Shaking table test of a frame structure retrofitted by externally-hung rocking wall with SMA and disc spring self-centering devices

2021 ◽  
Vol 240 ◽  
pp. 112422
Author(s):  
Xiangmin Li ◽  
Fuwen Zhang ◽  
Zhuolin Wang ◽  
Kun Tian ◽  
Jinzhi Dong ◽  
...  
Keyword(s):  
Shaking Table Test ◽  
Shaking Table ◽  
Frame Structure ◽  
Rocking Wall ◽  
Disc Spring

scholarly journals Seismic Response of Prestressed Anchors with Frame Structure

2020 ◽  
Vol 2020 ◽  
pp. 1-15 ◽  
Author(s):  
Shuaihua Ye ◽  
Zhuangfu Zhao
Keyword(s):  
Seismic Response ◽  
Shaking Table Test ◽  
Coupling Effect ◽  
Soil Mass ◽  
Calculation Model ◽  
Shaking Table ◽  
Frame Structure ◽  
Dynamic Calculation ◽  
Concentrated Mass ◽  
Linear Spring

Based on the equivalent mass-spring model and considering the coupling effect between creep soil and prestressed anchors, the dynamic calculation model of prestressed anchors with frame structure is established. The soil mass is expressed in the form of concentrated mass. The action of the frame structure on the soil is treated as a parallel coupling of a linear spring and a linear damper, and the free section of the anchor is treated as a linear spring. Considering the creep characteristics, the soil is regarded as a Generalized Kelvin body and the anchoring section of the anchor is regarded as an equivalent spring body, which are coupled in parallel. Considering the effect of slope height, the dynamic calculation model is solved and the seismic response is analyzed. Finally, an engineering example is used to verify the calculation method in this paper, and the results are compared with the shaking table test and numerical simulation. It shows that the calculation model proposed in this paper is safe and reasonable for the seismic design and analysis of the slope supported by prestressed anchors with frame structure.

Shaking table test for externally-hung self-centering rocking wall structure

2020 ◽  
Author(s):  
Xiangmin Li ◽  
Fuwen Zhang ◽  
Kun Tian ◽  
Zhuolin Wang ◽  
Lu Jiang ◽  
...  
Keyword(s):  
Shaking Table Test ◽  
Shaking Table ◽  
Wall Structure ◽  
Rocking Wall

Shaking Table Test of Passive Controlled Structure With New Friction Damper

2007 ◽  
Author(s):  
Tadashi Mikoshiba ◽  
Chikahiro Minowa ◽  
Takanori Sato ◽  
Li Shao ◽  
Toshio Chiba
Keyword(s):  
Shaking Table Test ◽  
Large Earthquake ◽  
Shaking Table ◽  
Frame Structure ◽  
Friction Damper ◽  
Damping Characteristics ◽  
High Tension ◽  
Test Frame ◽  
Controlled Structure ◽  
Energy Dissipation Devices

Under the effect of a large earthquake, the range of plastic comes into the column and the beam of the frame structure. By using energy dissipation devices, it is possible to reduce the response and the damage of the structure. A friction type damper which was a compact form and had high damping characteristics, was developed. It was made of steel plate, aluminum sliding plate, rubber washer and high tension bolt. To validate the performance of the new damper, the elemental tests and the shaking table test were conducted. In the shaking table test, frame structure composed of full scale member with friction damper was excited by actual seismic wave. As a result, it was found effective and had a high damping performance. This paper mainly reports the results of the shaking table test.

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

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.

scholarly journals SHAKING TABLE TEST OF SEMI-RIGID TIMBER FRAME STRUCTURE WITH OIL DAMPER

2016 ◽  
Vol 81 (729) ◽  
pp. 1859-1868
Author(s):  
Masatoshi SHINOHARA ◽  
Hiroshi ISODA ◽  
Hidemaru SHIMIZU
Keyword(s):  
Shaking Table Test ◽  
Shaking Table ◽  
Frame Structure ◽  
Timber Frame

scholarly journals Shaking Table Substructure Testing Based on Three-Variable Control Method with Velocity Positive Feedback

2020 ◽  
Vol 10 (16) ◽  
pp. 5414
Author(s):  
Guoshan Xu ◽  
Zhen Wang ◽  
Yintong Bao ◽  
Ge Yang ◽  
Bin Wu
Keyword(s):  
Positive Feedback ◽  
Shaking Table Test ◽  
Control Method ◽  
Shaking Table ◽  
Displacement Velocity ◽  
Frame Structure ◽  
Control Mode ◽  
Variable Control ◽  
Stability And Accuracy ◽  
Control Accuracy

To improve the experimental accuracy and stability of shaking table substructure testing (STST), an explicit central difference method (CDM) and a three-variable control method (TVCM) with velocity positive feedback (VPF) are proposed in this study. First, the explicit CDM is presented for obtaining an improved control accuracy of the boundary conditions between the numerical and experimental substructures of STST. Compared with the traditional CDM, the proposed method can provide explicit control targets for displacement, velocity, and acceleration. Furthermore, a TVCM-VPF is proposed to improve the control stability and accuracy for loading the explicit control targets of displacement, velocity, and acceleration. The effectiveness of the proposed methods is validated by experiments on a three-story frame structure with a tuned liquid damper loaded on an old shaking table originally designed with the traditional displacement control mode. The experimental results show that the proposed explicit CDM works well, and the response rate and control accuracy of the shaking table are significantly improved with the contribution of the TVCM-VPF compared with those of the traditional proportional integral derivative (PID) controller. This indicates the advantage of the proposed TVCM-VPF over the traditional PID for STST. A comparison between the traditional shaking table test and STST shows that when the latter is based on the TVCM-VPF, it exhibits an excellent performance in terms of the stability and accuracy of displacement and an acceptable performance in terms of the acceleration accuracy.

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

Seismic Behavior Study of External Wall Panels in Steel Frames

2011 ◽  
Vol 243-249 ◽  
pp. 1425-1428 ◽  
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.

Experimental and Simulation Study of a Hybrid Frame Structure with Viscous Dampers

2012 ◽  
Vol 446-449 ◽  
pp. 894-899
Author(s):  
Hong Mei Zhang ◽  
Xi Lin Lu ◽  
Chun Guang Meng
Keyword(s):  
Shaking Table Test ◽  
Time History ◽  
Shaking Table ◽  
Frame Structure ◽  
Nonlinear Time History Analysis ◽  
Seismic Action ◽  
Test Model ◽  
Viscous Dampers ◽  
Scaled Model ◽  
Nonlinear Simulation

A Concrete-filled Rectangular Steel Tube (CRST) frame structure is studied in this paper by shaking table model test and nonlinear simulation. A number of viscous dampers are employed to insure the function of the building especially under seismic action for some of the main vertical elements of the building are not continuous. A shaking table test of a scaled model was conducted under different earthquake waves to investigate the structural behavior. And the nonlinear time-history analysis for the shaking table test model was also carried out by finite element analysis program according to the shaking table test. The simulation model was constructed in accordance with the tested specimen and the simulation effect was then validated by the tested results. To sum up, (1) there are no obvious weak stories on the damping equipped structure; (2) the dampers can reduce the displacement of the irregular to a certain degree.

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