Simulating earthquake-induced ductile crack propagation and brittle fracture in steel structures
Abstract/Contents
- Abstract
- Fracture represents a key limit state in evaluating the safety of steel structures subjected to earthquakes. Significant advancements have been recently made in the development of "local" fracture models, which are based on the underlying micromechanics which cause fracture, and predict fracture based on continuum stresses and strains. These models have proven successful at predicting fracture for both monotonic and cyclic loading conditions, under a wide variety of stress states. However, they do not model the physical processes of crack formation and crack growth, which alter the stresses and strains throughout the component as the crack propagates. Motivated by this, a framework was developed and implemented to simulate earthquake-induced ductile crack propagation within a continuum finite element setting. This framework, which combines a local model to predict fracture initiation and a cohesive zone model to simulate the physical process of crack growth, is capable of accurately simulating fracture initiation and subsequent propagation under both monotonic and cyclic loading conditions. Aspects unique to earthquake engineering, such as fracture due to ultra-low cycle fatigue and crack face closure under compressive loading, have been incorporated into the framework. An experimental testing program, consisting of 49 small-scale laboratory experiments, provided the scientific basis upon which the propagation framework was calibrated and validated. A methodology for calibrating the parameters of the various aspects of the framework, critical for widespread adoption, was developed. The propagation framework was proven to successfully simulate crack propagation under both monotonic and cyclic loading conditions in a wide variety of specimens.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2021; ©2021 |
| Publication date | 2021; 2021 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Ziccarelli, Andrew Joseph |
|---|---|
| Degree supervisor | Deierlein, Gregory G. (Gregory Gerard), 1959- |
| Thesis advisor | Deierlein, Gregory G. (Gregory Gerard), 1959- |
| Thesis advisor | Kanvinde, Amit M |
| Thesis advisor | Linder, Christian, (Engineering professor) |
| Degree committee member | Kanvinde, Amit M |
| Degree committee member | Linder, Christian, (Engineering professor) |
| Associated with | Stanford University, Civil & Environmental Engineering Department |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Andrew Ziccarelli. |
|---|---|
| Note | Submitted to the Civil & Environmental Engineering Department. |
| Thesis | Thesis Ph.D. Stanford University 2021. |
| Location | https://purl.stanford.edu/ft563mt0968 |
Access conditions
- Copyright
- © 2021 by Andrew Joseph Ziccarelli
- License
- This work is licensed under a Creative Commons Attribution 3.0 Unported license (CC BY).
Also listed in
Loading usage metrics...