File(s) under embargo
Reason: Because a Patent for the Design apporach (or method) for Reinfoced Concrete Panels was developed in this Thesis.
until file(s) become available
DESIGN APPROACH FOR RC PANELS (SHELLS) IN INDUSTRIAL FACILITIES BASED ON ACI CODES
Reinforced Concrete (RC) wall and shell type structures such as those used in safety-related nuclear facilities, offshore structures, and other industrial facilities are designed following the Element-by-Element Level (ELD) deign method. In such structures, which are over labyrinthine in plan, the RC walls can be extremely long and interconnected to several other walls. It is impossible to distinguish and design the walls as independent shear walls or units. Consequently, these structures are analyzed using 3D finite element models, and the demands obtained from such analyses are used to design the walls. While the demands are obtained on an element-by-element level, they can be averaged over finite lengths defined by a (two-dimensional, 2D) RC panel in order to account for the spread of yielding when ductile limit states govern behavior.
The design demands of
RC panels are a combination of in-plane and out-of-plane forces/moments, which
interact simultaneously. The ACI 349 and the ACI 318.2-19 codes, do not provide
clear design guidance for RC panels, and for this reason, a new design approach
consistent with the behavioral assumptions in these ACI codes are developed and proposed in this
thesis. The results of this ACI-Panel-Based-Design-Approach (PACI) are verified
using experimental results from twenty-one RC panel tests subjected to
different combinations of in-plane and out-of-plane forces and moments as
follows: (i) The PACI approach is used to calculate the
required reinforcement areas for these specimens. (ii) Benchmarked numerical
models are developed for the specimens with the PACI suggested reinforcement.
(iii) Numerical models are analyzed for the same loading conditions and
combinations as the tested specimens, and the calculated capacities are
compared with those from the tests. The results of the PACI approach are
also compared with those obtained using the more mechanistic “sandwich” model
approach referenced in the Eurocode for RC shells (or panels). Finally, the use,
safety, and efficiency of the PACI approach and Eurocode approach are
illustrated by designing the critical wall panels of a nuclear structure with
design demands published in the literature.