01865nam a2200241   450000500170000000800410001703500150005810000280007324500860010126000520018730000140023949000270025350001430028050200570042352008230048065000230130370000360132670000440136270000420140671000510144881000590149985600650155820260818175431.0050898         th                  eng    a.b105438551 aInbanathan, Mahil Jacob10aRandom vibrations of a girder bridge due to a vehicle moving over a rough surface  aBangkok :bAsian Institute of Technology,c1982  avi, 63 p.1 aThesis ;vno. ST-82-08  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering School of Engineering and Technology  aThesis (M.Eng.)- Asian Institute of Technology, 1982  aThe dynamic response of a box girder bridge due to a vehicle moving across the span is presented. The effect of the randomly varying dynamic force generated by the vehicle moving over a rough bridge deck  is considered in the analysis. Discretized equations of motion for a lumped mass system, obtained using the finite element approach, are solved using the Newmark integration method.  A comparison is made of  results obtained by modelling the vehicle as an unsprang mass and as a force. A statistical analysis of the results shows that, for the system analyzed, peak impact factors for deflection, moments and shear are considerably greater than those normally prescribed in bridge codes, especially when the vehicle is· moving at high speed. The effect of vehicle mass is also more significant at higher speeds.  0aGirdersxVibration1 aWireland, Martin, eChairperson1 aLoo, Yew-Chaye, eExamination Committee1 aOgawa, Junji, eExamination Committee2 aThe Australian Government, eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. ST-82-08  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B21343