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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    第一期

    基于ANSYS的薄壁墩受力性能分析及參數優化研究
    基于ANSYS的薄壁墩受力性能分析及參數優化研究
    • 唐先習,張景偉,孫拴虎,何 勇
    2019年第1期
    摘要
    引用本文
    摘 要:在高速公路剛構橋墩臺設計與施工中,箱型薄壁墩與雙薄壁墩因其施工簡便,經濟實用等特點而被廣泛采用。本文基于ANSYS有限元軟件分別對這兩種結構形式進行了建模分析,以期通過對比他們的力學性能來優化設計方案,選取合理的設計參數,進一步指導施工。通過分析對比在荷載作用下最不利截面上應力和位移的變化情況,總結出同一形式薄壁墩在同一截面與不同截面下應力的變化規律,以及不同橫截面積情況下橋墩頂端位移的變化規律。在考慮兩種形式的薄壁墩受力性能的的基礎上,給出了優化箱型薄壁墩薄壁厚度的選取范圍,并針對雙薄壁墩提出增加橫向連接的建議。 Abstract: During the construction of rigid frame piers of expressways, box thin-walled piers and double thin-walled piers are widely used because of their lots of characteristic, such as simple construction, economy, practicality and so on. ANSYS finite element software is used to model and analyze the two types of structures, in order to optimize the design scheme by comparing their mechanical properties, and select reasonable design parameters, and guide the construction. By analyzing and comparing the changes of stress and displacement on the most dangerous cross-section under the load, the law of stress variation of the same type of thin-walled pier under the same cross-section and different cross-section are summarized. On the basis of considering the mechanical properties of two types of thin-walled piers, the thin-walled thickness of box thin-walled piers is given, and suggestions for adding the lateral connection of double thin-walled piers are put forward.
    唐先習,張景偉,孫拴虎,等.基于ANSYS的薄壁墩受力性能分析及參數優化研究[J].混凝土與水泥制品,2019(1):85-90. TANG X X,ZHANG J W,SUN S H,et al.Analysis of Mechanical Performance and Parameter Optimization of Thin-walled Pier Based on ANSYS[J].China Concrete and Cement Products,2019(1):85-90.
    顆粒整形對石屑性能改善的試驗研究
    顆粒整形對石屑性能改善的試驗研究
    • 譚世霖,蔣雪琴,楊醫博,周啟源
    2019年第1期
    摘要
    引用本文
    摘 要:石場在不同的加工機械與工藝條件下得到的石屑性能差別較大,導致可在混凝土中利用的石屑數量非常有限。為了增加石屑的可利用性能,進行了石屑顆粒整形的研究。研究結果表明,對石屑進行顆粒整形,能夠將不滿足建設用砂要求的石屑,加工成除石粉含量略高外,其它性能均滿足建設用砂要求的整形石屑。 Abstract: The properties of stone chips obtained by quarries under different processing machinery and technology conditions are quite different, which leads to the very limited number of stone chips available in concrete. In order to increase the utilization performance of stone chips, a study on the shaping of stone chips was carried out. The research results show that the granular shaping of stone chips can process the shaping stone chips which can not meet the requirements of construction sand into shaping stone chips whose properties meet the requirements of construction sand except for the slightly higher content of stone powder.
    譚世霖,蔣雪琴,楊醫博,等.顆粒整形對石屑性能改善的試驗研究[J].混凝土與水泥制品,2019(1):91-94+100. TAN S L,JIANG X Q,YANG Y B,et al.Experimental Research of Particle Shaping on Performance Improvement of Stone Chips[J].China Concrete and Cement Products,2019(1):91-94+100.
