【摘要】 本文在文献［１］的基础上，进一步运用现代断裂力学和结构系统可靠性分析原理，导出了一种处理多种交变应力引起结构系统疲劳失效的计算方法，提出了一种考虑构件腐蚀、在交变应力及地震力作用下结构系统安全寿命的评估方法，并开发出相应的计算机软件，对淮河跨越管桥结构系统进行评估，验证了该方法的有效性和可靠性。更多还原

【Abstract】 In this paper, based on reference and the principle of modern fracture mechanics and reliability anlaysis of structure system, we deduce a computing method which solves the fatigue failure of structure system induced by the low alternative stesses, and provide an assessment of structure system’s safety life under the consideration of’structure etching and the actions of the alternative stresses and earthquake forces. By using this method, we assess the structure system of pipeline bridge over Huai river, and test its effectivity and reliability.更多还原