Seismic Analysis of Retaining Walls, Buried Structures, Embankments, and Integral Abutments

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ISBN 13 :
Total Pages : 164 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Seismic Analysis of Retaining Walls, Buried Structures, Embankments, and Integral Abutments by :

Download or read book Seismic Analysis of Retaining Walls, Buried Structures, Embankments, and Integral Abutments written by and published by . This book was released on 2005 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments

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Publisher : Transportation Research Board
ISBN 13 : 0309117658
Total Pages : 148 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments by : Donald G. Anderson

Download or read book Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments written by Donald G. Anderson and published by Transportation Research Board. This book was released on 2008 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report explores analytical and design methods for the seismic design of retaining walls, buried structures, slopes, and embankments. The Final Report is organized into two volumes. NCHRP Report 611 is Volume 1 of this study. Volume 2, which is only available online, presents the proposed specifications, commentaries, and example problems for the retaining walls, slopes and embankments, and buried structures.

NCHRP Report 611

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Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis NCHRP Report 611 by :

Download or read book NCHRP Report 611 written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Analysis and Design of Retaining Structures Against Earthquakes

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ISBN 13 :
Total Pages : 148 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Analysis and Design of Retaining Structures Against Earthquakes by : Shamsher Prakash

Download or read book Analysis and Design of Retaining Structures Against Earthquakes written by Shamsher Prakash and published by . This book was released on 1996 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: GSP 60 contains eight papers on retaining structures to withstand earthquakes presented at sessions of the ASCE National Convention, held in Washington, D.C., November 10-14, 1996.

Soil-Structure Interaction, Underground Structures and Retaining Walls

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Publisher : IOS Press
ISBN 13 : 1614994641
Total Pages : 404 pages
Book Rating : 4.6/5 (149 download)

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Book Synopsis Soil-Structure Interaction, Underground Structures and Retaining Walls by : V.M. Ulitsky

Download or read book Soil-Structure Interaction, Underground Structures and Retaining Walls written by V.M. Ulitsky and published by IOS Press. This book was released on 2015-02-24 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: With construction techniques becoming ever more complex, and population pressure leading to the development of increasingly problematic sites, expertise in the area of soil structure interaction is crucial to architectural and construction industries worldwide. This book contains the proceedings of the ISSMGE Technical Committee 207 International Conference on Geotechnical Engineering - Soil Structure Interaction and Retaining Walls - held in St Petersburg, Russia, in June 2014. The conference was dedicated to the memory of the outstanding geotechnical expert Gregory Porphyryevich Tschebotarioff. Topics covered at the conference included: soil structure interaction, underground structures and retaining walls, site investigation as a source of input parameters for soil structure interaction, and interaction between structures and frozen soils. The papers included here are the English language papers. Papers presented by the authors in Russian are published by the Georeconstruction Institute of St. Petersburg.

Retaining Structures

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Publisher : Thomas Telford
ISBN 13 : 9780727719324
Total Pages : 854 pages
Book Rating : 4.7/5 (193 download)

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Book Synopsis Retaining Structures by : C. R. I. Clayton

Download or read book Retaining Structures written by C. R. I. Clayton and published by Thomas Telford. This book was released on 1993 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt: For practising civil and structural engineers in the field of general earth-retaining structure theory, this work presents the results of many case studies of actual retaining wall analysis, design, and construction. It also includes fundamental papers dealing with the effects of groundwater on passive earth pressure, and other related topics.

Lumped Macroelement Modeling of Earth-Retaining Structures Under Seismic Loading for Nonlinear Time-History Analyses

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ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (19 download)

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Book Synopsis Lumped Macroelement Modeling of Earth-Retaining Structures Under Seismic Loading for Nonlinear Time-History Analyses by : Arastoo Dasmeh

