Analytical Seismic Fragility Analyses of Fire Sprinkler Piping Systems with Threaded Joints

Soroushian, Siavash; Zaghi, Arash E.; Maragakis, Manos; Echevarria, Alicia; Tian, Yuan; Filiatrault, André

doi:10.1193/083112eqs277m

Cited by 55 publications

(31 citation statements)

References 13 publications

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“…Two stud/track thicknesses were tested: 0.019 in. (362S125-19 and 362T125- 19), and 0.030 in. (362S125-30 and 362T125-30).…”

Section: Component-level Experimentsmentioning

confidence: 98%

“…For this purpose, a one-dimensional hysteresis load-displacement relationship was defined using the "Pinching4" uniaxial material along with a "zeroLength" element in OpenSees (2014). This material enables the simulation of complex pinched force hysteresis responses accounting for degradations under cyclic loadings (Soroushian et al, 2013). The "Pinching4" material requires the definition of 39 parameters.…”

Section: Analytical Modeling Of Partition Wall Componentsmentioning

confidence: 99%

“…The methodology used by Soroushian et al (2013) was adopted in this study for the calibration process. For each test specimen the hysteresis response, the value of cumulative hysteresis energy, and force histories were used in the calibration process on a visual basis.…”

Section: Analytical Modeling Of Partition Wall Componentsmentioning

confidence: 99%

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Analytical Model for the Seismic Performance of Cold-Formed Steel-Framed Gypsum Partition Walls

Rahmanishamsi¹,

Soroushian²,

Maragakis³

2015

Structures Congress 2015

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Steel-framed gypsum partition walls are comprised of light-gauge coldformed steel studs and tracks, gypsum boards and the screw connections between them. The tracks are also fastened to the structural slab with power-actuated fasteners. Previous experimental studies have shown that the seismic performance of partition walls depends on the force and displacement characteristics of these components. A series of component-level experiments were performed, aiming to investigate both monotonic and cyclic behavior of partition wall components, including gypsum-tostud, stud-to-track, and track-to-slab connections. The experimental data was then utilized to propose and validate a series of nonlinear hinge models for these components in the OpenSees. Subsequently, the hinge models were used in conjunction with the analytical models of gypsum boards and steel studs to develop a comprehensive analytical model for a typical partition wall assembly. The model was calibrated using the available data from a full-scale test on the steel-framed gypsum partition walls.

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“…Two stud/track thicknesses were tested: 0.019 in. (362S125-19 and 362T125- 19), and 0.030 in. (362S125-30 and 362T125-30).…”

Section: Component-level Experimentsmentioning

confidence: 98%

Section: Analytical Modeling Of Partition Wall Componentsmentioning

confidence: 99%

See 1 more Smart Citation

Analytical Model for the Seismic Performance of Cold-Formed Steel-Framed Gypsum Partition Walls

Rahmanishamsi¹,

Soroushian²,

Maragakis³

2015

Structures Congress 2015

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“…9. The numerical modeling techniques, detailed geometric parameters, modeling validation and input motion suites are the same as described in detail in Soroushian et al [2013a]. However, for the completeness this article, they are briefly discussed here.…”

Section: Numerical Simulation Of a Hospital Sprinkler Piping Systemmentioning

confidence: 99%

“…Calculation of inclusive seismic fragility parameters demands the study of diverse geometries of fire sprinkler systems. Considering the geometric and physical limitations of experimental facilities, this goal can only be achieved Downloaded by [Selcuk Universitesi] at 23:48 08 February 2015 FIGURE 9 3-D View of UCSF Medical Center sprinkler piping system [Soroushian et al, 2013a].…”

Section: Numerical Simulation Of a Hospital Sprinkler Piping Systemmentioning

confidence: 99%

Seismic Fragility Study of Displacement Demand on Fire Sprinkler Piping Systems

Soroushian

Zaghi

Maragakis

et al. 2014

Journal of Earthquake Engineering

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Seismic damage to fire sprinkler piping systems is not only caused by inertial forces or interstory drifts, but also by impact with surrounding objects. The collision of constituents of piping systems with nearby objects increases the chance of damage to the piping itself and to adjacent objects. In this study, the probability of seismic damage to fire sprinkler systems due to impact is quantified by obtaining seismic fragility parameters for large diameter pipes passing through walls and floors, as well as small diameter pipes that typically interact with suspended ceilings. The results of two shaking table experiments conducted at the University of Nevada, Reno and E-Defense test facility, and a high-fidelity numerical model of a hospital piping system are used to evaluate the displacement demands. Piping interaction fragility curves are generated based on clearances between adjacent objects and pipes. The probability of piping interactions and damage to piping systems subjected to different levels of peak floor acceleration is compared for different clearances. It is found that the probability of damage due to impact is comparable with the probability of exceeding other limit states, like the leakage in fittings, when a 1 in or 2 in gap is provided around large and small diameter pipes, respectively.

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Component‐level seismic fragility database of suspended piping systems in buildings

Shang,

Tang,

Wang

2024

Earthquake Engineering and Resilience

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Nonstructural components (NSCs) contribute about 80%–90% of the construction investment in a modern public building. The post‐earthquake safety and normal operation of NSCs are necessary to achieve performance‐based design and resilient buildings. The piping system is one of the most essential nonstructural systems to preserve the post‐earthquake functionality of public buildings. To accurately evaluate the seismic performance and vulnerability of piping systems in buildings, a component‐level seismic fragility database is urgently to be developed. System composition, failure modes of piping systems, and induced consequences during previous earthquakes are introduced first in this article. Then a concise description of component‐level fragility methodology suggested by the Applied Technology Council is presented. Seismic fragility database of piping components including pipes, piping joints, and seismic braces through quasi‐static tests are developed based on the fragility analysis method. Experimental results from available literature are summarized and presented in the form of seismic fragility curves. Specific hysteretic curves of these components are also presented, which are used for the calibration of numerical models. In addition, the future research directions on the seismic fragility of piping components are summarized and prospected. The developed component‐level seismic fragility database can be used to help understand the seismic performance and post‐earthquake damage states of the piping system. Seismic performance assessment and seismic fragility analysis of modern piping systems can be conducted using the developed database and numerical simulation method.

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Analytical Seismic Fragility Analyses of Fire Sprinkler Piping Systems with Threaded Joints

Cited by 55 publications

References 13 publications

Analytical Model for the Seismic Performance of Cold-Formed Steel-Framed Gypsum Partition Walls

Analytical Model for the Seismic Performance of Cold-Formed Steel-Framed Gypsum Partition Walls

Seismic Fragility Study of Displacement Demand on Fire Sprinkler Piping Systems

Component‐level seismic fragility database of suspended piping systems in buildings

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