scholarly journals COLLAPSE BEHAVIOR AND ULTIMATE EARTHQUAKE RESISTANCE OF WEAK COLUMN TYPE MULTI STORY STEEL FRAME UNDER BI-AXIAL GROUND MOTION

2011 ◽  
Vol 76 (662) ◽  
pp. 837-844 ◽  
Author(s):  
Satoshi YAMADA ◽  
Yuko SHIMADA
Keyword(s):  
Ground Motion ◽  
Steel Frame ◽  
Earthquake Resistance ◽  
Column Type ◽  
Collapse Behavior

Dynamic Characteristics of Base-Isolated Steel Frame under Seismic Ground Motion

2011 ◽  
Vol 255-260 ◽  
pp. 2341-2344
Author(s):  
Mohammad Saeed Masoomi ◽  
Siti Aminah Osman ◽  
Ali Jahanshahi
Keyword(s):  
Ground Motion ◽  
Base Isolation ◽  
Time History ◽  
Steel Structure ◽  
Steel Structures ◽  
Steel Frame ◽  
Nonlinear Time History Analysis ◽  
Seismic Load ◽  
Vector Method ◽  
Seismic Ground Motion

This paper presents the performance of base-isolated steel structures under the seismic load. The main goals of this study are to evaluate the effectiveness of base isolation systems for steel structures against earthquake loads; to verify the modal analysis of steel frame compared with the hand calculation results; and development of a simulating method for base-isolated structure’s responses. Two models were considered in this study, one a steel structure with base-isolated and the other without base-isolated system. The nonlinear time-history analysis of both structures under El Centro 1940 seismic ground motion was used based on finite element method through SAP2000. The mentioned frames were analyzed by Eigenvalue method for linear analysis and Ritz-vector method for nonlinear analysis. Simulation results were presented as time-acceleration graphs for each story, period and frequency of both structures for the first three modes.

Collapse behavior evaluation of asymmetric buildings subjected to bi-directional ground motion

2015 ◽  
Vol 24 (8) ◽  
pp. 607-628 ◽  
Author(s):  
Salar Manie ◽  
Abdoreza S. Moghadam ◽  
Mohsen Ghafory-Ashtiany
Keyword(s):  
Ground Motion ◽  
Asymmetric Buildings ◽  
Collapse Behavior

Experimental Research on the Frictional Effects of the Slide-Roof System

2014 ◽  
Vol 584-586 ◽  
pp. 2105-2108
Author(s):  
Li Ming Zhang ◽  
Zhi Chang Tian
Keyword(s):  
Ground Motion ◽  
Experimental Research ◽  
Vibration Reduction ◽  
Static Friction ◽  
Steel Frame ◽  
Shaking Table ◽  
Roof System ◽  
Frictional Effects

<p>The experiments of a five-story steel frame on shaking table verify that the slide-roof system can markedly reduce vibration. When the ground motion is strong, the vibration reduction is effective and the influence from the static friction is little. The experiments show that this slide-roof system possesses good robustness to its friction.</p>

Beam-Mode Buckling of Buried Pipeline Subjected to Seismic Ground Motion

2012 ◽  
Author(s):  
Masaki Mitsuya ◽  
Takashi Sakanoue ◽  
Hiroyuki Motohashi
Keyword(s):  
Finite Element ◽  
Ground Motion ◽  
Critical Strain ◽  
Peak Load ◽  
Earthquake Resistance ◽  
Past Study ◽  
Buried Pipeline ◽  
Buried Pipelines ◽  
Seismic Ground Motion ◽  
Beam Mode

During seismic events, buried pipelines are subjected to deformation by seismic ground motion. In such cases, it is important to ensure the integrity of the pipeline. Both beam-mode and shell-mode buckling may occur in the event of compressive loading induced by seismic ground motion. In this study, the beam-mode buckling of a buried pipeline that occurred after the 2007 Niigataken Chuetsu-oki earthquake in Japan is investigated. A simple formula for estimating the critical strain, which is the strain at the peak load, is derived, and the formula is validated by finite-element analysis. In the formula, the critical strain increases with the pipeline diameter and hardness of the surrounding soil. By comparing the critical strain derived in this study for beam-mode buckling with the critical strain derived in a past study for shell-mode buckling, the formula facilitates the selection of the mode to be considered for evaluating the earthquake resistance of a pipeline. In addition to the critical strain, a method to estimate the deformation caused by seismic ground motion is proposed; the method can be used to evaluate the earthquake resistance of buried pipelines. This method uses finite-element analyses, and the soil–pipe interaction is considered. This method is used to reproduce the actual beam-mode buckling observed after the Niigataken Chuetsu-oki earthquake, and the earthquake resistance of a buried pipeline with general properties is evaluated as an example.

SHAKING TABLE TEST ON COLLAPSE BEHAVIOR OF SMALL-SCALE STEEL FRAME STRUCTURE

2007 ◽  
Vol 72 (620) ◽  
pp. 125-132 ◽  
Author(s):  
Yuko SHIMADA ◽  
Motoki AKAZAWA ◽  
Yosuke ITO ◽  
Yuichi MATSUOKA ◽  
Satoshi YAMADA ◽  
...  
Keyword(s):  
Shaking Table Test ◽  
Steel Frame ◽  
Shaking Table ◽  
Frame Structure ◽  
Small Scale ◽  
Collapse Behavior ◽  
Steel Frame Structure
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