Beamless raft ground stress

[SCETCHER]

I think I was misunderstood. I agree with what you said about the design of the system, there is no such thing. I am sending an example attached. beamed raft version of the previous project. When I define the continuous foundation beam between the s07-s10 columns and the s08-s11 columns, the raft flooring in that area does not save the ground tension, but when I do not it saves it. I guess you have never solved a hollow block before. idecad is a program that calculates according to the joint point and if you make a stud, it creates a new joint point and causes you to give a point load to the beam. First of all, it is nonsense to make studs in beams running horizontally in this way. Secondly, it is nonsense to make studs in the foundation beams. Third, check the rib directions. It's totally ridiculous. It's very important which load you transfer to where. you always transferred the loads on the ribs to the long span beams. instead, transferring it to short span beams and dividing it with a spreader beam gives a more positive result. If this project of yours is implemented, woe to those who live in it. I can't help but mention that I am a construction technician and I think it is the civil engineer who made this project

 

[SCETCHER]

Hi; After the analysis in the beamed raft foundation project I sent attached, I wanted to review the soil stresses from the reinforced concrete/continuous foundation menu. But the screen is completely blank. Values do not appear when selecting combinations. Only the minimum, average and maximum values appear. I have another question. I chose the raft floor thickness of 50 cm, the coating load of 0.15 tons/m2 and the live load of 0.2 tons/m2. After the analysis, the raft slab loads changed. The G, Q values of each raft differ from each other, with G varying around 20 tons/m2, and Q around -4 tons/m2. I couldn't figure out the logic of this. I am waiting for your help.

Hello, It is normal for the G and Q values to change in each eye in the rafter raft system, because the loads from the columns to each raft slab are calculated separately for each slab, and then distributed from the slabs to the continuous foundation beams with finite elements. Since the program does not have the possibility to examine the stress values in the 3d frame mode on the beamed raft, you cannot see those values. Good work...

G LINE IS ACHIEVED BY THE PROGRAM AUTOMATICALLY COLLECTING THE CONCRETE THICKNESS AND THE COATING LOAD YOU DEFINE. CONCRETE UNIT WEIGHT 2.5 t/m3 TYPE. WHEN YOU MAKE 7 CM HOLDER FLOORING, THE WEIGHT OF 175 KG CONCRETE ADDITIONAL TO THE G LINE. YOU NEED TO DEFINE THE FLOOR AND COATING LOAD FROM YOUR FLOORING ROW. FOR EXAMPLE, YOU WRITE IN FLOOR SETTINGS TO LINE G HOSPITAL LOAD(125KG) AND COATING LOAD(175KG FOR TILE) TOTAL 300 KG AND SAID OK. WHEN YOU DEFINE FLOORING, YOU WILL SEE 475 WRITTEN ON LINE G. YOU CANNOT SEE THIS LOGIC, BECAUSE THE BEAMS ARE THE PRIMARY CARRIER ON A RADIUS WITH BEAM YOU WILL SEE THAT THE LOGIC IS THE SAME WHEN YOU SOLVE A RADIUS WITHOUT BRAID.

 

[gürkan]

I am having the same problem as you. In my project, the floor is very bad. When the eyes are small, the floor exceeds the safety stress, but I think this is important at the points where you connect the foundation beams under the columns or curtains. But in general, there is a problem when the eyes get smaller. In these cases, is it okay if we define tie beams in these places to ensure continuity? it would be nice if the authorities could write an answer to this question ............................................. ......

 

[gürkan]

I am having the same problem as you. In my project, the floor is very bad. When the eyes are small, the floor exceeds the safety stress, but I think this is important at the points where you connect the foundation beams under the columns or curtains. But in general, there is a problem when the eyes get smaller. In these cases, is it okay if we define tie beams in these places to ensure continuity? it would be nice if the authorities could write an answer to this question ............................................. ......