高强度U肋加劲钢板残余应力测试及模拟分析

发布时间：2018-01-04 04:38

本文关键词：高强度U肋加劲钢板残余应力测试及模拟分析　出处：《同济大学学报(自然科学版)》2016年11期 　论文类型：期刊论文

【摘要】：为研究Q420级高强度U肋加劲钢板纵向焊接残余应力分布特点及影响因素,利用切割法对U肋加劲钢板进行了纵向残余应力测试,通过三维实体热弹塑性有限元模型和单元生死技术模拟了焊缝填充和焊接过程,比较分析了高强度钢和普通强度钢的残余应力分布特点,探讨了母板厚度及U肋的厚度、间距、宽度、高度对加劲板焊接残余应力的影响.研究结果表明,U肋两侧的焊接先后顺序并不影响加劲板的残余应力分布;非焊接区域残余压应力峰值和分布特点与板件材料的屈服强度基本不相关;板件厚度、U肋顶宽和U肋高度是影响高强度U肋加劲钢板焊接残余应力的主要因素.
[Abstract]:For the study of Q420 grade high strength U rib stiffened plate longitudinal welding residual stress distribution characteristics and the influence of U, using the cutting method of stiffened plate longitudinal residual stress testing, through three-dimensional thermal elastic-plastic finite element model and simulated weld element birth and death technology and welding process, a comparative analysis of the residual high the strength of steel and ordinary steel strength and the stress distribution features of the motherboard thickness and U rib thickness, width, height of spacing, effects of welding residual stress of stiffened plate. The results show that the U rib on both sides of the welding sequence does not affect the residual stress distribution of ring stiffened plate; non welding residual area should the yield strength and peak force distribution characteristics and the plate material is not relevant; plate thickness, rib width and rib top U U height is high strength U stiffened steel plate welding residual stress of the main factors.

【作者单位】：同济大学桥梁工程系;新南威尔士大学基础设施与安全工程研究中心;中交公路规划设计院有限公司;
【基金】：交通运输部建设科技项目(2011318494890)
【分类号】：TG404
【正文快照】： 3.中交公路规划设计院有限公司,北京100010)高强度钢材较普通强度钢材在力学性能方面具有显著优点,并被越来越多地应用在桥梁工程领域[1-2].U肋加劲钢板是桥梁结构中承压的主要受力构件,板件纵向焊接残余应力能够对加劲钢板受压构件的整体和局部稳定性产生重要影响.U肋加劲钢

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