Investigation of Stability Alarming for Retaining Wall Structures with Damage

Xu, Qian

doi:10.1155/2017/4691947

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…In comparison with the WPT (the Wavelet Packet Transform), the method based on HHT (the Hilbert-Huang Transform) had good adaptivity to signals and was suitable for either linear signals or nonlinear ones. us far, the attention of damage identification to engineering structures were mainly paid to such structural components as beams [14], plates [15], piles [16], building structures [17,18], bridge structures [19,20], and other structures [21,22]. However, the investigation of damage identification to retaining wall structures was much rarer.…”

Section: Introductionmentioning

confidence: 99%

Damage Index Analysis of Retaining Wall Structures Based on the Impulse Response Function and Virtual Impulse Response Function

2021

Shock and Vibration

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To identify the damage within retaining wall structures, the Hilbert–Huang Transforms of the impulse response function and virtual impulse response function were performed. The Hilbert marginal energy ratio spectrums of the impulse response function and virtual impulse response function were acquired. To reflect damage information effectively, those bands with stronger damage sensitivity were extracted via the threshold value ε0. Then, the Hilbert feature bands, which were more sensitive to damage within retaining walls, were selected by considering the contribution of the residual band to the damage identification. Based on the feature bands, the Hilbert damage feature vector, which reflects the variations of Hilbert marginal energy ratio caused by damage, was created. Based on the damage feature vector, two damage identification indexes (the energy ration standard deviation and Energy Ration Standard Deviation), which were based on the impulse response function and virtual impulse response function, respectively, were proposed to identify damage within retaining walls. To investigate the validity of the damage indexes, vibration tests on a pile plate retaining wall were done. The test results show that the damage feature vector is a zero vector or the value of damage index is zero when the wall is undamaged. The damage feature vector is a nonzero vector or the value of the damage index is more than zero when the wall is damaged. Thus, the damage state of the wall can be detected sensitively via the damage feature vector or damage indexes. Partial damage causes greater fluctuation of trend surface of the damage index. The location of partial damage can be diagnosed validly via the coordinate of peak value in the trend surface. The quantitative relationship formula between the damage index and damage intensity is established. The damage intensity of the wall can be calculated reversely, when the damage index is available. Either the energy ration standard deviation or Energy Ration Standard Deviation can be used to detect the damage state, diagnose the damage location, and identify the damage intensity. In comparison with the energy ration standard deviation, the stability and damage sensitivity of the Energy Ration Standard Deviation is much better.

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Section: Introductionmentioning

confidence: 99%

Damage Index Analysis of Retaining Wall Structures Based on the Impulse Response Function and Virtual Impulse Response Function

2021

Shock and Vibration

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“…In addition, unlike static loads, the behavior of the ground differs under dynamic load conditions such as cyclic loading. In recent years, the change of earth pressure or earth pressure coefficient have been studied mainly through laboratory model tests or numerical analysis of the grounds with retaining walls or earth retaining walls [2][3][4][5][6]. A few studies have been conducted to assess the deformation of structures caused by dynamic loads such as railway loads.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Numerical Analysis of Displacement Restraining Effect of Inclined Earth-Retaining Structure during Embankment Construction

Son

Minsu

et al. 2019

Applied Sciences

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Retaining walls are generally used for temporary installations during the excavation process of a construction project. They are also utilized to construct embankments in order to extend a railway facility. In this case, a retaining wall is installed during the construction process and contributes to the resistance of large amounts of stress, including the railway load. However, it is generally difficult to retain walls to maintain their stability. Therefore, alternative construction methods, such as the use of an inclined earth-retaining wall, have been utilized to suppress the lateral displacement. The stability is verified in advance through field tests; however, the maximum stress acting on the railway is thought to be the concentrated railway load. In this study, a two-dimensional numerical analysis was conducted by changing the railway load to a dynamic load. The analysis was applied according to the number of H-piles of the same length (10 m) when only the front wall was installed and when a back support was also applied. It was determined that the lateral displacement of the latter case is smaller than that of the former, whereas the resistance to dynamic loading of the former case is greater.

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“…The methodology for determining the type and the scope of renovation works necessary to ensure the safety of the load-carrying structure for two selected retaining walls are presented in this paper. Moreover the aspect of ensuring the safety of use and operation of these building objects is included in the study [3,4,5]. The proposed methodology, consistent in both analyzed cases, should include the following steps [6,7,8]:…”

Section: Introductionmentioning

confidence: 99%

Analysis of retaining wall stability in areas specified in register of objects of cultural heritage

Chmielewski

2018

MATEC Web Conf.

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Abstract. The case study of the assurance of retaining wall stability in densely urbanized conservation and cultural heritage areas are described in this paper. During The Second World War many of these historic buildings in Warsaw were completely or partially destroyed and until these days their remains constitute elements of the existing building development of the capital of Poland. This may be connected with a change in the nature of applied loads as well as current functions of these buildings. The results of expert opinions and investigations are presented, regarding the operational and technical state of two retaining walls submitted to an expert before the repair works. When designing the design concept, both the historic character of structures, the technical feasibility of performing construction works in the densely urbanized area, as well as determined water and ground conditions were considered. The first of the analysed cases concerns the retaining wall localised in the vicinity of the Ordynacka Street and the Tamka street. After analysing the historical aerial photographs, it was found that the retaining wall constitutes an underground part of the apartment house destroyed during the warfare. The second case study refers to Warsaw Old Town -the retaining wall ensuring the stability of the Vistula escarpment along Brzozowa Street in Warsaw.

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Investigation of Stability Alarming for Retaining Wall Structures with Damage

Cited by 6 publications

References 19 publications

Damage Index Analysis of Retaining Wall Structures Based on the Impulse Response Function and Virtual Impulse Response Function

Damage Index Analysis of Retaining Wall Structures Based on the Impulse Response Function and Virtual Impulse Response Function

Dynamic Numerical Analysis of Displacement Restraining Effect of Inclined Earth-Retaining Structure during Embankment Construction

Analysis of retaining wall stability in areas specified in register of objects of cultural heritage

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