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Seismic Performance of Gravity Retaining Walls Considering the Passive Soil at the Front Side
https://orcid.org/http://orcid.org/0000-0002-9071-5418
There are many reasons to make behavior and performance of retaining walls during earthquakes difficult to evaluate, for example complex response of soil under dynamic loads, insufficiency of pseudo-static analyses, and the necessity for dynamic analyses. In recent years, progressive attention to the concept of performance-based design alleviated the situation and seismic displacement of retaining walls has got a critical role in the designing process of these structures. Furthermore, to economize the process of seismic design and reduce uncertainties coupled with pseudo-static methods, establishing a relationship between these methods and performance-based approaches provides a valuable tool for designers of geotechnical structures. In the present paper, by focusing on gravity walls and establishing applicable curves, relationships between the pseudo-static factor of safety, seismic coefficient, and seismic displacement have been investigated. In order to achieve this goal, the upper bound of limit analysis and integral of Newmark have been used. The height of the soil in the front of wall has been introduced as a design parameter. Fourteen selected Iran’s earthquake records have been implemented in the process of analyses. The proposed curves can be used to determine the required embedment of a wall in the front soil and also for estimating the corresponding seismic displacement for specific values of the seismic coefficient and factor of safety. Using the charts presented in this paper, it can be inferred that for a particular factor of safety (FS), greater values of seismic coefficient (kh) provide smaller seismic displacements, and also, in greater values of kh, the difference between values of seismic displacement of various FS will get close. Furthermore, for a certain kh, increasing FS generates decreasing seismic displacements.
Seismic Performance of Gravity Retaining Walls Considering the Passive Soil at the Front Side
https://orcid.org/http://orcid.org/0000-0002-9071-5418
There are many reasons to make behavior and performance of retaining walls during earthquakes difficult to evaluate, for example complex response of soil under dynamic loads, insufficiency of pseudo-static analyses, and the necessity for dynamic analyses. In recent years, progressive attention to the concept of performance-based design alleviated the situation and seismic displacement of retaining walls has got a critical role in the designing process of these structures. Furthermore, to economize the process of seismic design and reduce uncertainties coupled with pseudo-static methods, establishing a relationship between these methods and performance-based approaches provides a valuable tool for designers of geotechnical structures. In the present paper, by focusing on gravity walls and establishing applicable curves, relationships between the pseudo-static factor of safety, seismic coefficient, and seismic displacement have been investigated. In order to achieve this goal, the upper bound of limit analysis and integral of Newmark have been used. The height of the soil in the front of wall has been introduced as a design parameter. Fourteen selected Iran’s earthquake records have been implemented in the process of analyses. The proposed curves can be used to determine the required embedment of a wall in the front soil and also for estimating the corresponding seismic displacement for specific values of the seismic coefficient and factor of safety. Using the charts presented in this paper, it can be inferred that for a particular factor of safety (FS), greater values of seismic coefficient (kh) provide smaller seismic displacements, and also, in greater values of kh, the difference between values of seismic displacement of various FS will get close. Furthermore, for a certain kh, increasing FS generates decreasing seismic displacements.
Seismic Performance of Gravity Retaining Walls Considering the Passive Soil at the Front Side
https://orcid.org/http://orcid.org/0000-0002-9071-5418
There are many reasons to make behavior and performance of retaining walls during earthquakes difficult to evaluate, for example complex response of soil under dynamic loads, insufficiency of pseudo-static analyses, and the necessity for dynamic analyses. In recent years, progressive attention to the concept of performance-based design alleviated the situation and seismic displacement of retaining walls has got a critical role in the designing process of these structures. Furthermore, to economize the process of seismic design and reduce uncertainties coupled with pseudo-static methods, establishing a relationship between these methods and performance-based approaches provides a valuable tool for designers of geotechnical structures. In the present paper, by focusing on gravity walls and establishing applicable curves, relationships between the pseudo-static factor of safety, seismic coefficient, and seismic displacement have been investigated. In order to achieve this goal, the upper bound of limit analysis and integral of Newmark have been used. The height of the soil in the front of wall has been introduced as a design parameter. Fourteen selected Iran’s earthquake records have been implemented in the process of analyses. The proposed curves can be used to determine the required embedment of a wall in the front soil and also for estimating the corresponding seismic displacement for specific values of the seismic coefficient and factor of safety. Using the charts presented in this paper, it can be inferred that for a particular factor of safety (FS), greater values of seismic coefficient (kh) provide smaller seismic displacements, and also, in greater values of kh, the difference between values of seismic displacement of various FS will get close. Furthermore, for a certain kh, increasing FS generates decreasing seismic displacements.
Seismic Performance of Gravity Retaining Walls Considering the Passive Soil at the Front Side
Indian Geotech J
Farzaneh, Orang (author) / Askari, Faradjollah (author) / Sharifi, Peiman (author)
Indian Geotechnical Journal ; 51 ; 329-346
2021-04-01
18 pages
Article (Journal)
Electronic Resource
English
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