Open Arch / Dome Roof Wind Loads Per ASCE 7-10

[rcatalina85]

I am currently working on the design of an open arch canopy system, and there is not much guidance for this type of roof system. Does anyone have any references or know if ASCE has any additional design examples available? I am having a hard time finding any information.

In order to work around this, I have a couple of approaches in mind.

1. Utilize Figure 27.4-5, and break the arch into segments at 7.5 deg, 15 deg, 22.5 deg, 30 deg, 37.5 deg, 45 deg, and step the pressure coefficients. Not too thrilled with this approach as I do not think it will accurately model the vortex of a dome shape.

2. Utilize figure 27.4-3 for arched roof (Enclosed, Partially Enclosed),and determine the imaginary wall pressures on the windward and leeward face. Then combined the wall pressures with the roof pressures and treat it as one big overhang.

I really appreciate any input and guidance.

Thanks in advance!

RJC

 

[SAIL3]

sketch and wind loads would help.....

 

[rcatalina85]

SAIL3, See attachment below. The design wind speed is 120 MPH, Category B Exposure. After some thought I am thinking about using a combination of the Open gable and Open mono slope coefficients. Just trying to make sure proper judgment is used. I am sure this is not the first time an open arch roof has been designed. I am surprised with the lack of direction in the code.

-RJC

 

[SAIL3]

how about a little more detail....how deep in/out of the sketch(plan view) ...how is it supported...how high is it off grade, etc....