简介:Theobjectiveofthisworkistoanalysefatiguereliabilityofdeckstructuressubjectedtocorrelatedcrackgrowth.Thestressintensityfactorsofthecorrelatedcracksareobtainedbyfiniteelementanalysisandbasedonwhichthegeometrycorrectionfunctionsarederived.TheMonteCarlosimulationsareappliedtopredictthestatisticaldescriptorsofcorrelatedcracksbasedontheParis-Erdoganequation.Aprobabilisticmodelofcrackgrowthasafunctionoftimeisusedtoanalysethefatiguereliabilityofdeckstructuresaccountingforthecrackpropagationcorrelation.Adeckstructureismodelledasaseriessystemofstiffenedpanels,whereastiffenedpanelisregardedasaparallelsystemcomposedofplatesandarelongitudinal.Ithasbeenproventhatthemethoddevelopedherecanbeconvenientlyappliedtoperformthefatiguereliabilityassessmentofstructuressubjectedtocorrelatedcrackgrowth.
简介:本文介绍揭阳市榕华大桥主桥上部、下部结构设计特点及主桥的经济技术指标。
简介:从铜川向北经金锁关往东北行40余公里。便到了玉华山脚下。已是深秋时节,天空中飘着微微细雨,沿曲折的小径前行,黄金的落叶铺在稍嫌泥泞的小路上,空气中弥漫着淡淡的云雾,将玉华山笼罩于一片迷蒙之中,却丝毫也遮掩不住玉华那成熟而美丽的秋之韵。举目远眺,迎面而来的是点缀于悠然耸立着的绿树中的片片红叶,那叶经过阳光雨露的滋润,更显得饱满而俊俏,似火般燃烧着热情的期待,如霞样缀满了山的各个角落,仿佛正怀了一颗火热的心等待我们去走近她,赏识她。