Computational modeling of thermal and shrinkage-induced cracking in concrete

Download

12626290.pdf

Date

2021-3-3

Author

Ghasabeh, Mehran

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

1197
views

633
downloads

This work is concerned with the computational modeling of thermal and shrinkage-induced cracking in concrete. Thermal and hygral gradients develop within concrete structures of varying sizes and aspect ratios due to the intrinsic physicochemical phenomena accompanied by adverse environmental effects. These spatio-temporal gradients invariably result in uneven volumetric deformations that can cause stress concentrations when the concrete is sufficiently rigid. Then, when the gained tensile strength is lower than the principal stresses generated by the non-uniform volume changes, cracks will occur and make concrete structures prone to deleterious environmental effects that can cause consequent destructive durability problems. Therefore, predictive computational models are crucial to conduct crack risk analyses not only during the design stage but also during and after the construction of important concrete structures. For this purpose, we develop multi-field computational models to simulate thermal and shrinkage-induced cracking separately. For the former, we developed a novel chemo-thermo-mechanical model coupled with a quasi-brittle phase-field model where the hydration, thermal, mechanical, and fracture problems are solved in a coupled manner. For the drying shrinkage-induced cracking, we develop a new coupled chemo-hygro-mechanical model within the framework of poro-viscoelasticity to describe the basic and drying creep of concrete in short- and long-terms. The latter model is further supplemented by a cohesive phase-field model to simulate shrinkage-induced cracking. The capabilities of the proposed models are assessed through the benchmark problems and experimental results reported in the literature.

Subject Keywords

Thermal Cracking, Chemo-Thermo-Mechanical Model, Phase-Field Model, Poroviscoelasticity, Shrinkage-Induced Cracking

URI

https://hdl.handle.net/11511/89575

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Computational Methods for Inclined Cracks in Orthotropic Functionally Graded Materials Under Thermal Stresses Dağ, Serkan; TOPAL, SERRA (2013-10-03) This article sets forth two different computational methods developed to evaluate fracture parameters for inclined cracks lying in orthotropic functionally graded materials, that are under the effect of thermal stresses. The first method is based on the J(k)-integral, whereas the second entails the use of the J(1)-integral and the asymptotic displacement fields. The procedures introduced are implemented by means of the finite element method and integrated into a general purpose finite element analysis softw...
Nonlinear Transverse Vibrations of a Beam with Multiple Breathing Edge Cracks Batihan, Ali C.; Ciğeroğlu, Ender (2017-02-02) One step beyond the studies of transverse vibration of beams with a breathing edge crack is the verification of the theoretical crack beam models with an experimental test set up. Beams with a single breathing edge crack can be used as a specimen for the experimental test. However, there is no assurance against the unexpected additional cracks in the specimens, whichmay cause unexpected results. Therefore, in this paper nonlinear transverse vibration of a beam with multiple breathing edge cracks is consider...
Comparison of the Overlapping Lattice and the Finite Element Approaches for the Prediction of the Collapse State of Concrete Gravity Dams Soysal Albostan, Berat Feyza; Arıcı, Yalın; Binici, Barış; Tuncay, Kağan (2017-10-13) Estimating the collapse limit state of concrete gravity dams within the framework of performance based design is challenging due to the uncertainty in modelling the response of these systems and the strong dependence of the behavior on the ground motion. In this context, the purpose of the study is to investigate the prediction capability of numerical tools in determining the collapse state of concrete gravity dams. The first tool used to this end is the classical finite element method with the smeared crac...
Adsorption of gold atoms on anatase TiO2 (100)-1x1 surface Vural, Kıvılcım Başak; Ellialtıoğlu, Süleyman Şinasi; Department of Physics (2009) In this work the electronic and structural properties of anatase TiO2 (100) surface and gold adsorption have been investigated by using the first-principles calculations based on density functional theory (DFT). TiO2 is a wide band-gap material and to this effects it finds numerous applications in technology such as, cleaning of water, self-cleaning, coating, solar cells and so on. Primarily, the relation between the surface energy of the anatase (100)-1x1 phase and the TiO2-layers is examined. After an app...
Overlapping Lattice Simulation of Concrete Gravity Dam Collapse Simulations SOYSAL, BERAT FEYZA; Aydın, Beyazıt Bestami; Tuncay, Kağan; Arıcı, Yalın; Binici, Barış (2017-09-01) Estimating the collapse limit state of concrete gravity dams within the framework of performance based design is challenging due to the uncertainty in modelling the response of these systems and the strong dependence of the behavior on the ground motion. The purpose of the study is to investigate the seismic expected damage levels by using the overlapping lattice modeling (OLM) approach with incremental dynamic analysis (IDA) for two representative dam monoliths. OLM employs pin connected bar elements exten...

Citation Formats

M. Ghasabeh, “Computational modeling of thermal and shrinkage-induced cracking in concrete,” Ph.D. - Doctoral Program, Middle East Technical University, 2021.