摘要
为研究焰切边焊接π形截面钢构件残余应力分布形式及大小,采用分割法对5个不同尺寸的Q345Bπ形截面构件进行试验研究.通过测得的截面各板件残余应力,分析了板件宽厚比对残余应力分布的影响及各板件残余应力的自平衡性.研究结果表明:π形截面构件翼缘、腹板残余压应力与板件宽厚比有直接关系;焊缝附近残余拉应力与板件厚度有关,与板件宽厚比相关性不明显;π形截面3块板件的残余应力分别满足自平衡性.提出了适用于不同尺寸的π形截面构件残余应力分布模型及计算公式,可为π形截面构件的进一步研究与应用提供参考依据.
The residual stresses of5specimens were measured by the sectioning method to investigate the residual stress distribution in Q345B steel welded flame-cutπ-shaped sections.The effects of the plate width-thickness ratio and interaction among component plates were clarified by measuring the residual stress values of each plate.The results indicate that the compressive residual stress in flange and web correlates with the plate width-thickness ratio.Moreover,the residual stress near the welding is related to the plate thickness but not obvious with the plate width-thickness ratio.The residual stress self-equilibrating within each component plate is satisfied.Finally,a residual stress distribution model and a calculation formulate for predicting the residual stress within weldedπ-shaped sections with different dimensions are proposed,it provides a valuable reference for further study and application ofπ-shaped section steel structures.
作者
舒赣平
陈尧
张敏
袁雪芬
蒋露
Shu Ganping;Chen Yao;Zhang Min;Yuan Xuefen;Jiang Lu(School of Civil Engineering, Southeast University, Nanjing 210096 ,China;Tus-Design Group Co., Ltd., Suzhou 215021, China)
出处
《东南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2017年第3期559-564,共6页
Journal of Southeast University:Natural Science Edition
基金
中央高校基本科研业务费专项资金资助
江苏省普通高校研究生科研创新计划资助项目(KYLX16_0245)
关键词
π形截面
残佘应力
自平衡性
分布模型
π-shaped section
residual stress
self-equilibrating
distribution model