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公路桥梁中周期性可变荷载,根据公路桥涵设计的相关规范,文章给出了公路桥梁钢结构抗疲劳应力幅设计方法。根据构造的差异性,以及全寿命设计思想,结合了大量实验所给出的结果,得出了容许应力幅的抗疲劳方程。文章给出的公路钢结构抗疲劳设计方法,实践证明非常可靠,值得同类桥梁抗疲劳设计参考与借鉴。
According to the relevant norms of the design of highway bridges and culverts, the paper presents the design method of anti-fatigue stress amplitude of highway bridges and steel structures. According to the difference of structure and the design idea of full life, combined with the results of a large number of experiments, the fatigue resistance of the allowable stress amplitude is obtained. The anti-fatigue design method of highway steel structure given in this paper is proved to be very reliable and worthy of reference for the anti-fatigue design of similar bridges.