Comparison of seismic behavior of steel building adjacent to slope topography by considering fixed-base, SSI and TSSI

2020 ◽  
Vol 21 (7) ◽  
pp. 1151-1169
Author(s):  
Mohammad Javad Shabani ◽  
Ali Ghanbari
Keyword(s):  
Seismic Behavior ◽  
Steel Building ◽  
Fixed Base ◽  
Slope Topography

Seismic behavior of structures considering uplift and soil–structure interaction

2017 ◽  
Vol 20 (11) ◽  
pp. 1712-1726
Author(s):  
Farhad Behnamfar ◽  
Seyyed Mohammad Mirhosseini ◽  
Hossein Alibabaei
Keyword(s):  
Seismic Behavior ◽  
Soil Structure ◽  
Nonlinear Dynamic Analysis ◽  
Steel Structures ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Nonlinear Seismic Response ◽  
Tensile Forces ◽  
Fixed Base ◽  
Flexible Base

A common assumption when analyzing a structure for earthquake forces is that the building is positively attached to a rigid ground so that it can sustain possible tensile forces without being detached, or uplifted, from its bearing points. Considering the facts that almost no tension can be transferred between a surface foundation and soil and soft soils interact with the supported structure during earthquakes, in this research, the effects of uplift and soil–structure interaction on nonlinear seismic response of structures are evaluated. Several reinforced concrete and steel structures under different suits of consistent ground motions are considered. The base of the buildings is modeled with vertical no-tension springs being nonlinear in compression. The total soil–structure interaction system is modeled within OpenSees, and the seismic behavior is evaluated using a nonlinear dynamic analysis. The nonlinear responses of buildings are determined and compared between three cases: fixed base, flexible base without uplift, and flexible base with uplift. The cases for which uplift in conjunction with soil–structure interaction should be considered are identified.

Seismic Behavior of Full‐Scale Concentrically Braced Steel Building Structure

1989 ◽  
Vol 115 (8) ◽  
pp. 1917-1929 ◽  
Author(s):  
Hiroyuki Yamanouchi ◽  
Mitsumasa Midorikawa ◽  
Isao Nishiyama ◽  
Makoto Watabe
Keyword(s):  
Seismic Behavior ◽  
Full Scale ◽  
Building Structure ◽  
Concentrically Braced ◽  
Steel Building

scholarly journals STUDY ON SEISMIC BEHAVIOR OF STEEL BEAM-TO-COLUMN PANEL ZONES

2020 ◽  
Vol 1 (1) ◽  
pp. 13-15
Author(s):  
Tran Tuan Nam
Keyword(s):  
Seismic Behavior ◽  
The Other ◽  
Steel Beam ◽  
Plastic Behavior ◽  
Moment Frame ◽  
Steel Moment Frame ◽  
Building Collapse ◽  
Panel Zone ◽  
Lateral Forces ◽  
Steel Building

Beam-to-column panel zone behavior in a steel moment-frame is characterized by the surrounding acting forces and its rotating deformation. When subjected to lateral forces, panel zones are deformed in a parallelogram pattern that one side of its diagonal direction is in tension whereas the other side is in compression. Moreover, right angles at the joints between the beam, column ends and the panel remains right angles. Shear strain causes the panel to rotate at a finite angle characterizing its rotating deformation. Based on experimental results from a full scale steel building collapse test, this paper discusses the elastic and elasto-plastic behavior of some typical panel zones.

scholarly journals Investigation of a Base-Isolator System’s Effects on the Seismic Behavior of a Historical Structure

Buildings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 217
Author(s):  
Pınar Usta
Keyword(s):  
Seismic Behavior ◽  
Seismic Isolation ◽  
Structural Integrity ◽  
Base Isolation ◽  
Time History ◽  
Structural Deformation ◽  
Isolation Technique ◽  
Base Isolator ◽  
Fixed Base ◽  
Historical Masonry

The earthquake performance of structures with seismic isolation is much better than that of fixed-base structures, and the application of seismic insulation ensures both structural integrity and the protection of the items present in the structures. The base-isolation system is used to extend the fundamental period of vibration of the structure and to obtain higher value from base-isolated structures relative to the fixed-base structure. Historical masonry mosques could be strengthened using a base-isolation technique. In this study, a historical masonry mosque was organized and modelled using SAP2000 software. Nonlinear Time History analyses were carried out for the historical masonry structure, firstly for the fixed-base mosque and secondly for the base-isolated mosque with lead rubber bearing (LRB). The use of a base-isolator system caused an increase in the historical mosque’s period, reducing the displacements, acceleration, and force applied on the mosque and the resulting structural deformation; the results of the analysis indicate a significant improvement in the seismic behavior. The modelling results show that such historical masonry buildings (especially those with high and delicate minarets) can be vulnerable to major earthquakes, and it may be useful to examine strengthening strategies for these buildings.

Representation of information in SEM by equal signal lines

1978 ◽  
Vol 36 (1) ◽  
pp. 144-145
Author(s):  
E. Rau ◽  
N. Karelin ◽  
V. Dukov ◽  
M. Kolomeytsev ◽  
S. Gavrikov ◽  
...  
Keyword(s):  
Electronic System ◽  
Space Distribution ◽  
Specimen Surface ◽  
Universal Method ◽  
Base Level ◽  
Signal Value ◽  
Information Signal ◽  
Fixed Base ◽  
Scanning Line ◽  
Amplitude Analyzer

There are different methods and devices for the increase of the videosignal information in SEM. For example, with the help of special pure electronic [1] and opto-electronic [2] systems equipotential areas on the specimen surface in SEM were obtained. This report generalizes quantitative universal method for space distribution representation of research specimen parameter by contour equal signal lines. The method is based on principle of comparison of information signal value with the fixed levels.Transformation image system for obtaining equal signal lines maps was developed in two versions:1)In pure electronic system [3] it is necessary to compare signal U (see Fig.1-a), which gives potential distribution on specimen surface along each scanning line with fixed base level signals εifor obtaining quantitative equipotential information on solid state surface. The amplitude analyzer-comparator gives flare sport videopulses at any fixed coordinate and any instant time when initial signal U is equal to one of the base level signals ε.

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