Seismic responses of the steel-strip reinforced soil retaining wall with full-height rigid facing from shaking table test

The expansive polystyrene granule cement (EPSC) latticed concrete wall is a new type of energy-saving wall material with load-bearing, insulation, fireproof, and environmental protection characteristics. A series of shaking table tests were performed to investigate the seismic behavior of a full-scale reinforced concrete (RC) frame with EPSC latticed concrete infill wall, and data obtained from the shaking table test were analyzed. The experimental results indicate that the designed RC frame with EPSC latticed concrete infill wall has satisfactory seismic performance subjected to earthquakes, and the seismic responses of the model structure are more sensitive to input motions with more high frequency components and long duration. The EPSC latticed concrete infill wall provided high lateral stiffness so that the walls can be equivalent to a RC shear wall. The horizontal and vertical rebar, arranged in the concrete lattice beam and column, could effectively restrain the latticed concrete infill wall and RC frame. To achieve a more comprehensive evaluation on the performance of the RC frame with latticed concrete infill walls, further research on its seismic responses is expected by comparing with conventional infill walls and nonlinear analytical method.

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Shaking Table Study on the Seismic Performance of Geogrid Reinforced Soil Retaining Walls

Advances in Civil Engineering ◽

10.1155/2021/6668713 ◽

2021 ◽

Vol 2021 ◽

pp. 1-16

Author(s):

Xiaoguang Cai ◽

Sihan Li ◽

Honglu Xu ◽

Liping Jing ◽

Xin Huang ◽

...

Keyword(s):

Friction Coefficient ◽

Fundamental Frequency ◽

Retaining Wall ◽

Failure Surface ◽

Reinforced Soil ◽

Shaking Table ◽

Seismic Load ◽

Peak Displacement ◽

Acceleration Amplification ◽

Reinforcement Strain

This study presents experimental results from shaking table tests on a reduced-scale geogrid reinforced soil retaining wall (RSRW) to investigate the seismic response of the fundamental frequency, acceleration amplification, face displacement, backfill surface settlement, and reinforcement strain under different peak accelerations and durations. The fundamental frequency is in good agreement with the predicted values. The root mean square (RMS) acceleration amplification factors increase nonlinearly with the wall height and decrease with increasing seismic load, which is not regarded as a constant value. The distributions of the peak displacement are consistent with those of the residual displacement. The combination of the sliding and rotation is observed as the predominant mode of displacement, and the rotation mode is dominant. The positions near the face (35 cm) and the ends of the reinforcement (140 cm) demonstrated larger settlement than that of the central position (70 cm and 105 cm). The reinforcement strain increased with increasing peak acceleration and maximum values measured at the central layers. The trends of the potential failure surface are similar to those of the 0.3H bilinear failure surface. The friction coefficient is nonlinearly distributed along with the reinforcements, and the maximum friction coefficient appears at the top layer (F11).

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Numerical simulation and shaking table test of geotextile bag retaining wall structure

Environmental Earth Sciences ◽

10.1007/s12665-019-8503-x ◽

2019 ◽

Vol 78 (16) ◽

Cited By ~ 2

Author(s):

Eun Chul Shin ◽

Hee Soo Shin ◽

Jeong Jun Park

Keyword(s):

Numerical Simulation ◽

Shaking Table Test ◽

Retaining Wall ◽

Shaking Table ◽

Wall Structure ◽

Geotextile Bag

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SHAKING TABLE TEST ON ASEISMATIC PERFORMANCE IMPROVEMENT OF BLOCK RETAINING WALL BY SOIL NAILING METHODS

Geosynthetics Engineering Journal ◽

10.5030/jcigsjournal.34.169 ◽

2019 ◽

Vol 34 (0) ◽

pp. 169-174

Author(s):

Yasuyuki NABESHIMA ◽

Shigemasa MURAI

Keyword(s):

Performance Improvement ◽

Shaking Table Test ◽

Retaining Wall ◽

Shaking Table ◽

Soil Nailing

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Seismic Responses of GRS Walls with Secondary Reinforcements Subjected to Earthquake Loading

