- Title
- Out-of-plane behaviour of semi-interlocking masonry infill panels
- Creator
- Zarrin, Orod
- Relation
- University of Newcastle Research Higher Degree Thesis
- Resource Type
- thesis
- Date
- 2021
- Description
- Research Doctorate - Doctor of Philosophy (PhD)
- Description
- Masonry is one of the most common construction materials used in buildings worldwide. Evolution through the centuries has changed the usage of masonry from massive structural walls, which work mainly in compression, to more slender walls that could also experience tension and shear. Traditional slender masonry does not possess sufficient tension and shear capacity to guarantee survival in earthquake excitation. To overcome this deficiency, different materials and methods have been used. In a frame structure, for example, masonry panels are combined with a ductile frame made of reinforced concrete or steel. This method became popular because of its economical and practical aspects. However, the energy dissipated in traditional framed masonry structures occurs mainly through damage to the frame and infill panels, accompanied by stiffness reduction. This damage could be potentially unsafe and costly to repair. In order to avoid or significantly minimize the damage while improving the energy dissipation, a new masonry infill panel system made of Semi-Interlocking Masonry (SIM) units (bricks) has been developed in the Masonry Research Group at The University of Newcastle. This new masonry system aimed to improve the seismic performance of framed structures by increasing frictional energy dissipation in the masonry panel during cyclic in-plane displacements. Courses of unbonded SIM units in these panels are capable of sliding in-plane of the panel but prevented against relative sliding in the out-of-plane direction. As a result, the SIM infill panels have reduced in-plane stiffness but increased frictional energy dissipation capacity and displacement ductility compared to traditional masonry panels. A number of testing programs have been carried out to evaluate the in-plane capacity of different framed masonry panels. However, there has only been one out-of-plane test on SIM panels. In this thesis, experimental and numerical studies were conducted to investigate the out-of-plane behaviour of SIM panels. The results show that the SIM panels have sufficient out-of-plane load and displacement capacities to be an alternative to traditional masonry panels in seismic regions. In the experimental section, the out-of-plane displacement/load capacity of the SIM panels has been investigated. The tested panels were damaged in previous in-plane tests. Two full-scale SIM panels were tested, one made using topological interlocking units and the other using mechanical interlocking units. The panels were 1980x2025 mm (length x height) respectively, and 110 mm thick, with full contact to the frame. A lateral load was applied in the middle of the panel through an octagonal steel plate by a hydraulic jack. The load and displaced shape of the panels were monitored and recorded at regular displacement increments. The results show that the SIM panels have significant out-of-plane load and displacement capacity. In the numerical part, a Finite Element (FE) and work method of a SIM panel have been developed to simulate the out-of-plane deflection under a lateral load. The results of FE simulation using DIANA software were calibrated against experimental results. The two FE simulations achieved a close correlation between work method model and experimental results to evaluate the out-of-plane behaviour of the SIM panels.
- Subject
- masonry; out-of-plane; semi-interlocking masonry; stiffness; framed masonry structures; load/displacement capacity
- Identifier
- http://hdl.handle.net/1959.13/1468482
- Identifier
- uon:48055
- Rights
- Copyright 2021 Orod Zarrin
- Language
- eng
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| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | ATTACHMENT01 | Thesis | 11 MB | Adobe Acrobat PDF | View Details Download | ||
| View Details Download | ATTACHMENT02 | Abstract | 542 KB | Adobe Acrobat PDF | View Details Download |