nick269
Geotechnical
- Feb 9, 2006
- 14
Hello everyone.
I have 2 questions.
(1) I am calculating the reaction force on box culvert junction structures which connect 2 sections at an angle of 90 degrees. This is an improvement of an existing canal, and this extreme angle is the result of resettlement constraints.
Using the momentum equation:
Reaction Force (x direction) = (M[out] - [M-in]) - (pressure[in] - pressure[out])
For this case, there is no flow out in the x direction, so the equation becomes
Rf (x direction) = -M[in] - pressure[in]
Is this the right approach? What influence does the flow out in the y direction have? Should I calculate it and sum to find a total reaction force? I don't think that is valid since cosine 90 deg is 0.
(2) Related to the above: Does anyone have any advice on calculating the internal forces in multicell box culverts? I am familiar with the formula for circular pipe, but I don't think that is applicable.
Thanks
Nick
Ho Chi Minh City, Vietnam
I have 2 questions.
(1) I am calculating the reaction force on box culvert junction structures which connect 2 sections at an angle of 90 degrees. This is an improvement of an existing canal, and this extreme angle is the result of resettlement constraints.
Using the momentum equation:
Reaction Force (x direction) = (M[out] - [M-in]) - (pressure[in] - pressure[out])
For this case, there is no flow out in the x direction, so the equation becomes
Rf (x direction) = -M[in] - pressure[in]
Is this the right approach? What influence does the flow out in the y direction have? Should I calculate it and sum to find a total reaction force? I don't think that is valid since cosine 90 deg is 0.
(2) Related to the above: Does anyone have any advice on calculating the internal forces in multicell box culverts? I am familiar with the formula for circular pipe, but I don't think that is applicable.
Thanks
Nick
Ho Chi Minh City, Vietnam