军用桥梁疲劳可靠性分析中的荷载效应  

Load Effects for Fatigue Reliability Analysis of Military Bridge

作　　者：胡业平[1] 屠义强[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2004年第5期39-41,共3页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：通过对军用桥梁荷载的统计分析 ,利用雨流法对军用桥梁应力幅谱Δσi- ni 进行模拟计算 ,根据线性累积损伤准则 ,推导出用于军用桥梁疲劳可靠性分析的等效应力幅 Δσe的计算公式。定义了便于实际应用的荷载效应比和等效应力换算系数。给出的实例分析表明 ,该方法所得结果是合理的 。Stress range spectrum Δσ_i-n_i can be obtained by statistical analysis of military bridge load and simulation calculating based on rainflow cycle counting method. According to linear accumulative damage criteria, the equation for equivalent stress range for fatigue reliability analysis of military bridge is presented. Moreover the load effect ratio and conversion coefficient of equivalent stress is defined for practical application. The results show that such method is reasonable and worthy of using in fatigue reliability analysis.

关 键 词：军用桥梁 疲劳可靠性 荷载效应 等效应力幅 

分 类 号：U662[交通运输工程—船舶及航道工程]