Seismic Behavior and Design Approach of Variable-Damping Self-Centering Braced Frame

2021 ◽  
Vol 147 (6) ◽  
pp. 05021001
Author(s):  
Longhe Xu ◽  
Xingsi Xie ◽  
Zhongxian Li
Keyword(s):  
Seismic Behavior ◽  
Design Approach ◽  
Braced Frame ◽  
Variable Damping

Amending and Changing the Seismic Behavior of K-bracing by Yielding Damped Braced Frame (YDBF)

2016 ◽  
Vol 10 (12) ◽  
pp. 75
Author(s):  
Vajdian Mehdi ◽  
Parvari Ali ◽  
Habibi Alireza
Keyword(s):  
Seismic Behavior ◽  
Control Method ◽  
Low Cost ◽  
Linear Analysis ◽  
Existing Buildings ◽  
Metallic Structure ◽  
Braced Frame ◽  
Tensile Forces ◽  
Metallic Dampers ◽  
Waste Energy

An inactive control method is to prepare the kinds of dampers as inactive energy wasting factor for metallic structure buildings. Yielding metallic dampers (or excurrent) are metallic devices which can waste energy in an earthquake by the effect of non-elastic changes of metals, also in the braced systems of structure buildings, they can improve resistance against earthquake and their damages control potential significantly. With regard to the geometry of K-bracing and the weaknesses which are by the effect of a resultant of two compressive and tensile forces of Bersnon, Iran's earthquake regulation in 2008 has exerted some limitations for using of this system. Therefore, in this research we tried to eliminate these limitations to some extent by using of metallic dampers. For doing this research, by using of two software of finite components (sap2000, Abaqus) with static non-linear analysis, we achieved the same purpose. This kind of dampers due to the simplicity of their installation and low cost of them can be applied both in new and existing buildings.

Comments about the Seismic Behavior of “Inverted Y”- Braced Frames

2018 ◽  
Vol 763 ◽  
pp. 106-115
Author(s):  
Helmuth Köber ◽  
Marina Stoian
Keyword(s):  
Seismic Design ◽  
Cross Sections ◽  
Seismic Behavior ◽  
Braced Frames ◽  
Design Code ◽  
Nonlinear Analyses ◽  
Braced Frame ◽  
Seismic Design Code ◽  
Steel Consumption ◽  
Plastic Zones

Four configurations were analyzed for a ten storey “inverted Y-braced” frame with rigid and/or pined beam/column and diagonal/column connections. All considered frame configurations were sized for the forces produced by the same code seismic design force evaluated according to the in charge Romanian seismic design code. In case of two of the considered configurations, additional potentially plastic zones with reduced member cross-sections were provided along the girders and diagonals of the frame (in order to size clearly by design a global plastic failure mechanism for the “inverted Y-braced” frame). The behavior of each frame configuration during dynamic nonlinear analyses was observed. The steel consumption was estimated for each considered configuration.

scholarly journals Seismic Vulnerability of Multi-Storey Buildings with Masonry Walls

2020 ◽  
Vol 8 (5) ◽  
pp. 4320-4323
Keyword(s):  
Seismic Behavior ◽  
Seismic Vulnerability ◽  
Pushover Analysis ◽  
Infill Wall ◽  
Braced Frame ◽  
Masonry Infill ◽  
Rigid Frame ◽  
Infill Panels ◽  
Recent Earthquakes ◽  
Masonry Infill Wall

In the seismic codes, lateral rigidity and strength of infill panels are ignored in the design. However recent earthquakes occurred in the world has shown that infill walls change the dynamic behavior of the frame. In this article we propose to investigate the effect of infill wall on the seismic behavior of framed concrete buildings. For this purpose, a framed reinforced concrete building is considered. An equivalent diagonal strut model is used for masonry infill. The strut properties are calculated according to the FEMA306 [7]. Nonlinear pushover analysis is used to assess the seismic behavior. The results show that introduction of the masonry infill wall in the analysis modifies the behavior of bare frame. There is a drastic change in the bending moments and shear forces. The modeling of infill wall transforms the rigid frame into braced frame.

Seismic Behavior Investigation of Prefabricated Steel Industrial Buildings

2018 ◽  
Vol 763 ◽  
pp. 131-138
Author(s):  
Kasim A. Korkmaz ◽  
Musa Uzer
Keyword(s):  
Seismic Behavior ◽  
Unit Weight ◽  
Steel Buildings ◽  
Infill Walls ◽  
Braced Frame ◽  
Masonry Infill ◽  
Earthquake Loads ◽  
Masonry Infill Walls ◽  
Industrial Buildings ◽  
Frame Systems

Prefabricated steel industrial buildings are designed with design standards against to earthquake loads. Several lateral systems are used to increase the strength of steel industrial buildings against earthquake loads. Most commonly used systems are braced frame systems. In the braced frame systems, the most important problem is the buckling of these members under compression loads. Currently, the cost for buckling restrained braced frame systems are too high. For steel industrial buildings, the buildings` cost are calculated by considering unit weight of steel. The main cost of the building is based on manufacturing of steel and erection of the building. On the other hand, masonry infilled wall systems are preferred to protect the inside. Masonry infill walls are the structural members resisting to compression loads. Masonry infill walls are commonly rigid systems on contrary to braced frame systems since the masonry infill walls are constructed during the both axes. The aim of this study is to evaluate the seismic behavior of prefabricated steel industrial buildings. These industrial buildings were considered in various combinations as bare, with tension strand systems as braced frame members and masonry infill walls which are used to resist lateral forces. Behavior of tension strand systems used as lateral resistance in prefabricated steel buildings comparing to bare and infill walled ones have been investigated. In the models with tension strand systems, various diameters and pretension loads were used for investigation of various cases of structural system.

Experimental Study on Seismic Behavior of High Strength Steel Composite K-Type Eccentrically Braced Frames

2013 ◽  
Vol 838-841 ◽  
pp. 559-563
Author(s):  
Liu Sheng Duan ◽  
Ming Zhou Su ◽  
Hui Li
Keyword(s):  
High Strength Steel ◽  
Seismic Behavior ◽  
Cyclic Load ◽  
Failure Modes ◽  
High Strength ◽  
Eccentrically Braced Frames ◽  
Braced Frame ◽  
Eccentrically Braced Frame ◽  
Steel Composite ◽  
Energy Absorbing

High strength steel composite K-type eccentrically braced frame is a new structural system, in which the link is made from low yield point steel and the others are made from high strength steel. In order to study the seismic behavior of such a structure, four one-bay one-story 1/2 scaled plane specimens were tested under the monotonic and cyclic load respectively. The failure modes and the main indexes of seismic behavior of specimens with various links length were analyzed. The results show that this new structural form is good at energy dissipation and ductility, and the way of energy absorbing by shear yield is better than by flexure yield. Under cyclic load, the main failure were concentrated at links, while the other parts of the eccentrically braced frame kept in elastic status. This kind of structure is an excellent dual resistance system and easy to rehabilitate after earthquake.

Effect of Column Stiffness on Braced Frame Seismic Behavior

2004 ◽  
Vol 130 (3) ◽  
pp. 381-391 ◽  
Author(s):  
Gregory A. MacRae ◽  
Yoshihiro Kimura ◽  
Charles Roeder
Keyword(s):  
Seismic Behavior ◽  
Braced Frame
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