摘要
为研究加肋L形钢管再生混凝土短柱的轴压性能,运用ABAQUS建立15根钢管柱进行模拟,分析了试件的荷载-纵向应变曲线,研究了再生骨料取代率、有无肋、截面长宽比D/B、宽厚比B/t、再生混凝土强度、加肋形式等对试件轴压性能的影响。研究结果表明:宽厚比B/t、再生混凝土强度、截面长宽比D/B的变化对试件轴压性能影响较大,再生骨料取代率对试件轴压性能影响较小,加肋在一定程度上提高试件的轴压极限承载力。再生混凝土强度、截面长宽比D/B、宽厚比B/t对试件的初始轴压刚度影响较大,且随着截面长宽比的增大、再生混凝土强度的提高、钢管宽厚比的减小,其初始轴压刚度都明显增大,15根L形再生混凝土短柱的轴压刚度曲线变化趋势基本一致,都是在屈服前减小,在达到屈服后,刚度值有缓慢增加的趋势。
In order to study the axial compression performance of the ribbed L-shaped steel tube recycled concrete short column,15 steel tube columns were established for simulation with ABAQUS.The load-longitudinal strain curves of the specimens were analyzed.Simultaneously,many influence factors were studied,including the replacement rate of recycled aggregate,the presence or absence of ribs,the section length-width ratio D/B,the width-thickness ratio B/t,the strength of recycled concrete,and the rib form.The research results show that the changes of width-to-thickness ratio B/t,the strength of recycled concrete,and the section lengthto-width ratio D/B have a great influence on the axial compression performance of the tubes,while the replacement rate of recycled aggregate has little effect.In addtion,the addition of ribs can improve the axial compressive ultimate capacity of specimens to a certain extent.The strength of recycled concrete,section length-width ratio D/B,and width-thickness ratio B/t have a great influence on the initial axial compression stiffness of the specimen.With the increased section length to width ratio,strengthened recycled concrete,and reduced steel tube width to thickness ratio,the initial axial compression stiffness increases significantly.The changes of initial axial compressive stiffness of the 15 L-shaped recycled concrete short columns are almost the same,demonstrating a tendency of declining before yielding,and then growing slowly after reaching yield.
作者
胡尔洪
黄玲
曹小芳
熊强
HU Er-hong;HUANG Ling;CAO Xiao-fang;XIONG Qiang(School of Civil and Architectural Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《南昌航空大学学报（自然科学版）》
CAS
2023年第1期55-67,共13页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
国家自然科学基金(51408292)
南昌航空大学研究生创新专项(YC2021-113)。
关键词
加肋L形钢管
再生混凝土
短柱
轴压性能
ribbed L tube
recycled concrete
short column
axial compression performance
作者简介
通讯作者:黄玲(1971-),女,硕士,副教授。主要研究方向:结构工程。
