pedestrian Bridge
pedestrian Bridge
(OP)
I am designing a pedestrian bridge having a span of 90 feet and the transverse direction is 12.5' Steel tube trusses are being designed. For the floor I have a metal deck with concrete over a horizontal truss, Where the edges are the bottom chords of the vertical trusses, i have diagonals and vertical legs. In other words a trusses turned on its side.
The question I have: The aspect ratio for diaphragms must not exceed 4:1 Is there another aspect ratio for Bridges where i can use and delete the diagonals? In other words, the truss will become a Vierendeel truss? Does any one know if there is an aspect ratio. I try not to use the Vierendeel truss as each joint will be complete pen weld and will reuire UT. Your help will be very much appreciated.
The question I have: The aspect ratio for diaphragms must not exceed 4:1 Is there another aspect ratio for Bridges where i can use and delete the diagonals? In other words, the truss will become a Vierendeel truss? Does any one know if there is an aspect ratio. I try not to use the Vierendeel truss as each joint will be complete pen weld and will reuire UT. Your help will be very much appreciated.






RE: pedestrian Bridge
RE: pedestrian Bridge
RE: pedestrian Bridge
Thank you for your response. i thought of doing a Vierendeel Truss but it will be costly. Wleding and UT inspection for each joint.
I always use diagonal bracing where diaphragms exceed the aspect ratio.
Thanks again.
RE: pedestrian Bridge
Thank you for your response to my question. I am interested in your approach as I have not done it before. Is there a reference that you can lead me to read about?
I am going ahead in keeping the diagonals.
Thanks again.
RE: pedestrian Bridge
RE: pedestrian Bridge
thanks again. I will do my homework.
RE: pedestrian Bridge
RE: pedestrian Bridge
Thank you for the update. In our area we do not have freeze thaw effect. But I will mention to the Architect regarding any weep holes needed.
Thanks again.
RE: pedestrian Bridge
RE: pedestrian Bridge
Thank you for your input.
RE: pedestrian Bridge