Abstract
Nonlinear finite element analyses (NLFEA) of idealized friction-based modular slab-column connections under simulated gravity and reversed cyclic lateral loading were carried out to numerically examine the performance of friction-based post-tensioned two-way slab-column connections employed in PACE precast modular building systems. The NLFEA were conducted using the commercial software program ABAQUS in an effort to (i) assess the gravity load resisting performance of PACE connections and estimate the controlling modes of failure, (ii) estimate the hysteretic performance of the friction-based slab-column connections under lateral load reversals, and (iii) examine the significance of the slip-friction response contributions of the post-tensioned connections. Based on the numerical results obtained, it was estimated that slip displacements of the friction-based connections did not ultimately control the load capacity of the modular slab system under gravity or lateral loading conditions. Opening and slip displacements at the locations of the connections adjoining the precast slab modules and column were negligible under gravity load levels that far exceeded anticipated service gravity loads. The numerical results also suggest that the friction-based connection relieved stresses within critical concrete and grout slab-column connections regions in a manner that led to an apparent increase in connection ductility under simulated fully reversed cyclic loading.
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Zhou, M., Hrynyk, T., Walbridge, S., Dikic, D., Rutledge, G., Arsenault, M. (2023). Numerical Investigation of the Structural Performance of Post-Tensioned Friction-Based Slab Column Connections in Two-Way Modular Precast Concrete Systems. In: Walbridge, S., et al. Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 . CSCE 2021. Lecture Notes in Civil Engineering, vol 240. Springer, Singapore. https://doi.org/10.1007/978-981-19-0507-0_51
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DOI: https://doi.org/10.1007/978-981-19-0507-0_51
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