用于结构减振的聚合物混凝土试验研究
|
摘要
对于目前工程中新出现的桥梁-建筑合一的大型结构,如何减小运行荷载产生的振动是颇受关注的问题。该研究通过在混凝土中掺入高分子聚合物以提高其阻尼性能达到减振的目的。采用矩形截面简支梁和以实际大跨复杂箱梁为原型的1/6缩尺模型,分别进行振动测试、静载试验和疲劳试验,对比普通混凝土和聚合物混凝土的阻尼性能、静力性能和疲劳性能。同时测试基准混凝土和各聚灰比的聚合物混凝土试块的抗压强度和弹性模量。试验结果表明,随聚灰比的增大混凝土梁的阻尼比大幅增大,试块抗压强度和弹性模量略有下降,但满足规范的要求。聚合物混凝土梁的静力性能比普通混凝土梁更好,疲劳性能与之相当。聚合物混凝土的施工性能指标如塌落度和扩展度良好。
It is essential for a newly emerging combined structure of railway-bridge and building to alleviate vibration induced by a high speed train.A kind of polymer was mixed with concrete to improve its damping.A series of experiments including vibration test,static loading one and fatigue one were carried out on small specimens,simply supported beams and reduced scale models of a real long span box girder to measure the compression strength,static modulus and damping and to compare the static and fatigue performance of ordinary concrete and polymer concrete.The test results showed that the damping ratio increases with increase in ratio of polymer and cement,but the compression strength and static modulus decrease a little;the static performance of the polymer concrete beams is better than that of the ordinary concrete ones,and the fatigue behavior of the former is the same as that of the latter;the workability of the polymer concrete including slump and slump flow is good.
It is essential for a newly emerging combined structure of railway-bridge and building to alleviate vibration induced by a high speed train.A kind of polymer was mixed with concrete to improve its damping.A series of experiments including vibration test,static loading one and fatigue one were carried out on small specimens,simply supported beams and reduced scale models of a real long span box girder to measure the compression strength,static modulus and damping and to compare the static and fatigue performance of ordinary concrete and polymer concrete.The test results showed that the damping ratio increases with increase in ratio of polymer and cement,but the compression strength and static modulus decrease a little;the static performance of the polymer concrete beams is better than that of the ordinary concrete ones,and the fatigue behavior of the former is the same as that of the latter;the workability of the polymer concrete including slump and slump flow is good.
引文
[1]颜锋,钱基宏,赵鹏飞,等.武汉火车站高速列车对建筑结构的振动影响研究[J].建筑结构,2009,39(1):25-29.
[2]Fowler D W.Polymers in Concrete:A Vision for the 21stCentury[J].Cement&Concrete Composites,1999,(21):449-452.
[3]Kardon J B.Polymer-Modified Concrete:Review[J].Journal of Materials in Civil Engineering,May,1997,85-92.
[4]Amick H,Monteiro P J M.Modification of concrete dampingproperties for vibration control in technology facilities.Proceedings of the SPIE-The International Society for OpticalEngineering,2005,5933:1-12.
[5]Bai W F,Zhang J H,Yan P,et al.Study on vibrationalleviating properties of glass fiber reinforced polymer concretethrough orthogonal tests[J].Materials and Design,2009,30(4):1417-1421.
[6]上海宝冶工程技术公司.一种高阻尼减振水泥混凝土[P].CN200710043025.X.2008-12-31.
[7]柯国军,胡绍全,郭长青,等.羧基丁苯胶水泥混凝土阻尼值的探索性研究[J].四川建筑科学研究,2003,29(4):60-63.
[8]柯国军,郭长青,陈振富,等.混凝土阻尼比研究[J].建筑材料学报,2004,7(1):35-40.
[9]陈振富,柯国军,胡绍全,等.羧基丁苯聚合物混凝土小变形阻尼研究[J].防灾减灾工程学报,2003,23(4):41-44.
[10]武汉理工大学.高强高阻尼混凝土的制备方法[P].CN101172820.2008-5-7.
[11]刘铁军,欧进萍.水泥砂浆构件强度和阻尼增强掺料及试验[J].低温建筑技术,2003,(1):7-9.
[12]刘铁军,欧进萍.聚合物水泥砂浆阻尼性能的研究[J].新型建筑材料,2003(4):7-9.
[13]刘铁军,欧进萍.高阻尼混凝土框架的动力特性与抗震试验[J].地震工程与工程振动,2008,28(2):72-76.
[14]万泽青.高阻尼混凝土的试验研究及其在结构耗能减震中的应用[A].扬州大学,2005.
[15]钱勇.局部聚合物混凝土结构动力学性能研究[A].扬州大学,2006.
[2]Fowler D W.Polymers in Concrete:A Vision for the 21stCentury[J].Cement&Concrete Composites,1999,(21):449-452.
[3]Kardon J B.Polymer-Modified Concrete:Review[J].Journal of Materials in Civil Engineering,May,1997,85-92.
[4]Amick H,Monteiro P J M.Modification of concrete dampingproperties for vibration control in technology facilities.Proceedings of the SPIE-The International Society for OpticalEngineering,2005,5933:1-12.
[5]Bai W F,Zhang J H,Yan P,et al.Study on vibrationalleviating properties of glass fiber reinforced polymer concretethrough orthogonal tests[J].Materials and Design,2009,30(4):1417-1421.
[6]上海宝冶工程技术公司.一种高阻尼减振水泥混凝土[P].CN200710043025.X.2008-12-31.
[7]柯国军,胡绍全,郭长青,等.羧基丁苯胶水泥混凝土阻尼值的探索性研究[J].四川建筑科学研究,2003,29(4):60-63.
[8]柯国军,郭长青,陈振富,等.混凝土阻尼比研究[J].建筑材料学报,2004,7(1):35-40.
[9]陈振富,柯国军,胡绍全,等.羧基丁苯聚合物混凝土小变形阻尼研究[J].防灾减灾工程学报,2003,23(4):41-44.
[10]武汉理工大学.高强高阻尼混凝土的制备方法[P].CN101172820.2008-5-7.
[11]刘铁军,欧进萍.水泥砂浆构件强度和阻尼增强掺料及试验[J].低温建筑技术,2003,(1):7-9.
[12]刘铁军,欧进萍.聚合物水泥砂浆阻尼性能的研究[J].新型建筑材料,2003(4):7-9.
[13]刘铁军,欧进萍.高阻尼混凝土框架的动力特性与抗震试验[J].地震工程与工程振动,2008,28(2):72-76.
[14]万泽青.高阻尼混凝土的试验研究及其在结构耗能减震中的应用[A].扬州大学,2005.
[15]钱勇.局部聚合物混凝土结构动力学性能研究[A].扬州大学,2006.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心