INCORPORATION OF RELIABILITY INTO NIGERIAN EMPIRICAL MECHANISTIC PAVEMENT ANALYSIS AND DESIGN SYSTEM (NEMPADS)

Simple item page
dc.contributor.authorMUSA, Muhammed Mustapha
dc.date.accessioned2016-05-12T11:16:10Z
dc.date.available2016-05-12T11:16:10Z
dc.date.issued2014-12
dc.descriptionA THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL AHMADU BELLO UNIVERSITY, ZARIA NIGERIA IN PARTIAL FULFILLMENT FOR THE AWARD OF MASTER OF SCIENCE (M.sc) DEGREE IN CIVIL ENGINEERING DEPARTMENT OF CIVIL ENGINEERING FACULTY OF ENGINEERING AHMADU BELLO UNIVERSITY, ZARIA, NIGERIAen_US
dc.description.abstractThis work was aimed at providing the most appropriate Nigerian Empirical-Mechanistic Flexible Pavement Analysis and Design method (NEMPAD) by incorporating Reliability, using First order reliability method (FORM), considering all the input variabilities, uncertainties, and seasonal variations, with the aid of Matlab to express the algorithms. A frame work was developed for computation of component reliability index (R.I), system reliability index (R.I), and probability of failure. Inputs parameters considered includes: traffic load, material properties, and environmental conditions. Four seasons were considered in the design namely: Hunturu(1 week Dec-2 week Feb), Bazara(2 week Feb-2 week May), Damina(2 week may-1 week Oct), and Kaka(1 week Oct-1 week Dec) seasons, for the North West geographical zone, and the cumulated damage was computed for each season. Comparism was made between deterministic and reliability methods. The results indicates that at coefficient of variation (COV) of 25% , a surfacing thickness of 100mm (representing wearing and binder course), 165mm thickness of Base course material, and 180mm thickness of sub base course material, are adequate, while at coefficient of variation (COV) of 42% a surfacing thickness of 100mm (representing wearing and binder course), 200mm thickness of Base course material, and 250mm thickness of sub base course material, are adequate, as against the deterministic method cited in Olowosulu (2005),where higher thicknesses were used, under the same traffic load and conditions. The results also indicated that highest level of damage with respect to fatigue was recorded during Bazara season due to the effects of Temperature, while highest level of damage with respect to Rutting was recorded during Damina season due to the effects of water in the subgrade.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/7868
dc.language.isoenen_US
dc.subjectINCORPORATION,en_US
dc.subjectRELIABILITY,en_US
dc.subjectNIGERIAN EMPIRICAL,en_US
dc.subjectMECHANISTIC PAVEMENT ANALYSIS,en_US
dc.subjectDESIGN SYSTEM,en_US
dc.subject(NEMPADS),en_US
dc.titleINCORPORATION OF RELIABILITY INTO NIGERIAN EMPIRICAL MECHANISTIC PAVEMENT ANALYSIS AND DESIGN SYSTEM (NEMPADS)en_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
INCORPORATION OF RELIABILITY INTO NIGERIAN EMPIRICAL MECHANISTIC PAVEMENT ANALYSIS AND DESIGN SYSTEM (NEMPADS).pdf
Size:
1.04 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.58 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
ENGINEERING