Dynamic characteristics and seismic behavior of prefabricated steel stairs in a full‐scale five‐story building shake table test program

Wang, Xiang; Astroza, Rodrigo; Hutchinson, Tara C.; Conte, Joseph Le; Restrepo, José I.

doi:10.1002/eqe.2595

Cited by 13 publications

(8 citation statements)

References 16 publications

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“…The use of different SID methods provides intramethod and intermethod comparisons to evaluate the consistency of the estimated modal parameters as well as the robustness of these methods when their underlying assumptions are not strictly satisfied (e.g., linear time-invariant system, broadband excitation, and stationary response). These methods have been successfully implemented in the SID studies of large-scale structures in previous shake table experiments (e.g., other studies [19][20][21][22][23] ). Discussion of the theoretical background and implementation details of these SID methods is outside of the scope of this paper.…”

Section: Methods and Proceduresmentioning

confidence: 99%

“…The limitations of data recorded on structures with real damage have been overcome by recent shake table experiments of large-scale (or full-scale) structures. Such experimental programs have provided unique datasets for understanding the evolution of dynamic characteristics and the damage progression of various structural systems and nonstructural components under extreme loading scenarios (e.g., other studies [19][20][21][22][23] ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evolution of modal characteristics of a mid‐rise cold‐formed steel building during construction and earthquake testing

Wang

Hutchinson

2020

Earthq Engng Struct Dyn

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Section: Methods and Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evolution of modal characteristics of a mid‐rise cold‐formed steel building during construction and earthquake testing

Wang

Hutchinson

2020

Earthq Engng Struct Dyn

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“…[ 4–6 ] Other research based on laboratory tests with full‐scale steel structures on shaking tables warns that current stairways are sensitive to lateral displacements and highly susceptible to damage or collapse when subjected to earthquakes. [ 7,8 ] Recent articles confirm the need to improve the structural safety of stairs [ 9 ] and investigate new solutions. [ 10 ] Some articles have presented comparative studies of the structural behavior of reinforced concrete (RC) buildings with or without considering stairs in the analysis.…”

Section: Introductionmentioning

confidence: 99%

Special braced stairs versus typical braced frames. New architectural‐structural‐seismic approach to stair design

Turon

Alzate

2023

Structural Design Tall Build

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This paper presents a new approach to the project of steel buildings, mainly focused on the architectural, structural, and seismic design of stairs. The objective is to design a structural stair system capable of controlling seismic damage and contributing to the bracing system of the building. The article begins with a review of the seismic standard (ATC, FEMA, and EC8) on which the current design criteria for new buildings with stairs are based. The research is based on two spatial building models (A-B) with the same bracing elements but placed differently. Reference Model A follows classical design approaches. It means, stairs are considered nonstructural elements that do not influence the seismic behavior of the building. This structure corresponds to typical braced frames (IV-CBF and EBF) according to EC8. Model B includes a stair system designed to help control the effects of inter-story drifts and inertia forces. In this case, the same bracing elements of Model A were integrated into the stair structure of Model B. A comparative seismic behavior analysis of typically braced frames (A) versus specially braced stairs (B) is presented. The research was based on the static nonlinear (pushover) analysis and the capacity spectrum method (ATC-40) according to the seismic performance levels (FEMA) and damage limitation (EC8).Finally, the braced stairs was verified via nonlinear time-history analysis in order to better capture the structural safety of the evacuation routes and their influence on the behavior of the building. This deterministic analysis of the braced stairs verified satisfactory results compared to reference bracing systems.

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“…The straining actions and the layer displacement angles are decreased gradually with the increase of the structure height [9][10][11]. On the other hand, the existence of a staircase can produce high torsional eccentricities and attract large seismic loads, leading to the failure of supporting elements such as columns and landing beams [12]. The vibration periods and straining actions were affected by the location of stairs [9].…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance of Staircases in the 3D Analysis of RC Building

2022

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Stairs play an important role as an escape way and are considered a source of safety in the building during an earthquake. Neglecting the stairs in the 3D analysis model is the main cause of the stairs' failure during the earthquake. Although the previous researchers had focused on the behavior of stairs when changing single variables such as height, location, and layout under seismic loads, no detailed investigation that gathers these variables together was considered. This research studies the effects of changing the number of storeys for a building subjected to an earthquake when considering and neglecting stairs in the 3D analysis with and without shear walls. The effect of the volume and location of the shear wall has been considered through conducting computational analysis using ETABS software to help the structural engineer choose the proper system of stairs and shear walls. Neglecting the staircase in the 3D analysis affects the structure's performance, which leads to ignoring many stresses transferred to the stairs, causing several damages to the stairs during an earthquake. For the existing building without a shear wall, considering the staircases in the analysis improves the performance of the structure under seismic loads. Doi: 10.28991/CEJ-SP2021-07-08 Full Text: PDF

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Dynamic characteristics and seismic behavior of prefabricated steel stairs in a full‐scale five‐story building shake table test program

Cited by 13 publications

References 16 publications

Evolution of modal characteristics of a mid‐rise cold‐formed steel building during construction and earthquake testing

Evolution of modal characteristics of a mid‐rise cold‐formed steel building during construction and earthquake testing

Special braced stairs versus typical braced frames. New architectural‐structural‐seismic approach to stair design

Seismic Performance of Staircases in the 3D Analysis of RC Building

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