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ID:32445854
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页数:7页
时间:2019-02-04
《连续配筋混凝土路面横向开裂的敏感性分析》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、维普资讯http://www.cqvip.com第5卷第2期铁道科学与工程学报Vo1.5NO.22008年4月JOURNALOFRAllWAYSCIENCEANDENGINEERINGADr.20o8连续配筋混凝土路面横向开裂的敏感性分析查旭东(长沙理工大学公路工程学院,湖南长沙410076)摘要:结合湖南省耒宜高速公路连续配筋混凝土路面(CRCP)结构,通过选取影响CRCP横向开裂的l3个主要因素(包括板厚,混凝土的弹性模量、温缩系数、干缩应变、抗压强度和徐变系数,钢筋的弹性模量、温缩系数、直径和间距,以及地基摩阻系数、钢筋粘结强度和温降)的5种取值水平,采用考虑钢筋与混凝土之间粘结滑移及
2、面板与基层之间摩阻滑移的交界面非线性性质和徐变作用的一维非线性分析法,由迭代计算同时得到CRCP的平均裂缝间距、平均裂缝宽度和最大钢筋应力,zA.~6按相对比较的方法对各参数影响CRCP横向开裂的敏感性进行定量和定性分析。结果表明,控制CRCP横向开裂的主要措施有:选取适宜的钢筋等级、品种与混凝土标号,选取合理的钢筋间距和直径的配筋方式,并控制混凝土和钢筋的收缩性质。关键词:连续配筋混凝土路面;横向开裂;敏感性;裂缝间距;裂缝宽度;钢筋应力中图分类号:U416.216.2文献标识码:A文章编号:1672~7029(2oo8)02—0O64—07Sensitivityanalysisoftra
3、nsversecrackingforcontinuouslyreinforcedconcretepavementZHAXu—dong(SchoolofHighwayEngineering,ChangshaUniversityofScience&Technology,Changsha410076,China)Abstract:5kindsofvaluelevelfor13mmnfactorsinfluencingCRCPtransversecrackingwereselectedfromthestruc—tureofcontinuouslyreinforceconcretepavement(C
4、RCP)inLei—Yi(LeiyangtoYizhang)ExpresswayofHunanProvince.Thefactorsareasfollows:slabdepth,elasticmodulus,temperatureshrinkagecoefficient,dryingshrinkagestrain,compressionstrengthandcreepcoefficientofconcrete,elasticmodulus,temperatureshrinkagecoeficient,di—ameterandspacingoflongitudinalreinforcement
5、,basefrictioncoefficient,reinforcementbondstrengthandtemperaturedifferences.Theaveragecrackspacing,theaveragecrackwidthandthemaximumreinforcementstressweresimuhane—ouslycalculatedwiththeiterativealgorithmsaccordingtotheone——dimensionnonlinearanalyzingmethodconsideredthecreepactionandthenonlinearbou
6、ndaryproperties,includedinthebond—slipbetwenreinforcementandconcreteandthefriction—slipbetwenslat)andbase.SothesensitivitiesofCRCPtransversecrackinginfluencedbyeachfac—torwereanalyzedinthequantitativeandqualitativewaywiththerelativecomparingmethod.TheresultsshowthatthemainmeasuresincontrollingtheCR
7、CPtransversecrackingarcincludedinselectingthesuitablegradeandtypeofre—inforcementandconcretegrade,thereasonablereinforcedwayforspacinganddiameterofreinforcement,andcontrol—lingtheshrinkagepropertiesofconcre
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