UBC Theses and Dissertations
Numerical modeling for the seismic response of concrete tilt-up buildings Tellier, Xavier
Concrete tilt-up building is a prevalent construction technique used for industrial and commercial applications in North America. This construction technique offers many significant advantages over conventional cast-in-place construction. This includes the reduction in construction time and the amount of formworks. Despite the large array of buildings that has been constructed using such technique, the nonlinear behaviour of the concrete tilt-up buildings is still not well understood. The nonlinear behaviour of the concrete tilt-up building has been studied in this thesis. The nonlinear response of the concrete tilt-up building is largely affected by the nonlinear behaviour of the connectors between the panels and the slab, and between the panels. Past researches have been conducted to experimentally examine the nonlinear behaviour of the tilt-up panel connectors. The experimental results were used in this thesis to develop an empirical numerical model capable of reproducing the force-deformation response of the tilt-up connectors under combined axial and shear deformation. The numerical model takes the shear strength and stiffness degradation into account after axial cycles of inelastic deformation. A finite-element software was developed specifically to study the nonlinear static and dynamic behaviour of concrete tilt-up buildings. A typical tilt-up building designed in the study of Olund (2009) was modeled. Incremental dynamic analysis was performed using the developed finite element software to assess the seismic performance of the prototype tilt-up building. The results of the incremental dynamic analysis provided valuable information to understand the nonlinear behaviour of the concrete tilt-up buildings under seismic load. Detailed parametric studies were carried out to examine the nonlinear behaviour of tilt-up buildings. Parameters such as connector configurations; variation of the roof stiffness and strength; and coefficient of friction between the panels and slab were studied.
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