Seismic performance of composite RCS special moment frames

2013 ◽  
Vol 17 (2) ◽  
pp. 450-457 ◽  
Author(s):  
Bahman Farahmand Azar ◽  
Hosein Ghaffarzadeh ◽  
Nima Talebian
Keyword(s):  
Seismic Performance ◽  
Moment Frames ◽  
Special Moment Frames

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.

Effect of Common U.S. Ground Motion Selection Methods on the Structural Response of Steel Moment Frame Buildings

2019 ◽  
Vol 35 (4) ◽  
pp. 1611-1635
Author(s):  
Raul Uribe ◽  
Siamak Sattar ◽  
Matthew S. Speicher ◽  
Luis Ibarra
Keyword(s):  
Los Angeles ◽  
Ground Motion ◽  
Seismic Performance ◽  
Common Ground ◽  
Traditional Approach ◽  
Structural Response ◽  
Output Parameter ◽  
Selection Methods ◽  
Moment Frames ◽  
The Impact

This study quantifies the impact of two common ground motion (GM) selection methods, included in U.S. standards, on the seismic performance evaluation of steel special moment frames. The methods investigated are a “traditional” approach, herein referred to as the target maximum considered earthquake (TMCE) method, and a newer approach known as the conditional mean spectrum (CMS) method. The TMCE method selects GMs using the risk-based maximum considered earthquake (MCER) spectrum as the target spectrum, while the CMS method uses the CMS that anchors the MCER at multiple conditioning periods. Three special steel moment frames of 4, 8, and 16 stories are designed in accordance with ASCE/SEI 7-10, and their seismic performance is assessed with the nonlinear dynamic procedure prescribed in ASCE/SEI 41-13 using GMs selected and scaled in accordance with the aforementioned methods. A comparison of statistical parameters for the reduced beam sections and column hinges is conducted using the normalized demand-to-capacity ratio ( DCR), as the output parameter. The buildings are evaluated at the collapse prevention performance level for a far-field site located in Los Angeles, CA. In general, the CMS method results in lower DCRs of the frame components and smaller output parameter dispersion. In addition to the spectral shape, the demands are largely influenced by the spectral accelerations prescribed for each evaluated method. The consideration of collapse realizations is also documented as well as the existing and proposed statistical methods to account for these realizations. The study shows that the GM selection process can cause significant differences in structural response that may lead to different retrofitting decisions.

Investigation of Seismic Performance of (RBS) and Drilled Flange Connection (DFC) Containing rhombus Shaped Hole in Steel Moment Frames

2020 ◽  
Vol 18 (2) ◽  
pp. 246-262
Author(s):  
Mehdi Vajdian ◽  
S. Mehdi Zahraei ◽  
S. Mohammad Mirhosseini ◽  
Ehsanollah Zeighami
Keyword(s):  
Seismic Performance ◽  
Moment Frames ◽  
Steel Moment Frames ◽  
Flange Connection ◽  
Shaped Hole

scholarly journals Column splice fracture effects on the seismic performance of steel moment frames

2017 ◽  
Vol 137 ◽  
pp. 93-101 ◽  
Author(s):  
Kimberly Stillmaker ◽  
Xai Lao ◽  
Carmine Galasso ◽  
Amit Kanvinde
Keyword(s):  
Seismic Performance ◽  
Moment Frames ◽  
Steel Moment Frames

Cast Modular Panel Zone Node for Steel Special Moment Frames. I: Analytical Development

2007 ◽  
Vol 133 (10) ◽  
pp. 1393-1403 ◽  
Author(s):  
Robert B. Fleischman ◽  
Xuejun Li ◽  
Yong Pan ◽  
Ali Sumer
Keyword(s):  
Moment Frames ◽  
Panel Zone ◽  
Special Moment Frames ◽  
Analytical Development
Sign in / Sign up

Export Citation Format

Share Document