苏州混凝土水泥制品研究院有限公司

头部文案

发布时间:2020-01-06 00:00:00
全国建材科技期刊
全国中文核心期刊
中国科技论文统计源期刊
万方数据-数字化期刊群入网期刊
中国学术期刊(光盘版)全文收录期刊
华东地区优秀科技期刊
江苏省期刊方阵“双效期刊”
中国期刊网全文收录期刊
中国科技期刊数据库全文收录期刊

全部文章

水泥混凝土制品

Ⅲ型重载混凝土轨枕的设计与试验研究
Ⅲ型重载混凝土轨枕的设计与试验研究
  • 郑爱国
2020年第5期
摘要
引用本文
摘 要:由于重载列车速度的提高和运量的增加,轨道结构伤损破坏加速、线路设备病害发生和发展速度加快。目前,我国尚无27t及以上重载铁路专用轨枕,为有效解决线路用枕需求,采用预应力混凝土轨枕设计方法,对设计荷载分析、结构型式尺寸及结构强度计算进行了设计,并完善了27t轴重重载轨枕的制造工艺,通过试验和检测,满足重载轨枕的质量要求。Abstract:Theincreaseofspeedandtrafficvolumeofheavy-dutytrainmakesthedamageanddamageoftrackstructureaccelerate,andtheoccurrenceanddevelopmentspeedoflineequipmentdiseasesaccelerate.Therearenospecialsleepersfor27toraboveheavyhaulrailwayinChina.Inordertoeffectivelysolvethedemandofsleepersfortherailway,byusingthedesignmethodofprestressedconcretesleeper,thedesignloadanalysis,structuraltypesizeandstructuralstrengthcalculationaredesigned,andthemanufacturingprocessof27taxleloadheavy-dutysleeperisimproved.Thequalityofheavy-dutysleeperisensuredthroughnecessarytests.
郑爱国.Ⅲ型重载混凝土轨枕的设计与试验研究[J].混凝土与水泥制品,2020(5):42-45. ZHENG A G.Design and Experimental Study of Type ⅢHeavy Haul Concrete Sleeper[J].China Concrete and Cement Products,2020(5):42-45.
海洋腐蚀环境下钢筋混凝土梁疲劳试验研究
海洋腐蚀环境下钢筋混凝土梁疲劳试验研究
  • 张秋悦1,王 晖1,韩文臣2
2020年第5期
摘要
引用本文
摘 要:对8根钢筋混凝土梁进行了大气环境、淡水及海水环境下的疲劳试验,研究了其力学性能及刚度损伤演化规律。进一步分析了三种环境与循环荷载共同作用下试件梁的破坏形态、挠度发展规律和疲劳寿命。试验结果表明,腐蚀和疲劳存在耦合作用,海水腐蚀环境与5%~70%荷载水平作用下,梁疲劳寿命最短。根据理论分析和试验结果,对钢筋混凝土梁在严酷海洋环境下的疲劳寿命及其规律进行了进一步研究,参考已有文献和试验研究结果给出了基于钢筋混凝土梁刚度损伤演化规律的疲劳寿命预测模型,经计算,实测结果与该预测模型计算结果之间的误差不超过13%。Abstract:Thefatiguetestsofeightreinforcedconcretebeamsunderatmospheric,freshwaterandseawaterconditionswerecarriedouttostudythemechanicalpropertiesandstiffnessdamageevolutionofreinforcedconcretebeams.Furtheranalyzethefailuremode,deflectiondevelopmentlawandfatiguelifeofthespecimenbeamundertheinteractionofthreeenvironmentsandcyclicloads.Thetestresultsshowthatthereiscouplingbetweencorrosionandfatigue.Undertheactionofseawatercorrosionenvironmentand5%~70%loadlevel,thefatiguelifeofthebeamistheshortest.Accordingtothetheoreticalanalysisandexperimentalresults,thefatiguelifeanditsregularityofreinforcedconcretebeamsunderseveremarineenvironmentarefurtherstudied.Referringtotheexistingliteratureandexperimentalresearchresults,thefatiguelifepredictionmodelbasedonthestiffnessdamageevolutionlawofreinforcedconcretebeamsisgiven.Aftercalculation,theerrorbetweenthemeasuredresultsandthecalculatedresultsofthepredictivemodeldoesnotexceed13%.
张秋悦,王晖,韩文臣.海洋腐蚀环境下钢筋混凝土梁疲劳试验研究[J].混凝土与水泥制品,2020(5):38-41. ZHANG Q Y,WANG H, HAN W C.Experimental Study on Fatigue Behavior of Reinforced Concrete Beams under Marine Corrosion Environment[J].China Concrete and Cement Products,2020(5):38-41.
复合应力下PVA-ECC受扭柱的抗震性能试验研究
复合应力下PVA-ECC受扭柱的抗震性能试验研究
  • 梁 肖1,邵永健1,凌 智1,王国佐2
2020年第5期
摘要
引用本文
摘 要:通过6根钢筋加强ECC柱和1根普通混凝土柱在压-弯-剪-扭复合应力状态下抗震性能试验,研究了构件的滞回曲线、骨架曲线、强度退化、刚度退化以及破坏形态,分析了配箍率、纵筋配筋率、纤维掺量对ECC受扭柱抗震性能的影响。试验结果表明,较普通RC柱,ECC柱的滞回曲线更加饱满,屈服扭矩、极限扭矩以及极限扭率分别提高了64.4%、74.8%、123.3%;试件的纤维掺量从1%提高到2%,延性系数从2.30增至4.04;随着配箍率增大,试件受扭性能增强,较于未配置箍筋的试件,箍筋间距为75mm的试件延性系数提高了66.2%,极限扭矩提高了34.0%。