{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/69960"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/69960","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Development of Mechanistic Flexible Pavement Design Concepts for the Heavyweight F-15 Aircraft (Airfield, Computer Design, Cbr, Algorithms)","abstract":"A new configuration of the F-15 aircraft has been developed and is in use by the U.S. Air Force. This heavyweight F-15 has a 30-kip/355-psi wheel loading. A heavier-weight F-15 with 36-kip/395-psi wheel loading has been proposed for use. The F-15 will become the controlling aircraft for design of airfield Light-Load Pavements. A review is presented of the concepts and development of the present Department of Defense (DOD) method for flexible airfield pavement design.","abstract_html":"A new configuration of the F-15 aircraft has been developed and is in use by the U.S. Air Force. This heavyweight F-15 has a 30-kip/355-psi wheel loading. A heavier-weight F-15 with 36-kip/395-psi wheel loading has been proposed for use. The F-15 will become the controlling aircraft for design of airfield Light-Load Pavements. A review is presented of the concepts and development of the present Department of Defense (DOD) method for flexible airfield pavement design.","abstract_has_math":false,"creators":["Kelly, Henry Francis, Iv"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-15T20:36:24Z","date_published":"2014-12-15T20:36:24Z","updated_at":"2026-07-22T22:26:01Z","subjects":["Engineering, Civil"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8623340"],"render_values":[{"text":"(UMI)AAI8623340","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/69960","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Kelly, Henry Francis, Iv"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-15T20:36:24Z","10000-01-01","1986"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Civil"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/69960","(UMI)AAI8623340"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["A new configuration of the F-15 aircraft has been developed and is in use by the U.S. Air Force. This heavyweight F-15 has a 30-kip/355-psi wheel loading. A heavier-weight F-15 with 36-kip/395-psi wheel loading has been proposed for use. The F-15 will become the controlling aircraft for design of airfield Light-Load Pavements. A review is presented of the concepts and development of the present Department of Defense (DOD) method for flexible airfield pavement design.","The structural model used in this study to calculate pavement structural responses (stresses, strains, deflections) is the finite element program ILLI-PAVE. This program considers the pavement as an axisymmetric solid, and accommodates stress-dependent materials and soils and stress corrections according to Mohr-Coulomb failure criteria. Multiple regression analyses are performed on an extensive ILLI-PAVE data base (400 runs) to develop prediction equations (algorithms) for pavement structural responses of interest. These equations have high statistical precision when compared against the ILLI-PAVE data base. Therefore, they may be used in lieu of running ILLI-PAVE, which generally requires a main-frame computer. Equations developed from a much smaller data base, consisting of three levels of each of the variables (i.e., 3('4) factorial = 81 runs), were found to provide acceptable accuracy. Using 3('4) factorial data bases, algorithms are developed for the heavyweight F-15 load, heavier-weight F-15 load (36-kip/395-psi), 24-kip/355-psi load, and 36-kip/355-psi load.","Pavement test section data obtained from the literature are analyzed using ILLI-PAVE. Transfer functions are derived relating calculated pavement responses to coverage till failure.","The components of a mechanistic design procedure are discussed. A mechanistic design example is presented and compared to the DOD design for the same conditions. Critical pavement responses recommended for design are maximum radial tensile strain at the bottom of the asphalt concrete and maximum subgrade stress ratio (deviator stress/compressive strength). It was found that four inches of asphalt concrete may not be sufficient to prevent premature fatigue cracking of pavement subjected to long term use by the heavyweight F-15 aircraft. Also, the DOD designers for the heavyweight F-15 aircraft may be overly conservative for subgrade rutting.","Made available in DSpace on 2014-12-15T20:36:24Z (GMT). No. of bitstreams: 1 8623340.pdf: 7146979 bytes, checksum: b4c459ec8d5fc155b751b87d7387885c (MD5) Previous issue date: 1986","Embargo set by: Seth Robbins for item 70126 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","231 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1986."]},{"key":"dc:title","label":"Title","values":["Development of Mechanistic Flexible Pavement Design Concepts for the Heavyweight F-15 Aircraft (Airfield, Computer Design, Cbr, Algorithms)"]}]}],"canonical_facts":{"dc:creator":["Kelly, Henry Francis, Iv"],"dc:date":["2014-12-15T20:36:24Z","10000-01-01","1986"],"dc:description":["A new configuration of the F-15 aircraft has been developed and is in use by the U.S. Air Force. This heavyweight F-15 has a 30-kip/355-psi wheel loading. A heavier-weight F-15 with 36-kip/395-psi wheel loading has been proposed for use. The F-15 will become the controlling aircraft for design of airfield Light-Load Pavements. A review is presented of the concepts and development of the present Department of Defense (DOD) method for flexible airfield pavement design.","The structural model used in this study to calculate pavement structural responses (stresses, strains, deflections) is the finite element program ILLI-PAVE. This program considers the pavement as an axisymmetric solid, and accommodates stress-dependent materials and soils and stress corrections according to Mohr-Coulomb failure criteria. Multiple regression analyses are performed on an extensive ILLI-PAVE data base (400 runs) to develop prediction equations (algorithms) for pavement structural responses of interest. These equations have high statistical precision when compared against the ILLI-PAVE data base. Therefore, they may be used in lieu of running ILLI-PAVE, which generally requires a main-frame computer. Equations developed from a much smaller data base, consisting of three levels of each of the variables (i.e., 3('4) factorial = 81 runs), were found to provide acceptable accuracy. Using 3('4) factorial data bases, algorithms are developed for the heavyweight F-15 load, heavier-weight F-15 load (36-kip/395-psi), 24-kip/355-psi load, and 36-kip/355-psi load.","Pavement test section data obtained from the literature are analyzed using ILLI-PAVE. Transfer functions are derived relating calculated pavement responses to coverage till failure.","The components of a mechanistic design procedure are discussed. A mechanistic design example is presented and compared to the DOD design for the same conditions. Critical pavement responses recommended for design are maximum radial tensile strain at the bottom of the asphalt concrete and maximum subgrade stress ratio (deviator stress/compressive strength). It was found that four inches of asphalt concrete may not be sufficient to prevent premature fatigue cracking of pavement subjected to long term use by the heavyweight F-15 aircraft. Also, the DOD designers for the heavyweight F-15 aircraft may be overly conservative for subgrade rutting.","Made available in DSpace on 2014-12-15T20:36:24Z (GMT). No. of bitstreams: 1 8623340.pdf: 7146979 bytes, checksum: b4c459ec8d5fc155b751b87d7387885c (MD5) Previous issue date: 1986","Embargo set by: Seth Robbins for item 70126 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","231 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1986."],"dc:identifier":["http://hdl.handle.net/2142/69960","(UMI)AAI8623340"],"dc:subject":["Engineering, Civil"],"dc:title":["Development of Mechanistic Flexible Pavement Design Concepts for the Heavyweight F-15 Aircraft (Airfield, Computer Design, Cbr, Algorithms)"],"dc:type":["text"],"thesis:degree_discipline":["Civil Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:01Z"}