Effect of Floor Rigidity on Contact Stress and Differential Settlement

This paper presents the effect of soil, foundation, and superstructure interaction on the contact stress and differential settlement. In recent design, designers have tried to resist the differential settlement by tie beams that connect the foundations. It is a complicated problem to calculate the differential settlement under the foundations taking into consideration the effect of the soil structure interaction. In addition, design of the tie beams that can resist the differential settlement by rigidity only result in a huge beam section with a huge reinforcement. Usually the tie beams are constructed as flexible rigidity due to the thickness-length ratio. Therefore, the tie beams cannot resist the differential settlement alone, and the superstructure members also shall work together with the tie beams. This paper presents the effect of the superstructure floor only without tie beams on the contact stress and differential settlement. Floor rigidity has a significant effect on the contact stress that increases the outer footing contact stress and decreases the contact stress under inner footing. This interaction leads to dampen the differential settlement under foundations. The floor rigidity affects the differential settlement, and the differential settlement affects the straining actions acting on the floor. In addition, the straining actions affect the design of the floor sections that affect the floor rigidity. This closed form solution still is in need of more research to simplify the solution. Currently it can be solved using geotechnical finite element (FE) programs that can simulate the superstructure members. Therefore, calculation of the secondary stresses on the floors concerning differential settlement calculated without soil structure interaction is wrong.

• Record URL:
  https://doi.org/10.1061/9780784478530.012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784478530
• Supplemental Notes:
  • © 2014 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Farouk, Hany
  • Farouk, Mohammed
• Conference:
  • Geo-Hubei 2014 International Conference on Sustainable Civil Infrastructure
  • Location: Yichang Hubei, China
  • Date: 2014-7-20 to 2014-7-22
• Publication Date: 2014-6

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 94-101
• Monograph Title: Recent Advances in Material, Analysis, Monitoring, and Evaluation in Foundation and Bridge Engineering

Subject/Index Terms

• TRT Terms: Bridge decks; Bridge foundations; Bridge superstructures; Design; Differential settlement; Finite element method; Footings; Geotechnical engineering; Soil structure interaction; Stiffness
• Uncontrolled Terms: Contact stress; Tie beams
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls; I42: Soil Mechanics;

Filing Info

• Accession Number: 01536425
• Record Type: Publication
• ISBN: 9780784478530
• Files: TRIS, ASCE
• Created Date: Sep 1 2014 3:09PM