文献类型：期刊文献

英文题名：Relationship between internal viscous damping and stiffness of concrete material and structure

作者：Liang, Chaofeng[1,2];Xiao, Jianzhuang[1];Wang, Yuanfeng[3];Wang, Chunhui[1];Mei, Shengqi[3,4]

机构：[1]Tongji Univ, Dept Struct Engn, Shanghai 200092, Peoples R China;[2]Shaoxing Univ, Sch Civil Engn, Shaoxing, Peoples R China;[3]Beijing Jiaotong Univ, Sch Civil Engn, Beijing, Peoples R China;[4]Shijiazhuang Tiedao Univ, Sch Civil Engn, Shijiazhuang, Hebei, Peoples R China

年份：2021

卷号：22

期号：3

起止页码：1410

外文期刊名：STRUCTURAL CONCRETE

收录：SCI-EXPANDED(收录号：WOS:000634279900001)、、EI(收录号：20211310130680)、Scopus(收录号：2-s2.0-85102963137)、WOS

基金：National Natural Science Foundation of China, Grant/Award Number: 51661145023; Natural Science Foundation of Zhejiang Province, Grant/Award Number: LY20E080012

语种：英文

外文关键词：damping suspension test; energy dissipation capacity; stiffness; vibration‐ amplitude attenuation coefficient; viscous damping

外文摘要：This study focuses on the relationship between the internal viscous damping and the stiffness of concrete material and structure having small deformation amplitude. New damping parameters were proposed to describe the energy dissipation capacity and the vibration-amplitude attenuation rate. An improved damping suspension test method for predicting the essential material parameters, elasticity modulus and loss modulus, was developed and validated. The results show that the viscous damping energy dissipation capacity of concrete material and structure having small deformation amplitude is proportional to the product of the loss factor and the stiffness, and the vibration-amplitude attenuation rate is proportional to the product of the damping ratio and the natural frequency. The variation in dimensionless damping mainly results from the change in the stiffness of concrete material and structure. The porosity shows the smallest elasticity modulus and the largest energy dissipation capacity of nano-phase in cement paste under constant loading conditions. The improved damping suspension test method is proposed based on theoretical analysis and is validated using an experiment and finite element analysis.