    粉煤灰改性透水再生混凝土力學性能試驗研究
    粉煤灰改性透水再生混凝土力學性能試驗研究
    • 張衛東,王振波
    2019年第1期
    摘要
    引用本文
    摘 要:通過改變粉煤灰取代率及超摻系數,研究了粉煤灰對不同水灰比及再生混凝土粗骨料取代率透水再生混凝土力學性能的影響。結果表明,粉煤灰等量取代水泥的透水再生混凝土立方體抗壓強度、抗折強度及折壓比均低于基準透水再生混凝土;當粉煤灰超量取代水泥時,粉煤灰取代率低于20%時的立方體抗壓強度、抗折強度及折壓比均隨超量系數增加而增大,但超量系數超過1.4后效果不明顯;粉煤灰取代率為30%時,不同粉煤灰超量系數下力學性能均低于基準試驗值;隨著再生混凝土粗骨料取代率或水灰比的增大,立方體抗壓強度、抗折強度及折壓比均隨之下降,相同水灰比或再生混凝土粗骨料取代率時,立方體抗壓強度、抗折強度及折壓比均隨粉煤灰超量系數增大而增大,但超量系數超過1.4后效果同樣不明顯。 Abstract: Through changing the replacement ratio and excessive incorporation coefficient of fly ash, the effect of fly ash on the mechanical properties of the pervious recycled concrete with different W/C and the replacement ratio of recycled aggregate is studied, and the optimal replacement ratio of fly ash and excess incorporation coefficient are determined. The results show that the cubic compressive strength, flexural strength, and the ratio of flexural strength to compressive strength of pervious recycled concrete with equal amounts of fly ash to replace cement are all lower than those of normal pervious recycled concrete; when the fly ash corctent is over and the replacement ratio of fly ash is lower than 20%, the cubic compressive strength, flexural strength and the ratio of flexural strength to compressive strength increase with the increase of the excessive incorporation coefficient, but the effect is not obvious after the excessive incorporation coefficient exceeds 1.4; When the replacement ratio of fly ash is 30%, the mechanical properties of different fly ash exceesive incorporation coefficients are lower than the benchmark value, so it is recommended that the replacement ratio of fly ash should not exceed 20%. With the increase of the replacement ratio of recycled concrete aggregates or the W/C, the cubic compressive strength, flexural strength and the ratio of flexural strength to compressive strength all decrease. Under the same W/C or the replacement ratio of recycled concrete aggregates, the cubic compressive strength, flexural strength, and the ratio of flexural strength to compressive strength all increase with the increase of the fly ash excessive incorporation coefficient, but the effect is not also obvious after the excessive incorporation coefficient exceeds 1.4.
    張衛東,王振波.粉煤灰改性透水再生混凝土力學性能試驗研究[J].混凝土與水泥制品,2019(1):95-100. ZHANG W D,WANG Z B.Experimental Study on Mechanical Properties of Pervious Recycled Concrete Modified by Fly Ash[J].China Concrete and Cement Products,2019(1):95-100.
    砌筑砂漿抗壓強度現場檢測技術方法研究
    砌筑砂漿抗壓強度現場檢測技術方法研究
    • 侯高峰
    2019年第1期
    摘要
    引用本文
    摘 要:針對目前砌筑砂漿強度檢測領域采用的技術方法及研究現狀進行分析,總結和比較了不同檢測技術方法的優缺點,探討了砌筑砂漿抗壓強度檢測技術方法的研究發展。研究結果表明,應根據不同的工程情況,選擇不同的檢測方法,以便更準確地推定砌筑砂漿抗壓強度、更好地為工程質量控制服務,同時確保結構的安全。 Abstract: In view of the present method and the adopted technology of the masonry mortar strength testing field research status are analyzed, the advantages and disadvantages of different detection methods are summarized and compared, the masonry mortar compressive strength testing technology and methods of research and development are discussed. The results show that different detection methods should be selected according to different engineering conditions, so that more accurate presumption of compressive strength of masonry mortar can better service for the engineering quality control, which can ensure the structure safety.
    侯高峰.砌筑砂漿抗壓強度現場檢測技術方法研究[J].混凝土與水泥制品,2019(1):79-84. HOU G F.Research of Field Testing Technology on Compressive Strength of Masonry Mortar[J].China Concrete and Cement Products,2019(1):79-84.
