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柔性基层沥青路面动力响应试槽试验

DOI: 10.3969/j.issn.1674-0696.2012.04.10, PP. 777-780

Keywords: 沥青路面,柔性基层,动力响应,应变片,asphaltpavement,flexiblebase,dynamicresponse,straingauge

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Abstract:

:?根据室内试槽柔性基层沥青路面结构的重复加载试验,总结了路用电阻应变片的选择依据和黏贴工艺,对比分析了压路机压实方式对应变片存活率的影响;利用惠斯登电桥电路测试了柔性基层沥青路面的动力响应,并与数值计算进行对比。研究表明:路用电阻应变片栅长应大于80mm,并与集料的最大公称粒径相关;电阻应变片在压路机静压的方式下有较理想的存活率,而在强振作用下却极难存活;在移动荷载作用下沥青面层底部横向应变交替出现拉、压应变,其最大值比层状弹性体系模型计算值小。

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