Analytical model for the in‐plane seismic performance of cold‐formed steel‐framed gypsum partition walls

Rahmanishamsi, Esmaeel; Soroushian, Siavash; Maragakis, Emmanuel M.

doi:10.1002/eqe.2676

Cited by 18 publications

(31 citation statements)

References 26 publications

(55 reference statements)

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“…The experimental fragility curves developed in this study use GSC displacement as the engineering demand parameter. The hinge model of the GSCs could be utilized along with the numerical models of other wall components (such as track-to-stud connections and steel studs) to develop a comprehensive numerical model of a partition wall system (Rahmanishamsi et al 2015). The partition wall model could then be subjected to realistic input motions (e.g., floor accelerations) to estimate the demand parameters on each component.…”

Section: Discussionmentioning

confidence: 99%

Cyclic Shear Behavior of Gypsum Board-to-Steel Stud Screw Connections in Nonstructural Walls

Rahmanishamsi

Soroushian²,

Maragakis

2016

Earthquake Spectra

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Gypsum steel-stud partition walls are composed of light-gauge, cold-formed steel studs, and gypsum boards attached with self-drilling screws. Previous experimental studies on the seismic performance of these walls have shown widespread failure of gypsum-to-stud connections (GSCs), initiated at very low amplitude excitation. The failure of GSCs resulted in loss of strength and stiffness of the partition walls. A series of component tests has been conducted at University of Nevada, Reno to evaluate the shear force and displacement capacities of GSCs. Fastener spacing (center to center and also center to edge), loading protocol (monotonic or cyclic), and stud thickness were varied between specimens. The test data were then used to develop fragility curves for shear capacities of GSCs in terms of displacements. Additionally, a series of nonlinear GSC hinge models were proposed and validated using component experimental data.

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Section: Discussionmentioning

confidence: 99%

Cyclic Shear Behavior of Gypsum Board-to-Steel Stud Screw Connections in Nonstructural Walls

Rahmanishamsi

Soroushian²,

Maragakis

2016

Earthquake Spectra

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“…The hinge model of stud-to-track connections could be utilized along with the numerical models of other wall components (such as gypsum-to-stud connections and steel studs) to numerically model the in-plane and out-of-plane behavior of a partition wall assembly [31].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the out-of-plane behavior of stud-to-track connections in nonstructural partition walls

Rahmanishamsi

Soroushian

Maragakis

2016

Thin-Walled Structures

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A series of component-level experiments have been performed aiming to characterize the out-of-plane force-displacement response and damage mechanisms of stud-to-track connections in nonstructural steel-framed partition walls. The performance of connections with various stud-to-track gap dimensions, stud and track thicknesses, and screw-attachment configurations were evaluated and compared. In addition, the accuracy of available design provisions for estimating the ultimate connection capacity was assessed. The experimental data was then used to generate capacity fragility curves in terms of displacement and force. Finally, a series of nonlinear numerical hinge models were developed and calibrated that represent the out-of-plane hysteresis behavior of stud-to-track connections.

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“…(a) EPPG material properties (OpenSees, 2020). (b) Gypsum-to-concrete contact elements (Rahmanishamsi et al, 2016). …”

Section: Modeling Methodologymentioning

confidence: 99%

Generation of numerical-based capacity fragility curves for different aspect ratios of full-connection gypsum partition walls

et al. 2022

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Fragility curves for steel-framed partition walls in current guidelines (such as FEMA P-58) are mainly based on experimental studies with limited number of geometries. In light of extensive efforts made in the past decade on numerical simulation of these walls, combined experimental–numerical fragility curves can facilitate more reliable results. A previously validated modeling approach along with verified numerical-based fragility development methodology utilized to derive fragility curve for walls with aspects ratios ranging from 0.33 to 3 using OpenSees platform. Moreover, variation of maximum and median wall strengths as well as median fragility values were compared against different wall aspect ratios. Results of this article indicated that the maximum unit-length strength of full-connection partition walls fluctuates between 3.5 and 4.9 kN (0.25–0.34 kips). Also, vulnerability of partition walls increases when aspect ratio of walls decreases.

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Analytical model for the in‐plane seismic performance of cold‐formed steel‐framed gypsum partition walls

Cited by 18 publications

References 26 publications

Cyclic Shear Behavior of Gypsum Board-to-Steel Stud Screw Connections in Nonstructural Walls

Cyclic Shear Behavior of Gypsum Board-to-Steel Stud Screw Connections in Nonstructural Walls

Evaluation of the out-of-plane behavior of stud-to-track connections in nonstructural partition walls

Generation of numerical-based capacity fragility curves for different aspect ratios of full-connection gypsum partition walls

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