scholarly journals Assessment of First Generation Performance-Based Seismic Design Methods for New Steel Buildings, Volume 1: Special Moment Frames

2015 ◽  
Author(s):  
John L. Harris III ◽  
Matthew S. Speicher
Keyword(s):  
Seismic Design ◽  
First Generation ◽  
Design Methods ◽  
Steel Buildings ◽  
Moment Frames ◽  
Special Moment Frames ◽  
Performance Based Seismic Design

Assessment of Performance-Based Seismic Design Methods in ASCE 41 for New Steel Buildings: Special Moment Frames

2018 ◽  
Vol 34 (3) ◽  
pp. 977-999 ◽  
Author(s):  
John Harris ◽  
Matthew Speicher
Keyword(s):  
Seismic Design ◽  
Performance Metrics ◽  
Structural Performance ◽  
Steel Buildings ◽  
Moment Frames ◽  
Component Level ◽  
Existing Building ◽  
Special Moment Frames ◽  
Steel Building ◽  
Performance Based Seismic Design

This paper presents the results of a study investigating the correlation between the anticipated seismic performance of an ASCE 7 code-compliant steel building with special moment frames and its predicted performance as quantified using ASCE 41 analysis procedures and structural performance metrics. Analytical results based on component-level performances at the collapse prevention structural performance level indicate that special moment frames designed in accordance with ASCE 7, and its referenced standards, have difficulty satisfying the acceptance criteria in ASCE 41 for an existing building intended to be equivalent to a new building.

Code-Oriented Methodology for the Seismic Design of Regular Steel Moment-Resisting Braced Frames

2014 ◽  
Vol 30 (4) ◽  
pp. 1683-1709 ◽  
Author(s):  
Edgar Tapia-Hernández ◽  
Arturo Tena-Colunga
Keyword(s):  
Seismic Design ◽  
Time History ◽  
Federal District ◽  
Design Parameters ◽  
Braced Frames ◽  
Steel Buildings ◽  
Moment Frames ◽  
Concentrically Braced Frames ◽  
Design Spectrum ◽  
Moment Resisting

In order to help improve the seismic design of regular steel buildings structured with ductile moment-resisting concentrically braced frames (MRCBFs) using the general design methodology of Mexico's Federal District Code (MFDC-04), suitable design parameters were first assessed using the results of pushover analyses of 13 regular MRCBFs. In order to insure collapse mechanisms consistent with the assumptions implicit in a code-based design (strong-column/weak-beam/weaker-brace), it is proposed to relate the minimum strength ratio for the resisting columns of the moment frames and the bracing system. Improved equations are proposed for a more realistic assessment of ductility and overstrength factors. In a second stage, the effectiveness of the improved methodology was assessed with the design of six regular steel buildings with MRCBFs. Buildings were evaluated by performing both pushover and nonlinear time-history analyses under ten selected artificial ground motions related to the corresponding design spectrum.

Seismic characterization of steel special moment frames subjected to megathrust earthquakes

2020 ◽  
Vol 36 (4) ◽  
pp. 2033-2057
Author(s):  
Miguel Medalla ◽  
Diego Lopez-Garcia ◽  
Farzin Zareian
Keyword(s):  
Seismic Design ◽  
Ground Motions ◽  
Steel Structures ◽  
Moment Frames ◽  
Risk Levels ◽  
Megathrust Earthquakes ◽  
Crustal Earthquakes ◽  
Special Moment Frames ◽  
Seismic Characterization ◽  
Design Requirements

Current seismic design requirements were established considering mainly (almost exclusively) ground motions caused by shallow crustal earthquakes, hence they might lead to different-from-intended risk levels when applied at locations prone to large-magnitude subduction (i.e. megathrust) earthquakes. In this study, the seismic behavior of 40 modern steel special moment frames (SSMFs) subjected to both megathrust and crustal ground motions is evaluated. Three analyses are performed: (1) a hazard-consistent analysis; (2) a comparative collapse risk evaluation; and (3) a performance evaluation following the approach indicated in Federal Emergency Management Agency (FEMA) P695. Results indicate that the collapse probability of mid- and high-rise SSMFs subjected to megathrust ground motions is indeed larger than that under crustal ground motions. Modifications to the current design criteria are then suggested, intended not only for United States but also for countries, such as Ecuador, where the US seismic design requirements for steel structures were adopted and seismic ground motions are actually caused by megathrust earthquakes.

Seismic Performance Evaluation of Intermediate Moment Frames with Reduced Beam Section and Bolted Web Connections

2015 ◽  
Vol 31 (2) ◽  
pp. 895-919 ◽  
Author(s):  
Sang Whan Han ◽  
Ki Hoon Moon ◽  
Seong-Hoon Hwang ◽  
Bozidar Stojadinovic
Keyword(s):  
Seismic Performance ◽  
Seismic Design ◽  
Moment Frames ◽  
Seismic Performance Evaluation ◽  
Reduced Beam Section ◽  
Rotation Capacity ◽  
Special Moment Frames ◽  
Story Drift ◽  
Beam Section ◽  
B Test

A reduced beam section with a bolted web (RBS-B) connection is permitted for use only in intermediate moment frames (IMF) according to the ANSI/AISC 358-05. This is because some RBS-B test specimens failed to achieve 4% total rotation capacity, which is the minimum story drift angle required for special moment frames (SMF). Several studies reported that some RBS-B connections could experience brittle connection fracture during earthquakes, which can also be detrimental to the seismic performance of IMF systems with RBS-B connections. For investigating whether IMFs with RBS-B connections provide a satisfactory seismic performance, this study evaluated the seismic performance of IMFs with pre-qualified RBS-B connections following the ATC-63 procedure. Twenty-four model buildings were designed according to current seismic design provisions. Several IMFs with RBS-B connections do not satisfy the acceptance criteria specified in ATC-63.

Toward Performance-Based Seismic Design of Structures

1999 ◽  
Vol 15 (3) ◽  
pp. 435-461 ◽  
Author(s):  
Sutat Leelataviwat ◽  
Subhash C. Goel ◽  
Božidar Stojadinović
Keyword(s):  
Seismic Design ◽  
Design Procedure ◽  
Future Generation ◽  
Velocity Spectrum ◽  
Base Shear ◽  
Moment Frames ◽  
Steel Moment Frame ◽  
Plastic Analysis ◽  
Performance Based Seismic Design ◽  
Seismic Design Of Structures

A new performance-based plastic design procedure for steel moment frames is presented in this paper. The role of plastic analysis in seismic design of structures is illustrated. The ultimate design base shear for plastic analysis is derived by using the input energy from the design pseudo-velocity spectrum, a pre-selected yield mechanism, and an ultimate target drift. The proposed design procedure eliminates the need for a drift check after the structure is designed for strength as is done in the current design practice. Also, there is no need for response modification factors since the load deformation characteristics of the structure, including ductility and post-yield behavior, are explicitly used in calculating the design forces. The results of nonlinear static and nonlinear dynamic analyses of an example steel moment frame designed by the proposed method are presented and discussed. The implications of the new design procedure for future generation of seismic design codes are also discussed.

scholarly journals Seismic design of steel special moment frames:

2009 ◽  
Author(s):  
Ronald O Hamburger ◽  
Helmut Krawinkler ◽  
James O Malley ◽  
Scott M Adan
Keyword(s):  
Seismic Design ◽  
Moment Frames ◽  
Special Moment Frames
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