrete could improve the ductility and energy dissipation capacity of PHC piles. Yang et al [14,15] carried out experimental and numerical investigation on the seismic performance of PHC piles under lateral cyclic loadings, and the results showed that the concrete infilling could only enhance the bearing capacity of PHC piles, whereas adding non-prestressing deformed rebars could markedly improve the bearing capacity as well as hysteretic performance of PHC piles.…”

“…It was found that the failure modes of piles were mainly tensile rupture of prestressing tendons and crushing of the concrete, and the axial force ratio and the prestressing level of prestressing tendons influenced significantly the seismic behavior of PHC piles. Table 1 summarizes typical design parameters for the test specimens of PHC piles in the literature [2,[12][13][14][15][16]. It can be seen that most of existing studies on the seismic performance of PHC piles have only considered the lateral cyclic loading but ignored the role of the axial force.…”

Seismic behaviour of prestressed high-strength concrete piles under combined axial compression and cyclic horizontal loads

“…In addition, high stirrup ratio increased the cost of the construction. Wang et al (2015Wang et al ( , 2016 also experimentally studied the seismic performance of the PHC piles under horizontal low cyclic loading. It was found that the failure mode of the PHC piles was flexural damage and the ductility of PHC piles was poor.…”