Recent content by Mac75

How to calculate allowable tensile stress in Post Tensioned Bridge Assessment. Any help would be great. Thanks

Hi I have designed a U frame footbridge.The fabricator has proposed to split the bridge in 3 section at cross members level. The cross members are 120x120x8mm SHS.The design loading on cross members are:- Moment 20kN.m Shear 20kN Tension 22kN The fabricator proposal is to use a plate 25mm thk...

I have modelled the above bridge as a 2D Grillage.I would like know that do you have to model the End/Anchor blocks into your model? Any help would be great.

I am doing an assessment of a bridge which has span 1 & 4 Prestressed Beams and Span 2 & 3 Post Tensioned Beams. The beams at intermediate supports are sitting on rubber bearing pads. I have modelled the bridge as 2D Grillage.Do I need to model the hogging section properties for the beams over...

The supports have been modelled as Fixed at one end & Rocker at other end.

Thanks ishvaaaq. The footbridge is designed with CHS for top & bottom chord & also bracings.The cross members are SHS. the longitudinal members to support the decking are channel section & unequal angles. Is there any guidance to check this bridge with a simple 2D model? Please help me.

I have modelled a U Frame footbridge as a 3D grillage but for some reasons i am getting high axial forces and moments at the bottom chord which is failing the check for combined axial & bending.The deck is at bottom chord level. The bridge is simply supported and Span is 20m,height is 1.8m and...

I would like to know do you have to consider any effects of tendons while working your stresses in diaghragm. There are 4nos of Tendons located between top flange & web connection. Any help would be great.

Thanks ishvaaag.

Hi i am looking for help on Post Tensioned Box Beam girder bridge assessment.I have modelled the bridge as 2D Grillage.I have split the box beam into I section and C section at ends.I would like to know that how can you calculate stressess in the web & diaphragm opening in 2D Model. The Box...

Hi i am looking for help on Post Tensioned Box Beam girder bridge assessment.I have modelled the bridge as 2D Grillage.I have split the box beam into I section and C section at ends.I would like to know that how can you calculate stressess in the web & diaphragm opening in 2D Model.

Hi i am looking for help on Post Tensioned Box Beam girder bridge assessment.I have modelled the bridge as 2D Grillage. I have split the box beam into I section and C section at ends.I would like to know that how can you calculate stressess in the web & diaphragm opening in 2D Model.

I am looking for some help on assessment of post tensioned box beam bridge.I have modelled it as a 2D Grillage.How can i analysis the web & diaphragm stressess in it? Any help will be appreciated.