• Apeksha D. Naharkar
• Amey R. Khedikar

For development of industrial society and global economic expansion, the construction of long span bridges nowadays has rapidly increased. Besides, the construction methods have undergone refinement and they have been further developed to cover many special cases such as progressive construction of cantilever bridges, span-by-span construction of simply supported or continuous spans, balanced cantilever method etc. Currently, among these construction methods, the segmental construction of post-tensioned bridges has been recognized as one of the most efficient type for bridges. This method has great advantages over other kinds of construction, particularly in urban areas where temporary shoring would disrupt traffic and services below, in roadways and over waterways where falsework would not only be expensive but also a hazard. The use of precast segmental construction for concrete bridges has increased in recent years due to the demand for shorter construction periods and the desire for innovative designs that yield safe, economical and efficient structures. In this explorative study, a span of 25 m of a post-tensioned segmental bridge has been designed using limit state method in correspondence to IRC: 112-2011, considering the ultimate limit state of strength and serviceability as specified in the code. At Chinchwad, Pune, a bridge is under construction which is designed by using working stress method. The aim of this study is to analyses and design a 25 m span of the same segmental bridge having a width of 8.4 m using limit state method i.e. IRC 112:2001. A two lanned road carrying live loads IRC Class 70R and IRC Class A as per IRC 6:2014 is designed. Internal type of prestressing system is adopted and precautionary provisions will be given for external prestressing as per SP-65. The minimum dimensions of the segments are in accordance with clause 9.3 of IRC: 18-2000 and the final dimensions are according to the parameters of design. The prestressing losses are also considered as specified by IRC 112:2011. The manual structural analysis is compared by taking aid of midas-civil, a software for analysis and design of post tensioned bridges.

Post tensioned segmental bridge, limit state method, working state method, prestressing losses, midas civil software.

"Investigation of Post Tensioned Segmental Bridge by Limit State Method", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.162-167, May-2019, Available :http://www.jetir.org/papers/JETIR1905G23.pdf

"Investigation of Post Tensioned Segmental Bridge by Limit State Method", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp162-167, May-2019, Available at : http://www.jetir.org/papers/JETIR1905G23.pdf