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ID:36358193
大小:3.41 MB
页数:117页
时间:2019-05-10
《模网钢管滤水混凝土研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、大连理工大学博士学位论文模网-钢管滤水混凝土研究姓名:迟耀辉申请学位级别:博士专业:材料学(土木)指导教师:王立久20061001迟耀辉:模网.钢管滤水混凝土研究实验研究了添加MgO膨胀剂自应力钢管混凝土短柱轴压下的力学性能.研究分析了初始自应力对其强度和变形能力的影响.试验结果表明由于钢管约束膨胀产生的自应力使核心混凝±三向受压,提高了组合柱的轴压极限承载力;自应力的存在延缓了弹塑性阶段核心混凝土裂缝的扩展,提高了核心混凝土的切线模量:同时使核心混凝土内部更为致密,有效地解决了钢管混凝土脱粘的问题,有力地保证了钢管和核心混凝土的协同工作。关键词:钢管混凝土;模网;过程工程学;电渗;自应力大连
2、理工大学博士学位论文AbstractConcrete·fillcdsteeltubecombinesthebencficialqualitiesofbothsteelandconcrete.namely,highstrength,excellentductility,largeenergyabsorptioncapacityandconvenienceofconstruction.Thereforethe璐eofconcrete.filledstceltubehasbecomewidespread.Bnttherearestillsomedefectsinconcrete-fillcdstee
3、ltube.suchaswasteofresourceandenergy,environmentpollution,need8forextrafircproofmgandrustprevention,highmaintenanceexpense,inconvenienceofbeam·columnconnections,insufficiencyofconfinementeffectowingtotheinterfacedisengaging.Thusafurtherprogressofconcrete-filledsteeltubeisneeded.Thepurposeofthispaper
4、istosolveaboveproblemsbyusingtheprincipleofprocessengineeringofmaterials.Byusingtheprincipleofprocessengineeringtooptimizethe如ccorsofconcreteandchangethe托soureeandenergyflowofconstructiontoenhancetheperformanceofworkabilityofconcrete-filledsteeltubeandt0meettherequirementofsavingtheresoureeandenergy
5、,protectingtheenvironmentandtoconformthestratagemofthesustainabledevelopment,Hi曲watercementratioduringconstructionandlowwatercementratioduringsolidificationarerealizedbyusingelectroosmosistechnologyintheprocessofconcreteconstruction;theproblemssuchaspollution,poorvolumestabilityandhighercostcausingb
6、yadmixturewereresolved;realizedthereuseofresourcebyaddedlargeamountofflyash.Maininfluencingfactorsofelectroosmosissuchashydrationtime,currentintensity,watercementratioandquantityofflyashareanalyzed.Relationshipbetweenfilteringcapacityandtimeisdeduced.Designmethodformixproportions,which锄beusedinreale
7、ngineering。isproposed.Theexperimentalresultsindicatethatelectroosmosistechnologycanfurtherthefilteringvelocitymarkedly,increasethecompressivestrengthofconcretesignificantlyandhasfineeconomicalefficien
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