钢管再生混凝土柱受力性能研究进展

Research Progress on Mechanical Properties of Recycled Concrete Filled in Steel Tubular Columns

对再生骨料取代率、长细比、偏心距、钢管壁厚对钢管再生混凝土柱受力性能的影响做了归纳总结。长细比和偏心距对钢管再生混凝土的极限承载力影响较为显著,长细比和偏心距增加,试件的极限承载力呈下降趋势。再生骨料取代率的改变对钢管再生混凝土柱的应变影响很大,随着再生骨料取代率的提高,试件的峰值应变呈增长趋势。钢管再生混凝土柱的刚度和耗能特性同样与再生骨料取代率,长细比等性质关系密切。归纳总结了目前研究存在的一些问题以及对未来钢管再生混凝土柱的研究方向进行了一些初步的设想。

In this paper, the influence of recycled aggregate replacement ratio, slenderness ratio, eccentricity, steel tube wall thickness on the mechanical properties of recycled concrete columns is summarized. The influence of slenderness ratio and eccentricity on the ultimate bearing capacity of recycled concrete filled steel tube is obvious, and the ultimate bearing capacity of the specimen decreases with the increase of slenderness ratio and eccentricity. The change of replacement ratio of recycled aggregate has a great influence on the strain of concrete filled steel tubular column. With the increase of recycled aggregate replacement ratio, the peak strain of the specimen increases. The stiffness and energy dissipation characteristics of recycled concrete columns are closely related to the replacement ratio of recycled aggregate, slenderness ratio and so on. At the end of the paper, some problems existing in the present research are summarized, and some tentative ideas about the research direction of the steel tube recycled concrete columns are presented.