钢管自密实粉煤灰混凝土柱轴压性能试验研究  

Experimental study on axial compression performance of self-compacting fly ash concrete filled steel tube column

作　　者：海然 肖凯[2] 柳明亮 陈祥 惠存 HAI Ran;XIAO Kai;LIU Mingliang;CHEN Xiang;HUI Cun(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;School of Intelligent Construction and Civil Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China;Shaanxi Academy of Building Science Co.,Ltd.,Xi′an 710082,China)

机构地区：[1]河南科技大学材料科学与工程学院,洛阳471023 [2]中原工学院智能建造与建筑工程学院,郑州450007 [3]陕西省建筑科学研究院有限公司,西安710082

出　　处：《建筑结构》2025年第3期52-56,共5页Building Structure

基　　金：国家自然科学基金(52208226);河南省重点研发专项(241111322000)。

摘　　要：为探究混凝土强度等级、内部构造形式等参数对钢管自密实粉煤灰混凝土柱轴压性能的影响,对8根钢管自密实粉煤灰混凝土柱进行了轴压试验,观察加载过程中各试件的受力情况、变形发展和破坏模式,分析各试件的荷载-位移曲线、荷载-应变曲线、特征荷载与特征位移、延性和刚度退化等变化规律。结果表明:各试件均为典型的剪切破坏模式,其剪切变形主要集中在试件的中部和上部,具体表现为中上部横向鼓曲变形;内部构造在一定程度上减缓了试件破坏,而混凝土强度对破坏模式影响不大;提高混凝土强度或设置内部构造措施可提升试件的承载性能和延性。In order to explore the effects of concrete strength grade,internal structure form and other parameters on the axial compression performance of self-compacting fly ash concrete filled steel tube columns,axial compression tests were carried out on 8 steel tube self-compacting fly ash concrete filled steel tube columns.The change law of stress conditions,deformation development and failure modes of each specimen during loading were observed.The load-displacement curve,load-strain curve,characteristic load and characteristic displacement,ductility and stiffness degradation of each specimen were analyzed.The results show that all the specimens are typical shear failure mode,and the shear deformation is mainly concentrated in the middle and upper part of the specimen,which is manifested as transverse bulging deformation in the middle and upper part.The internal structure can slow down the failure of specimens,while the concrete strength has little effect on the failure mode.The load bearing property and ductility of specimens can be improved by increasing the strength of concrete or installing internal structural measures.

关 键 词：钢管自密实粉煤灰混凝土柱 轴压性能 受力过程 破坏模式 刚度退化 

分 类 号：TU398[建筑科学—结构工程]