00490139

Component

http://onlinepubs.trb.org...trr/1988/1191/1191-017.pdf

https://scholar.google.co...lian&publication_year=1988

The results of a study on the seismic response of permanent tieback walls prepared for the Washington State Department of Transportation (WSDOT) are presented in this paper. The use of permanent walls in highway construction has expanded greatly during the past decade. The WSDOT has been a pioneer in permanent tieback wall construction, especially along Interstates I-50 and I-90 in western Washington. Because of the high seismicity of this area, it is necessary to evaluate the vulnerability of these walls to earthquake loading. It is current WSDOT design practice to assume that the static design of a tieback wall retaining clayey soils provides an adequate reserve of strength to prevent failure during seismic loading. This is based on the assumption that the soil and the wall move together and significant dynamic loads are not produced. For tieback walls retaining sandy soils, Mononobe-Okabe dynamic soil pressures are added to the static design pressure. The validity of these design practices is evaluated in this paper. The results of a literature review clearly show that very little work has been done on the seismic response of tieback walls and no analysis or design procedures have been proposed. A pilot numerical study was undertaken for this research project. A 40-ft-high wall with three levels of tiebacks was analyzed using the program FLUSH. For this particular example problem it was found that the wall and the soil tend to move in-phase and that only negligible dynamic tie forces are generated. However, the soil above and below the excavation level tends to move out-of-phase, leading to significant dynamic earth pressures on, and bending moments in, the wall near the excavation level. Also, high vertical accelerations are predicted, even though only horizontal accelerations are used as input. The vertical accelerations appear to be caused by rocking of the soil-wall system and lead to high bearing pressures below the wall.

This paper appears in Transportation Research Record No. 1191, Culverts and Tiebacks. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01414023

p. 166-175

1988

Transportation Research Record

0309048028

Figures (12) ; References (19) ; Tables (1)

Clay soils; Computer programs; Earthquakes; Finite element method; Numerical analysis; Retaining walls; Sandy soils; Seismicity; Soil structure interaction; Tiebacks

Seismic response

Bridges and other structures; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls

TRIS, TRB, ATRI

Dec 31 1989 12:00AM

• ALLOWABLE FILL HEIGHTS FOR CORRUGATED POLYETHYLENE PIPE
• AN ANALYSIS OF VISUAL FIELD INSPECTION DATA OF 900 PIPE-ARCH STRUCTURES
• ANALYSIS OF TIEBACK SLOPES AND WALLS USING STABL5 AND PCSTABL5
• CULVERT DURABILITY RATING SYSTEMS
• CURRENT PRACTICE OF REINFORCED CONCRETE BOX CULVERT DESIGN
• DESIGN OF THIN WALL REINFORCED CONCRETE SEMICIRCULAR ARCH USING DIMENSION RATIO
• ELASTIC BUCKLING STRENGTH OF BURIED FLEXIBLE CULVERTS
• FAILURE OF FLEXIBLE LONG-SPAN CULVERTS UNDER EXCEPTIONAL LIVE LOADS
• FIELD PERFORMANCE OF CORRUGATED METAL BOX CULVERTS
• INVESTIGATION OF THE STRUCTURAL ADEQUACY OF C 850 BOX CULVERTS
• LATERALLY LOADED CAST-IN-DRILLED-HOLE PILES
• LEAST COST (LIFE CYCLE) ANALYSIS MICROCOMPUTER PROGRAM (WITH DISCUSSION AND CLOSURE)
• LIFE CYCLE COST ANALYSIS: KEY ASSUMPTIONS AND SENSITIVITY OF RESULTS
• LIFE-CYCLE COST FOR DESIGN OF ARMY DRAINAGE STRUCTURES (WITH DISCUSSION AND CLOSURE)
• LOAD TEST REPORT AND EVALUATION OF A PRECAST CONCRETE ARCH CULVERT
• OPTIMUM GEOMETRIC SHAPES OF PRECAST CONCRETE ARCH STRUCTURES OF 24-, 30-, AND 40-FT SPANS (WITH DISCUSSION AND CLOSURE)
• PIPECAR AND BOXCAR MICROCOMPUTER PROGRAMS FOR THE DESIGN OF REINFORCED CONCRETE PIPE AND BOX SECTIONS
• SERVICE LIFE MODEL VERIFICATION FOR CONCRETE PIPE CULVERTS IN OHIO (WITH DISCUSSION AND CLOSURE)
• SOME OBSERVATIONS ON FLEXIBLE PIPE RESPONSE TO LOAD