hello,
i am studying beam deflection methods such as double integration or moment area method or conjugate beam method etc right now.
how can we know where the slope is 0 for a simply supported beam, with any distributed or point loads on it.
is the beam slope 0 where moment diagram is...
I was solving an AM problem on PPI exam cafe online . (Question number 59)
Think of a simple mechanism similar to a door knob, fixed to a wall only and free hanging like cantilever, with the part where you hold with your hand in the perpendicular plane. Imagine you are pressing with your finger...
ok i understand.
and another question for the reality implications of the test.
so, after the pore pressure dissipates, which depends on the in situ and proposed conditions as you said, we close the drainage. in reality this closing of the drainage means what then? because the sample had...
Hello
on All in One latest edition page 384 for PE preparation, the design of strap footings is asked.
In addition to axial loads, the also calculated a moment based on the axial load of one footing times distance to the other footing and borught it as a moment to second footing. and based...
when doing the consolidated undrained test, first we apply the chamber pressure and let the pore pressure develop in the specimen to dissipate, so it drains. and THEN we close the drainage line at the top and bottom and apply axial load, so the name "consolidated undrained". I understand this...
in a question i am solving about triaxial test, it says:
"In a drained triaxial test, a specimen is confined under pressure and axially loaded until failure."
but drained means, we let the specimen to drain, which means it must be unconfined isnt it? why do they say confined? what am i missing...
for a square footing, i know the shape factors are not always the same but i saw one which is very different when i was solving a question for PE preparation. for example, in the formula I have, there are shape factors of 1.3 for c, 1 for q and 0.4 for gamma.
but on a question i saw, i saw...
In a question I am solving it says the following for PE exam Geotech it asks:
A 4 x 4 ft footing is in sand for which the bearing capacity factor is 15. The sand is intended to limit the applied pressure on this footing to a value that will control settlement. What is the modulus?
First of all...
on a pipe network analysis problem, when comparing the heads between the two adjacent points, when writing the energy equation, they took into account only the elevation and pressure heads. why didnt they take velocity head into account?
This is the question In the 13th edition of practice...
In question number 69 of six minute for geotechnical, for PE exam study, it tells us to calculate the skin friction based on Beta Method, and uses cohesion of the soil layers to calculate. no angle of friction between pile and soil is given, the question doesnt talk about it. so it uses the beta...
in question 17-2 of practice problems for the civil engineering pe exam by michael lindendburg, 13th edition, there is a pipe that connects points A and B. it gives pipe length, diameter, pipe material, temperature of water and the flow rate Q. B is 60 feet above Point A. it asks the pressure at...
I was solving a question for PE preparation about piles. it calculates the perimeter of each pile and the the perimeter of a two pile group and since the preimeter of group is bigger, it says no group action reduction is needed.
so does it mean the group action means a reduction with respect...
okay thanks now i understand the geometry.
based on that understanding, i looked at the solution again. this time i saw that they subtracted the active pressure from passive pressure at the portion below the dredge line.
so they made
Kp x gama soil x height below dredge line (minus)...
thanks and i will now review the reference you gave. but I couldnt draw anything, as it is the problem. I can not visualize the geometry of this question in my head... i am not very familiar with bulkhead installations.
Hello,
In a question I tried to solve when preparing for PE exam, there is an anchored bulkhead supporting an excavation wall. I can not construct the geometry of the problem in my head.. so i couldnt understand the solution.
The question says, an anchored flexible bulkhead, which is fixed from...
When calculating the active or passive earth pressure at retaining walls, if there is friction between wall and soil, and that friction angle is given , then we use coulomb formula (that long one) even if there is no incination of backfill or wall correct?
if so, in question 76 of six minute...
In six minute solution for geaotechnical, problem 51
you place a very large area of fill on a clay layer of 30' thick. water table is at ground surface at first.
they ask the consolidation settlement of clay due to the loading by the fill surcharge and also they are saying that the water table...
ok i see, and thanks... but now here is my next question based on this info... if past is not considered at all, then 10' should not even be considered at all. and we should use 2' right away.. why is the discussion of slab present vs not present then? or the other users answers about using...
ron & ms squared: thanks for answers but even if there was no slab, that soil below footing was carrying 10' of soil weight in the past. so still shouldn't we use 10' in our calculation even if no slab with that logic? or did i not study enough of bearing theory yet and that depth component is...
