文献类型：期刊文献

中文题名：配筋对钢筋混凝土阻尼性能的影响

英文题名：Effect of Bar Arrangement on Damping Behavior of Reinforced Concrete

作者：梁超锋[1];刘铁军[2];邹笃建[2]

机构：[1]绍兴文理学院土木工程系;[2]哈尔滨工业大学深圳研究生院

年份：2011

卷号：14

期号：6

起止页码：839

中文期刊名：建筑材料学报

外文期刊名：Journal of Building Materials

收录：CSTPCD、、EI(收录号：20120714765610)、Scopus(收录号：2-s2.0-84856701092)、CSCD2011_2012、北大核心2008、北大核心、CSCD

基金：国家自然科学基金资助项目(50878070);国家自然科学基金重点资助项目(50938001);广东省自然科学基金资助项目(9151064101000066);浙江省自然科学基金资助项目(Y1110184)

语种：中文

中文关键词：配筋;阻尼模型;损耗因子;理论折减系数

外文关键词：bar arrangement;;materials' damping model;;loss tangent;;theoretical reduction factor

中文摘要：采用混凝土的Kelvin阻尼模型和复阻尼模型,对钢筋混凝土阻尼参数进行了分析,推导得到了弹性阶段弯曲振动时钢筋混凝土阻尼性能的理论折减系数.研究了弯曲振动时钢筋混凝土损耗因子与配筋率、激励频率间的关系.结果表明:钢筋混凝土损耗因子随配筋率的增加和激励频率的提高而下降,且初始下降较快,而后渐趋平缓.将试验数据与理论折减系数进行对比分析,发现在配筋率较高时,理论折减系数与实测阻尼变化趋势接近,而在配筋率较低时,由于未考虑素混凝土的阻尼性能与激励频率的关系,两者间存在一定的偏差.

外文摘要：Damping parameters of material and structure are of great influence on structural response and damage.It is necessary to investigate the effects of steel bar on the damping behavior of reinforced concrete. On the basis of Kelvin damping model and complex damping model,the dynamical parameters analysis of material damping was carried out to obtain the theoretical reduction factor of damping capacity of the reinforced concrete when the reinforced concrete beam was on bending vibration in the elastic stage. The experimental investigation was carried out to study the relationships among loss tangent,excitation frequency and reinforcement ratio.The experimental results show that the loss tangent of material is decreased with the increasing reinforcement ratio and excitation frequency.The initial decrease is rapid,and then become smooth.In addition,the comparative analysis was done among experimental results,numerical results and theoretical reduction factor.It is found that the theoretical reduction factor is close to measured damping value when the reinforcement ratio is high.However,when the reinforcement ratio is low, there are some deviations between theoretical reduction factor and measured damping value due to ignoring the contribution of plain concrete materials.