00624902

Component

http://onlinepubs.trb.org...trr/1992/1336/1336-012.pdf

https://scholar.google.co...WANG&publication_year=1992

A method of bearing capacity determination for strip surface footings subjected to vertical central loading and underlain by a continuous circular void with its axis parallel with the footing axis is presented. A nomograph is also presented for ease in application of the developed equations. For equation development, the performance of strip surface footings with and without an underground void was investigated using a plane-strain finite element computer program. In the analysis, the foundation soil was characterized as a nonlinear elastic, perfectly plastic material that obeys the Drucker-Prager yield criterion. A wide range of soil properties, footing widths, void sizes, and void locations including depth to void and void eccentricity was considered. The ultimate bearing capacity values were obtained from the results of analysis and were related graphically with the influencing factors investigated. The bearing capacity equations were then developed through curve fitting to these graphical relationships. The effectiveness of the developed equations was evaluated by comparing the computed bearing capacity values with the model footing test results. Good agreement between the two sets of data was shown. It was therefore concluded that the developed equations together with the nomograph may become an effective tool for analysis and design of strip surface footing underlain by a continuous circular void, at least within the conditions investigated.

This paper appears in Transportation Research Record No. 1336, Foundation Engineering: Seismic Design, Drilled Shafts, and Other Issues. 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

01404959

English

p. 90-95

1992

Transportation Research Record

0309051746

Figures (7) ; References (18) ; Tables (2)

Alternatives analysis; Bearing capacity; Computer programs; Equations; Finite element method; Foundation soils; Loads; Nomographs; Strip footings; Void ratios

Model tests; Vertical loads; Voids

Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB

Sep 9 1993 12:00AM

• COMPARISON OF MEASURED AND COMPUTED DRILLED SHAFT CAPACITIES BASED ON UTAH LOAD TESTS
• DYNAMIC CENTRIFUGE MODELING OF GEOTECHNICAL STRUCTURES
• DYNAMIC CENTRIFUGE MODELING OF SOUND WALLS SUPPORTED ON CONCRETE CANTILEVER AND MECHANICALLY STABILIZED EARTH RETAINING STRUCTURES
• DYNAMIC TESTING OF DRILLED SHAFTS
• EFFECTS OF STRATIGRAPHIC AND CONSTRUCTION DETAILS ON THE LOAD TRANSFER BEHAVIOR OF DRILLED SHAFTS
• LATERAL SUBGRADE MODULUS OF SANDS FOR DEEP FOUNDATIONS
• MODELING SOIL REACTION TO LATERALLY LOADED PILES
• NUMERICAL SIMULATION OF REINFORCED SOIL STRUCTURES DURING BLAST LOADS
• OVERVIEW OF EVALUATION OF PILE FOUNDATION STIFFNESSES FOR SEISMIC ANALYSIS OF HIGHWAY BRIDGES
• RESPONSE OF TENSION PILES TO SIMULATED SEISMIC MOTION IN SATURATED FINE SAND
• SEISMIC HIGHWAY BRIDGE DESIGN USING SPECTRA SPECIFIC TO WASHINGTON STATE
• VERTICAL UPLIFT LOAD-DISPLACEMENT RELATIONSHIP OF HORIZONTAL ANCHORS IN SAND