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通过非线性有限元分析(FEA)研究使用U型加固件纵向加劲的面板的极限抗压强度。对112个由各种细长参数的面板和柱以及加固件组成的模型进行分析。模型包括了普通钢材和高强钢的弹塑性应变硬化本构关系。有限元分析中也包括了初始几何缺陷和残余应力。将有限元分析得出的结果与欧洲规范3EN1993-1-5、FHWA-TS-80–205和其他可用公式计算出的强度进行比较。基于分析结果,可得出一个针对使用普通钢材或高强钢(HPS)加劲板系统的新的强度预测公式。结果表明:当柱的长细比较大时,使用欧盟规范3EN1993-1-5和FHWA-TS-80–205可能导致设计过于保守;而采用所提出简化形式的公式可更精确地预测强度,从而得出更经济的设计。
The ultimate compressive strength of panels stiffened longitudinally using U-shaped stiffeners was studied by nonlinear finite element analysis (FEA). 112 models of panels and columns with various slender parameters and stiffeners were analyzed. The model includes the elasto-plastic strain hardening constitutive relation of ordinary steel and high-strength steel. Finite element analysis also includes the initial geometric defects and residual stress. Finite element analysis of the results obtained with the European norms 3EN1993-1-5, FHWA-TS-80-205 and other available formula to calculate the intensity comparison. Based on the results of the analysis, a new strength prediction formula for a stiffener system using normal steel or high strength steel (HPS) can be derived. The results show that when the slenderness of the column is relatively large, the use of the EU norm 3EN1993-1-5 and FHWA-TS-80-205 may lead to the design being too conservative; and using the simplified form proposed, the intensity can be more accurately predicted Draw a more economical design.