    基于擴展有限元的混凝土梁斷裂破壞仿真研究
    基于擴展有限元的混凝土梁斷裂破壞仿真研究
    • 吳渝玲,馬建斌
    2019年第1期
    摘要
    引用本文
    摘 要:基于擴展有限元方法,模擬不同縫高比以及截面高度混凝土三點彎曲梁斷裂破壞過程,構建了混凝土梁荷載-開口位移的數學模型,研究初始縫高比及構件尺寸對混凝土梁應力強度因子以及損傷耗能的影響發展規律。研究結果表明,混凝土梁三點彎曲的荷載-開口位移發展曲線可以分為線性上升、非線性上升與非線性下降三個階段?;炷亮旱挚箶嗔哑茐牡哪芰S著初始縫高比的增大而減小,隨著構件截面高度的增大而增強。相同荷載下混凝土應力強度因子會隨著初始縫高比的增大而增大,隨著截面高度的增大而減小?;炷亮簶嫾c彎曲加載過程中的損傷耗能具有明顯的三階段發展演化規律。 Abstract: The simulation of different seam height ratio and section height of concrete beam fracture failure process under three point bending stress was carried out based on extended finite element method. The mathematical model of the concrete beam load-opening displacement was built. The influence of the initial size seam high ratio and component size on the stress intensity factor of concrete beam and the damage energy dissipation law of development was studide. The results show that the load and opening displacement curve of concrete beams under three point bending stress can be divided into linear ascend, nonlinear ascend and non-linear decline in three stages. The concrete beam fracture damage resistance decreases with the increase of initial seam height ratio and enhances with the increase of component section height. The stress intensity factor of concrete will increase with the increase of initial seam height ratio and decrease with the increase of section height under the same load. The damage energy consumption of concrete beam component under three-point bending loading has obvious three-stage evolution regularity.
    吳渝玲,馬建斌.基于擴展有限元的混凝土梁斷裂破壞仿真研究[J].混凝土與水泥制品,2019(1):73-78. WU Y L,MA J B.Study on Simulation of Fracture Failure of Concrete Beams Based on Extended Finite Element[J].China Concrete and Cement Products,2019(1):73-78.
    用廢棄發泡水泥制備輕骨料泡沫混凝土的研究
    用廢棄發泡水泥制備輕骨料泡沫混凝土的研究
    2019年第1期
    摘要
    引用本文
    摘??要:將廢棄發泡水泥加工成輕骨料,摻入發泡水泥漿中制備輕骨料泡沫混凝土,測試其干密度、抗壓強度、比強度、軟化系數、導熱系數和質量吸水率等性能。結果表明,干密度隨著輕骨料摻量的增加先增加后減少,抗壓強度、比強度、軟化系數和導熱系數均隨著輕骨料摻量的增加而減少,質量吸水率則隨著輕骨料摻量的增加而增加。當廢棄發泡水泥輕骨料的摻量為60kg/m3時,輕骨料泡沫混凝土比強度高、導熱系數小、軟化系數高,綜合性能優異。Abstract:Thewastefoamedcementisprocessedintolightaggregateandmixedintofoamedcementslurrytopreparelightweightaggregatefoamconcrete,anditsdrydensity,compressivestrength,specificstrength,softeningcoefficient,thermalconductivityandmasswaterabsorptionratearetested.Theresultsshowthatthedrydensityincreasesfirstandthendecreaseswiththeincreaseoflightaggregatecontent.Thecompressivestrength,specificstrength,softeningcoefficientandthermalconductivitydecreasewiththeincreaseoflightaggregatecontent,andthemasswaterabsorptionrateincreaseswiththeincreaseintheamountoflightaggregateincreases,andtheinterfacebetweenthefoamedcementslurryandthewastefoamedcementlightweightaggregateisgood.Whenthedosageofwastefoamedcementlightaggregateis60?kg/m3,thelightweightaggregatefoamconcretehashighspecificstrength,smallthermalconductivity,highsofteningcoefficientandexcellentcomprehensiveperformance.
    黃芳美,薛力梨,劉紅飛,等.用廢棄發泡水泥制備輕骨料泡沫混凝土的研究[J].混凝土與水泥制品,2019(1):69-72. HUANG F M,XUE L L,LIU H F,et al.Research on Lightweight Aggregate Foam Concrete Prepared by Waste Foamed Cement[J].China Concrete and Cement Products,2019(1):69-72.
