Shaking table test and dynamic response prediction on an earthquake-damaged RC building

The study on lateral dynamic response of pile foundation in liquefiable soil is a significant part about seismic damage. In this paper, a new data acquisition system of FBG and calculation methods is used in the small shaking table test. The results show that FBG method used in this test is proved to be efficient and acceptable in both time characteristics and precision characteristics, it may be widely applied in the future doubtlessly. What’s more, the characteristics of p-y curves in different peak accelerations are discussed. And varying of maximum stress and displacement by corresponding acceleration is discussed. A contrast about p-y curve between dry sand and saturate sand is related, which provides a new direction in research about p-y curve.

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Shaking Table Tests for Seismic Response of Orthogonal Overlapped Tunnel under Horizontal Seismic Loading

Advances in Civil Engineering ◽

10.1155/2021/6633535 ◽

2021 ◽

Vol 2021 ◽

pp. 1-19

Author(s):

Honggang Wu ◽

Hao Lei ◽

Tianwen Lai

Keyword(s):

Dynamic Response ◽

Seismic Response ◽

Seismic Wave ◽

Shaking Table Test ◽

Shaking Table ◽

Shaking Table Tests ◽

Acceleration Response ◽

Test Device ◽

Deformation Stages ◽

Superposition Effect

This paper presents the seismic dynamic response and spectrum characteristics of an orthogonal overlapped tunnel by shaking table tests. First, a prototype of the engineering and shaking table test device, which was used to design details of the experiment, was developed. Then, the sensors used in the test were selected, and the measurement points were arranged. Subsequently, the Wenchuan seismic wave with horizontal direction in different peak ground accelerations was inputted into the model, followed by a short analysis of the seismic response of the overlapped tunnel in the shaking table test as well as the distribution of the peak acceleration. Throughout the studies, the model exhibited obvious deformation stages during the seismic wave loading process, which can be divided into elastic, plastic, plastic enhancement, and failure stage. In particular, the time- and frequency-domain characteristics of the key parts of the tunnel were discussed in detail by using the continuous wavelet transform (CWT) based on the Morlet wavelet as the basis function. We found that the acceleration response was more intense within 25–60 s after the seismic wave was inputted. Furthermore, owing to “the superposition effect,” the seismic response at the crown of the under-crossing tunnel was stronger than that at the invert of the upper-span tunnel. The low and medium frequencies in the transformation of small scales (5–20) significantly affected the overlapped tunnel. These results elucidate the seismic dynamic response of the overlapped tunnel and provide guidance for the design of stabilizing structures for reinforcing tunnels against earthquakes.

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Dynamic Response Characteristics of Aeolian Sediment along Sichuan-Tibet Railway

Architecture Engineering and Science ◽

10.32629/aes.v2i2.374 ◽

2021 ◽

Vol 2 (2) ◽

Author(s):

Kan Han ◽

Chunxiao Xue

Keyword(s):

Dynamic Response ◽

Ground Motion ◽

Shaking Table Test ◽

Soil Layer ◽

Time History ◽

Surface Displacement ◽

Shaking Table ◽

Aeolian Sand ◽

Response Characteristics ◽

Dynamic Response Characteristics

In order to reduce the damage of liquefaction of aeolian sand along the Sichuan-Tibet railway, the dynamic response characteristics of saturated aeolian sand in the study area were discussed by using shaking table test. The results show that the macroscopic characteristics of saturated aeolian sand in the study area are subsidence, water flow and fracture. The displacement time history shows that the surface displacement increases with increasing the input ground motion acceleration. When the acceleration is small (0.1g), the vibration in the soil layer has an obvious tendency to enlarge continuously from bottom to top. With the increase of the acceleration (0.2g), the amplification trend basically disappeared. When the acceleration increases to 0.3g, the ground motion increases first and then decreases.

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SSI Damping System Research Based on Discontinuity of the Motion

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.2144 ◽

2011 ◽

Vol 287-290 ◽

pp. 2144-2147 ◽

Cited By ~ 2

Author(s):

Zhi Ying Zhang ◽

Zhan Chao Gao ◽

Ying Li

Keyword(s):

Dynamic Response ◽

Dynamic System ◽

Soil Structure ◽

Shaking Table Test ◽

Shaking Table ◽

Soil Structure Interaction ◽

System Research ◽

Structure Interaction ◽

Linear Elastic ◽

Elastic Range

The Soil-Structure Interaction (SSI) Effect exists everywhere, but the existing researches on actual damping of SSI system are not so sufficient, and the analysis of its real dynamic response becomes unsuitable to engineering applications. In this paper, the possibility of regarding SSI system as classical damping system in linear elastic range is studied. The motion domains and the equation of the dynamic system in each domain are confirmed with respect to boundaries. The research on Shaking Table Test of SSI system is shown as an example of supporting the feasibility of regarding SSI system as classical damping system similarly.

