scholarly journals Effect of Soil Box Boundary Conditions on Dynamic Behavior of Model Soil in 1 g Shaking Table Test

2020 ◽  
Vol 10 (13) ◽  
pp. 4642
Author(s):  
Hoyeon Kim ◽  
Daehyeon Kim ◽  
Yonghee Lee ◽  
Haksung Kim
Keyword(s):  
Boundary Conditions ◽  
Shaking Table Test ◽  
Shaking Table ◽  
Boundary Effects ◽  
Soil Behavior ◽  
Ground Acceleration ◽  
Various Boundary Conditions ◽  
Model Soil ◽  
Shear Box ◽  
Laminar Shear

In order to evaluate the effects of soil box boundary conditions on the dynamic soil behavior, the Rigid Box (RB) and the Laminar Shear box (LSB) were constructed and 1 g shaking table tests were carried out for various boundary conditions. The boundary effects of the RB and the LSB were compared. To reduce the boundary effects of the RB, sponges, 5 cm, 10 cm, and 15 cm in thickness, were attached to the two end sides of the RB. A model soil was constructed on flat ground, and the acceleration and amplification occurring in the center of the soil were analyzed by spectrum and peak ground acceleration. Compared with the RB, the center and wall accelerations of LSB were very close to each other. This implies that the LSB can better simulate the behavior of the infinite half space than the RB.

Improvement of Laminar Shear Container for Shaking Table Test

2012 ◽  
Vol 588-589 ◽  
pp. 1889-1893
Author(s):  
Hai Feng Sun ◽  
Li Ping Jing ◽  
Qing Hai Wei ◽  
Xian Chun Meng
Keyword(s):  
Soil Structure ◽  
Shaking Table Test ◽  
Boundary Effect ◽  
Underground Structure ◽  
Dynamic Interaction ◽  
Shaking Table ◽  
Important Method ◽  
Model Soil ◽  
Structure Dynamic ◽  
Laminar Shear

Shaking table test is an important method to study on the problem of the soil-structure dynamic interaction. The property of the soil container directly affects the accuracy of the result. A laminar shear container was designed for shaking table test. And a shaking table test on soil-underground structure dynamic interaction which structure lay in clay was conducted. The results of the test show that the container eliminated the boundary effect when the dynamic load was applied in only one horizontal direction. Meanwhile, the stiffness of the soil container could be changed according to the change of the model soil, which is applicable to decrease the boundary effect.

scholarly journals Seismic Response of Flat Ground and Slope Models through 1 g Shaking Table Tests and Numerical Analysis

2021 ◽  
Vol 11 (4) ◽  
pp. 1875
Author(s):  
Yong Jin ◽  
Hoyeon Kim ◽  
Daehyeon Kim ◽  
Yonghee Lee ◽  
Haksung Kim
Keyword(s):  
Numerical Analysis ◽  
Seismic Waves ◽  
Shaking Table Test ◽  
Time History ◽  
Shaking Table ◽  
Numerical Analyses ◽  
Shaking Table Tests ◽  
Shear Box ◽  
Laminar Shear ◽  
Flat Ground

In order to verify the reliability of numerical analysis, a series of 1 g shaking table tests for flat ground and slope were conducted using a laminar shear box subjected to different seismic waves. Firstly, numerical analyses, using the DEEPSOIL and ABAQUS software, were done to compare the results of flat ground experiments. After that, finite element analyses with ABAQUS were conducted to compare the results of slope experiments. For numerical analyses, considering the influence of the boundary, the concept of adjusted elastic modulus was proposed to improve the simulation results. Based on the analyses, it is found that in terms of acceleration-time history and spectral acceleration, the numerical analysis results are in good agreement with the experiment results. This implies that numerical analysis can capture the dynamic behavior of soil under 1 g shaking table test conditions.

scholarly journals Shaking Table Test on the Response of a Cross Interchange Metro Station under Harmonic Excitations Refers to a Single Two-Storey Metro Station

