02078nam a2200253   450000500170000000800410001703500150005810000220007324500850009526000590018030000100023949000210024950200590027050001700032952009600049965000230145965000250148270000400150770000480154770000500159570000540164581000600169985600650175920260818085509.0181197         th                  eng    a.b101774620 aSrisawat Ahviphun10aCritical stresses induced by wheel load and braking forces in flexible pavements  aBangkok :bSEATO Graduate School of Engineering,c1964  a29 p.1 aThesis ;vno. 75  aThesis (M.Eng.) - SEATO Graduate School of Engineering  aA thesis submitted in partial fulfillment if the requirements for the degree of Master of Engineering in the SEATO Graduate School of Engineering, Bangkok, Thailand.  aIn most flexible pavement analysis only vertical load is considered; this thesis is concerned primarily with effects resulting from the addition of a horizontal load applied at pavement surface. A horizontal load is created by deceleration of a vehicle on the pavement. In this study the braking force was assumed to be 30 percent of the wheel load. The equations used in this paper are those derived by Vicharn Danvivathana, for the case of homogeneous, isotropic, elastic materials of infinite extent when Poisson's ratio is equal to 0.5. A 9000-lb wheel load was selected for the analytical example. Tires were in the 11.00 series, with a tread width of 8.00 in. and inflation pressure of 90 psi. The analysis indicates that the shear force caused by braking of a vehicle induces significant stresses in the pavement system. This effect is especially pronounced at shallow depths under the pavement surface and should not be ignored in pavement design. 0aPavementsxTesting 0aStrains and stresses1 aProf. Utai Voodhigula,eChairperson1 aDr. Chai Muktabhant,eExamination committee1 aProf. John Hugh Jones,eExamination committee1 aDean Milton E. Bender Jr.,eExamination committee2 aSEATO Graduate School of Engineering.tThesis ;vno. 75  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B23161