高阻尼混凝土构件阻尼性能研究
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摘要
首先测得了钢筋、高阻尼砂浆及高阻尼混凝土悬臂梁在不同初始顶点位移下的自由衰减曲线,得到了构件阻尼比随变形增大的变化规律。研究了聚灰比、乳液共混及不同纤维的掺入对高阻尼混凝土悬臂梁力学性能和阻尼性能的影响。在此基础上,提出了高阻尼混凝土构件阻尼比的计算理论与方法。通过与国内外相关研究的比较,校验了该方法的科学性。
Three groups of displacement decay curves corresponding to rebars,mortar cantilever beams and concrete cantilever beams under different vertex displacements were measured,and the variation laws of damping ratio versus deformation(including plastic deformation) of high damping concrete members in plastic stage were obtained.In addition,the influences of polymer-cement ratio,latex blend and different fibers on compressive strength and damping ratio of high damping concrete cantilever bearns were analyzed.Based on these results,some new calculation formula for the damping ratio of the concrete members was proposed.Comparing with the relevant literatures both domestic and abroad,the validity of the proposed method was verified.
Three groups of displacement decay curves corresponding to rebars,mortar cantilever beams and concrete cantilever beams under different vertex displacements were measured,and the variation laws of damping ratio versus deformation(including plastic deformation) of high damping concrete members in plastic stage were obtained.In addition,the influences of polymer-cement ratio,latex blend and different fibers on compressive strength and damping ratio of high damping concrete cantilever bearns were analyzed.Based on these results,some new calculation formula for the damping ratio of the concrete members was proposed.Comparing with the relevant literatures both domestic and abroad,the validity of the proposed method was verified.
引文
[1]欧进萍,关新春.土木工程的智能结构体系研究与发展[J].地震工程与工程振动,1999,(2):21-28.
[2]Fu X L,Chung D D L.Vibration damping admixture forcement[J].Cement and Concrete Research,1996,26:69-75.
[3]Fu X L,Li X H,Chung D D L.Improving the vibrationdamping capacity of cement[J].Materials Science,1998,33:3601-3605.
[4]Qrak S.Investigation of vibration damping on polymerconcrete with polyster resin[J].Cement and ConcreteResearch,2000,(30):171-174.
[5]Wong W C,Fang P,Pan J K.Polymer effects on thevibration damping behavior of cement[J].Journal of Materalsin Civil Engineering,ASCE,2003,554-556.
[6]柯国军,郭长青,胡绍全,等.混凝土阻尼比研究[J].建筑材料学报,2004,7(1):35-40.
[7]万泽青,刘平,施伟.高阻尼混凝土的试验研究及阻尼机理探讨[J].混凝土,2007,(7):37-40.
[8]刘铁军,欧进萍.水泥砂浆强度和阻尼增强掺料及试验[J].低温建筑技术,2003,(1):7-9.
[9]钟世云,陈志源,康勇,等.聚合物乳液共混物及其改性水泥砂浆的力学性能[J].混凝土与水泥制品,2002,(1):10-14.
[10]普通混凝土力学性能试验方法标准.GB/T50081-2002.
[11]尚世英,董至仁.钢筋混凝土构件阻尼值试验研究[J].工程抗震,1993,12(4):18-19..
[12]Davenport A G,Hill-Carroll P.Damping in tall buildings:itsvariability and treatment in design[J].ASCE SpringConvention,Seattle,USA,Building Motion in Wind,1986,42-57.
[13]Jeary A P.Damping in tall buildings:a mechanism and apredictor[J].Earthquake Eng.Struct.Dyn,1986,14:733-750.
[14]Jeary A P.The description and measurement of nonlineardamping in structures[J].J.Wind Eng.Ind.Aerodyn,1996,59:103-114.
[15]AIJ(2000)damping in buildings[S].Architectural Instituteof Japan,Tokyo(in Japanese),2000.
[2]Fu X L,Chung D D L.Vibration damping admixture forcement[J].Cement and Concrete Research,1996,26:69-75.
[3]Fu X L,Li X H,Chung D D L.Improving the vibrationdamping capacity of cement[J].Materials Science,1998,33:3601-3605.
[4]Qrak S.Investigation of vibration damping on polymerconcrete with polyster resin[J].Cement and ConcreteResearch,2000,(30):171-174.
[5]Wong W C,Fang P,Pan J K.Polymer effects on thevibration damping behavior of cement[J].Journal of Materalsin Civil Engineering,ASCE,2003,554-556.
[6]柯国军,郭长青,胡绍全,等.混凝土阻尼比研究[J].建筑材料学报,2004,7(1):35-40.
[7]万泽青,刘平,施伟.高阻尼混凝土的试验研究及阻尼机理探讨[J].混凝土,2007,(7):37-40.
[8]刘铁军,欧进萍.水泥砂浆强度和阻尼增强掺料及试验[J].低温建筑技术,2003,(1):7-9.
[9]钟世云,陈志源,康勇,等.聚合物乳液共混物及其改性水泥砂浆的力学性能[J].混凝土与水泥制品,2002,(1):10-14.
[10]普通混凝土力学性能试验方法标准.GB/T50081-2002.
[11]尚世英,董至仁.钢筋混凝土构件阻尼值试验研究[J].工程抗震,1993,12(4):18-19..
[12]Davenport A G,Hill-Carroll P.Damping in tall buildings:itsvariability and treatment in design[J].ASCE SpringConvention,Seattle,USA,Building Motion in Wind,1986,42-57.
[13]Jeary A P.Damping in tall buildings:a mechanism and apredictor[J].Earthquake Eng.Struct.Dyn,1986,14:733-750.
[14]Jeary A P.The description and measurement of nonlineardamping in structures[J].J.Wind Eng.Ind.Aerodyn,1996,59:103-114.
[15]AIJ(2000)damping in buildings[S].Architectural Instituteof Japan,Tokyo(in Japanese),2000.
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