You are watching: K truss bridge advantages and disadvantages
The basic concept of developing a bridge in the K-truss structure is that it is consisted of of shorter members and due come the visibility of much shorter members it deserve to resist buckling indigenous compression come a great extent. But due to its complexity, the is rather unpopular among designers. Another very important defect of K-Truss is a member might be in compression under one fill scenario and in stress under another. This deserve to mean the structure may not have the ability to be optimally designer.An instance of a K-Truss setup and also its reaction under an used load is presented below.Compressive members are shown asgreenand stress and anxiety asred.
But what actually makes K-Truss unique?it is clear the the truss type is a cross in between a Parker and a Pennsylvania petit however feature two subdivided diagonal line beams every panel that meet at the centre of the vertical beam, featuring the letter “K” in the alphabet.
There space two varieties of K-trusses that exist:one that functions the subdivided beams walk outwards away from the center of the span, developing a rhombus shape at the center of the span.other type features subdivided beams going inwards, in the direction of the centre of the span, creating the letter “X”.This truss architecture is one of three that attribute diagonal beams the same, similar thing a letter in one alphabet. The various other two are the Warren (with the W-shape) and also the Howe lattice or double-intersecting Warren, which feature the letter X. Technically, a two-panel Warren truss design, resembling the letter V additionally counts in the mix.
According to information collected to date, the K-truss came into existence in the unified States throughout the age of standardisation in the 1920s. During that time, fancier however structurally deficient truss designs, such together the Thacher, Kellogg and also Whipple trusses, were either phased the end or modified v heavier truss beams and riveted relations with the score of dealing with heavier volumes of traffic.
In IndiaDigha–Sonpur leg is a K-truss Bridge throughout river Ganges, connecting Digha Ghat in Patna and Pahleja Ghat in Sonpur. The leg was completed in respectable 2015. The bridge provides easy Roadway and also Railway link between Northern and also Southern components of Bihar.
Earlier, Rajendra Setu to be the only bridge that carries railway tracks across the Ganges in the state that Bihar. It was opened up in 1959. Originally sanctioned as a rail bridge, the Ganga Rail Bridge job was convert to a rail-cum-road bridge in 2006. The full cost of the job was put at 13,890 million, out of i beg your pardon 8,350 million was for the rail part, and 5,540 million to be for the road part. The was supposed to be completed in five years. As soon as completed, the 4,556 metres (14,948 ft) leg is amongst the longer bridges in India. The total length that construction, consisting of approaches, would be 20 km. Rail component of the bridge was inaugurated in 12th in march 2016.
Reduced compression in vertical members.Possible reduction in steel and also cost if design efficiently.
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Disadvantages:-Slightly much more complex.Increased constructibility early to added members.
Labels:bridge structures.,design,digha-sonarpur bridge,k-truss,rajendra setu,structural analysis,truss