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Shaking Table Test of Underground Pipeline under Three Dimension Seismic Excitation – Numerical Simulation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.919-921.960 ◽

2014 ◽

Vol 919-921 ◽

pp. 960-964 ◽

Cited By ~ 1

Author(s):

Xiao Fu ◽

Jun Wei Bi ◽

Zhi Jia Wang ◽

Chang Wei Yang

Keyword(s):

Numerical Simulation ◽

Dynamic Response ◽

Seismic Response ◽

Shaking Table Test ◽

Time History ◽

Shaking Table ◽

Seismic Excitation ◽

Underground Pipeline ◽

Three Dimension ◽

Seismic Structure

Based on the design of the large-scale shaking table test of an underground pipeline under three dimension seismic excitation, the dynamic response of the soil-structure is analyzed by using ANSYS. In the numerical simulation, Drucker-Prager constitutive model is adopted to simulate the soil, the interface between soil and pipeline are simulated with zero thickness contact elements, size effects of test box are diminished by defining viscoelastic boundary around soil, the acceleration time history curve of the original earthquake wave is compressed and processed according to using the model scale similarity and energy duration which is presented by Trifunac-Brady [1] , and then the characteristic of seismic response of the pipeline can be found. The results show that the top of pipeline is the seismic response intense regional, deformation displacements of the central areas at the bottom and top of pipeline are always larger than others, the entrance and exit are the weak positions of anti-seismic structure; moreover, the dynamic response and interactions of soil-pipeline in the model experiment can be more accurately simulated by the methods presented in the paper. Thus, it can be served as reference for the design and construction of subsurface structures.

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A Dynamic Behavior of the Frame Structure Allows the Columns to Uplift

Volume 8: Seismic Engineering ◽

10.1115/pvp2006-icpvt-11-93283 ◽

2006 ◽

Author(s):

Tadashi Mikoshiba ◽

Chikahiro Minowa ◽

Takanori Sato ◽

Li Shao ◽

Toshio Chiba

Keyword(s):

Dynamic Response ◽

Dynamic Behavior ◽

Shaking Table Test ◽

Shaking Table ◽

Frame Structure ◽

Structure Model ◽

Seismic Impact

To investigate the dynamic behavior of the frame structure which allows the columns to uplift, a shaking table test was conducted by using a 4-story frame structure model. The effect of the absence or presence of the uplift and the damper in the column on the dynamic behavior of the structure were clarified. Dynamic response of the traditional frame structure with damper was compared to that of structure with damper in the columns. By using damper in the columns, the seismic impact of the structure was controlled. It is confirmed that the frame structure which is allowed the columns to uplift has an adequate seismic ability.

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Effect analysis of burial depth on seismic dynamic response of metro station structure

E3S Web of Conferences ◽

10.1051/e3sconf/202014301009 ◽

2020 ◽

Vol 143 ◽

pp. 01009

Author(s):

Shuai Huang ◽

Yuejun Lyu ◽

Liwei Xiu ◽

Zhen Xu

Keyword(s):

Dynamic Response ◽

Failure Mode ◽

Shaking Table Test ◽

Element Model ◽

Shaking Table ◽

Burial Depth ◽

Metro Station ◽

Effect Analysis ◽

Dynamic Amplification ◽

Station Structure

In this article, based on the nonlinear elastic-plastic finite element model for metro station, considering the structure-soil dynamic interaction, the influence laws of the burial depth on the dynamic response and failure mode of the metro station structure under near and far-field earthquakes are studied. We found that the influence of burial depth on the deformation of the metro station may be omitted after a specific value of the burial depth. With the increasing of the burial depth, the acceleration dynamic amplification factors of the metro station structure decreses. At last, indoor shaking table test for metro station was done, through which we determined the position of initial failure and the failure mode of the metro station structure under earthquake.