2021 ◽  
Vol 11 (4) ◽  
pp. 1551
Author(s):  
Shiping Ge ◽  
Weifeng Wu ◽  
Wenqi Ding ◽  
Yong Yuan
Keyword(s):  
Large Scale ◽  
Shaking Table Test ◽  
Shaking Table ◽  
Galvanized Steel ◽  
Seismic Excitations ◽  
Metro Station ◽  
Model Soil ◽  
Seismic Motion ◽  
Single Station ◽  
Parallel Tests

Interchange is essential in a metro network. Regarding the seismic performance, a series of large-scale shaking table tests were performed on an interchange station. The interchange station was composed of a two-story section rigidly connected to a perpendicular three-story section, leading to an abrupt change of stiffness in the conjunction area. Synthetic model soil (a mixture of sand and sawdust) and granular concrete with galvanized steel wires were used to model the soil–structure system. The seismic motion was input along the transversal direction of the two-story structure, including white noise and sinusoidal seismic excitations. Parallel tests of a single two-story station were correspondingly carried out as a contrast. Test data recorded by accelerometers and strain gauges are presented. The bending strains of the columns measured in the interchange station were found to be smaller than those in the single station. The concentration of the longitudinal strain was observed near the conjunction. Insights on the seismic response of the interchange station are provided.

Fabrication and Testing of a Laminar Shear Soil Box for a Shaking-Table Test

2021 ◽  
Vol 26 (4) ◽  
pp. 04021030
Author(s):  
Weidan Shi ◽  
Weien Chen ◽  
Youqin Lin ◽  
Yingxiong Wu
Keyword(s):  
Shaking Table Test ◽  
Shaking Table ◽  
Laminar Shear

Seismic response of a light steel structure integrated building with steel mortise–tenon connections

2018 ◽  
Vol 22 (5) ◽  
pp. 1225-1237 ◽  
Author(s):  
Nianqiang Zhou ◽  
Weixing Shi ◽  
Jiazeng Shang
Keyword(s):  
Shaking Table Test ◽  
Damping Ratio ◽  
Dynamic Performance ◽  
Steel Structure ◽  
Shaking Table ◽  
Scale Model ◽  
Test Model ◽  
Seismic Behaviour ◽  
Ground Acceleration ◽  
House Structure

Mortise–tenon joints play a crucial role in traditional timber structures to resist service and earthquake loading. In this work, the steel mortise–tenon connection from a traditional timber house was extracted and developed for a lightweight steel structure integrated building. This article presents a study on the dynamic performance of an integrated steel house with steel mortise–tenon connections. A shaking table test was conducted with a full-scale model and various excitation intensities. Various parameters, including the natural frequency, the equivalent stiffness of the structure, the structural damping ratio, the acceleration response and the displacement response, were analysed and discussed. In the test, the model frequencies decreased from 15.19 to less than 13.38 Hz, while the damping ratio increased by 32.6%. The test model survived all the input earthquake excitations (peak ground acceleration of up to 1.0 g) with only minor damage, indicating the good seismic resilience of the building. The test results demonstrate that the integrated house structure with steel mortise–tenon connections is a good solution for withstanding earthquakes. An integrated structure bounded by a steel mortise–tenon system with proper design typically exhibits good seismic behaviour and can resist earthquake under different seismic levels in practice.

Theory Study on Similitude Design of Shaking Table Tests of Earthquake-Induced Landslide

2013 ◽  
Vol 353-356 ◽  
pp. 2294-2300
Author(s):  
Chun Jing Lai ◽  
Yan Peng Zhu ◽  
Chun Qing Wang ◽  
Tian Zhong Ma
Keyword(s):  
Shaking Table Test ◽  
Shaking Table ◽  
Engineering Properties ◽  
Shaking Table Tests ◽  
Seismic Parameters ◽  
Model Soil ◽  
Dynamic Similitude ◽  
Main Factors ◽  
Main Factor ◽  
Properties Of Soil

