So if my understanding is correct then our unfactored bearing pressure should be less than (ultimate bearing capacity/1.6) and if that is so one should design the reinforcement with w=1.6 X unfactored bearing pressure. There is no need for any calculation of factored bearing pressure.
Thanks...
Bottom.
Loss of contact for my case is 8% for unfactored LCs whereas it is 41% in case of factored LCs. This high increase in loss of contact area in factored LCs is also due to the fact that the foundation is eccentric.
From the Tengs chart we take the modified bearing pressure(w') for the uplift case and calculate the moment w'L^2/2.
This approach gives higher design moment than what we get by multiplying the unfactored design moment by 1.6.
And that is where my question lies, which is the correct approach...
Hi All,
This is regarding a confusion that me and my colleagues faced regarding design of reinforcement of isolated footing.
Sizing of footing was done as per unfactored LCs. Since there was uplift, the bearing pressure was adjusted with the help of Teng's Charts.
So far so good but the...
Hi,
In commentary of ASCE7-16, it is stated that
"A strength level design wind speed map brings the wind loading approach in line with that used for seismic loads, in that they both are aimed at achieving uniform risk rather than uniform hazard."
Can someone please explain what is meant by...
Thanks to all for your replies!!
I too had the same notion as @WARose that this is a fictional problem or the use of a gear box.
Yes this is sort of exercise. I'm about to design a compressor but my lead advised me to go through this book and understand all the requisites of designing the...
Thanks @HTURKAK for the help. Ill definitely look for the book.
For a single piston I understand the forces are along the piston and another perpendicular to the piston, but none along the crank shaft axis.
In this case the unbalanced forces are acting in the direction of crank axis because its...
Hi,
I was going through the Design of Structures and Foundations for Vibrating Machines by C. Arya and O'Neill.
I found the solved example of a vertical reciprocating compressor fdn but couldn't understand the force direction which should be perpendicular to piston movement. In the attached...
