03220nas|a2200409 i 4500 20260818113516.0 030815s2003 th uzm rtt 00| a1eng d .b11893953 AIT Thesis no.ST-03-10 Nay Lin Fatigue strength of hybrid ferrocement manhole covers Bangkok : Asian Institute of Technology, 2003 55 leaves Thesis ; no. ST-03-10 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering Thesis (M.Eng.) - Asian Institute of Technology, 2003 The 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. Fatigue Concrete Fatigue Reinforced concrete Pichai Nimityongskul, Chairperson Kim, Kidu, Examination Committee Pennung Warnitchai, Examination Committee AIT Partial Scholarship, Scholarship donor Asian Institute of Technology. Thesis ; no. ST-03-10 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B08886 .b11893953 mnait u 240404 0 030815 m a u 0 mnait mnarc 22 40 Barcode : 30050120745657 CREATED : 2014-04-29 RECORD # : i12792895 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160067582 CREATED : 2016-04-19 RECORD # : i1293771x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 43514 43514 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.ST-03-10 30050120745657 2026-08-18 11:35:16 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ST-03-10 30050160067582 2026-08-18 11:35:16 1 2026-08-18 40