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Rights & Permissions Free PDF Access Sign in to download PDF book and chapters Free Resources Display this book on your site! Related Titles NCHRP Synthesis 428: Practices and Procedures for Site-Specific Evaluations of Earthquake Ground Motions Preventing Earthquake Disasters: The Grand Challenge in Earthquake Engineering:A Research Agenda for the Network for Earthquake Engineering Simulation (NEES) Other Related Titles NCHRP Report 611: Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments (2009) National Cooperative Highway Research Program (NCHRP) Citation Manager Export the bibliographic data for this book in your chosen format Web Search Builder Use this book's key terms to search within this book, across our collection, or across the Web. Skim This Chapter Skim this chapter and use this chapter's key terms to search within this book. Reference Finder Paste in your own text to find books that relate to your topic. Citation Manager Lam, Ignatius Po, Martin, Geoffrey R, Anderson, Donald G, Wang, Joseph N, Transportation Research Board. "1.3.2 Volume 2 - Recommended Specifications, Commentaries, and Example Problems." NCHRP Report 611: Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments. Washington, DC: The National Academies Press, 2009. Please select a format: Page 9   E-mail Share on facebook Facebook Share on delicious Delicious Share on stumbleupon Stumble Share on twitter Twitter More Sharing ServicesMore Page 9 Front Matter (R1-R10) 1.1 Overall Project Objectives, Approach, and Schedule (1-1) 1.2.1 Plans for Implementing the LRFD Design Methodology (2-3) 1.2.2 Overview of Conclusions from Initial Phase of Work (4-4) 1.2.3 Overview of Conclusions from Second Phase of Work (5-6) 1.2.4 Overview of Conclusions from Third Phase of Work (7-7) 1.3.1 Volume 1 - Final Project Report (8-8) 1.3.2 Volume 2 - Recommended Specifications, Commentaries, and Example Problems (9-9) 2.1 Earthquake Design Basis (10-10) 2.2 Literature Search (11-11) 2.2.1 Key References (12-13) 2.2.2 General Observations (14-14) 2.3 DOT, Vendor, and Consultant Contacts (15-16) 2.4 Conclusions (17-17) 3.1.1 Gravity and Semi-Gravity Walls (18-20) 3.1.2 MSE Retaining Walls (21-21) 3.2.1 Seismic Considerations for Soil Slopes (22-22) 3.2.2 Seismic Considerations for Rock Slopes (23-23) 3.3 Buried Structures (24-24) 3.4 Conclusions (25-25) 4.1 Developments for Seismic Ground Motions (26-27) 4.2.1 Generalized Limit Equilibrium Analyses (28-28) 4.2.2 Wall Height-Dependent Seismic Coefficient (29-29) 4.3 Developments for Slopes and Embankments (30-30) 4.4.1 Analysis Procedures for TGD (31-32) 4.5 Summary (33-34) 5.1.1 Update to AASHTO Seismic Ground Motion Criteria (35-37) 5.1.2 Range of Ground Shaking Levels in the United States for Referenced Soft Rock (38-38) 5.1.3 Variation in Spectral Shapes for Soil and Rock Sites in WUS versus CEUS (39-40) 5.2.2 Description of Ground Motion Database (41-41) 5.2.4 Microsoft Access Database (42-42) 5.2.7 Newmark Sliding Block Displacement Correlations (43-45) 5.2.8 Comparison Between Correlations (46-47) 5.2.9 Confidence Level (48-48) 5.3 Correlation of PGV with S1 (49-53) 5.4 Conclusions (54-54) 6.1.1 Scattering Analyses for a Slope (55-62) 6.1.2 Scattering Analyses for Retaining Walls (63-65) 6.2 Conclusions (66-67) 7.1 Current Design Practice (68-70) 7.2.1 Seismic Active Earth Pressures (71-72) 7.2.2 Seismic Passive Earth Pressures (73-73) 7.3.2 Results of M-O Analyses for Soils with Cohesion (74-74) 7.3.3 Implication to Design (75-75) 7.5 Height-Dependent Seismic Design Coefficients (76-76) 7.5.1 Evaluation of Impedance Contrasts and Soil Behavior (77-78) 7.5.2 Results of Impedance Contrast and Nonlinearity Evaluations (79-80) 7.6 Displacement-Based Design for Gravity, Semi Gravity, and MSE Walls (81-81) 7.7 Conventional Gravity and Semi-Gravity Walls - Recommended Design Method for External Stability (82-83) 7.8.2 MSE Walls - Design Method for External Stability (84-86) 7.8.3 MSE Walls - Design Method for Internal Stability (87-87) 7.9.1 Nongravity Cantilever Walls (88-90) 7.9.2 Anchored Walls (91-92) 7.9.3 Soil Nail Walls (93-93) 7.10 Conclusions (94-95) 8.1.1 Engineered Slopes and Embankments (96-96) 8.2.1 Limit Equilibrium Approach (97-98) 8.2.2 Displacement-Based Approach (99-99) 8.3 Proposed Design Methodology (100-100) 8.4.1 Problem Description (101-101) 8.5.1 Limit Equilibrium Design Methods (102-102) 8.5.3 Liquefaction Potential (103-103) 8.6 Conclusions (104-104) 9.2 Culvert/Pipe Characteristics (105-105) 9.3 General Effects of Earthquakes and Potential Failure Modes (106-106) 9.3.1 Ground Shaking (107-107) 9.4 Current Seismic Design Practice for Culverts or Other Buried Structures (108-108) 9.5.1 Ovaling of Circular Conduits (109-112) 9.5.2 Racking of Rectangular Conduits (113-114) 9.6.2 Model Assumptions and Results (115-128) 9.7 Conclusions and Recommendations (129-130) 10.2 Retaining Walls (131-131) 10.3 Slopes and Embankments (132-132) 10.5 Need for Confirming Methods (133-133) References (134-136) Appendices (137-137) Abbreviations used without definitions in TRB publications (138-138)

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9 and are believed to warrant further study. These topics in the specifications and commentaries and used in the ex- range from identification of methods for quantifying the ample problems were developed as the specifications, com- amount of cohesion that can be counted on during design mentaries, and example problems were being completed. to methods for describing the liquefaction strength of soils This work occurred after the completion of work described in located beneath embankments. Volume 1. · Chapter 11--References lists the references used during the Project. · Specifications and Commentaries summarize the recom- mended specifications and commentaries after revisions to This report also includes a number of appendices with sup- address (1) the NCHRP Oversight Panel's comments on porting documentation for the work presented in Chapters 2 drafts of the specifications and commentaries and (2) mod- through 9. ifications made by the Project Team after completing ex- ample problems. Some topics such as slope stability did not currently have an independent section or subsection within 1.3.2 Volume 2--Recommended the AASHTO LRFD Bridge Design Specifications, but rather Specifications, Commentaries, were scattered within the various sections. The approach and Example Problems for including the work developed during the NCHRP 12-70 This volume includes recommended specifications, com- Project became, therefore, more of a challenge. mentaries, and example problems as summarized below. The · Example Problems show the steps necessary to complete a background for some, but not all, of the methods described seismic design following the methods proposed for this in Volume 2 is included in Volume 1. Some methods outlined Project.