基于可靠度理论的腐朽木梁剩余寿命评估  

Reliability-based Assessment of Service Life of Timber Beam Under Natural Decay

作　　者：王雪亮[1] 郭君慧[2] 王小丽[3] 谭柱[3] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点试验室,武汉430070 [2]武汉理工大学化学化工与生命科学学院,武汉430070 [3]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《武汉理工大学学报》2015年第7期74-77,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51208399)

摘　　要：基于木构件腐朽深度的经验公式及自然环境下腐朽构件抗弯强度的退化模型,假定腐朽深度及初始抗弯强度服从正态分布,建立了腐朽木梁的随机时变抗力模型;提出了基于可靠度理论的历史建筑的腐朽木梁的剩余寿命评估方法,最后通过对某历史建筑的腐朽木梁的评估验证了该方法的可行性。Based on the domestic empirical formula of decay depth and degradation model of bending strength of decayed wood component assuming that the stochastic variable,decay depth,is normal distribution,the stochastic time-varying model of the moment resistance of the timber beam under decay fungi is deduced which is the function of the stochastic variables,decay depth and initial moment resistance.Then the reliability-based assessment method is proposed to predict the residual service life of the timber beam in a historic timber structure.Finally a decayed timber beam is assessed to verify this method.

关 键 词：腐朽木梁 抗弯强度退化 可靠度 随机时变抗力模型 剩余寿命评估 

分 类 号：TU366.2[建筑科学—结构工程]