Research on Mechanical Properties and Bearing Capacity of Stainless Steel Tower Base Plates
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摘要: 输电铁塔塔脚部位受盐渍土壤侵蚀、雨水堆积、大气腐蚀等因素的影响,易出现局部腐蚀现象,应用304不锈钢制作塔脚板可有效提升塔脚部位的耐腐蚀性。基于实测的不锈钢应力-应变曲线,应用R-O模型、M-R-O模型、G-R-O模型、Q-R-O模型拟合其本构关系,确定了适用于304不锈钢的本构模型。采用有限元方法对输电铁塔典型的四地脚螺栓塔脚板和八地脚螺栓塔脚板的受力性能进行深入分析,考察了底板厚度、加劲肋厚度和加劲肋高度对承载能力的影响。研究结果表明:不锈钢塔脚板力学性能不低于传统Q355钢塔脚板,底板厚度对承载能力影响最为显著。Abstract: The base of transmission towers is prone to localized corrosion due to factors such as saline soil erosion, rainwater accumulation, and atmospheric corrosion. Using 304 stainless steel for the base plate can effectively enhance the corrosion resistance of the tower base. Based on the measured stress-strain curve of stainless steel, the R-O, M-R-O, G-R-O, and Q-R-O models were used to fit its constitutive relation, and a constitutive model suitable for 304 stainless steel was determined. The finite element method was used to conduct an in-depth analysis of the mechanical properties of typical four-anchor-bolt and eight-anchor-bolt base plates in transmission towers, examining the influence of base plate thickness, stiffener thickness, and stiffener height on the bearing capacity. The research results showed that the mechanical properties of stainless steel base plates was not inferior to that of traditional Q355 steel base plates, and the thickness of the base plate had the most significant effect on the bearing capacity.
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Key words:
- stainless steel /
- tower foot plate /
- finite element analysis /
- effective bearing capacity
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