文献类型：期刊文献

英文题名：Damping of rubberized recycled aggregate concrete and damping estimation of its elements by finite element analysis

作者：Liang, Chaofeng[1,2];Fu, Yangyan[1];Wang, Chunhui[3];Gao, Yueqing[1];Zhao, Jiangxia[1]

机构：[1]Shaoxing Univ, Sch Civil Engn, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China;[2]Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China;[3]Harbin Univ Technol, Sch Civil & Environm Engn, HIT Campus Univ Town Shenzhen, Shenzhen 518055, Guangdong, Peoples R China

年份：2022

卷号：281

外文期刊名：COMPOSITE STRUCTURES

收录：SCI-EXPANDED(收录号：WOS:000740517500004)、、EI(收录号：20214811238255)、Scopus(收录号：2-s2.0-85119896408)、WOS

基金：The authors would like to acknowledge the financial supports of the Natural Science Foundation of Zhejiang Province, PR China (LY20E080012).

语种：英文

外文关键词：Rubberized recycled aggregate concrete; High-damping material; Nonlinear damping; Strain-energy dissipation function; Finite element analysis (FEA); Transmission ratio

外文摘要：Concrete structures inevitably suffer from dynamic loadings, causing damage and uncomfortable vibration. Improving the damping of concrete to passively absorb the vibration energy is beneficial to mitigate the hazards and improve comfort. However, at least two challenges must be completed before applying this strategy, namely, preparing effective energy dissipating concrete and estimating the damping parameter of its elements and structures. In this study, rubberized recycled aggregate concrete (RRAC), prepared with coarse recycled concrete aggregate (RCA) and recycled rubber aggregate (RRA) instead of natural aggregate, is experimentally validated to show higher damping. Besides, a universal function of energy dissipation over strain amplitude is established for concrete containing natural aggregate, RCA, and RRA. Based on the found strain-energy dissipation function and finite element analysis, an iterative method of estimating the inner damping ratio of RRAC elements from the material damping is proposed and validated. Through the proposed method, the effects of loading amplitude, loading frequency, and stress history on the nonlinear damping behaviors of RRAC beams are numerically analyzed. The experiment result and the proposed damping determination method can encourage the application of recycled building materials in structural engineering, especially in projects with requirements of vibration control.