Abstract
Under seismic loading, a structure may be subject to simultaneous in-plane and out-of-plane actions. Existing simplified methods like the storey-shear mechanism to determine the shear capacity of masonry structures neglect the out-of-plane effects leading to a non-conservative seismic assessment. In this paper, an analytical model is developed to evaluate the in-plane shear capacities of unreinforced masonry (URM) walls, in the presence of additional out-of-plane displacement. Results from this paper demonstrate that the additional out of displacements alter both the in-plane shear capacity and failure mechanism of the wall. The sensitivity of the interaction to the axial load on the wall is also studied. The proposed model is validated with non-linear finite element analysis. The developed model can be used to determine the reduced shear capacity of URM walls if the mid-height out-of-plane displacement is known. The biaxial interaction of URM walls is also studied dynamically. The model is extended to the framework of the storey-shear mechanism to study the effect of out-of-plane displacements at the global level.
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Kollerathu, J.A., Menon, A. (2019). Biaxial Effects in Unreinforced Masonry (URM) Load-Bearing Walls. In: Rao, A., Ramanjaneyulu, K. (eds) Recent Advances in Structural Engineering, Volume 1. Lecture Notes in Civil Engineering , vol 11. Springer, Singapore. https://doi.org/10.1007/978-981-13-0362-3_21
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DOI: https://doi.org/10.1007/978-981-13-0362-3_21
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