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Found 28 results

  1. Hello every one i modeled a flat plate with SAFE and after i run the analysis i got different results when i compare FEM with strip Forces for both M11 and M22 these is so much different . one more thing , i solved the same example with direct design method and when i compare it with Strip forces from SAFE there are good agreement , but when i compare it with FEM result by SAFE there are big differences !! does any one have information thanks
  2. Kindly recommend articles or books regarding the basics of the these softwares. Mainly describing the user interface, tools and some practical examples.
  3. Combined Raft Proximity Questions

    Salam Alaykom All, I am modeling a refugee camp on Etabs. I have over 20 buildings to be modeled, each 5 share the same raft foundation , and each raft foundation is no more than 3 meters away from the other. For simplicity I modeled all 20 buildings in the same Etabs Model to Calculate the forces on the raft foundations. My question is : 1_ Will the Raft Foundations be Affected by each other , knowing that the buildings they support arent connected in any way?
  4. SAFE FOUNDATION DESIGN

    I have modeled B+G+6 story in etabs and exported its base with 9" thick and 12 feet high RCC wall with option (export floor loads plus column and wall distortion). In Safe initially i defined raft and soil support properties. after analysis the minimum soil pressure was out range (7 ksf) while my allowable limit was 2.25ksf. Then i selected all the joint points of wall and assigned them fix supports the soil pressure suddenly reduced to almost zero value. Question is that which strategy of modeling is correct? Secondly when we export wall from etabs to safe its property changes to beam why this happens? Model is attached below. Raft 12.FDB
  5. FOUNDATION DESIGN IN SAFE

    How to check the soil pressures in SAFE? What is difference between min and max pressures? and what is allowable limit?
  6. Assalam o alaikum, I am having a building with a semi circle shape. None of the footing is either parallel to global X-axis nor to the global Y-axis. The plan of footings is attached. The problem I am facing is, ETABS reports joint reactions along global X-axis and global Y-axis instead of along the local axes of column. Since my columns are at a degree to global axis, the joint reactions also becomes at a degree from column and footing. Since to use simple combined stress formula of stress = P/A + Mx*Y/Ix + My*X/Iy I need forces along axis of footing. Or i will have to resolve either moment of inertia of footing along direction of forces or vice versa, which is quite tough and time taking. The other option I can go for is to design footing in SAFE. But again here, there i dont find any option to rotate footing at a certain degree to match orientation of columns. If i rotate local axis of footing, It only rotates its local axes and meshing but not the footing physically itself. The orientation of footing remains same. How can i solve this problem? Either having reactions in etabs along local axes of columns can solve my issue so that i can design it manually or rotating footing in safe to match local axes of columns can solve my issue. So can any one guide me how to do either option? Thanks.
  7. I'm designing a flat slab structure with perimeter cladding that is to be anchored to the edges of the slab. The external cladding has a total weight per meter run of 5 KN/m. How can I apply this load to the slab edges so as to model the true behavior of the slab under loading in order to get accurate results from the analysis?
  8. Exporting Model to SAFE from ETABS

    Assalamoalaikum Brothers. i am new in this forum and i am using SAFE for the first time.In one of our project we need data for a continuous footing connected with beam foundation.My superior wants me to give result on this within tomorrow.i have drawn a model in ETABS2015 and get results of foundation load.but i do not know how to export or for exporting how to draw this footing with beam in ETABS2015.Can you please help me in this problem?.just for immediate result.After tomorrow i will study about safe.But tomorrow i need immediate result.So please help me how to proceed on this topic like Engr. Waqas Brother.
  9. Raft Modifier

    What could be the purpose of reducing raft stiffness by 60% (m11=m22=m12 modifiers of 0.4) in SAFE Model?
  10. Modeling Pits In Raft

    Dear SE Pakistan Members, I am trying to model pits in Raft in CSi SAFE. PIT Bottom slab is depressed 2m below the Top of RAFT. I have following concerns which I would be glad if anyone can address. 1- What is the criteria/condition to analyze raft slab at one level (continuous) and pit/ raft on different level. 2- What is the appropriate method to utilize in SAFE to model RAFT with Pits. I came across option of Vertical offset in SAFE and the other is to model wall at periphery and model slab at bottom. Generally, we model same raft thickness below PIT depressed at 45 degree angle . For this reason, I always modeled PIT on same level as that of RAFT. (See Attached Pic for RAFT Plan & Section of PITS).
  11. Foundation Design In Safe

    Hi I have designed a footing in SAFE software. I am just wondering how to check its stability against overturning in SAFE. If anybody knows, please help. Regards Goher Ahmed
  12. Hello everyone! Sorry if this question has been raised by someone else. I used the slab element to model floor slabs and pile caps. Things were fine until I changed the mesh size to a smaller one. The reinforcement became extremely large at some points, like a concentration. I changed the mesh size from large to small, and the problem became severe. Hence I wonder is this negligible? How fine should I mesh? I have encountered similar situation in SAP modeling. Thanks for your comments or suggestions.
  13. Uplift Pressure & Foundation Settelement

