- Title
- Seismic assessment of in-plane shear loaded unreinforced masonry walls with openings
- Creator
- Allen, Clive
- Relation
- University of Newcastle Research Higher Degree Thesis
- Resource Type
- thesis
- Date
- 2019
- Description
- Research Doctorate - Doctor of Philosophy (PhD)
- Description
- This thesis presents the results of an extensive experimental testing programme of twelve full-scale unreinforced masonry walls with openings subject to in-plane cyclic shear loading in order to simulate seismic loading on in-plane walls typical of Australian unreinforced masonry construction. The walls tested in this study consist of a single leaf of clay brick masonry with a 1:1:6 (Cement: Lime: Sand by volume) mortar. Steel equal angle lintels are used to support the masonry above the wall openings. The twelve wall tests consist of three wall geometry types, two levels of axial precompression, and two repeats of each test. Detailed analysis of the experimental test results is included in this study, and digital image correlation is used to provide detailed insights in to the progression of damage observed during the experimental testing cyclic load histories. Key in-plane wall response parameters for each of the wall tests are obtained from the experimental test results. Detailed material characterisation tests were undertaken during the experimental testing programme to allow for detailed finite element analyses of these wall tests to be undertaken. The experimental test results are replicated using a crack-shear-crush micromodelling approach. Macromodelling of these walls using a total-strain fixed-crack strategy is also undertaken and a sensitivity analysis is undertaken with respect to masonry compressive strength, tensile strength, and elastic modulus. This total-strain fixed-crack macromodelling approach is then extended to replicate a previous experimental study of a two-storey half-scale unreinforced masonry wall subject to in-plane cyclic loads previously tested by the University of Auckland and a sensitivity analysis of the results of this study is undertaken with respect to masonry tensile strength and elastic modulus. Finally, the total-strain fixed-crack macromodelling strategy is extended to replicate the severe damage which was sustained to a three-storey unreinforced masonry building: Avonmore House in the February 22nd 2011 Christchurch earthquake. This is achieved through the use of nonlinear static analyses and then a sensitivity analysis with respect to floor diaphragm stiffness, masonry compressive strength, and masonry tensile strength is undertaken.
- Subject
- unreinforced masonry; structural engineering; earthquake engineering; experimental testing; finite element modelling; seismic assessment
- Identifier
- http://hdl.handle.net/1959.13/1407970
- Identifier
- uon:35798
- Rights
- Copyright 2019 Clive Allen
- Language
- eng
- Full Text
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| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | ATTACHMENT01 | Thesis | 27 MB | Adobe Acrobat PDF | View Details Download | ||
| View Details Download | ATTACHMENT02 | Abstract | 1 MB | Adobe Acrobat PDF | View Details Download |