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Hello, I want to reinforce a sloped concrete headwall similar to the one shown in pic below. I know the loads, but, I am unsure how to consider the opening in concrete when it comes to stress analysis and reinforcement, rather it seems a complicated task. Is there any reference i could use to...

Thanks everyone.

Does ground motion with a low period always have a higher acceleration? if so why?

Can you explain how and why those instances occur? if we assume the wind hits in a constant direction.

Hi, Why does the internal wind pressure coefficient have two sign values?

Aha. Now it make more sense. I read the part of the thread for deriving qmax. It was helpful. Thanks Celt83.

Got you! So within L/6 from the center line both ways where we can guarantee that the whole footing will be under compression? But why L/6? and why qmax = (2P) / [3B (L/2-e)? Thanks for your patience.

Thanks @StrEng007 for your response ! Could you please let me know what is wrong with this solution? qmax= (60/24*8)+ (100*10*12*12)/(8*24^3)+ 2.5/8 = 1.93 ksf

Hi, could anybody help me solve this problem? I tried to solve it and I got the answer B. But the solution key shows C. Please see the picture below: