NCHRP Report 611: Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments
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  • 148 pages
  • Downloads: 199
NCHRP Report 611:
Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments
(2009)
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Overview

Authors

Description

TRB's National Cooperative Highway Research Program (NCHRP) Report 611: Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments 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.

The appendices to NCHRP Report 611 are available online and include the following:

A. Working Plan

B. Design Marginâ€"Seismic Loading of Retaining Walls

C. Response Spectra Developed from the USGS Website

D. PGV Equationâ€"Background Paper

E. Earthquake Records Used in Scattering Analyses

F. Generalized Limit Equilibrium Design Method

G. Nonlinear Wall Backfill Response Analyses

H. Segrestin and Bastick Paper

I. MSE Wall Example for AASHTO ASD and LRFD Specifications

J. Slope Stability Example Problem

K. Nongravity Cantilever Walls

View information about the TRB Webinar on Report 611: Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments: Wednesday, February 17, 2010

Topics

  • Transportation — Construction
  • Transportation — Design
  • Transportation — Bridges and Other Structures
  • Transportation — Geotechnology
Contents

Table of Contents

skim chapter
Front Matter i-x
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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