包裹方式及条带间距对BFRP-PVC管自密实再生混凝土短柱力学性能的影响研究

EXPERIMENTAL STUDY OF THE INFLUENCE OF COVERED WAYS AND STRIP SPACE ON THE MECHANICS CHARACTER OF THE BFRP-PVC CONFINED SELF-COMPACTING RECYCLED CONCRETE SHORT-COLUMN

通过对27根不同包裹方式和条带间距的BFRP-PVC管自密实再生混凝土短柱进行轴压试验,研究纤维布包裹方式和条带间距对BFRP-PVC管试件柱的承载力、变形能力以及破坏形态的影响。试验结果表明,在纤维布粘贴总层数相同的情况下,里层全裹试件柱的强度提高率和变形能力明显优于全部条带间隔粘贴的试件柱,其中Z1BS系列柱的强度提高率比Z2BS系列柱的强度提高率更高;条带环箍间距对于试件的强度提高率有一定的影响,影响程度与里层纤维布包裹方式有关;就变形能力而言,BFRP-PVC管试件短柱优于PVC管混凝土短柱,里层全裹纤维布短柱优于全部条带间隔方式包裹的短柱,Z2BS系列试件优于Z1BS系列试件。

A total of 27 BFRP-PVC confined self-compacting recycled concrete short-columns with different wrapped ways and strip interval were tested under axial compression to study the influence of the wrapped ways,strip intervals and failure patterns on carrying capacity and deformation capacity of the BFRP-PVC specimen. The experimental results show that when the whole layers is same,the strength improvement rate and deformation capacity of specimen entirely wrapped at the inner layer along the PVC tube were obviously better than that of specimen wrapped with strip interval way along the PVC tube,and the strength improvement rate of Z1 BS series of specimens is better than that of Z2 BS series of specimens. The outside strip interval distance has certain influence on the carrying capacity,and the influence degree is related with the wrapped ways. The deformation capacity of BFRP-PVC confined self-compacting recycled concrete short-column is obviously better than PVC confined self-compacting recycled concrete short-column,and the deformation capacity of short-column entirely wrapped at the inner layer is better than that of short-column wrapped with entirely strip interval way. Besides,the deformation capacity of Z2 BS series of specimens is better than that of Z1 BS series of specimens.