摘要
国产701铝合金是一种新型铝合金材料,相较于传统的6061-T6铝合金,其强度更高,也具有较好的延性,在塔架中有着广泛的应用前景。首先完成了24根国产701铝合金L形截面轴压构件承载力试验,得到了构件的极限承载力和破坏模式。随后建立了数值分析模型,并通过试验验证了数值模型的正确性。基于所建立的数值模型,完成了大量数值分析,并得到了长细比、截面规格、初始弯曲等因素对构件承载力的影响规律。最后,将试验实测稳定系数和现有规范公式计算得到的稳定系数进行比较,对比结果表明,国产701铝合金L形轴压构件的整体稳定承载力可以采用我国《铝合金结构设计规范》(GB 50429—2007)中的公式进行计算。
The domestic 701 aluminum alloy is a new aluminum alloy with excellent mechanical performance.Compared with traditional 6061-T6 aluminum alloy,701 aluminum alloy has a higher strength and better ductility.Therefore,the 701 aluminum alloy has a broad application prospect in towers.Firstly,in this paper,the tests are completed on 24 columns made of 701 aluminum alloys with L-section,and the ultimate axial compression bearing capacity and failure modes of the specimens are obtained.Then,numerical models are built and verified by using experimental results.Based on the numerical models,a large number of FE models are analyzed considering the parameters such as slenderness ratio,sectional dimension and initial curvature.Finally,the stability coefficients obtained from the numerical analysis are compared with those calculated using existing standards.The comparison results show that the overall stability bearing capacity of the 701 aluminum alloys with L-section can be calculated by the formula recommended in the Code for Design of Aluminum Structures(GB 50429—2007).
作者
胡晓光
程永锋
陈宣宇
郭小农
韩军科
邢海军
HU Xiaoguang;CHENG Yongfeng;CHEN Xuanyu;GUO Xiaonong;HAN Junke;XING Haijun(China Electric Power Research Institute,Beijing 100055,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《建筑钢结构进展》
CSCD
北大核心
2021年第11期63-71,共9页
Progress in Steel Building Structures
基金
国家电网公司科技项目(GCB17201900224)。
关键词
国产701铝合金
L形轴压构件
弯曲失稳
弯扭失稳
数值分析
整体稳定
domestic 701 aluminum alloy
L-shaped member under axial compression
bending instability
flexural-torsional instability
numerical simulation
overall stability