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简介：Automobileaccidentsareasfamiliarasthecommoncoldbutfarmoredeadly.

简介：英美国家交通十分发达，需要去某地，坐哪路车，相当便利。可以问路人、警察．也可以打电话询问。在国外．尽管候车的人不多，但他们总是会自赏排队等车、上车。英美人遵循“Firstcome，firstserved．”的行为准则。如果有人不守秩序，会遭到人们的蔑视。

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简介：Indesignphases,expansionjointsarerequiredtohavemovementcapacity,bearingcapacityforstaticanddynamicloading,watertight,lownoiseemissionandtrafficsafety.Onthebasisofthefactthatfailureduetodynamicloadingisthemainreasonfortheobserveddamages,attentionisfocusedonthebearingcapacityfordynamicloadinggovernedbyimpact,becauseitdiffersfromthestaticloading.Inthisstudy,fromtheviewpointofdurability,experimentalstudiesfordynamicbehaviorwereconductedforaluminiumalloyexpansionjointswithperforateddowels.Thevalidityoftheperforateddowelsagainsttrafficimpactloadingwasconfirmedbybothexperimentalandnumericalstudies.

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