000			03220nas|a2200409 i 4500
005			20260818113516.0
008			030815s2003 th uzm rtt 00| a1eng d
035			_a.b11893953
099		9	_aAIT Thesis no.ST-03-10
100	0		_aNay Lin
245	1	0	_aFatigue strength of hybrid ferrocement manhole covers
260			_aBangkok : _bAsian Institute of Technology, _c2003
300			_a55 leaves
490	1		_aThesis ; _vno. ST-03-10
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2003
520			_aThe fatigue strength of hybrid ferrocement manhole covers and conventional ferrocement manhole covers were studied experimentally by generating S-N curves. Hybrid ferrocement manhole covers were reinforced with commercial steel fibers of 2% by volume and conventional ferrocement manhole covers were reinforced without steel fibers. The skeletal steel and wire meshes were kept constant for both types of covers. High strength mortar of 14 days compressive strength 70 MPa was used of both types of covers. Four specimens from both types of cover were tested under static flexural test with central line load and the mean values of these ultimate static loads were subsequently used for establishing the fatigue test loading. Fourteen specimens from both types of cover were tested under fatigue test. The peak loads were kept at 85%, 80%, 75% and 65% of the ultimate static load respectively. The test results showed that the addition of steel fibers increased the flexural fatigue strength of the ferrocement manhole covers. It was found that the maximum percentages of ultimate static loads causing failure at two million cycles were approximately 67.55% and 64.23% for hybrid and conventional ferrocement respectively. In terms of expected number of cycles to failure, the hybrid ferrocement cover is 120% greater than that of conventional ferrocement cover. The results showed that fatigue strength of ferrocement manhole covers could be improved by the inclusion of randomly oriented short steel fibers in the mortar matrix.
650		0	_aFatigue
650		0	_aConcrete _xFatigue
650		0	_aReinforced concrete
700	0		_aPichai Nimityongskul, _eChairperson
700	1		_aKim, Kidu, _eExamination Committee
700	0		_aPennung Warnitchai, _eExamination Committee
710	2		_aAIT Partial Scholarship, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. ST-03-10
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B08886
907			_a.b11893953 _bmnait _cu
902			_a240404
998			_b0 _c030815 _dm _ea _fu _g0
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