COMPUTER SOLUTION FOR SETTLEMENT OF FOUNDATIONS

MODERN COMPLEX STRUCTURES WITH HEAVY LOADINGS REQUIRE A DETAILED ANALYSIS OF THE DIFFERENTIAL SETTLEMENTS TO BE EXPECTED BECAUSE OF SOIL CONSOLIDATION. HOWEVER, THE ACCURATE CALCULATION OF SUCH SETTLEMENTS CONSIDERING VARIABLE SOIL PROPERTIES AND MANY LOADED POINTS IS A LABORIOUS AND TIME-CONSUMING JOB. IT WAS DECIDED TO DEVELOP A DIGITAL COMPUTER SOLUTION WHICH WOULD BE BASED ON THE ONE- DIMENSIONAL CONSOLIDATION THEORY AND THE ELASTIC THEORY OF STRESS DISTRIBUTION BUT WOULD STILL TAKE INTO ACCOUNT THE VARIATION IN SOIL PROPERTIES AND THE COMPLEXITY OF MANY LOADING CONDITIONS. THE MATHEMATICAL INTEGRATION OF THE EXPRESSION DEVELOPED TO PREDICT SETTLEMENT IS VERY DIFFICULT BECAUSE THE STRESS- STRAIN RELATION IN SOIL IS NONLINEAR, THERE IS NO GENERAL RELATION BETWEEN THE PRESSURE AT A POINT IN SOIL AND THE MANY LOADS THAT CAUSE THE PRESSURE, AND BOTH THE INITIAL AND FINAL PRESSURES ARE VARIABLES. TO OVERCOME THESE DIFFICULTIES, A NUMERICAL MODIFIED EULER METHOD WAS USED. A FLOW DIAGRAM AND A SPECIFIC FORTRAN LANGUAGE INSTRUCTION FOR THE IBM 1620 COMPUTER WERE PREPARED AND TYPICAL DIFFERENTIAL SETTLEMENT PROBLEMS WERE SOLVED. THE SETTLEMENTS OBTAINED COMPARED FAVORABLY WITH EXPERIMENTAL RESULTS. THE TIME INVOLVED TO EXECUTE A PROGRAM DEPENDS ON THE COMPUTER SPEED, THE NUMBER OF LOADS, THICKNESS OF SOIL LAYER AND THE INCREMENT OF THICKNESS SELECTED. THE COMPUTER SOLUTION COMPARES FAVORABLY IN COST, ACCURACY AND SPEED WITH OTHER CALCULATION METHODS. THE GREATER THE COMPLEXITY OF THE STRUCTURE, THE BETTER IS THE COMPARISON. /AUTHOR/

Language

  • English

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: pp 55-67
  • Monograph Title: Soil stresses; Foundation settlement; Caisson Stability
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00230519
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:40AM