- Title
- Spatial Variability and Structural Reliability of Unreinforced Masonry Walls in Vertical Bending
- Creator
- Li, Jie; Masia, Mark J.; Stewart, Mark G.; Lawrence, Stephen J.; Heffler, Leesa
- Relation
- 12th Canadian Masonry Symposium. Proceedings of the 12th Canadian Masonry Symposium (Vancouver, British Columbia 02-05 June, 2013)
- Publisher
- British Columbia Institute of Technology (BCIT), School of Construction and the Environment
- Resource Type
- conference paper
- Date
- 2013
- Description
- The flexural bond strength of individual units in unreinforced masonry (URM) walls is a key material property affecting the wall out of plane lateral load capacity. It is well known that the unit flexural bond strength varies considerably between units, and that this spatial variability might significantly affect the structural performance and reliability of URM walls in flexure. Therefore, it is very important to consider the unit to unit spatial variability when calculating strength prediction and structural reliability for a URM wall subject to lateral loads. The present paper develops a computational method to calculate the stochastic strength prediction and structural reliability for unreinforced masonry walls subject to one-way vertical bending considering unit to unit spatial variability of flexural bond strength. We make use of 3-D nonlinear Finite Element Analysis Methods and stochastic analysis in the form of Monte Carlo simulations. The strengths of URM walls are calculated by FEA models with varying COVs (0.1, 0.3 and 0.5) of unit bond strength. The mean and variance of wall strength are estimated to show the effect of variability of flexural bond strength on wall strength. The probabilities of failure for spatial and non-spatial bond strength are calculated to illustrate the importance of considering spatial variability in a structural reliability analysis for URM walls.
- Subject
- stochastic; masonry; bond strength; spatial variability; structural reliability; flexure
- Identifier
- http://hdl.handle.net/1959.13/1294924
- Identifier
- uon:18906
- Language
- eng
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