Title:
Performance and Design of Carbonated Recycled Aggregate Concrete Shear Wall Based on Multiscale Tests and Simulations (Prepublished)
Author(s):
Wenwei Lin, Rui Hu, Feng Xing, and Yingwu Zhou
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
accelerated carbonation treatment; constitute model; finite element method; mesoscopic model; recycled aggregate; shear wall seismic performance
DOI:
10.14359/51749303
Date:
11/6/2025
Abstract:
Accelerated carbonation treatment is recognized as an effective method for enhancing recycled aggregates (RA), but its potential in structural concrete, particularly with respect to seismic performance, remains underexplored. To address this gap, this study is the first to integrate mesoscale modeling with structural finite element analysis (FEA) to systematically investigate the seismic behavior of carbonated recycled aggregate concrete (CRAC) shear walls under dynamic loading. At the material scale, uniaxial compression tests on CRAC cylindrical specimens with varying replacement ratios were conducted to evaluate their stress–strain behavior and mechanical properties. A mesoscale model of CRAC was developed using a random aggregate placement method, and FEA was employed to extend the analysis of replacement ratios. At the structural scale, a CRAC shear wall FEA model was established, incorporating the material-level stress–strain relationships into cyclic lateral loading simulations. Parametric analysis revealed that increasing both the axial load ratio and the replacement ratio significantly reduced the seismic performance of CRAC shear walls, with a maximum reduction of 21.7%. Based on these findings, recommended ranges for RA replacement ratios and axial load ratios are proposed, providing practical guidance for the structural application of CRAC.