Long Span Arch Bridges in India: Design Aspects and Aesthetics
Tharia Bridge over river Wahrew, Meghalaya, Steel Arch span 165 m
Tlawng Bridge on NH 44A, Mizoram, Steel Arch span 100 m
Sanjenthong Bridge at Imphal, Steel Bow String Girder Span 56 m
Wahjapuh Bridge, Meghalaya, RCC Arch Span 62 m
Kalipai Bridge, Meghlaya, RCC Span 79 m
In all the above bridges, proportion, order and symmetry are well applied and the structures so produced have aesthetic value. A steel intensive scheme for the arch superstructure has been adopted for Wahrew, Tlawng and Sanjenthong Bridges to solve site constraints of less working season and very high velocity of flow, to improve the aesthetics and to take advantage of the lightness of the structure whilst erecting and improving seismic performance of the structure. Wahjapuh and Kalipai are designed as RCC Arch Bridges.
Design Criteria for preserving existing landscape, complementing and even enhancing the settings have been given weightage. Various components are designed to work together and complement each other visually with aesthetics integral to the design. Five important aspects such as form, character, detail, scale and proportion have been considered from first principles. The bridges should stand as proud inheritor of Indian tradition of bridge design and construction.
KeywordsAesthetics Trussed arch Bridge design Composite deck Steel box section arch HTS hangers Steel Bow String Girder RCC Arch
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