简介：随着资源的日渐匮乏,如何提高资源的循环利用率,保持建筑材料资源的可持续利用,加强建筑材料的保护已成为了社会各界普遍关心的问题。因此,针对于该命题,本文从实践经验出发,结合相关理论,为促进我国建筑材料的保护和再利用技术以及策略的发展提出一些意见。

简介：Currently,thedesignpracticeofhighwaybridgesaroundtheworldaremovingtowardslimitstatesdesign,areliability-baseddesignprocedure.CanadianHighwayBridgeDesignCode(CHBDC)isthefirstdesigncodeentirelydevelopedbasedonlimitstatesdesignphilosophy,includingfoundationsandFRPcomponents.However,reliabilityofastructuredecreasesinserviceduetoenvironmentalattacksandmaterialdeteriorationsuchasfatigue,corrosionandmanyotherreasons.Therefore,thestructureshouldbeinspectedperiodically,andthereliabilityofthestructureshouldbeevaluatedaccordingtoitsageandfielddata.Ifitsreliabilityisreducedtoacertainlevel,arepairshouldbescheduledaswellassomepreventivemaintenancemeasuresshouldbeimplementedtopreventfurtherdeterioration.Recently,manyresearchworkshavebeenconductedtoinvestigatereliability-deteriorationmechanismsforeachtypeofinfrastructureanditscomponents,optimizetheinspectionandmaintenancestrategy,predictremainingservicelife,estimateitslifecyclecost.Thispaperisfocusedonthestudyofreliability-deteriorationmechanismsofslabonsteelgirderbridgesduetofatigueandcorrosionofsteelgirdersaswellascorrosionofreinforcementinthedeckslab.Exampleswillalsobegiventoillustratetheproposedlifecyclemanagementstrategyforcompositeslabonsteelgirderbridges.

简介：本文从全过程分析的角度探讨，分析了张力膜结构的形状判定，荷载态分析及载剪分析三方面的内容及其相互关系，提出了全过程，一体化集成分析的思想，并就全过程分析中各个技术关键的实施策略进行了研究。