Study of Combined Multi-Point Constraint Multi-Scale Modeling Strategy for Ultra-High-Performance Steel Fiber-Reinforced Concrete Structures

Autor: Jun Teng, Zuohua Li, Peng Zhihan
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Computer science
ultra-high-performance steel fiber-reinforced concrete
0211 other engineering and technologies
020101 civil engineering
02 engineering and technology
Fiber-reinforced concrete
Degrees of freedom (mechanics)
Plasticity
multiscale finite element modeling
lcsh:Technology
Displacement (vector)
Article
0201 civil engineering
law.invention
Stress (mechanics)
law
Simultaneous equations
021105 building & construction
General Materials Science
multi-point constraint
lcsh:Microscopy
lcsh:QC120-168.85
lcsh:QH201-278.5
business.industry
lcsh:T
concrete damage plasticity model
Structural engineering
Finite element method
lcsh:TA1-2040
lcsh:Descriptive and experimental mechanics
lcsh:Electrical engineering. Electronics. Nuclear engineering
multi-scale interface connection
ABAQUS
business
lcsh:Engineering (General). Civil engineering (General)
Scale model
lcsh:TK1-9971
Zdroj: Materials
Volume 13
Issue 23
Materials, Vol 13, Iss 5320, p 5320 (2020)
ISSN: 1996-1944
DOI: 10.3390/ma13235320
Popis: Compared with normal strength concrete (NSC), ultra-high-performance steel fiber-reinforced concrete (UHPFRC) shows superior performance. The concrete damage plasticity (CDP) model in ABAQUS can predict the mechanical properties of UHPFRC components well after calibration. However, the simulation of the whole structure is seriously restricted by the computational capability. In this study, a novel multi-scale modeling strategy for UHPFRC structure was proposed, which used a calibrated CDP model. A novel combined multi-point constraint (CMPC) was established by the simultaneous equations of displacement coordination and energy balance in different degrees of freedom of interface nodes. The advantage is to eliminate the problem of the tangential over-constraint of displacement coordination equation at the interface and to avoid stress iteration of the energy balance equation in the plastic stage. The expressions of CMPC equations of typical multi-scale interface connection were derived. The multi-scale models of UHPFRC components under several load cases were established. The results show that the proposed strategy can well predict the strain distribution and damage distribution of UHPFRC while significantly reducing the number of model elements and improving the computational efficiency. This study provides an accurate and efficient finite element modeling strategy for the design and analysis of UHPFRC structures.
Databáze: OpenAIRE
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