哑铃形不锈钢管海砂混凝土长柱轴压承载力分析  

Study on the axial bearing capacity of sea sand concrete filled stainless steel tube long columns with dumbbell-shaped section

作　　者：彭桂瀚[1] 罗有鹏 袁辉辉[1] 黄国兴 康红梅 PENG Guihang;LUO Youpeng;YUAN Huihui;HUANG Guoxing;KANG Hongmei(College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China;Fuzhou City Construction Design and Research Institute Co.,Ltd.,Fuzhou,Fujian 350001,China)

机构地区：[1]福州大学土木工程学院,福建福州350108 [2]福州城建设计研究院有限公司,福建福州350001

出　　处：《福州大学学报（自然科学版）》2022年第2期222-227,共6页Journal of Fuzhou University(Natural Science Edition)

基　　金：国家自然科学基金面上资助项目(51978169);福州大学贵重仪器设备开放测试基金资助项目(2021T037)。

摘　　要：为研究哑铃型不锈钢管海砂混凝土长柱轴压性能,以郑州黄河二桥为工程背景,开展该类长柱结构轴压试验研究;通过有限元参数分析,提出该类结构承载力计算简式.研究结果表明:轴向荷载作用下,哑铃形不锈钢管海砂混凝土长柱的破坏模态表现为侧向挠度发展较大的整体失稳破坏;现有相关规范高估了试验构件的稳定系数;提出的稳定系数计算简式可较为准确预测轴压荷载作用下哑铃形不锈钢管海砂混凝土长柱的稳定承载力.In order to study the axial compression performance of the sea sand concrete filled stainless steel tube long column with dumbbell-shaped section,with the Zhengzhou Yellow River Second Bridge as the engineering background,the axial compression test was carried out,and finally put forward the calculation formula of the stability coefficient of this kind of structure based on the parametric finite element analysis.The research results showed that,under the action of axial load,the failure mode of the long column was shown as an overall instability failure with a larger lateral deflection;the existing relevant specifications overestimated the stability coefficient of the test member;the proposed calculation formula of the stability factor can more accurately predict the axial bearing capacity of the sea sand concrete filled stainless steel tube long column with dumbbell-shaped section under the axial compression load.

关 键 词：不锈钢管海砂混凝土 哑铃形 轴压承载力 有限元模拟 简化计算公式 

分 类 号：TU398[建筑科学—结构工程]