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Dynamic Failure Mode and Dynamic Response of High Slope Using Shaking Table Test

Shock and Vibration ◽

10.1155/2019/4802740 ◽

2019 ◽

Vol 2019 ◽

pp. 1-19 ◽

Cited By ~ 10

Author(s):

Zhijun Zhou ◽

Chenning Ren ◽

Guanjun Xu ◽

Haochen Zhan ◽

Tong Liu

Keyword(s):

Dynamic Response ◽

Failure Modes ◽

Shaking Table Test ◽

Shaking Table ◽

Amplification Coefficient ◽

Seismic Load ◽

Dynamic Failure ◽

High Slope ◽

Amplification Effect ◽

Slope Line

A shaking table test was performed to study the dynamic response and failure modes of high slope. Test results show that PGA amplification coefficients increased with increasing elevation and the PGA amplification coefficient of the concave slope was slightly larger than that of the convex slope. The slope type affected the dynamic response of the slope. The elevation amplification effect of the concave slope under seismic load was more significant than that of the convex slope; thus, the concave slope was more unstable than the convex slope. Additionally, the PGA amplification coefficient measured on the slope surface was always larger than that inside the slope, and the data show an increasing trend with the broken line. The dynamic amplification effect of the high slope was closely related to the natural frequency of the slope. Within a certain range, the higher the frequency, the more significant the amplification effect. The dynamic failure process of concave and convex slopes was studied through tests. Findings indicate that the dynamic failure modes of the concave slope are characterized by shoulder collapse, formation of the sliding surface, and integral sliding above the slope line. Dynamic failure modes of the convex slope are mainly slips in the soil layer and collapse of the slope near the slope line.

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Study on Dynamic Response Characteristics and Damage Mechanism of Tunnel Lining at Entrance of Shallow Bias Tunnel

Shock and Vibration ◽

10.1155/2021/8930560 ◽

2021 ◽

Vol 2021 ◽

pp. 1-15

Author(s):

Lin Li ◽

Xiaodan Guo ◽

Zuyin Zou ◽

Zhanyuan Zhu ◽

Zihong Guo ◽

...

Keyword(s):

Dynamic Response ◽

Structural Damage ◽

High Speed ◽

Shaking Table Test ◽

Internal Force ◽

Tunnel Lining ◽

Shaking Table ◽

Response Characteristics ◽

Instability Problem ◽

Dynamic Response Characteristics

The structural damage of the lining structure at the entrance of a tunnel is the most common instability problem. The instability problem may cause dynamic effects such as earthquakes and blasting. Based on the seismic damage data collected from previous major earthquakes at the entrance of shallow-buried tunnel, the shaking table test and numerical simulation are used to analyze dynamic response characteristics and damage evolution characteristics of the tunnel in the shallow-buried hole at 30°. The study revealed the stress characteristics of tunnel lining and the mechanism of structural damage under earthquake excitation. The research results show that the biased tunnel (30°) is susceptible to damage on the unsymmetrical loading side, the biased ground surface leads to acceleration, and high speed also significantly increases the effect. The biased side leg of the tunnel lining cross section is a location with a large internal force distribution. The biased tunnel has a relatively unfavorable internal force value distribution and a larger peak, and the peak at the larger bias side has the largest peak value. The skewback and spandrel portion of the biased tunnel lining load are more likely to be damaged.

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Experimental Investigation on Dynamic Performance of Micro-Pile with Predrilled Oversize Hole on Shaking Table Test

Journal of Physics Conference Series ◽

10.1088/1742-6596/2148/1/012057 ◽

2022 ◽

Vol 2148 (1) ◽

pp. 012057

Author(s):

Laixiu Cheng ◽

Gumai Chen

Keyword(s):

Dynamic Response ◽

Shaking Table Test ◽

Dynamic Properties ◽

Dynamic Performance ◽

Shaking Table ◽

Inertia Force ◽

System Response ◽

Integral Abutment ◽

Inertial Interaction ◽

Predrilled Hole

Abstract For the situation of lacking research on micro-pile with predrilled oversize hole, the key part of semi-integral abutment bridge, the micro-pile-soil interaction shaking table test is carried out by considering the reaming pore diameter, depth, packing and other parameters in the end of the micro-pile to obtain the acceleration, pile moment, displacement and pile-system response frequency and other basic dynamic response and dynamic interaction law. Results show that: 1) the change of predrilled-hole parameters has litter effect on the dynamic properties of soil outside oversize hole; 2) The change of predrilled-hole parameters can cause the change of structural frequency, so led to the change of inertia force of pile head; 3) Inertial interaction has an important influence on the response of the upside part of pile and little influence in the downside part (lower than 15D). These conclusions will provide reference for dynamic response of interaction between pile with predrilled oversize hole and soil and make contribution to the practical application and designing of micro-pile with predrilled oversize hole.

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