High-ductility prefabricated vibration-resistant concrete pile

Abstract

The invention provides a high-ductility prefabricated vibration-resistant concrete pile. The concrete pile comprises concrete, a steel reinforcement cage, end plates and pile hoops, and the steel reinforcement cage is arranged inside the concrete; the end plates are arranged at the two ends of the steel reinforcement cage; each pile hoop is arranged outside the corresponding end plate; the steel reinforcement cage comprises prestressed steel reinforcements, a stirrup and high-ductility non-prestressed steel reinforcements, and the steel reinforcement cage is formed by roll-welding the prestressed steel reinforcements and the spiral stirrup; the high-ductility non-prestressed steel reinforcements are longitudinally fixed to the stirrup. By means of the high-ductility prefabricated vibration-resistant concrete pile, the defects that existing prefabricated concrete piles are poor in bending performance and ductility, the failure is brittle failure, ductility is poor, cracks appearing in the prefabricated concrete piles spread rapidly, steel reinforcements in a tensile area are yielded and tightened quickly till fracture, and the difference between ultimate bending moment and the cracking bending moment is not large are overcome, ductility of a tube pile is improved well, it is helpful to improve vibration resistance, maintenance cost can be lowered, the service life is prolonged, and the high-ductility prefabricated vibration-resistant concrete pile has the advantages of being simple in process, high in cost performance, wide in application scope and the like.

Description

technical field [0001] The invention relates to pile foundation materials in underground foundations, in particular to a high ductility prefabricated anti-seismic concrete pile. Background technique [0002] Foreign countries have carried out in-depth research on the seismic performance of PHC pipe piles, and studied its various improvement measures. The improvement measures mainly include: pipe pile core filling, stirrup reinforcement (stirrup ratio), high-strength stirrup, adding non-prestressed tendons, using high elongation prestressed tendons, and pasting glass fibers in the plastic hinge area, etc. Among them, stirrup densification and non-prestressed tendons have been studied the most, and their improvement effects are also the most obvious. [0003] At present, domestic research on the seismic performance of PHC pipe piles is almost blank, and most of the research is static tests or field tests. Moreover, the pipe pile production technology of domestic manufacturer...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a high ductility prefabricated anti-seismic concrete pile to solve the problems of poor bending resistance, brittle failure, poor ductility and poor overall performance of existing prefabricated concrete pipe piles

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