DYNAMIC RESPONSE OF FOOTINGS TO VERTICAL LOADING

A METHOD IS DEVELOPED FOR ANALYSIS OF THE VERTICAL MODE OF VIBRATION OF A RIGID CIRCULAR FOOTING RESTING ON THE SURFACE OF AN ELASTIC HALF-SPACE. THIS SOLUTION INCLUDES ALL RANGES OF FREQUENCIES FOR STEADY STATE VIBRATION AND IT IS SHOWN HOW THE TRANSIENT RESPONSE CAUSED BY A PULE-TYPE LOADING CAN BE CALCULATED FROM THE STEADY STATE SOLUTION BY A SIMPLE FOURIER TECHNIQUE. FROM THIS DEVELOPMENT, IT IS SHOWN THAT THE ELASTIC HALF-SPACE MODEL BEHAVES SIMILARLY TO A SIMPLY DAMPED OSCILLATOR AND A SIMPLIFIED ANALOG OF THE MASS-SPRING DASHPOT TYPE IS PROPOSED FOR PRACTICAL CALCULATIONS. THE THEORETICAL RESULTS ARE SUPPORTED BY COMPARISONS WITH BOTH STEADY STATE AND IMPACT TEST RESULTS REPORTED IN THE LITERATURE. /RRL/A/

• Supplemental Notes:
  • Proc, Vol 92, NO SM1, PP 65-91, 17 FIG, 10 REF
• Authors:
  • LYSMER, J
  • Richart, F E
• Publication Date: 1966-1

Media Info

• Serial:
  • Journal of Soil Mechanics & Foundations Div

Subject/Index Terms

• TRT Terms: Analysis; Crash tests; Dynamic loads; Electromagnetic frequencies; Footings; Foundations; Fourier analysis; Half spaces; Loads; Methodology; Signal generators; Steady state; Stiffness; Transient analyzers; Vibration
• Uncontrolled Terms: Dynamic response; Loading; Rigid foundations; Transient response; Vertical loads
• Old TRIS Terms: Oscillators
• Subject Areas: Bridges and other structures; Highways; Research;

Filing Info

• Accession Number: 00208150
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: May 1 1994 12:00AM