Study of story drift limits in steel buildings subjected to seismic forces

Andrés F. Robalino, Santiago R. Zaruma, Telmo A. Sánchez

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Resumen

Traditionally, the design of steel buildings for seismic forces initiates by the definition of the lateral force resistant system (LFRS) and the dimensioning of its components for the strength limit states. In addition, construction codes require to limit the inter-story drift to values that commonly range between 1% and 2.5% of the story height. This requirement usually controls the LFRS's design in configurations in which the story lateral rigidity depends on the combination of flexural and axial deformations of the structural components, such as in steel moment frames. In general, drift control is meant to limit the damage in nonstructural components of buildings that could pose a threat to life and to limit lateral displacements and inelastic strains to admissible values, so that the structure remains stable during a seismic event. This paper presents studies conducted to determine the reasonableness of inter-story drift limits specified in different construction codes around the world. Studies are focused on steel moment frames that include the lateral stiffness contribution of nonstructural components, such as division walls and facades. As a result of the study, new criteria for establishing drift limits in steel buildings are proposed, considering the structural integrity of the building and limiting nonstructural damage during a seismic event.

Idioma originalInglés
EstadoPublicada - 2020
Publicado de forma externa
Evento2020 Annual Stability Conference Structural Stability Research Council, SSRC 2020 - Atlanta, Estados Unidos
Duración: 21 abr. 202024 abr. 2020

Conferencia

Conferencia2020 Annual Stability Conference Structural Stability Research Council, SSRC 2020
País/TerritorioEstados Unidos
CiudadAtlanta
Período21/04/2024/04/20

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