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Hira Malik

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Hira Malik last won the day on January 15

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About Hira Malik

  • Rank
    Lieutenant

Profile Information

  • Gender
    Female
  • Location
    Lahore
  • University
    NEDUET
  • Employer
    MM PAKISTAN

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  1. MOVING AND STATIC LOAD CASE IN SAP2000

    Yes that I have already done because I always work through load combinations but to my surprise, when I made such a combination, it didn't appear in the display frame forces dialogue box. Will try again. JazakAllah to both of you
  2. I am modeling a culvert in SAP2000. I am unable to define a load case in which I can include both static and moving loads together. Is there a way I can run the model and check results for traffic and other static loads together? Or they can only be checked one at a time?
  3. TUNNEL DESIGN ON SAP2000

    How? How can I select all circular members at once and apply variable intensity of any pressure? Such that its max at top and decreases towards the bottom.
  4. TUNNEL DESIGN ON SAP2000

    Check the attached model. Rock pressures are as attchaed in previous post. Other loads are as follows: Top and bottom external pressures (kn/m) 2303.5 and 2336.5 Top and bottom internal pressures (kn/m) 863.5 and 896.5 Grout pressure is also attached. No idea why is it only acting at top 120 degrees
  5. TUNNEL DESIGN ON SAP2000

    OK. So is this only for the lateral rock pressure or the other pressures such as internal and external water pressure, and grout pressures be also applied in the 2-2 direction? I will attach the model with the loading details. Kindly check it if you have some time.
  6. TUNNEL DESIGN ON SAP2000

    I have attached the screenshot of the loading and how I applied it on SAP. So what I did was simply select the top, left and right frame sections of the tunnel and applied the loading as 39.59 and 48.6 as uniformly distributed load. While applying loads I selected local axis 3. Is it right? Also it confuses me to select the frames for a specific load. Like on how many frame members shall I apply the top loading? And how can I be sure that the members below those will only be used for the lateral loading?
  7. TUNNEL DESIGN ON SAP2000

    Thanx alot for your explained answers. 2. I am designing the tunnel elements as 2D frame sections. So if I apply varying load by selecting one element that will only be for that same element. What I want is that I want to model the whole tunnel as one element somehow, such that when I give value of loading after each distance by selecting all elements, the load is automatically applied as more at bottom and decreases gradually towards the top. I just have 2 values of internal water pressure, 803 at top and 837 at bottom. Want to model them as varying load.
  8. TUNNEL DESIGN ON SAP2000

    SAP2000 is used to model tunnels all the time. How is that the soil or rock forces cant be applied in SAP2000?
  9. TUNNEL DESIGN ON SAP2000

    Ohk i got that. Thank you both. Ok i hAve a few more question on the topic, 1. The stiffness is calculated for radial and tangential SPRINGS in the attached pic. That's for circular tunnel. How to calculate stiffness if springs or links are assigned to non-circular sections likes rafts or mat foundations? Whats the formula for STIFFNESS? 2. I have attached another pic of loading. How can I apply varying load on a structure like this? Like load is more at bottom and less at top. To do this, all the members must act as one circle but when i try to join lines, nothing happens. 3. There is also horizontal rock load, and again i have no idea how to apply it on a circular section.
  10. TUNNEL DESIGN ON SAP2000

    Kindly share any material on how to design a tunnel on sap2000. Attached is a pic of a model i found somewhere. this person has braced the tunnel by using "link supports" which I have no idea about since i have ever used them. Whats the purpose of these supports? Its properties have terms like coupled or uncoupled stiffness. and factors for line area and solid springs etc. That image is attached too and the values this person has entered are 1000 and 1000000. Its going above my head. Please guide about this and also how to calculate stiffness and when to define stiffness for a member?
  11. TUNNEL DESIGN

    wow thats great. thanx a ton !!!
  12. TUNNEL DESIGN

    I AM TIRED OF SEARCHING WEB FOR TUNNEL DESIGN MATERIAL. GOT ONE EXCEL SHEET WITH SHORT CALCULATION AND NO IDEA HOW THEY DID IT. PLEASE REFER ME TO ANY TUNNEL DESIGN SOFTWARE OR MANUAL EXAMPLES SO THAT I MAY BE ABLE TO UNDERSTAND TUNNEL DESIGN IN DEPTH.
  13. Experienced Structure Engineer needed in Lahore with minimum 5 years experience. Our main requirements are for the design of tunnels, prestress bridges, steel structures and power houses. Have you ever designed these or are confident you can do all these structures on your own? Salary will be based on your experience. No extra benefits/allowances will be provided, so its better to apply only if you live in Lahore. Engineers with all these capabilities send your CV at hira.malk@mmpkistan.com
  14. I am jobless (structural Engineer)

    job opportunity available at MM Pakistan Lahore office. kindly send your CV and salary requirements at hira.malik@mmpakistan.com
  15. Slab on grade

    I have a 100m by 2m slab resting on a river bed and is uniformly distributed. I want to know: 1. How to calculate the moment as its resting on a bed? 2. Do we need to be provide any reinforcement or such slab can be unreinforced? 3. What is the minimim reinforcement for such slab and where to place it? On top, bottom or middle third as stated in many reference books.
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