A structural model for panel zones in non linear seismic analysis of steel moment-resisting frames

2004 ◽  
Vol 26 (3) ◽  
pp. 363-380 ◽  
Author(s):  
Maria Gabriella Mulas
Keyword(s):  
Structural Model ◽  
Seismic Analysis ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Non Linear ◽  
Moment Resisting

Influence of the P-Delta Effect on the Design of Steel Moment Resisting Frame in Seismic Areas

2021 ◽  
Vol 873 ◽  
pp. 33-37
Author(s):  
Roberto Tartaglia ◽  
Alessia Campiche ◽  
Attilio de Martino
Keyword(s):  
North American ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Moment Resisting Frame ◽  
The North ◽  
Non Linear ◽  
Moment Resisting ◽  
Draft Version ◽  
Steel Moment Resisting Frame ◽  
Lateral Displacements

Steel moment resisting frames (MRFs) compliant with EN1998-1 are generally overdesigned in order to satisfy the requirements for lateral deformability and P-Delta effects. On the contrary, the North American codes (e.g. ASCE7) give different rules for P-Delta effects. The current draft version of the amended EN1998-1-1 introduces a different methodology to account for the structural lateral displacements. In this paper static non-linear analyses were carried out to evaluate the effectiveness of the new EC8 provisions with respect to the former version of EC8 and the current ASCE7. The results show that the structures designed according to the latest draft version of the EN1998-1-1 and those compliant with the North American code exhibit similar behavior.

scholarly journals Implications of Structural Model on the Design of Steel Moment Resisting Frames

2018 ◽  
Vol 12 (1) ◽  
pp. 124-131 ◽  
Author(s):  
Alexandru Isaincu ◽  
Mario D’ Aniello ◽  
Aurel Stratan
Keyword(s):  
Structural Model ◽  
Order Effects ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Planar Frames ◽  
Moment Resisting ◽  
Instability Factor ◽  
Modelling Assumptions ◽  
The Stability ◽  
Factor Α

Background: Studies have shown that the flexibility of the connections has an important role in the distribution of forces and moments in the structure. This also applies for the displacements, deformations and the stability of the structure. Objective: The objective of the present study is to investigate the influence of the stiffness of column web-panel and connection on the ultimate response of Moment Resisting Frames (MRFs). Methods: A comprehensive parametric study was carried out. In particular, a set of one hundred and twenty planar frames was analyzed, considering three approaches for modelling the joints. Results: The results highlight that neglecting the influence of the connection and column web panel leads to significant over-estimation of the global instability factor αcr, which can lead to unconservative design and assessment of steel frames, especially for those cases subjected to severe horizontal forces as the seismic actions. Conclusion: Accounting for the joint deformability in MRFs is important even for the cases with connection stiffness (kb) larger than 25 times the beam stiffness where EN1993-1-8 allows neglecting the model of the connection stiffness. Indeed, the comparison of cases with kb ≥ 25 between the models with and without the connection deformability show that of αcr can decrease from 5% to 16%, depending on the refinement of the modelling assumptions. This decrease also lead to higher second order effects and thus to higher design forces but also the overall stiffness of the frame is overestimated.

Performance-based assessment of seismic-resilient steel moment resisting frames equipped with innovative column base connections

Structures ◽  
2021 ◽  
Vol 32 ◽  
pp. 1646-1664
Author(s):  
Elena Elettore ◽  
Annarosa Lettieri ◽  
Fabio Freddi ◽  
Massimo Latour ◽  
Gianvittorio Rizzano
Keyword(s):  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Performance Based Assessment ◽  
Moment Resisting ◽  
Base Connections ◽  
Column Base

Seismic design of self-centering viscous-hysteretic devices used for steel moment-resisting frames

2021 ◽  
Vol 239 ◽  
pp. 112369
Author(s):  
Ruizhao Zhu ◽  
Tong Guo ◽  
Frank Mwangilwa ◽  
Daguang Han
Keyword(s):  
Seismic Design ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Moment Resisting

Collapse risk of pre-Northridge tall steel moment-resisting frames in the Seattle basin during large-magnitude subduction earthquakes

2021 ◽  
Vol 244 ◽  
pp. 112751
Author(s):  
Carlos Molina Hutt ◽  
Shervin Zahedimazandarani ◽  
Nasser A. Marafi ◽  
Jeffrey W. Berman ◽  
Marc O. Eberhard
Keyword(s):  
Large Magnitude ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Subduction Earthquakes ◽  
Moment Resisting
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