Without the introduction of haunches, this may be difficult to achieve in free-standing sawtooth staircases.
It can therefore be seen that continuity of reinforcements is an important detailing requirement of cantilevered type structures. The same requirement of reinforcements extending cantilever reinforcements applies to reinforced concrete beams too. In reinforced concrete slabs, the cantilever reinforcement should extend into the back-span by at least 0.3 times the span of the back-span, or 1.5 times the length of the cantilever, whichever is greater.
In cantilevers, the main reinforcements are provided at the top (the tension area), and furthermore, they must be properly anchored and/or extended into the back-span for good anchorage/development length, and to resist the hogging moment that exists at the back of the cantilever. Figure 6.Fig 1: Typical section of a free-standing sawtooth staircase
Moving load analysis of a Super T girder bridge entails a series of analyses for all loading conditions created along the entire moving load path (Traffic lane) to find the maximum and minimum values used as the results of the moving load cases in the load combinations.
Moving load analysis as per AS 5100 can be performed. Wind load, temperature uniform load, temperature gradient load can be calculated as per AS 5100 and then applied in the model. The ones that you will use will depend on which of the two design philosophies that have been chosen for your project. Define static loads and moving loads as per AS 5100 Last Revised: ASCE 7-05 provides load combination equations for both LRFD and ASD. We shall perform linear accumulated construction stage analysis, and the results of the CS analysis will be used in load combinations with relevant load factors.
The webinar shows how to model, analyze, and design Super T girder bridges as per AS 5100.