I reiterate.
I understand. You understand.
I stated the situation clearly. You are handwaving & dancing.
You said (exactly) "Transverse wind loads? They produce a bending moment at the bottom, blue platform. Which is transmitted via the hat truss frames to the core and perimeter columns as shear forces/moments."
http://www.internationalskeptics.com/forums/showthread.php?p=4760121#post4760121
You can take your pick of errors, Heiwa.
1. You said that "transverse wind loads produce a bending moment" at the base of the antenna. This is wrong, as you are NOW correcting. Transverse wind loads produce a bending moment AND a shear load.
2. You said that "the bending moment is transmitted to the core and perimeter columns as shear forces". This is wrong. Bending moments do NOT turn into shear forces in the midst of cantilever beams.
The second one caught my eye, because I've taught this theory to many young engineers (undergrad & degreed).
Sure. Whatever.
Irrelevant. In your OP, you were talking about the MOMENT at the base of the mast, not the shear.
Irrelevant. In your OP, you were talking about the MOMENT at the base of the mast, not the vertical load.
Ahhh, I see.
You, offering deceptive technobabble to the non-Mech Engr's here, is NOT off topic.
But my comments, correcting your nonsense, is.
Got it.
It is. It's even MORE fascinating when it's correct.
tom
I understand. You understand.
I stated the situation clearly. You are handwaving & dancing.
You said (exactly) "Transverse wind loads? They produce a bending moment at the bottom, blue platform. Which is transmitted via the hat truss frames to the core and perimeter columns as shear forces/moments."
http://www.internationalskeptics.com/forums/showthread.php?p=4760121#post4760121
You can take your pick of errors, Heiwa.
1. You said that "transverse wind loads produce a bending moment" at the base of the antenna. This is wrong, as you are NOW correcting. Transverse wind loads produce a bending moment AND a shear load.
2. You said that "the bending moment is transmitted to the core and perimeter columns as shear forces". This is wrong. Bending moments do NOT turn into shear forces in the midst of cantilever beams.
The second one caught my eye, because I've taught this theory to many young engineers (undergrad & degreed).
Hm, let's get our coordinates right; x-axis is in the E-W hat truss beam, z -axis upwards (or downwards!), y-axis in the N-S hat truss beam. Say wind load is applied in x-z-plane in x-axis direction.
Sure. Whatever.
The shear force at the bottom of the vertical mast due wind loads ...
Irrelevant. In your OP, you were talking about the MOMENT at the base of the mast, not the shear.
The vertical force applied on the hat truss due to the mass of the mast (in the z-axis) ...
Irrelevant. In your OP, you were talking about the MOMENT at the base of the mast, not the vertical load.
Start another thread about it.
Ahhh, I see.
You, offering deceptive technobabble to the non-Mech Engr's here, is NOT off topic.
But my comments, correcting your nonsense, is.
Got it.
Fascinating stuff.
It is. It's even MORE fascinating when it's correct.
tom
