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  • Users: TLycan
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  1. TLycan

    ETABs Composite section Classification

    Dears, I am designing a composite profile, to AISC360-10) with web depth of 800mm and thickness of 8mm. EtaBs refuses to design a profile that is not compact according to its design manual:- "ETABS deems slender-element sections for flexure not acceptable and does not do any further checks...
  2. TLycan

    Etabs Walking vibration (peak load factor)

    Guy's, In CSI ETABS, the walking vibration form data, there is an item called Peak load Factor (default value) = 1.4 Can anyone tell me what is this factor for? and its reference? Thanks in...
  3. TLycan

    sigmented cover plate fatigue catagory at tension flange

    Dears, I've a steel built-up I girders 60 meter span bridge in which the bottom flange (tension flange) consists of two plates (the main bottom flange 100cmx5cm and a cover plate 80cmx4cm). the bottom flange is compromised of two plate due to a shortage in the local market. the fabricator...
  4. TLycan

    Thermal/Temperature load on a steel structure completlet covered by thermal insulated sandwich panel

    greetings all, I can't find any sense in taking a thermal load on the steel structure of Delta T=30 according to code if the whole building is covered by thermal insulation sandwich panel cladding. At least I can reduce the 30 degree effect by choosing a lesser delta t , say 20 degree. Is there...
  5. TLycan

    Vibrating steel beams carrying Agitator

    Dear All, A client asked me to check a problem of a vibrating steel structure. The steel structure is two beam 12.00 meters installed over a tank. these beams carry a Fan and a motor used to agitate a solution. The problem is these beams vibrate vertically as shown in the attached video. also...
  6. TLycan

    Creep effect on Layered shell

    Dear All , I am using SAP2000 Version 14.1 . I am using A staged-construction and time depended material non linearity. the problem is Multi-layered shell does not consider the effect of creep; if I switched to normal slab section the effect of creep appears did anyone face this problem...
  7. TLycan

    Anchorage in Circular Column

    Dear All, Is there any paper or Ideas of calculating the Concrete modes of failure per ACi-318-Appendix D for an anchorage in the face of a circular column. What I mean by face NOT in a circular cross-section as anchors protruding from concrete pedestal; it is a beam connected to circular...
  8. TLycan

    shear Force distribution on more than 2 columns of bolts

    dear All, I want to know if the shear force is distributed equally on the bolt columns . That is each column takes an equal share of the shear force . that is P/6 as per attached drawung and if there is any specs that states so. Regards...
  9. TLycan

    Seperate Modeling of Two building and taking their effect on each other

    We are Designing a two separate building one R.C and the other is steel. What I mean by separate they are not structurally or architecturally connected. the R.C is 4 floors and the steel is the same. I want to make the R.C building Supports the steel building laterally. and of coarse there is...
  10. TLycan

    how to approve Material submittal

    Dear All, I've been more than 15 years as a structural engineer; now I have a different job where I will go in the site technical office w to approve material submitals. to Explain, the contractor brings the brands documentation for say, bolts, screws, steel elements, and their data sheet...
  11. TLycan

    Difference between PCI and ACI318 APP-D in Concrete Inserts design

    Dear All, Can anyone tell me when to design the concrete inserts with PCI or ACI318 appendix D? Which of them is more common/credible in anchorage design. me question rises from the fact I found a difference in calculation of shear capacity when shear is parallel to edge Regards
  12. TLycan

    Steel bridge poor fabrication practice

    Dear All, I've the following problem, the contractor fabricated the steel I-girders of a bridge , in which the shop-flange welded splice happened to lie in the bolted splice. that is between the bolts is there any specs that prohibits such incident Refer attached drawing thanks in...
  13. TLycan

    Becoming a weld expert

    Dear all, I am a consultant structural Engineer. and now we have job or revising many steel bridges;a newly designed ones and those already in action. I need to know how to become or to Have the Feel/knowledge/Experiences of knowing: the poor quality weld from the good ones/ the cause/ what...
  14. TLycan

    SAP2000 Buckling, P-delta, P-delta+ large different results

    Dear all, I've posted this thread in "STR engineering and other topics" and I had no Response So Iam posting it again here since this forum is dedicated for SAP2000; hopefully I might get any response. I have the following problem. I am trying to find the buckling load for the beam in...
  15. TLycan

    SAP2000 Buckling, P-delta, P-delta+ large different results

    Dear all, I have the following problem. I am trying to find the buckling load for the beam in attached SAP file. The following are the strange results I’ve got: Eigen Value buckling (buckling analysis) = 39X1 tons P-Delta Non-linear analysis = 9 tons P-Delta + large displacement Non-linear...
  16. TLycan

    Coupled and Uncoupled Stiffness

    Dear All, Does anyone know what is the Structural/physical meaning of Coupled and Uncoupled Stiffness. I found it in the Stiffness of Link element in SAP2000 Thanks in advance
  17. TLycan

    critical Weld point

    Dear All, Is there is any welding restriction/specification for the weld detail shown in det-a in the attached file thanks in advance http://files.engineering.com/getfile.aspx?folder=c3fb942b-948f-4b8e-81c8-13315a55a159&file=det_a.pdf
  18. TLycan

    steel frame oscillating

    Dear All, I am facing a structural problem right now. I’ve designed a very simple steel portal frame 8meters height and 5meters span which is strength/deflection very safe by the way. When someone rides the roof near to it and pushes it with his feat it vibrates/ sway/ oscillate, whatever you...
  19. TLycan

    Design against Truck Impact

    Hi everyone, I need to design a steel structure to resist the impact of a 7500kg truck running with a velocity of 80KPH. please not the formula F.d= 1/2M.v2 will give extreme high forces . can anyone know any practice/code for such design regards
  20. TLycan

    Skew steel bridge with no cross-beams

    I am Reviewing an Existing steel bridge. the Bridge is very skew, average Span = 40meters, main girder depth = 2.00meters and you can say NO cross-girders. My questions are: 1-is there is any specs about the analysis/design of such bridge with No cross-beams 2-I run the normal grillage analysis...

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