    裝配式建筑疊合樓板研究進展
    裝配式建筑疊合樓板研究進展
    • 劉 洋,李志武,楊思忠,王文靜
    2019年第1期
    摘要
    引用本文
    摘 要:疊合樓板因施工便捷、整體性好,近年來在我國裝配式建筑中得到了迅速的發展,并結合底板設肋、預應力、空心技術發展出多種新形式,拓寬了疊合板的應用范圍。本文系統地介紹了四大類疊合板:無肋底板疊合板、帶肋底板疊合板、空心底板疊合板、梁板一體疊合板的受力性能、設計方法的研究進展以及板間連接節點的研究現狀,提出了疊合板研究中存在的問題和不足,可為后續研究工作提供參考。 Abstract: Due to the advantages of efficient construction and good overall performance, composite slabs are widely applied to prefabricated building recently in China. Several new types of composite slabs have been developed on the basis of several key technologies such as ribbed precast slab technology, prestressed technology, hollow precast slab technology to broaden the application of composite slabs. Some recent advances in research of the characteristic of composite slabs and its connections between slabs were introduced comprehensively according to four categories of composite slabs, such as composite slab using precast slab without ribs, composite slab using precast slab with ribs, composite slab using hollow precast slab and composite slab with beam. Finally, the insufficiencies of recent research on composite slabs were pointed out, and the suggestions to be investigated in the future were provided.
    劉洋,李志武,楊思忠,等.裝配式建筑疊合樓板研究進展[J].混凝土與水泥制品,2019(1):61-68. LIU Y,LI Z W,YANG S Z,et al.Development Progress on Composite Slabs for Prefabricated Buildings[J].China Concrete and Cement Products,2019(1):61-68.
    鋼纖維搭配對超高性能混凝土拌合物性能的影響
    鋼纖維搭配對超高性能混凝土拌合物性能的影響
    • 高育欣,沈 銳,程寶軍,麻鵬飛,完么東智
    2019年第1期
    摘要
    引用本文
    摘 要:通過設計不同水膠比、鋼纖維摻量下超高性能混凝土(UHPC)配合比,比較了T200與min-v漏出時間和流動度的關系,發現T200能較好反映UHPC黏度的變化,與流動度共同表征UHPC的流變性能。采用較短纖維替代長纖維,其質量比小于0.75時,隨著短纖維的加入能降低UHPC的黏度;當超過0.75后,長短鋼纖維的“墻體效應”作用對流動度的貢獻作用降低明顯。長短纖維搭配能提高UHPC的綜合性能。隨著纖維影響因素(k)的增加,流動度先增加后降低;k值的變化與抗壓強度和抗折強度呈良好的線性關系。 Abstract: By designing the ratio of ultra high performance concrete(UHPC) under different water-to-binder ratio and steel fiber content, the relationship between T200 and min-v leakage time and fluidity was compared. It was found that T200 can better reflect the change of UHPC viscosity. T200 and fluidity can reflect the rheological properties of UHPC. Short fiber was used to replace long fiber. When the mass ratio of long fiber and short fiber is less than 0.75, the viscosity of UHPC can be reduced with the addition of short fiber. When it exceeds 0.75, the effect of wall effect of long and short steel fiber on fluidity is obviously reduced. The combination of long and short fibers can improve the overall performance of UHPC. With the increase of fiber influencing factor(k), the fluidity increases first and then decreases; the change of k value has a good linear growth relationship with compressive strength and flexural strength.
    高育欣,沈銳,程寶軍,等.鋼纖維搭配對超高性能混凝土拌合物性能的影響[J].混凝土與水泥制品,2019(1):55-60. GAO Y X,SHEN R,CHENG B J,et al.The Influence of Steel Fiber Mixing on Properties of UHPC Mixture[J].China Concrete and Cement Products,2019(1):55-60.
    鋼纖維取向角對超高性能混凝土抗拉強度的影響
    鋼纖維取向角對超高性能混凝土抗拉強度的影響
    • 王 強
    2019年第1期
    摘要
    引用本文
    摘??要:為了明確鋼纖維在超高性能混凝土(UHPC)中的增韌效果,人為改變鋼纖維在UHPC拌合物中的排列取向。采用隨機澆筑、順拉伸方向澆筑、垂直拉伸方向澆筑三種成型模式成型了UHPC拉伸試件,通過軸拉試驗得到UHPC的應力-應變曲線,并從斷面觀測鋼纖維的分布取向。試驗結果表明,鋼纖維的取向對拉伸強度有決定性影響,其中,順拉伸方向澆筑的UHPC抗拉強度達到12.4MPa,極限應變達到了0.0038;從拉伸斷面上分析得出UHPC的抗拉強度與鋼纖維沿軸向取向角有線性相關性。Abstract:Inordertoclarifythetougheningeffectofsteelfiberinultra-highperformanceconcrete(UHPC),theorientationofsteelfiberinUHPCmixturewaschangedartificiallybychangingthepouringdirectionofUHPC.Thetensiletestonshapespecimenswasformedbythreekindsofmoldingmodels:randompouring,indirectionofstretchingandverticaldirection.Thestress-straincurveofUHPCwasobtainedbyaxialtensiletest,andthedistributionorientationofsteelfiberwasobservedfromthecrosssection.Thetestresultsshowthattheorientationofsteelfiberhasadecisiveinfluenceonthetensilestrength.Especially,thetensilestrengthofUHPCisupto12.4MPaalongthedirectionofpouring,andtheultimatestrainreaches0.0038.Fromtheanalysisofthetensilesection,itisconcludedthatthetensilestrengthofUHPCislinearlyrelatedtotheorientationangleofthesteelfiber.
