大跨桥梁风致抖振疲劳可靠度近似分析及寿命估算  

WIND-INDUCED BUFFETING FATIGUE RELIABILITY ANALYSIS AND LIFE ESTIMATION OF LONG-SPAN BRIDGES

作　　者：陈艾荣[1] 陈华婷[1] 项海帆[1] 

机构地区：[1]同济大学

出　　处：《土木工程学报》1999年第3期28-33,共6页China Civil Engineering Journal

基　　金：国家自然科学基金!编号59895410

摘　　要：论述了大跨桥梁风致抖振疲劳分析及寿命估算方法。按寿命服从Ｗｅｉｂｕｌｌ分布假定，确定桥梁结 构抖振疲劳可靠度。根据桥梁结构疲劳目标可靠度，给出了简单的寿命计算公式。以虎门悬索桥为工程算例表 明，本文所述方法较之其它桥梁抖振疲劳分析方法更加简单明了，便于实用。The method of fatigue analysis and life estimation of wind-induced buffeting of long-span bridges is developed by assuming the life is in accord with the Weibull Distribution based on the theory of reliability.The fatigue reliability of bridges based on the fatigue objective reliability and formulas for fatigue life estimation are presented.Taking Humen Suspension Bridge as a numerical example, the results calculated by the formulas given in the paper are also compared with those obtaind from both the Normandy Bridge Method and the Shiraishi-Matsumoto Method.The analysis indicates that the reliability method for wind-induced buffeting fatigue analysis is relatively practical and simple.

关 键 词：大跨度桥梁 风致振动 抖振 疲劳分析 寿命估算 

分 类 号：U448.131[建筑科学—桥梁与隧道工程]