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Numerical Assessment of CFS-SWP with Different Door Opening Positions

Rouaz Idriss, Rafa Sid Ali, Ghribi Zakaria

Inżynieria Mineralna

2024

Vol. 1, no. 2

art. no. 21

A prevalent method of countering lateral forces in seismic regions for structures made of Cold Formed Steel (CFS) involves employing Shear Walls Panels (SWP) covered with steel sheets. The overall reaction and various failure modes during lateral loading have become apparent, continuing to capture the interest of designers and researchers. Typically, door openings are everpresent in the front and rear elevations where SWPs find their optimal position to ensure lateral stability in CFS structures. These architectural design features translate into reduced areas for lateral load resistance throughout the structure. Through numerical simulations, this paper discusses the effect of the door opening, with different positions in the SWP, on the shear strength performance of CFS-SWP. A Finite Element (FE) modelling is developed using the ABAQUS software, taking into account material and geometrical nonlinearities, as well as assembled sheathing-to-framing connections. In order to validate the FE modelling with available experimental data, comprehensive static nonlinear analyses are conducted on CFS-SWP under monotonic load. A good agreement is achieved, namely: nonlinear strength-displacement response, ultimate shear strength, and failure modes. The effect of the door positions is assessed, in which, the opening position is found to have a significant impact on the CFS-SWP performance. The results reveal that the position of the door opening between the central and the edge of the SWP produces better performance than the other positions. However, the position of the door at the edge of the SWP induces additional failure modes in the vicinity of the chord studs.

Effect of Shear Walls Length on the Behavior of Reinforced Concrete Structures

Rafa Sid Ali, Rouaz Idriss, Brahim Mounia Hadj, Ghribi Zakaria

Inżynieria Mineralna

2024

Vol. 1, no. 2

art. no. 02

On May 21, 2003, a powerful earthquake with a moment magnitude of Mw=6.8 struck the city of Boumerdes, which is located roughly 50 km east of Algiers, the capital city of Algeria. 2,278 people lost their lives as a result of the earthquake, which also caused several buildings and infrastructures to collapse. Structures with reinforced concrete (R/C) frames did not withstand the earthquake, according to post-seismic observations. In order to reduce risks related to this type of construction, the revised version of the Algerian Seismic Code (RPA 99 Version 2003) restricted the use of RC frame structures to two-story buildings or structures that were eight meters or taller. Over this threshold, shear walls must either fully or partially resist the earthquake loads. To comply with this new requirement, engineers adopted a new construction system by using small length shear walls arranged in Lshape at the corners of the building. In order to assess the efficiency of this shear walls configuration, a series of numerical analysis has been performed using the finite element method where the shear walls length was varied from 0.60 m to 2.00 m. For the purpose of this study a typical three-story building constructed in Algeria's most seismically active region, Algiers and the surrounding area, has been selected for this investigation.