Seismic Analysis of Steel Frames Using Spectral-Representation-Based Artificial Accelerograms

Author(s):  
S. Rashidi ◽  
M. A. Saadeghvaziri ◽  
R. Navalurkar
Structures ◽  
2021 ◽  
Vol 33 ◽  
pp. 12-27
Author(s):  
Alfredo Reyes-Salazar ◽  
Eden Bojorquez ◽  
Juan Bojorquez ◽  
Mario D. Llanes-Tizoc ◽  
J. Ramon Gaxiola-Camacho ◽  
...  

2019 ◽  
Vol 10 (1) ◽  
pp. 284 ◽  
Author(s):  
Rong Chen ◽  
Canxing Qiu ◽  
Dongxue Hao

Multi-story steel frames are popular building structures. For those with insufficient seismic resistance, their seismic capacity can be improved by installing buckling-restrained braces (BRBs), which is known for high energy dissipation capacity, and the corresponding frame is denoted as BRB frame (BRBF). However, BRBFs are frequently criticized because of excessive residual deformations after earthquakes, which impede the post-event repairing work and immediate occupancy. Meanwhile, self-centering braces (SCBs), which were invented with a particular purpose of eliminating residual deformation for the protected structures, underwent fast development in recent years. However, the damping capability of SCBs is relatively small because their hysteresis is characterized by a flag shape. Therefore, this paper aims to combine these two different braces to form a hybrid bracing system. A total of four combinations are proposed to seek an optimal solution. The multi-story steel frames installed with BRBs, SCBs, and combined braces are numerically investigated through nonlinear static and dynamic analyses. Interested seismic response parameters refer to the maximum story drift ratios, maximum floor accelerations, and residual story drift ratios. The seismic analysis results indicate that the frames using the combined bracing system are able to take the advantages of BRBs and SCBs.


2018 ◽  
Vol 211 ◽  
pp. 14001
Author(s):  
Enrico Zacchei ◽  
José Luis Molina

The aim of this paper is to analyse the damage on gravity dams through artificial earthquakes from two methods. The first procedure defines the performance and the response curve of concrete gravity dams using a harmonic function which establishes linear displacements. The other procedure to obtain the artificial earthquake defines the power spectral density function consistent with the response spectrum. This artificial accelerogram is necessary to quantify the response curve of concrete gravity dams in the time domain. The seismic activity in Spain is not frequent, therefore it is often difficult to select real accelerograms to perform a complete seismic analysis, which makes artificial accelerograms extremely useful. Finally, combining these two procedures, a damage index is determined for assessing the crack’s magnitude. These both efficient and practical procedures are useful to develop further complicated analysis.


Author(s):  
G. Della Corte ◽  
G. De Matteis ◽  
R. Landolfo ◽  
F.M. Mazzolani

1991 ◽  
pp. 125-132
Author(s):  
A. Filiatrault ◽  
B. Folz ◽  
H.G.L. Prion

2002 ◽  
Vol 58 (10) ◽  
pp. 1331-1345 ◽  
Author(s):  
G Della Corte ◽  
G De Matteis ◽  
R Landolfo ◽  
F.M Mazzolani

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