Analysis & Design of T-Beam Bridge over Rangiya Nala

K. P. Dash; T. K. Lohani; D. R. Senapati; B. K. Ojha

Abstract

Abstract Bridges serve as the means of transportation over river or valley or to provide ease of transportation over crossings. They act as catalyst in booming the local economy. Design of bridges has a special importance in the field of civil engineering. Bridges range from timber to pre-stress. However, the design of T-beam bridge is always a better choice where underneath transportation is prohibited during construction and the span of the bridge is restricted to 25 meters. T-beam bridge decks are one of the principal types of cast-in place concrete decks with concrete slab integral with girders. The analysis procedure also changes with time i.e. initially from working stress method to ultimate limit state method. Different countries have adopted different methods whereas in India the limit state method of design is prevalent due to its economy and predictability. IRC: 112, the code of practice for concrete and pre stressed bridges, restricts the use of working stress method of analysis in the design of bridges. The proposed bridge has two piers against four piers of the existing bridge in order to allow more waterways. Also due to reduction in number of piers, piles and pile caps, better economy is achieved in terms of approximate 30% material reduction when the number of piers is halved. Under-reamed pile foundation is provided keeping the soil strata in mind as well as from reference of National Highway Division. Keywords: T-beam bridge, limit state method, working stress method, pile caps, IRC

Analysis & Design of T-Beam Bridge over Rangiya Nala

Abstract

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