Based on analysis of characteristics of earthquake-induced landslides and summary of main factors of controlling earthquake-induced landslides, three main factors which are seismic parameters, topography and landforms features and engineering properties of soil are considered the main factor affecting on earthquake-induced landslides. These factors should be focused on to meet the similitude ratio design of the dynamics of landslide in Shaking table test design. Based on study of dynamic similitude law of landslide, the method of changing model soil specifications is used to prepare the model soil which is in accordance with the maximum shear modulus of prototype soil. Also, the engineering properties similitude of model soil is checked by the method of shear wave velocity similitude. By taking the theory of vibration behavior theory of similarity and dynamic failure similar, the formula of dynamic parameters similitude ratio was got. This formula provides calculating methods using shaking table test to simulate earthquake induced landslide.

Shaking Table Test on Seismic Performance of L- and V-Sectioned Reinforced Concrete Columns

2015 ◽  
Vol 09 (04) ◽  
pp. 1550010
Author(s):  
Xuan-Huy Nguyen ◽  
Xuan-Dat Pham ◽  
Xuan-Chieu Luong
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Shaking Table Test ◽  
Absorption Capacity ◽  
Shaking Table ◽  
Experimental Program ◽  
Ground Acceleration ◽  
Cross Sectional ◽  
Response Characteristics ◽  
Current Test

This paper presents an experimental program to investigate the effects of cross-sectional shape on the seismic performance of irregularly shaped reinforced concrete (RC) columns. Five groups of specimens that were one-quarter of typical columns of a prototype medium-rise building were tested to failure using shaking table. The loading procedure was successively increasing peak ground acceleration until the test structure collapsed. The specimens were designed with the same cross-section area but different flange width and flange thickness. The seismic response characteristics of all specimens such as drift capacity, energy absorption capacity and failure mechanisms of each specimen group are evaluated, compared and discussed in detail. Based on the current test data, design recommendation is provided to assist engineers in designing such irregularly shaped columns.

scholarly journals Shaking table test on the seismic response of the portal section in soft and hard rock junction

2021 ◽  
Vol 104 (3) ◽  
pp. 003685042110313
Author(s):  
Guangyao Cui ◽  
Jianfei Ma
Keyword(s):  
Seismic Response ◽  
Contact Stress ◽  
Hard Rock ◽  
Shaking Table Test ◽  
Soft Rock ◽  
Active Regions ◽  
Shaking Table ◽  
Inertia Force ◽  
Ground Acceleration ◽  
Seismic Safety

Tunnel portal sections located in the soft-hard rock junction are vulnerable to the strong earthquake motions in seismically active regions. The main objective of this paper is to investigate the seismic response of tunnel portals located in the soft-hard rock junction. Taking the Baiyunding tunnel in northeast China as a background, a shaking table test with a geometric scaling ratio of 1:30 was built. Details of test setup and procedures are introduced first and then the test results are presented. The discussion of the results is based on the peak ground acceleration (PGA), the longitudinal, the contact stress, and the safety factor. The results show that the soft section of the soft-hard rock junction suffers remarkable damages under strong seismic motions, while the hard rock section is less affected by earthquakes. The increasing soft rock range causes a rise of the forced displacement of tunnel linings, which, together with the seismic inertia force, leads to the increase of the contact stress of the linings, and ultimately resulting in the deterioration of the tunnel seismic safety. To mitigate the seismic damage of tunnel portals in the soft-hard rock junction, rock grouting, bolt support, and other effective reinforced methods should be considered in the seismic design of the soft section.

scholarly journals A Large Biaxial Shear Box for Shaking Table Test on Saturated Sand

2006 ◽  
Vol 29 (1) ◽  
pp. 12649 ◽  
Author(s):  
L David Suits ◽  
TC Sheahan ◽  
T-S Ueng ◽  
M-H Wang ◽  
M-H Chen ◽  
...  
Keyword(s):  
Shaking Table Test ◽  
Shaking Table ◽  
Saturated Sand ◽  
Shear Box
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