Download or read book Lumped Macroelement Modeling of Earth-Retaining Structures Under Seismic Loading for Nonlinear Time-History Analyses written by Arastoo Dasmeh and published by . This book was released on 2019 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation addresses various engineering problems involving the seismic re- sponse modeling of earth-retaining structures. These are namely, (i) lateral pas- sive seismic behavior of ordinary skew-angled bridge abutments, (ii) lateral pas- sive seismic behavior of high-speed rail transition abutments (with no skew), and finally (iii) active and passive seismic behavior of (cantilevered) earth-retaining walls. The approach adopted for each problems is the same, which is to devise a macroelement model with physics-based parameters (e.g., soil density, shear strength, wall height, etc.) that captures salient response features. These models are able to predict the lateral capacity of the retained soil and residual displace- ments with a modest computational effort--as compared to, for example, predic- tive simulations carried out with three-dimensional finite element models--, which renders them to be amenable for repeated nonlinear time-history analyses required for performance-based seismic assessment and design. The three aforementioned problems are briefly described below: I. Presence of skew-angled abutments complicates the seismic behavior of or- dinary bridges, primary driver of which is the passive lateral resistance of the engineered backfill behind the abutment. The eccentricity of the soil reaction ii relative to the bridge's center of stiffness or mass causes a skew bridge to rotate under seismic excitations, and a nonuniform soil pressure distribution develops behind the abutment backwall. A distributed nonlinear spring model is devised here to represent the lateral passive reaction of the backfill soil. To that end, a modification factor is devised so that Log-Spiral Hyperbolic (LSH) backbone curves -which had been developed in prior research and were validated for back- fills of straight abutment-can be used to generate the backbone curves of the said springs. This new modeling approach is verified against three-dimensional finite element model simulations and is validated with data from large-scale experiments conducted at Brigham Young University that had produced direct measurements of load-deformation backbone curves for several skew angles. In the final step, the validated modified-LSH model is used in parametric studies to devise a simple bilinear load-deformation relationship that is parameterized with respect to the backwall height, abutment skew angle, and the backfill soil properties. This sim- ple relationship is intended for routine use in the capacity-based seismic design and analysis of skew bridges. II. California's High-Speed Rail (HSR) System is slated to traverse nearly the entire length of the state, and thus it will be exposed seismic risks from almost every known major tectonic fault there. The present study deals with the seismic responses of bridge-abutment transition backfills (BATBs), which are essential components of HSR bridges. BATBs provide a gradual variation of vertical stiff- ness between the bridge deck and the engineered backfill zone, enabling smooth operations for trains traveling at high speeds. All prior investigations focused on this vertical stiffness in order to better characterize the localized vertical dif- ferential movements around BATBs under periodic high axial loads from train sets. Lateral behavior of BATBs, which are important under seismic loads, have not been previously investigated. The present study offers a parametric nonlin- ear lateral force-displacement backbone curve for BATBs that is verified against iii three-dimensional finite element models and validated against data from large- scale tests conducted at Brigham Young University. The parametric curve takes backwall height as well as abutment skew angle into account. III. Performance-based seismic assessment (PBSA) of earth retaining struc- tures requires the use of accurate yet computationally efficient analysis models. To date, limit equilibrium models offered the most computationally efficient re- sults, but they only produce estimates of peak lateral seismic forces and cannot be used in nonlinear time-history analyses. While detailed finite element models can possibly fill this need, they are not amenable for repeated simulations required for quantifying the uncertainties associated with estimated ground motions within the PBSA framework. A novel Lumped Impedance Model (LIM) is developed in this study that generates as accurate solutions as detailed FE models, with trivial computational effort. The model is able to also reproduce lateral passive load-deformation backbone curves as predicted by a state-of-the art limit equi- librium model, by its design. The computational saving offered by LIM is due to lumping of mass and stiffness of the retained soil, and the strategic placement of elastoplastic macroelements along pre-calculated active and passive failure hy- perplanes. LIM is verified against analytical solutions in frequency-domain for linear response regimes--wherein it is shown that LIM can accurately capture the frequency-dependent responses of the retained soil--as well as other previous studies for inelastic conditions. LIM is also verified against detailed FEM sim- ulations of cantilevered retaining wall subjected to both narrow- and broadband excitations, and it is shown that both elastic and inelastic responses of the retained soil (including residual wall displacements and rotations) are adequately captured. Finally, a framework for PBSA of earth-retaining structures using LIM as the pre- dictive model is proposed and its use is demonstrated through an example seismic assessment application wherein a fragility curve is computed. iv

