结构工程师2025，Vol.41Issue(4)：111-121,11.DOI:10.15935/j.cnki.jggcs.20241120.001
含粉煤灰陶粒高延性水泥基复合材料研发与有限元模拟
Development and Finite Element Simulation Analysis of Engineered Cementitious Composites with Fly Ash Cold-Bonded Aggregate
董智福 1谭海龙 1余江滔1
作者信息
- 1. 同济大学防灾减灾工程系,上海 200092
- 折叠
摘要
Abstract
This study investigates the influence of fly ash cold-bonded aggregate(FCA)particle size on the mechanical properties of coarse aggregate-engineered cementitious composites(CA-ECC).Uniaxial compression and tensile tests demonstrate that CA-ECC maintains high tensile strain capacity.Specifically,CA8-ECC with FCA particle sizes of 5 to 8 mm achieves a tensile deformation of 11%.Mesoscopic and microscopic analyses reveal that cracks undergo deflection and bifurcation at aggregate interfaces,forming denser crack patterns than conventional ECC.A mesoscopic numerical model based on random aggregate distribution was established to simulate crack propagation,and its reliability was validated by experimental data.Finite element analysis indicates that small-size aggregates distributed in the matrix promote damage extension,enabling sufficient development of matrix microcracks.Furthermore,stress distribution analysis under loading confirms that optimal interfacial properties,appropriate aggregate elastic modulus,and controlled particle size are prerequisites for ensuring the high deformation capacity of CA-ECC.关键词
粗陶粒/高延性水泥基复合材料/应变-硬化/随机陶粒模型/数值分析Key words
coarse aggregate/engineered cementitious composites(ECC)/strain-hardening/random aggregate model/finite element analysis分类
建筑与水利引用本文复制引用
董智福,谭海龙,余江滔..含粉煤灰陶粒高延性水泥基复合材料研发与有限元模拟[J].结构工程师,2025,41(4):111-121,11.