Abstract:Basedontheseismicperformancetestof6ECCcolumnsstrengthenedwithsteelbarsandoneordinaryconcretecolumnundertheconditionofcompressionbendingsheartorsioncompositestress,thehystereticcurve,skeletoncurve,strengthdegradation,stiffnessdegradationandfailuremodeofthecomponentwerestudied,andtheinfluenceofstirrupratio,longitudinalreinforcementratioandfibercontentontheseismicperformanceofECCcolumnssubjectedtotorsionwasanalyzed.TheresultsshowthatthehystereticcurveofECCcolumnisfullerthanthatofordinaryRCcolumn,andtheyieldtorque,ultimatetorqueandlimittorsionrateareincreasedby64.4%,74.8%and123.3%respectively.Thefibercontentincreasesfrom1%to2%,theductilitycoefficientincreasesfrom2.30to4.04.Withtheincreaseofstirrupratio,thetorsionalperformanceofspecimenisenhanced.Comparedwiththespecimenwithoutstirrup,theductilitycoefficientandultimatetorqueofspecimenwithstirrupspacingof75mmareincreasedby66.2%and34.0%respectively.
梁肖,邵永健,凌,智,等.复合应力下PVA-ECC受扭柱的抗震性能试验研究[J].混凝土与水泥制品,2020(5):34-37. LIANG X,SHAO Y J,LING Z,et al.Experimental Study on Seismic Behavior of PVA-ECC Columns under Composite Stress[J].China Concrete and Cement Products,2020(5):34-37.
管芯纵向裂缝对BCCP承载能力影响研究
管芯纵向裂缝对BCCP承载能力影响研究
  • 孙岳阳1,胡少伟1,2,明 攀1,薛 翔2
2020年第5期
摘要
引用本文
摘   要:为了研究管芯纵向裂缝对BCCP(钢筋缠绕钢筒混凝土压力管)承受内、外压能力的影响,选取合适的材料本构模型,利用ABAQUS软件建立了DN1 800 BCCP内、外压计算模型,在内压管的钢筒外管芯和外压管的管顶钢筒内管芯处分别设置了1 000 mm、2 000 mm、3 000 mm、4 000 mm的纵向裂缝,将计算结果与完好管进行了对比。结果表明,对于内压管,外管芯纵向裂缝仅对外管芯达到受拉极限所对应的内压值产生影响,且该值与纵向裂缝长度无关,均在2.95 MPa左右,比完好管小0.25 MPa;对于外压管,管顶内管芯纵向裂缝仅对裂缝所在位置处达到受拉极限所对应的外压值产生影响,同样与纵向裂缝长度无关,均在1 200 kN左右,比完好管小300 kN;无论是内压管还是外压管,保护层、钢筒和钢筋达到极限强度时所对应的荷载值都与管芯有无裂缝以及裂缝长度无关。 Abstract: In order to study the effect of longitudinal crack on the capacity of BCCP under internal or external pressure, the finite element software ABAQUS was used to establish two calculation models with the same diameter of 1 800 mm and appropriate material constitutions were selected. The longitudinal cracks of 1 000 mm,  2 000 mm, 3 000 mm and 4 000 mm in length were arranged in the outer core of BCCP under internal pressure and in the top of the inner core under external pressure. The calculated results were compared with those of the intact pipe. The results show that for the pipe under internal pressure, the longitudinal crack of the outer core only affects the pressure corresponding to the tensile limit of the outer core, and this value is independent of the crack length, which is about 2.95 MPa, and is 0.25 MPa smaller than that of the intact pipe. For the pipe under external pressure, the longitudinal crack in the top of the inner core only affects the pressure corresponding to the tensile limit at the location of the crack, which is also independent of the crack length. The calculation results of loads are all around 1 200 kN, which is 300 kN smaller than that of the intact pipe. Whether BCCP is under internal or external pressure, the loads corresponding to the protective cover, cylinder and steel bar when they reach the ultimate strength are independent of the cracks in core and length of cracks. 
孙岳阳,胡少伟,明攀,等.管芯纵向裂缝对BCCP承载能力影响研究[J].混凝土与水泥制品,2020(5):28-33. SUN Y Y, HU S W,MING P,et al.Study on the Effect of Longitudinal Crack in Core Pipe on the Bearing Capacity of BCCP[J].China Concrete and Cement Products,2020(5):28-33.
上一页
1

关注《混凝土与水泥制品》

总访问量 468,401   网站统计

官方微信公众号关闭
苏州混凝土水泥制品研究院有限公司

关于我们    |    联系我们    |    订购杂志    |    回到顶部

版权所有:中国混凝土与水泥制品网  苏ICP备10086386号   网站建设:中企动力 苏州

版权所有:中国混凝土与水泥制品网

苏ICP备10086386号

网站建设:中企动力 苏州