Recent content by DavidLee24

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    Math Foundations -- Sign conventions in this soil pressure graph

    Oh, regarding the formula, it is calculated. I will go briefly on how the formula is obtained. Firstly, we calculated the total column load ..Q = Q1 + Q2 + Q3 + ... then, determine the pressure on the soil, q, below the mat at points A, B, C, etc..using the equation q= (Q/A) ± (Myx/Iy) ±...
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    Math Foundations -- Sign conventions in this soil pressure graph

    Hi Drakkith, but the value you mentioned eg. 400kN, 450kN ..that isn't the soil pressure as that is the axial load from above into the column. So the soil pressure at A is 36.81 kN/m² and at B, 31.86 kN/m² and finally at C is decrease to 26.91 kN/m² .. The soil pressure is obtained from the...
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    Math Foundations -- Sign conventions in this soil pressure graph

    Thanks again, for the reply. But as for X direction at C, if we divide them into X-Y axis, aren't it be in positive as the X-dir going to the right? I see that for +0.08y <--- it is at above, therefore positive, is it right?
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    Math Foundations -- Sign conventions in this soil pressure graph

    Thanks for the reply, Drakkith. I'm sorry for providing minimal info. I shall edit my post. EDIT : Not so sure why I couldn't edit my original post, but here's the additional information; q is the soil pressure; with the formula q = 31 ± 0.6x ± 0.08y (kN/m²) <--- computed x and y is the...
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    Math Foundations -- Sign conventions in this soil pressure graph

    Hey guys, so I stumbled across this, and I'm kinda confused on how do they get the sign convention of the value. I've attached the figure and also the soil pressure for better reference. Take for example at C, how do they get the minus and positive sign convention? Thanks a bunch. P/S : Please...
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    How to Obtain Reaction of Truss Pinned Connection A, B, and C?

    Thanks for the reply, Jay! I've been studying stiffness method to solve for this question. But I have several question that I would like to ask, (see attachment) From the truss, I put them into global coordinate, and named the member (in square), but I would like to ask about the arrow for...
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    How to Obtain Reaction of Truss Pinned Connection A, B, and C?

    Hey guys, Sorry for this newbie question, I would to ask how to I obtain the reaction of the pinned connection of A, B, and C (See attachment)? Do I really have to use Force-Method? I actually attempted to use Moment at different places and do simultaneously (Idk if it's the right thing to do)...
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    Microzonation vs Macrozonation

    Thanks JBA, for your reply. Now I'm cleared. Thanks again!
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    Microzonation vs Macrozonation

    Hey guys, I'm very interested on seismic-related subject, particularly the subject on the title, I've searched all over the internet, but there are many on microzonation but limited information on macrozonation. My question is, what is the difference between the two? Thanks.David Lee
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    Designing Shear Link for Multi-Point Loads - Hey Guys!

    Hey guys, I know this is a bad question but I would love to know how. Usually, in the examples, the loads are given as UDL where you can to find same reaction at both ends of beam. What if the beam loadings are with multiple point loads, (5 or 6 point load) and the reaction of the beam at both...
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