A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
In-Plane Flexibility of Reinforced Concrete Floor Diaphragms with Openings
There is a lack of discussion in the most recent building codes such as ACSE 7-10 and ACI 318-14 and the most recent committee documents such as ACI 369.1 and ASCE/SEI 41 regarding the effect of the floor openings on in-plane behavior of low-rise reinforced concrete (RC) buildings with long and narrow plans. Results of this paper emphasizes the importance of the stated problem by indicating that the flexible in-plane behavior in such low-rise buildings where the lateral resistance is provided by the end shear walls is likely. Building macro-models using ETABS, capable of simulating the flexible (semi-rigid) behavior of concrete floor diaphragms using shell elements, were created for such buildings to evaluate the effect of the openings on the response of the building to seismic loads. Results show that this behavior (floor flexibility) is more pronounced even when small openings are present at the center panels of the floor diaphragm, where floor flexibility places excessive demands (deflection and stress) on floor panels with opening. Additionally, based on the nonlinear finite element analysis of floor panels with openings (micro-model), it is shown that openings can significantly reduce in-plane load-carrying capacity of slab panels, thus, new recommendations are presented to improve the in-plane capacity of RC slabs with openings.
In-Plane Flexibility of Reinforced Concrete Floor Diaphragms with Openings
There is a lack of discussion in the most recent building codes such as ACSE 7-10 and ACI 318-14 and the most recent committee documents such as ACI 369.1 and ASCE/SEI 41 regarding the effect of the floor openings on in-plane behavior of low-rise reinforced concrete (RC) buildings with long and narrow plans. Results of this paper emphasizes the importance of the stated problem by indicating that the flexible in-plane behavior in such low-rise buildings where the lateral resistance is provided by the end shear walls is likely. Building macro-models using ETABS, capable of simulating the flexible (semi-rigid) behavior of concrete floor diaphragms using shell elements, were created for such buildings to evaluate the effect of the openings on the response of the building to seismic loads. Results show that this behavior (floor flexibility) is more pronounced even when small openings are present at the center panels of the floor diaphragm, where floor flexibility places excessive demands (deflection and stress) on floor panels with opening. Additionally, based on the nonlinear finite element analysis of floor panels with openings (micro-model), it is shown that openings can significantly reduce in-plane load-carrying capacity of slab panels, thus, new recommendations are presented to improve the in-plane capacity of RC slabs with openings.
In-Plane Flexibility of Reinforced Concrete Floor Diaphragms with Openings
Khajehdehi, R. (author) / Panahshahi, N. (author) / Ghaffari, R. (author)
Structures Congress 2018 ; 2018 ; Fort Worth, Texas
Structures Congress 2018 ; 243-250
2018-04-17
Conference paper
Electronic Resource
English
In-Plane Flexibility of Reinforced Concrete Floor Diaphragms with Openings
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