Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/231543
Title: A DAMAGE MECHANICS BASED RANDOM-AGGREGATE MESOSCALE MODEL FOR STRUCTURAL CONCRETE ANALYSIS
Authors: ZHEN NI
Keywords: Mesoscale Model, Random Aggregates' Distribution, Correction Factor, Concrete Damaged Plasticity Model, Concrete Size Effect, Cracking Pattern
Issue Date: 22-Jan-2022
Citation: ZHEN NI (2022-01-22). A DAMAGE MECHANICS BASED RANDOM-AGGREGATE MESOSCALE MODEL FOR STRUCTURAL CONCRETE ANALYSIS. ScholarBank@NUS Repository.
Abstract: This Ph.D. study proposes an innovative mesoscale model integrating the random distribution of the coarse aggregates and the damage mechanics of the mortar and ITZ phase. It ensures the generated random distribution of the coarse aggregates is consistent with the prescribed particle size distribution. The proposed random-aggregate mesoscale model is adopted in the structural analysis of plain concrete under compressive and fracture failure, as well as the steel-concrete-steel (SCS) composite beams under bending. This study also applies a “correction factor” to eliminate the dimensionally dependent mesh sensitivity of the concrete damaged plasticity (CDP) model under fracture failure. The response of the proposed mesoscale model generally agrees with the experimental results, and the simulated cracking pattern is more realistic than the conventional material models for concrete. It can be further applied in the statistical analysis of the concrete structural resistance under different types of loading.
URI: https://scholarbank.nus.edu.sg/handle/10635/231543
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
ThesisZhenNi.pdf5.89 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

13
checked on Nov 17, 2022

Download(s)

1
checked on Nov 17, 2022

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.