Seismic Design of Embankments and Caverns

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ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Seismic Design of Embankments and Caverns by : Terry R. Howard

Download or read book Seismic Design of Embankments and Caverns written by Terry R. Howard and published by . This book was released on 1983 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Experimental and Numerical Modeling of Seismic Earth Pressures on Retaining Walls with Cohesive Backfills

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ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.:/5 (94 download)

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Book Synopsis Experimental and Numerical Modeling of Seismic Earth Pressures on Retaining Walls with Cohesive Backfills by : GABRIEL ALFONSO. CANDIA

Download or read book Experimental and Numerical Modeling of Seismic Earth Pressures on Retaining Walls with Cohesive Backfills written by GABRIEL ALFONSO. CANDIA and published by . This book was released on 2013 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observations from recent earthquakes show that all types of retaining structures with non-liquefiable backfills perform very well and there is limited evidence of damage or failures related to seismic earth pressures. Even retaining structures designed only for static loading have performed well during strong ground motions suggesting that special seismic design provisions may not be required in some cases. The objective of this study was to characterize the seismic interaction of backfill-wall systems using experimental and numerical models, with emphasis on cohesive soils, and to review the basic assumptions of current design methods. In the experimental phase of this research, two sets of centrifuge models were conducted at the Center for Geotechnical modeling in UC Davis. The first experiment consisted of a basement wall and a freestanding cantilever wall with level backfill, while the second one consists of a cantilever wall with sloping backfill. The soil used in the experiments was a compacted low plasticity clay. Numerical simulations were performed using FLAC2-D code, featuring non-linear constitutive relationships for the soil and interface elements. The non-linear hysteretic constitutive UBCHYST was used to model the level ground experiment and Mohr-Coulomb with hysteretic damping was used to model the sloping backfill experiment. The simulations captured the most important aspects of the seismic responses, including the ground motion propagation and the dynamic soil-structure interaction. Special attention was given to the treatment of boundary conditions and the selection of the model parameters. The results from the experimental and numerical analysis provide information to guide the designers in selecting seismic design loads on retaining structures with cohesive backfills. The experimental results show that the static and seismic earth pressures increase linearly with depth and that the resultant acts at 0.35H-0.4H, as opposed to 0.5-0.6H assumed in current engineering practice. In addition, the observed seismic loads are a function of the ground motion intensity, the wall type and backfill geometry. In general, the total seismic load can be expressed using Seed and Whitman's (1970) notation as: Pae=Pa+dPae, where Pa is the static load and dPae is the dynamic load increment. While the static load is a function of the backfill strength, previous stress history and compaction method, the dynamic load increment is a function of the free field PGA, the wall displacements, and is relatively independent of cohesion. In level ground, the dynamic load coefficient can be expressed as dKae=1/2gH2(0.68PGAff/g) for basement walls and dKae=1/2gH2(0.42PGAff/g) for cantilever walls; these results are consistent with similar experiments performed in cohesionless soils (Mikola & Sitar, 2013. In the sloping ground experiment the seismic coefficient came out to dKae=1/2gH2(0.7PGAff/g), which is consistent with Okabe's (1926) Coulomb wedge analysis of the problem. However, that slope was stable under gravity loads even without the presence of the retaining wall (FS=1.4). Measured slope displacements were very small and in reasonable good agreement with the predictions made with the Bray and Travasarou (2007) semi-empirical method. The experimental data was not sufficient to determine accurately the point of action of the seismic loads. However, the numerical simulations and Okabe's (1926) limit state theory suggest that the resultant acts between 0.37H-0.40H for typical values of cohesion. While the resultant acts at a point higher than 0.33H with increasing cohesion, the total seismic moment is reduced due to the significant reduction in the total load Pae, particularly for large ground accelerations. The results also show that typical retaining walls designed with a static factor of safety of 1.5 have enough strength capacity to resist ground accelerations up to 0.4g. This observation is consistent with the field performance of retaining walls as documented by Clough and Fragaszy (1977) and the experimental results by al Atik and Sitar (2010) and Geraili and Sitar (2013). The evaluation of earth pressures at the wall-backfill interface continues to be a technical challenge. Identified sources of error in the present study include the behavior of pressure sensors, the geometric and mass asymmetry of the model and the dynamic interaction between the model and the container. While these centrifuge experiments reproduced the basic response of prototype models, ultimately, instrumented full-scale structures are most essential to fully characterize the response of tall walls and deep basements with varieties of backfill.

Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions

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Publisher : CRC Press
ISBN 13 : 0429632010
Total Pages : 8083 pages
Book Rating : 4.4/5 (296 download)

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Book Synopsis Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions by : Francesco Silvestri

Download or read book Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions written by Francesco Silvestri and published by CRC Press. This book was released on 2019-07-19 with total page 8083 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions contains invited, keynote and theme lectures and regular papers presented at the 7th International Conference on Earthquake Geotechnical Engineering (Rome, Italy, 17-20 June 2019. The contributions deal with recent developments and advancements as well as case histories, field monitoring, experimental characterization, physical and analytical modelling, and applications related to the variety of environmental phenomena induced by earthquakes in soils and their effects on engineered systems interacting with them. The book is divided in the sections below: Invited papers Keynote papers Theme lectures Special Session on Large Scale Testing Special Session on Liquefact Projects Special Session on Lessons learned from recent earthquakes Special Session on the Central Italy earthquake Regular papers Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions provides a significant up-to-date collection of recent experiences and developments, and aims at engineers, geologists and seismologists, consultants, public and private contractors, local national and international authorities, and to all those involved in research and practice related to Earthquake Geotechnical Engineering.

Seismic Analysis of Cantilever Retaining Wall, Including Soil-Structure Interaction

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Seismic Analysis of Cantilever Retaining Wall, Including Soil-Structure Interaction by : T.D. Doshi

Download or read book Seismic Analysis of Cantilever Retaining Wall, Including Soil-Structure Interaction written by T.D. Doshi and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cantilever retaining walls are required to retain earth at a change in ground elevation. Cantilever retaining walls are made of reinforced concrete and consist of a thin stem and a base slab. During a seismic event, it is evident that earthquake response of each component of this complex system (i.e., wall, soil and structure) may affect substantially the response of the rest and vice versa. This earthquake response which is described as soil-structure interaction is generally ignored in the design process of cantilever retaining walls, though it has been shown that ignoring such effect may lead to unsafe seismic design. Flexibility of soil medium below foundation decreases the overall stiffness of the cantilever retaining wall structure, resulting in a subsequent increase in the displacement and reaction of the retaining wall structure. Hence in the present study, an attempt is made to observe the effects of soil-structure interaction on the change displacement and reaction of cantilever retaining wall considering different types of retaining wall system and variations of factors such as different earthquake zones (viz., 2, 3, 4, 5) and different support conditions (viz., fixed, fixed but, and foundation). The analysis of a retaining wall model has been modeled and analyzed using STAAD PRO software. The study shows that displacement and reaction increases with increase in the earthquake zones for different types of retaining walls with different support conditions. Therefore, the present study helps in understanding the effect of soil-structure interaction on cantilever retaining walls, which might help to improve the seismic behavior of cantilever retaining wall and also lead to a more economic design.

Seismic Response of Buried Pipes and Structural Components

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ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Seismic Response of Buried Pipes and Structural Components by : ASCE Committee on Seismic Analysis

Download or read book Seismic Response of Buried Pipes and Structural Components written by ASCE Committee on Seismic Analysis and published by . This book was released on 1983 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Seismic Analysis of Cantilever Retaining Walls, Phase I

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (518 download)

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Book Synopsis Seismic Analysis of Cantilever Retaining Walls, Phase I by : Russell A. Green

Download or read book Seismic Analysis of Cantilever Retaining Walls, Phase I written by Russell A. Green and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

General Seismic Analysis of Retaining Walls

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ISBN 13 :
Total Pages : 210 pages
Book Rating : 4.:/5 (435 download)

