Effects of the staircase on the dynamic behavior of a 7-story reinforced concrete structure
DOI:
https://doi.org/10.55204/trc.v5i2.e560Keywords:
Reinforced concrete, stairs, seismic behavior, structural rigidity, torsionAbstract
Introduction: Reinforced concrete is essential in construction due to its combined strength of concrete and steel. Concrete stairs, as an integral part of the structure, can significantly modify seismic behavior by altering rigidity and generating torsion.
Objective: To analyze the influence of reinforced concrete stairs and their supporting beam on the seismic response of a seven-story building, comparing three structural configurations.
Methods: Numerical simulations were conducted for three structural configurations: without stairs (M1), with stairs and a beam (M2), and with stairs, beam, and shear wall (M3), evaluating dynamic parameters such as vibration, excentricity, and drifts.
Results: The M2 model showed higher rigidity but also higher torsional excentricity. The M3 model, with the shear wall, reduced excentricity and improved seismic performance, meeting the regulatory limits.
Conclusions: The inclusion of rigidly connected stairs increases rigidity but can generate torsional irregularities. A shear wall helps mitigate these effects, improving the seismic stability of the structure.
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Copyright (c) 2025 Jennifer Elizabeth Pino-Arguello, Raúl Alexis Salazar-Flores, Marcelo David Guerra-Valladares, Alexis Iván Andrade-Valle
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