Studying the seismic behavior of gate braced frames by incremental dynamic analysis (IDA)

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.

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Incremental Dynamic Analysis of Concentric X‐Braced Frames Designed to the TBEC 2018

ce/papers ◽

10.1002/cepa.1514 ◽

2021 ◽

Vol 4 (2-4) ◽

pp. 1999-2007

Author(s):

Efecan Kor ◽

Yigit Ozcelik

Keyword(s):

Dynamic Analysis ◽

Incremental Dynamic Analysis ◽

Braced Frames

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Incremental dynamic analysis of steel braced frames designed based on the first, second and third editions of the Iranian seismic code (standard no. 2800)

The Structural Design of Tall and Special Buildings ◽

10.1002/tal.528 ◽

2011 ◽

Vol 20 (2) ◽

pp. 190-207 ◽

Cited By ~ 9

Author(s):

Behrouz Asgarian ◽

Ali Jalaeefar

Keyword(s):

Dynamic Analysis ◽

Incremental Dynamic Analysis ◽

Braced Frames ◽

Seismic Code ◽

Code Standard

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An approach to quantify the influence of ground motion uncertainty on elastoplastic system acceleration in incremental dynamic analysis

Advances in Structural Engineering ◽

10.1177/1369433217693630 ◽

2017 ◽

Vol 20 (11) ◽

pp. 1744-1756 ◽

Cited By ~ 1

Author(s):

Peng Deng ◽

Shiling Pei ◽

John W. van de Lindt ◽

Hongyan Liu ◽

Chao Zhang

Keyword(s):

Dynamic Analysis ◽

Ground Motion ◽

Earthquake Engineering ◽

Structural Response ◽

Incremental Dynamic Analysis ◽

Degree Of Freedom ◽

Maximum Acceleration ◽

Single Degree Of Freedom ◽

Single Degree ◽

Performance Based Earthquake Engineering

Inclusion of ground motion–induced uncertainty in structural response evaluation is an essential component for performance-based earthquake engineering. In current practice, ground motion uncertainty is often represented in performance-based earthquake engineering analysis empirically through the use of one or more ground motion suites. How to quantitatively characterize ground motion–induced structural response uncertainty propagation at different seismic hazard levels has not been thoroughly studied to date. In this study, a procedure to quantify the influence of ground motion uncertainty on elastoplastic single-degree-of-freedom acceleration responses in an incremental dynamic analysis is proposed. By modeling the shape of the incremental dynamic analysis curves, the formula to calculate uncertainty in maximum acceleration responses of linear systems and elastoplastic single-degree-of-freedom systems is constructed. This closed-form calculation provided a quantitative way to establish statistical equivalency for different ground motion suites with regard to acceleration response in these simple systems. This equivalence was validated through a numerical experiment, in which an equivalent ground motion suite for an existing ground motion suite was constructed and shown to yield statistically similar acceleration responses to that of the existing ground motion suite at all intensity levels.

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Seismic capacity estimation of a reinforced concrete containment building considering bidirectional cyclic effect

Advances in Structural Engineering ◽

10.1177/1369433218806034 ◽

2018 ◽

Vol 22 (5) ◽

pp. 1106-1120

Author(s):

Zhi Zheng ◽

Changhai Zhai ◽

Xu Bao ◽

Xiaolan Pan

Keyword(s):

Reinforced Concrete ◽

Dynamic Analysis ◽

Geometric Mean ◽

Pushover Analysis ◽

Incremental Dynamic Analysis ◽

Dissipated Energy ◽

Seismic Capacity ◽

Capacity Estimation ◽

Earthquake Intensity ◽

Static Pushover Analysis

This study serves to estimate the seismic capacity of the reinforced concrete containment building considering its bidirectional cyclic effect and variations of energy. The implementation of the capacity estimation has been performed by extending two well-known methods: nonlinear static pushover and incremental dynamic analysis. The displacement and dissipated energy demands are obtained from the static pushover analysis considering bidirectional cyclic effect. In total, 18 bidirectional earthquake intensity parameters are developed to perform the incremental dynamic analysis for the reinforced concrete containment building. Results show that the bidirectional static pushover analysis tends to decrease the capacity of the reinforced concrete containment building in comparison with unidirectional static pushover analysis. The 5% damped first-mode geometric mean spectral acceleration strongly correlates with the maximum top displacement of the containment building. The comparison of the incremental dynamic analysis and static pushover curves is employed to determine the seismic capacity of the reinforced concrete containment building. It is concluded that bidirectional static pushover and incremental dynamic analysis studies can be used in performance evaluation and capacity estimation of reinforced concrete containment buildings under bidirectional earthquake excitations.

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