聚合物改性水泥混凝土復(fù)合梁的力學(xué)性能研究.pdf

1、重慶交通大學(xué)碩士學(xué)位論文聚合物改性水泥混凝土復(fù)合梁的力學(xué)性能研究姓名：史林申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：易志堅(jiān)20120417ABSTRACTCoincidentdeformationbetweenconcreteandsteelisofgreatimportanceinthereinforcedconcretestructure，howeverlowerultimatestrainofcementconcretema

2、keithardtocoincidethecorporatedeformationbetweenconcreteandsteelitiSmoreenergeticandinnovativetoreplaceconcreteclosingtoreinforcementcoverwithpolymermodifiedcementconcretewithbetterultimatestrainandhigherbendingstrengthT

3、heauthorsuggestsapolymermodifiedcementconcretecompositebeambaseonabovejudgmentsInviewoffundamentalofcoincidentdeformation，thispapercombinesknowledgeoffracturemechanics，summarizesmechanicalpropertiesofcommonbeam，bringsfor

4、wardmentalityofcompositebeamBasingonthismentalitytheauthorderivativesthecalculationformulaofpolymermodifiedcementconcretecompositebeam，experimentallystudythemechanicalpropertiesofpolymermodifiedcementconcreteandpolymermo

5、difiedcementconcretecompositebeam，comparesthetestresultswithcommoncementconcreteandcommonbeam，foundsmodelsofcommonconcretebeamandcompositebeam，calculatesthemodelandmakestheanalysisatthelastSynthesizedtherelevantresults，c

6、onclusionscarlbedrawnasfollows：①Priortocracking，therigidityofcommonbeamisverylarge，therigiditydepressionofpolymermodifiedcementconcretecompositebeamislowerthancommonbeam；Aftercracking，therigidityofcolnlnonbeamhasasensibl

7、efalling，howevertherigidityofpolymermodifiedcementconcretecompositebeamfallsgentlyTherigidityofcommonbeamismarkedlylowerthancompositebeamTheductilityofcompositebeamhasastrikingadvantageovercommonbeam②Comparedwithcommonco

8、ncretebeamthecrackloadofpolymermodifiedcementconcretecompositebeamisincreasedby3125％，theultimateloadofpolymermodifiedcementconcretecompositebeamisincreasedby95％Polymermodifiedcementconcreteofcompositebeampossessexcellent

9、deformationperformance，whichhelpscuttingthestresspeakofsteelatcrackingsections，associatingsteelbetweenthecrackstoworktogethermakingtheaxialstressofsteelbecomemoreuniform，promotingtheperformanceofcompositebeam⑧Comparedwit