EFFECTS OF SLAB SIZE ON CRITICAL RESPONSES IN AIRPORT CONCRETE PAVEMENTS

Critical response (the maximum transverse bending stress at the joint) is used as the damage indicator for pavement design in AC 150/5320-6D. The effect of slab size on the critical response can be directly obtained by calculating the critical response with varying slab sizes. Two pavement initial states plus two types of response are investigated to evaluate the effects of slab size on the maximum bending stress at pavement joints. The two initial states are: (1) the surface slabs keep full contact with the base or subbase; and (2) the surface slabs are warped up or curled down by a temperature gradient so that gaps exist between the surface slabs and the base or subbase layer. The two response types are: (1) responses induced by load only; and (2) total responses induced by the load and the temperature gradient both. Finite element analyses for cases with different slab widths under a single tire load show that slab width has an insignificant effect on load induced responses, regardless of the initial states (1) or (2), but it has very significant effect on the total stress induced by both load and temperature gradient. The most critical total stresses usually occur sometime in the afternoon and they are significantly higher than the total stresses which occur during the night. Since slab cracks are caused by the total stresses rather than the stresses induced by load only, the cracks would be expected to occur on larger slabs earlier than on smaller slabs.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784402868
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Guo, E H
  • Rice, J L
• Conference:
  • Aircraft/Pavement Technology In the Midst of Change
  • Location: Seattle, Washington
  • Date: 1997-8-17 to 1997-8-20
• Publication Date: 1997

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 320-334

Subject/Index Terms

• TRT Terms: Concrete pavements; Cracking; Critical values; Durability; Loads; Pavement design; Pavement joints; Slabs; Temperature gradients
• Uncontrolled Terms: Critical loads; Responses
• Subject Areas: Aviation; Design; Highways; Pavements; Terminals and Facilities; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00745910
• Record Type: Publication
• ISBN: 0784402868
• Files: TRIS, ATRI
• Created Date: Feb 27 1998 12:00AM