Simulation of hybrid shaking table test of a three-story steel frame based on OpenFresco

In order to establish the systematic design method of performance-based earthquake engineering for steel-concrete hybrid structure tall buildings, a 1/15 scale model shaking table test is conducted in State Key Laboratory for Disaster Reduction in Civil Engineering of Tongji University. The dynamic property, acceleration and displacement response of the model structure under different earthquake levels are investigated from the test. The failure mode of structure is analyzed and the seismic response of the prototype structure is interpreted according to the similitude relation. The conclusions drawn from this investigation show that the prototype structure can basically satisfy the requirements of no damage under frequent earthquakes and no collapse under rare earthquakes; steel frame- concrete core structural system has good seismic performance under rare earthquake; and the damage of the connection between the steel frame beam and the core wall is the main failure pattern of the structure.

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Shaking Table Test for Evaluating the Seismic Performance of Steel Frame Retrofitted by Buckling-Restrained Braces

Shock and Vibration ◽

10.1155/2021/6654201 ◽

2021 ◽

Vol 2021 ◽

pp. 1-17

Author(s):

Tingting Wang ◽

Jianhua Shao ◽

Chao Zhao ◽

Wenjin Liu ◽

Zhanguang Wang

Keyword(s):

Seismic Performance ◽

Shear Force ◽

Seismic Waves ◽

Shaking Table Test ◽

Steel Frame ◽

Shaking Table ◽

Frame Structure ◽

Acceleration Response ◽

Buckling Restrained Brace ◽

Interstory Drift

To investigate the seismic performance of buckling-restrained braces under the earthquake action, the shaking table test with a two-story 1/4 scale model is carried out for the ordinary pure steel frame and the buckling-restrained bracing steel frame with low-yield-point steel as the core plate. The failure modes, dynamic characteristics, acceleration response, interstory drift ratio, strain, shear force, and other mechanical properties of those two comparative structures subjected to different levels of seismic waves are mainly evaluated by the experiment. The test results show that under the action of seismic waves with different intensities, the apparent observations of damage occur in the pure frame structure, while no obvious or serious damage in the steel members of BRB structure is observed. With the increase in loading peak acceleration for the earthquake waves, the natural frequency of both structures gradually decreases and the damping ratio gradually increases. At the end of the test, the stiffness degradation rate of the pure frame structure is 11.2%, while that of the buckling-restrained bracing steel frame structure is only 5.4%. The acceleration response of the buckling-restrained bracing steel frame is smaller than that of the pure steel frame, and the acceleration amplification factor at the second story is larger than that at the first story for both structures. The average interstory drift ratios are, respectively, 1/847 and 1/238 for the pure steel frame under the frequent earthquake and rare earthquake and are 1/3000 and 1/314 for the buckling-restrained bracing steel frame, which reveals that the reduction rate of lateral displacement reaches a maximum of 71.71% after the installation of buckling-restrained brace in the pure steel frame. The strain values at each measuring point of the structural beam and column gradually increase with the increase of the peak seismic acceleration, but the strain values of the pure steel frame are significantly larger than those of the buckling-restrained bracing steel frame, which indicates that the buckling-restrained brace as the first seismic line of defense in the structure can dramatically protect the significant structural members. The maximum shear force at each floor of the structure decreases with the increase in height, and the shear response of the pure frame is apparently higher than that of the buckling-restrained bracing structure.

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The Fracture Limit of Steel-Frame Members Under Dynamic Repeated Loads Through the Shaking Table Test

Volume 8: Seismic Engineering ◽

10.1115/pvp2018-84830 ◽

2018 ◽

Author(s):

Kensuke Shiomi ◽

Yusuke Wada

Keyword(s):

Plastic Deformation ◽

Dynamic Load ◽

Evaluation Method ◽

Shaking Table Test ◽

Seismic Analysis ◽

Steel Frame ◽

Shaking Table ◽

Test Results ◽

Structural Members ◽

Worst Case

Recently, much larger earthquakes are considered in the seismic designs of steel-frame structures in Japan. Under these severe ground motions, it is expected that not only the elasto-plastic deformation but also the fracture of the structural members could occur during the earthquakes. And through these situations, the more advanced seismic design or evaluation method which allow the partial destruction inside the structure and prevent from the worst-case scenario like the whole collapse are coming to be demanded. One of the ways to achieve this demand is considering the effects of not only the elasto-plastic deformation but also the fracture of structural members in the seismic analysis. In order for that, it is important to clarify the fracture limit of steel-frame members precisely under the dynamic load. Many static tests to clarify the members’ ultimate behavior were conducted in the past, but the dynamic tests were not well enough. In this research, the vibration tests were conducted to clarify the fracture limit of steel-frame members under the dynamic load. The behavior of the steel-frame members until the fracture was obtained by applying the repeated dynamic bending deformation with the shaking table. Also, The FEM analysis for the shaking table test results was conducted. Through the tests and the analysis study which simulates the test results, the mechanism of the member fracture occurred in the test under the dynamic loads were examined.

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

Journal of Structural and Construction Engineering (Transactions of AIJ) ◽

10.3130/aijs.72.125_3 ◽

2007 ◽

Vol 72 (620) ◽

pp. 125-132 ◽

Cited By ~ 2

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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Seismic Behavior Study of External Wall Panels in Steel Frames

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.1425 ◽

2011 ◽

Vol 243-249 ◽

pp. 1425-1428 ◽

Cited By ~ 2

Author(s):

Ming Ji Fang

Keyword(s):

Shaking Table Test ◽

Dynamic Properties ◽

Steel Frame ◽

Shaking Table ◽

Frame Structure ◽

External Wall ◽

Behavior Study ◽

Wall Panels ◽

Seismic Behaviors ◽

Steel Frame Structure

The shaking table test of a full-scale steel frame structure with ALC external wall panels is performed in this paper. Based on the experimental results, the seismic behaviors of ALC external walls and joints are studied, such as the destruction properties of ALC external walls and joints and the effects of external walls on the dynamic properties of steel frame. Several useful conclusions and suggestions are presented in the paper.

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