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Book Synopsis General Seismic Analysis of Retaining Walls by : Dunpeng Yao

Download or read book General Seismic Analysis of Retaining Walls written by Dunpeng Yao and published by . This book was released on 2000 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Seismic Analysis and an Improved Seismic Design Procedure for Gravity Retaining Walls

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ISBN 13 :
Total Pages : 424 pages
Book Rating : 4.:/5 (15 download)

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Book Synopsis Seismic Analysis and an Improved Seismic Design Procedure for Gravity Retaining Walls by : Chin Pang Wong

Download or read book Seismic Analysis and an Improved Seismic Design Procedure for Gravity Retaining Walls written by Chin Pang Wong and published by . This book was released on 1981 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Effect of Wall-Soil Interface Parameters on Seismic Response of Retaining Walls

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ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (113 download)

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Book Synopsis Effect of Wall-Soil Interface Parameters on Seismic Response of Retaining Walls by : Mohammadhashem Arabzadeh

Download or read book Effect of Wall-Soil Interface Parameters on Seismic Response of Retaining Walls written by Mohammadhashem Arabzadeh and published by . This book was released on 2018 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced soil retaining walls are important public structures. Typically there are two kinds of reinforced soil retaining walls: cantilever retaining walls and Geosynthetic reinforced soil retaining walls. While seismic performance of retaining walls is very important for public safety in the event of an earthquake, there are very limited studies on that. The main objectives of the present thesis are to (i) examine the behavior of the interface between structure and soil under various loading and boundary conditions for RC cantilever retaining walls; (ii) conduct sensitivity study on the seismic response of such walls considering the key parameters such as the cohesion (C), friction angle (z), shear stiffness (Ks), normal stiffness (Kn) and dilation (|); and (iii) study the size (height) effect of the relating walls on the seismic performance of such walls. In order to achieve the above objectives, a baseline model of an RC cantilever retaining wall has been constructed for static and dynamic analysis using the Finite Difference Method (FDM). The data for the baseline model are obtained from a published work on seismic response such a wall subjected to an earthquake in India (1991 Uttarkashi earthquake, 20th October), which used the Finite Element Method (FEM) for analysis. The validated baseline model is then used for an extensive parametric study on the static and dynamic behavior of the system which is not available in the literature. Based on the results of numerical modeling, in the static condition, wall deformation was decreased by increasing the cohesion (C), friction angle (z), shear stiffness (Ks), normal stiffness (Kn) and dilation (|) values. The dynamic behavior of the wall was quite different from the static behavior. With increasing the values of shear strength parameters (Cohesion and friction angle) and also shear stiffness (Ks), the wall displacements increased whereas with increasing normal stiffness (Kn) value, the wall deformation decreased. A sensitivity analysis of wall-soil interface parameters on seismic response of the retaining wall was carried out using the ground motion records from Canada earthquake motion database (6th March, Quebec, 2005) and the results were compared to the Uttarkashi earthquake in India. The results of this comparison showed that the response parameters in terms of the retaining wall deformation are similar for both earthquakes. Moreover, parametric studies on the behavior of the soil retaining walls under Montreal earthquake with three different heights (3 m, 6 m and 9 m), and two different types of soil (clay and sand) and eight input earthquakes motions were performed. Results show that the behavior of wall facing in terms of displacement in both horizontal and vertical direction is different, and the type of soil has a main role in the wall deformation. Finally, a statistical estimation of parameters between soil and retaining wall structure was done. According to this statistical study, cumulative percentage distribution of cohesion (C) and stiffness parameters (shear and normal) against wall deformation were calculated. Then, lower and upper boundary ranges of wall-soil parameters were established for both static and dynamic condition.

Seismic Analysis of Cantilever Retaining Walls

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ISBN 13 :
Total Pages : 1264 pages
Book Rating : 4.:/5 (534 download)

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Book Synopsis Seismic Analysis of Cantilever Retaining Walls by : Abdalla Mitwalli Mohamed Harraz

Download or read book Seismic Analysis of Cantilever Retaining Walls written by Abdalla Mitwalli Mohamed Harraz and published by . This book was released on 2003 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt: