Seismic response of unbraced steel frames

1991 ◽  
Vol 20 (11) ◽  
pp. 1029-1043 ◽  
Author(s):  
K. S. Sivakumaran
Keyword(s):  
Seismic Response ◽  
Steel Frames

scholarly journals Seismic Response Analysis of Multi-Story Steel Frames Using BRB and SCB Hybrid Bracing System

2019 ◽  
Vol 10 (1) ◽  
pp. 284 ◽  
Author(s):  
Rong Chen ◽  
Canxing Qiu ◽  
Dongxue Hao
Keyword(s):  
Seismic Response ◽  
Seismic Analysis ◽  
Steel Frames ◽  
Residual Deformation ◽  
High Energy ◽  
Response Analysis ◽  
Building Structures ◽  
Seismic Capacity ◽  
Story Drift ◽  
Bracing System

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.

Seismic Response of Low‐Rise Steel Frames

1989 ◽  
Vol 115 (3) ◽  
pp. 594-607 ◽  
Author(s):  
W. Youssef‐Agha ◽  
H. M. Aktan ◽  
O. D. Olowokere
Keyword(s):  
Seismic Response ◽  
Steel Frames

On the seismic response and damping capacity of low-rise plane steel frames with seesaw system

2018 ◽  
Vol 107 ◽  
pp. 407-416 ◽  
Author(s):  
Panagiota S. Katsimpini ◽  
George A. Papagiannopoulos ◽  
Manolis G. Sfakianakis
Keyword(s):  
Seismic Response ◽  
Steel Frames ◽  
Damping Capacity
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