Residual stress of 460 MPa high strength steel welded i section: Experimental investigation and modeling
Residual stress of 460 MPa high strength steel welded i section: Experimental investigation and modeling
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DOI：
10.1007/s13296-013-4010-1
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发表时间：
2013-12
影响因子：
1.5
通讯作者：
H. Ban;G. Shi;Yu Bai;Yongjiu Shi;Yuanqing Wang
中科院分区：
文献类型：
--
作者：
H. Ban;G. Shi;Yu Bai;Yongjiu Shi;Yuanqing Wang
钢结构构件内部残余应力的可靠估计在钢结构设计和施工中具有重要意义，特别是对于近年来应用越来越多的高强度钢。本文采用分段法对460 MPa级工字钢焊接残余应力进行了试验研究。根据1972组8个不同截面的实测数据，得到了残余压应力和残余拉应力的大小和分布。研究了翼缘与腹板宽厚比、钢板厚度、焊缝形式以及翼缘与腹板的相互作用对节点受力性能的影响。结果发现，压缩残余应力的大小在很大程度上与截面尺寸有关，而没有直接的相关性被发现与焊缝类型和尺寸的拉伸。由于每个单独部件内的应力平衡，因此未发现翼缘和腹板之间的残余应力相互作用。此外，本文还提出了一个分布模型，该模型能较好地描述试验结果，可用于460 MPa级高强钢构件的屈曲性能研究和设计。
A reliable estimation of residual stress within steel sections is important in steel structural design and construction, especially for high strength steel which has been increasingly used in recent years. An experimental investigation was conducted in this paper to quantify the residual stresses in 460 MPa steel welded I sections using sectioning method. The magnitude and distribution of both compressive and tensile residual stresses were obtained based on 1972 sets of original data measured from eight different sections. The effects of width-thickness ratios of the flange and web, steel plate thickness, weld type and interaction of the flange and web were investigated. It was found that the compressive residual stress magnitude was largely related to the sectional dimension, while no direct correlation was found with the weld type and size for tensile ones. No residual stress interaction between the flange and web was identified because of the stress equilibrium within each individual part. In addition, a distribution model was proposed in this paper and well described the experimental results, which can be used to investigate and design the buckling behavior of 460 MPa high strength steel members.