    王強.鋼纖維取向角對超高性能混凝土抗拉強度的影響[J].混凝土與水泥制品,2019(1):51-54. WANG Q.The Effects of Steel Fiber Orientation on Tensile Strength of Ultra-high Performance Concrete[J].China Concrete and Cement Products,2019(1):51-54.
    孔隙結構對玄武巖纖維混凝土力學性能的影響研究
    孔隙結構對玄武巖纖維混凝土力學性能的影響研究
    • 劉子璐,陳新明,韓振宇,韓曉龍,靳翔飛
    2019年第1期
    摘要
    引用本文
    摘??要:為探究玄武巖纖維(BF)摻量對混凝土孔隙結構的作用機制,進而影響抗壓性能的規律,制作了玄武巖纖維摻量為0、1.5kg/m3、3.0kg/m3、4.5kg/m3、6.0kg/m3、7.5kg/m3的標準尺寸試塊,進行抗壓性能試驗,得出不同BF摻量混凝土各齡期下的抗壓強度。引入核磁共振(NMR)技術,測試不同BF摻量的混凝土孔隙分量結構。通過回歸分析表明,隨著纖維摻量的增加,混凝土抗壓強度呈先增后減的趨勢。BF摻量為3.5kg/m3時7d、14d抗壓強度最大,較素混凝土分別增大6.4%和7.6%,BF摻量為3kg/m3時28d抗壓強度最大,較素混凝土增加14.1%。NMR試驗結果顯示,混凝土內部總孔隙率隨著BF摻量的增大而增大,混凝土內部總孔隙率達到一定值后導致其抗壓強度降低。通過分析抗壓試驗應力-應變曲線,得出BF混凝土抗壓損規律,并對其增強機理進行了簡要分析。Abstract:Inordertostudytheandmechanismareofbasaltfiber(BF)contentonconcreteporestructureandcompressiveperformance,thestandardsizetestblocksof0,1.5?kg/m3,3.0?kg/m3,4.5?kg/m3,6.0?kg/m3,7.5?kg/m3?cubedweremade,andthecompressivestrengthofconcretewithdifferentBFcontentsateachagewasobtainedthroughthecompressiveperformancetests.Nuclearmagneticresonance(NMR)technologywasusedtotesttheporecomponentstructureofconcretewithdifferentBFdosage.Theregressionanalysisshowsthatthecompressivestrengthofconcreteincreasesfirstandthendecreaseswiththeincreaseoffibercontent.WhenBFcontentis3.5?kg/m3,the7dand14dcompressivestrengthreachthegreatest,increasingby6.4%and7.6%respectivelycomparedwithplainconcrete.WhenBFcontentis3?kg/m3,the28dcompressivestrengthreachesthegreatest,increasingby14.1%comparedwithplainconcrete.TheNMRtestresultsshowthatthetotalporosityinconcreteincreaseswiththeincreaseofthecontentofBF,andthecompressivestrengthofconcretedecreaseswhenthetotalporosityinconcretereachesacertainvalue.Byanalyzingthestress-straincurveofcompressiontest,thelawofcompressionlossofBFconcretewasobtained,andthestrengtheningmechanismwasanalyzedbriefly.
    劉子璐,陳新明,韓振宇,等.孔隙結構對玄武巖纖維混凝土力學性能的影響研究[J].混凝土與水泥制品,2019(1):47-50. LIU Z L,CHEN X M,HAN Z Y,et al.The Influence Study of Pore Structures on Mechanical Properties of Basalt Fiber Concrete[J].China Concrete and Cement Products,2019(1):47-50.
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