【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。更多还原

【Abstract】 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.更多还原