Applied Sciences ◽

10.3390/app10207084 ◽

2020 ◽

Vol 10 (20) ◽

pp. 7084

Author(s):

Chih-Hsuan Liu ◽

Ching Hung

Keyword(s):

Large Scale ◽

Numerical Procedure ◽

Secondary Reinforcement ◽

Reinforced Soil ◽

Primary Reinforcement ◽

Shaking Table ◽

Seismic Responses ◽

Geosynthetic Reinforced Soil ◽

Acceleration Amplification ◽

Vertical Spacing

Secondary reinforcement has been proven to be effective in increasing the performance of geosynthetic-reinforced soil (GRS) walls under working stress conditions, enabling an eco-friendlier environment. However, the seismic responses of GRS walls with secondary reinforcements are still unclear. In this study, in-depth finite element analyses were used to investigate the seismic responses of GRS walls with secondary reinforcement subjected to earthquake motions. The numerical procedure was first validated using measurements obtained from both a field GRS wall with secondary reinforcement and benchmark large-scale shaking table tests. Then, the validated GRS walls procedure was utilized to explore the effects of secondary reinforcement length and stiffness, the vertical spacing of the primary reinforcement, and wall height on the seismic responses. Based on the study, the following findings can be drawn: (i) the secondary reinforcement length and stiffness under various wall heights and peak ground accelerations (PGAs) have a limited influence on the relative lateral facing displacement and acceleration amplification, however, they can significantly decrease the connection load and the maximum reinforcement load; (ii) increasing the length of the secondary reinforcement is more effective for reducing the connection load and the maximum reinforcement load than increasing the stiffness of the secondary reinforcement; (iii) the effect of secondary reinforcement is more evident for greater wall height, the larger vertical spacing of primary reinforcement, and smaller PGA; and (iv) GRS walls with secondary reinforcement could ease the acceleration amplification. The study has highlighted the salient effect of secondary reinforcement on GRS wall performance under seismic conditions.

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Experimental Investigation on Mid-Story Isolated Structures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.4014 ◽

2010 ◽

Vol 163-167 ◽

pp. 4014-4021

Author(s):

Xiang Yun Huang ◽

Fu Lin Zhou ◽

She Liang Wang ◽

Liu Han Wen Heisha ◽

Xue Hai Luo

Keyword(s):

Dynamic Characteristics ◽

Shaking Table Test ◽

Base Isolation ◽

Shaking Table ◽

Dynamic Responses ◽

Seismic Responses ◽

Isolation Technique ◽

Vertical Stiffness ◽

Isolation Layer ◽

Rubber Bearings

Isolation technique has been acceded as a part of the China Seismic Code for Design of Buildings. In this code, the limitations for using isolation design are very strict, superstructure must be regular and the isolation layer must be located on the top of base (base isolated structure). Because of the needs of architecture and function or the feasibility of technique, some limitations have been broken in recent projects. Sometimes isolated layer can be set on the intermediate story, so-called the mid-story isolated structure. According to the characteristic of structure, isolation layer of mid-story isolated structure is set on a place where the structure’s vertical stiffness is suddenly changed, as like the top of the first story, middle story, conversion story of the structure. Laminated rubber bearings (LRB) are adopted as an isolation layer. Because the isolation layer is set on intermediate story, the whole structure is divided into superstructure and substructure; the structure’s dynamic characteristics are changed. The mechanism of mid-story isolated structure appears different characteristic compared with base isolation. The aim of mid-story isolation is not only to reduce seismic responses of superstructure, but also to reduce seismic responses of the substructure. Theoretical analysis and the shaking table test of the mid-story isolated structure were carried. And the response of mid-story isolated structure is discussed by comparing with the response of base-isolated structure and base fixed structure. The key problems of mid-story isolated structure are the force condition and the interaction of the structure up and below the isolation layer. Many factors, such as the number of story, mass, stiffness of superstructure and substructure, parameter of the isolation layer, have influence on the seismic behavior of the mid-story isolated structure. The optimum combination relationship of these factors is presented and dynamic characteristics and dynamic responses are investigated.

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