Comparing the Seismic Behavior of Various Knee Braced Steel Frames Based on Incremental Dynamic Analysis and Development of Fragility Curves

2021 ◽  
Author(s):  
R. Yahyapour ◽  
S. M. Seyedpoor
Keyword(s):  
Dynamic Analysis ◽  
Seismic Behavior ◽  
Fragility Curves ◽  
Steel Frames ◽  
Incremental Dynamic Analysis

scholarly journals Seismic performance of MR steel frames via Incremental Dynamic Analysis

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 1924-1931
Author(s):  
Claudio Bernuzzi ◽  
Davide Rodigari ◽  
Marco Simoncelli
Keyword(s):  
Dynamic Analysis ◽  
Seismic Performance ◽  
Steel Frames ◽  
Incremental Dynamic Analysis

Incremental Dynamic Analysis of Shape Memory Alloy Braced Steel Frames

2014 ◽  
Vol 680 ◽  
pp. 263-266
Author(s):  
Saber Moradi ◽  
M. Shahria Alam
Keyword(s):  
Shape Memory Alloy ◽  
Dynamic Analysis ◽  
Shape Memory ◽  
Seismic Performance ◽  
Steel Frames ◽  
Incremental Dynamic Analysis ◽  
Braced Frames ◽  
Earthquake Excitation ◽  
Uniform Drift ◽  
Buckling Restrained Braced Frames

Incremental Dynamic Analysis (IDA) is a technique to determine the overall seismic performance of structures under varied intensities of earthquakes. In this paper, the seismic performance of four-story steel braced frames equipped with superelastic Shape Memory Alloy (SMA) braces is assessed by performing IDA. The seismic response of SMA-braced frames was compared to that of corresponding Buckling-Restrained Braced Frames (BRBFs). Based on the results of this comparative study, the SMA-braced frames were generally effective in reducing maximum interstory drifts and permanent roof deformations. In addition, the SMA-braced frames demonstrated more uniform drift distribution over the height of the building. As the intensity of earthquake excitation increases, a higher response reduction can be expected for SMA-braced frames.

Performance-Based Seismic Vulnerability Evaluation of Masonry Buildings Using Applied Element Method in a Nonlinear Dynamic-Based Analytical Procedure

2013 ◽  
Vol 29 (2) ◽  
pp. 399-426 ◽  
Author(s):  
Amin Karbassi ◽  
Marie-José Nollet
Keyword(s):  
Dynamic Analysis ◽  
Seismic Vulnerability ◽  
Fragility Curves ◽  
Progressive Collapse ◽  
Incremental Dynamic Analysis ◽  
Masonry Building ◽  
Performance Levels ◽  
Plane Failure ◽  
Applied Element Method ◽  
Element Method

A thorough four-step performance-based seismic evaluation for a six-story unreinforced masonry building is conducted. Incremental dynamic analysis is carried out using the applied element method to take advantage of its ability to simulate progressive collapse of the masonry structure including out-of-plane failure of the walls. The distribution of the structural responses and inters-tory drifts from the incremental dynamic analysis curves are used to develop both spectral-based (Sa) and displacement-based (interstory drift) fragility curves at three structural performance levels. The curves resulting from three-dimensional (3-D) analyses using unidirectional ground motions are combined using the weakest link theory to propose combined fragility curves. Finally, the mean annual frequencies of exceeding the three performance levels are calculated using the spectral acceleration values at four probability levels 2%, 5%, 10%, and 40% in 50 years. The method is shown to be useful for seismic vulnerability evaluations in regions where little observed damage data exists.

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