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035 _a.b10231237
099 9 _aAIT Thesis no.ST-88-15
100 1 _aLorenzo, Jesus N.
245 1 0 _aEffects of prestressing force on mechanical behaviour in shear of prestressed concrete beams
260 _aBangkok :
_bAsian Institute of Technology,
_c1988
300 _a151 p.
490 1 _aThesis ;
_vno. ST-88-15
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1988
520 _aPrestressed concrete beams were tested to investigate the mechanical behavior in shear with the scope of conducting a detailed experimental observation on the effects of varying levels of prestressing force on shear crack displacements and stirrup stress as well as the shear cracking behavior of the beams . The magnitudes of the crack opening and shear displacement were meticulously measured using contact gage points. Forces transferred along the diagonal cracks were determined applying the Li- Maekawa Model on Contact Density Function to the measured crack displacements. The crack opening and shear displacement ratio decreases for beams with higher applied prestressing forces, so that the stresses transferred by aggregate interlocking along shear crack surfaces were found to be greater with higher prestressing force while stirrup forces along the shear crack are smaller. Total forces transferred along the shear crack, which is the summation of forces transferred by aggregate interlocking and by the stirrup, were observed to be grater with higher prestressing force.
650 0 _aPrestressed concrete beams
700 1 _aUeda, Tamon,
_eChairperson
700 0 _aWorsak Kanok-Nukulchai,
_eExamination Committee
700 0 _aPichai Nimityongskul,
_eExamination Committee
710 2 _aDAAD (German Academic Exchange Service)
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. ST-88-15
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B18640
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