    Hello to all .. i'm wondering if anyone could help me to calculate uplift pressure and foundation settelement by using csi safe !! i wanna do this becuse there's many cracks appears in the school structures and i wanna to know the reason ? thanks in advance
  14. Engineers; I have strips in slab designing of 1 meter width ... near the column appeared additional steel to be provided like this: exactly over the column it needed 14T16 right one and left one : 3T16 what is the additional steel shall I put?? because an experienced engineer provided only T16/20 cm ( 5T16/m) is that true???
  15. Please help me in understanding what is load size in csi safe footing design. What data should i input in load size?
  16. As'salam o Alikum! Kindly give me some information about the civil engineering institute located in islamabad (preferably) of elsewhere.? Thanks!
  17. Mat Or Footing Option In Safe

    assalam o alaikum, Dear Seniors, Kindly clarify what is the difference between MAT and FOOTING option in SAFE while defining slab property. Thanks.
  18. Dear Members, I am trying to model a Raft in Csi SAFE with water uplift pressure applied as a negative surface load on Raft. After analyzing the model, I get negative pressure values which doesn't depict the original condition. I have been through CSI Knowledge base about utilizing option of "Non Linear Allow Uplift" but my model keeps on doing iteration and doesn't show up any result. Has any body have similar experience in modeling Raft like this. Will appreciated your help. Thanks alot.
  19. Design Strips In Safe

    AOA.If the foor plan of a building consists of walls columns,beams etc at different location to make it more complex to draw design strips.can i draw any design strips parallel and perpendicular to each other without taking into account the position of columns, beams, walls etc throught the slab to design it.
  20. Safe2014 Dead Load Case

    When I import a raft or slab from ETABS 2013 to SAFE 2014, It is generating dead & "dummy" load case in safe 2014. Load Case, Dummy has a dead load with multiplier of 1. Whereas in Load case Dead, it has a dead and dead_above with a multiplier of 1. When I generate default load combinations from SAFE, it is considering dummy and dead with factor of 1.2. As far my understanding, it is considering double the self-weight of the structure. What SAFE 2014 is doing, is it right? or I have to delete the dummy load case from my model in order to avoid the duplication. Has anyone faced this issue? I hope anyone can make my doubts clear. Regards.
  21. Assalam o alaikum... Can we model beam footing in safe? Please guide about procedure.
  22. Stability Checks In Safe Software

    Assalam o alaikum. Kindly tell me whether SAFE has capability to do stability checks especially Sliding check and Overturning Check? Is yes then How? I model footing in safe and when i provide horizontal forces, my footing gets slide. Jazak Allah.
  23. Here are a number of questions that I need answered. Help would be appreciated. Q1. In ETABS, what if the beam combined fail in Shear and Torsion? Need Solution Q2. In ETABS, Obtained moments on both ends on simple supported beams. What to do? Q3. Discuss dependance of foundation on bearing capacity of soil in SAFE model? What options do you have if the Bearing Capacity is very low? How would you check and find one way and two way shear in SAFE model? Q4. Why mass and weight are considered separate in ETABS? Q5. Differentiate b/w P-Delta analysis vs Dynamic Analysis? Q6. Material properties and strength of Concrete depend on what parameters? Q7. What limit "1" in punching shows in SAFE? Even if you know just one answer, please reply. It would be very helpful. Thank you and Regards.
  24. Safe Mat Foundation

    Plz explore these questions. Q1:How to define bearing capacity of soil in SAFE? Q2:what is mean by the different terms used in SAFE Detailing drawing like TC,BF,BE,BC etc i think T for top and B for Bottom but the others? Q3:In SAFE as shown in figure what does the negative shows,if it shows direction then why it is given Max name to minimum value and Min name to maximum value for deflection as (Max=-0.068269in and Min=-0.118905in)? Q4:What is mean by Subgrade Modulus in SAFE and how we will calculate its value? Q5:For Five storey building my mat foundation possesess Punching shear values as shown so,what to do with sides although the thickness of mat is 48"? Q6:I need mat foundation reinforcement drawing please.
  25. i have an issue to discuss, regarding my etab and safe model... My etab model is good upto my knwledge AS I HAVE CHECK LOAD COMBINATIONS AND OTHER RESPECTIVE THINGS NEEDED TO BE CHECK, when i come to safe , due to few load combos having earthquake factor i got lot of moments specially in areas having shear walls so kindly tell me when we design foundation, do we have to consider all these load combos and how to avoid large reinforcement which is coming in areas of shear wall bcoz i thnk so practically so much reinforcement is not possible...\ I HAVE MODELED MY SHEAR WALLS AS PIN BUT NOT YET SATISFIED WITH MY RESULTS... building sizie is 90x180 so almost double in other direction and total no of storeys is 15...i used col size 15x36 , so need ur suggestions?????????? try 3.zip
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