| dc.contributor.author | Limaye, Vidyadhar Narayan. | en_US |
| dc.date.accessioned | 2014-10-21T12:36:24Z | |
| dc.date.available | 2004 | |
| dc.date.issued | 2004 | en_US |
| dc.identifier.other | AAINR02126 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10222/54721 | |
| dc.description | Steel-free bridge decks, based on the concept of the arching action in confined concrete slabs, fail in punching shear at loads that are significantly higher than those for the unconfined reinforced concrete slabs, which typically fail in flexure. | en_US |
| dc.description | A full-scale model comprising four panels, each with a different internal configuration, was designed, constructed, and tested at Dalhousie University. The model was extensively instrumented to monitor its response under cyclic loading. An acoustic attenuation technique was also used to independently assess the extent of damage in the deck slab. In the first phase of testing, each panel was subjected to 1700 cycles of pulsating load with a peak value of 400 kN. The growth of cracks in each panel was charted and compared. An important part of this research was to assess the fatigue resistance of one of the deck slab panels with a pre-induced longitudinal crack, under asymmetrical loading conditions. Results from the first phase of the testing have shown that the crack width can be reduced significantly with the use of a bottom layer of nominal crack control reinforcement. | en_US |
| dc.description | In the second phase of testing, the control panel was subjected to a pulsating load of progressively increasing magnitude until failure. Two other panels with nominal crack control reinforcement were also subjected to pulsating load with peak magnitudes corresponding to 90% of their ultimate static failure load, while the panel with the pre-induced longitudinal crack was tested under monotonically increasing load to failure. | en_US |
| dc.description | This research has shown that the bottom longitudinal cracks do not affect the performance of the steel-free deck slabs under cyclic loading. Furthermore, it has been shown that the fatigue life of steel-free deck slabs exceeds the commonly accepted minimum fatigue life requirements by a wide margin. The aesthetic issue of the crack width has also been addressed adequately. It has been shown that, the width of the longitudinal crack can be controlled by provision of a bottom layer of nominal reinforcement. It has also been established that acoustic attenuation can be used successfully in conjunction with the conventional instrumentation to detect the structural degradation of concrete structures.* (Abstract shortened by UMI.) | en_US |
| dc.description | *This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Microsoft Office. | en_US |
| dc.description | Thesis (Ph.D.)--Dalhousie University (Canada), 2004. | en_US |
| dc.language | eng | en_US |
| dc.publisher | Dalhousie University | en_US |
| dc.publisher | | en_US |
| dc.subject | Engineering, Civil. | en_US |
| dc.title | Steel-free bridge decks under cyclic loading: A study of crack propagation and strength degradation. | en_US |
| dc.type | text | en_US |
| dc.contributor.degree | Ph.D. | en_US |
