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  1. bdbd

    Corrosion of Reinforcement in Construction Joint

    What is keeping the reinforcement in construction joint from corroding? Even if we use waterstops, it's in-between the outer and inner reinforcement, leaving outer reinforcement exposed to the water and other corroding agents in the joint area.
  2. bdbd

    Which Steel Stress for Crack Width Calculation for Multi-Layer Reinforcement?

    Hi! Very short but hard question: When you have more than one layer of reinfoircement on tension face, which steel stress should be used for crack width calculation and can you provide a reference to your answer? A) Outermost reinforcement's stress B) Stress at the centroid of the tensile...
  3. bdbd

    Most Critical M & N Couple for SLS Analyses

    Hi! My problem is, in my opinion, should be very common, but have not seen many posts. I have a shell and with most software, I can get an envelope of results along many load combinations. The structure I am working on is mostly governed by SLS (Crack Width). So, I go in and get the shell...
  4. bdbd

    Neutral Axis with Axial Force and Bending Moment in Cracked Section

    Do you think that axial force and bending moment changes the neutral axis of a cracked section? If so, can you refer me to the relevant reference? All the reinforced concrete books I have checked uses geometric equivalency and the neutral axis depth is not depending on the axial force and...
  5. bdbd

    Point load on a rectangular plate on spring (Roark-like formulation)

    Hi, as written on the title, I am looking for a Roark-like case explained in a simple way: "Point load on a rectangular plate on spring." So, the bending and shear calculation for the plate sitting on a soil represented by linear uniform springs.
  6. bdbd

    Bending Moment and Axial Force from Stresses in Soild Elements

    Hi, If you model a member with solid elements, you can get different stress results, such as Syy, Sxy, Sxx etc. depending on the notation used by the software. In a report that I read (by a reputable consultant), they have used these stresses to calculate the bending moment and axial forces...
  7. bdbd

    Illustration for Technical Books

    Hi, I am very obsessed with creating good figures for reports and papers. I see that in some books they have these very well prepared figures, and I just wanted to ask you if any of you know the common softwarw that authors usw? I can't believe if these are simple Autocads.
  8. bdbd

    Drained Modulus and Stroud Butler 1975

    Hi, Does anyone have a copy of the following paper? Actually I am looking logical drained modulus correlations. The elastic theory is not valid to correlate Eu with E', hence Stroud and Butler has some recommendations based on cu for E'. (See Barnes' Soil Mechanics). If you have the paper I...
  9. bdbd

    Looking for English of this system

    Hello, I couldn't find the English translation of this method. Can anyone help me? https://www.youtube.com/watch?v=Oz9iX2QIgyE https://www.youtube.com/watch?v=V5eyvA7KVwk
  10. bdbd

    Formulations for Poulos & Davis (1980) Method for Single Pile Settlement

    Hey everyone, Most of you know the Poulos & Davis (1980) for calculation of settlement of single pile. There are four or five charts. Have you ever seen formulation of these charts? I want to digitize that process, however, I do not want to deal with that extensive effort if there is something...
  11. bdbd

    Free Reinforcement Calculation Software

    Hey, It is my soft spot, so don't hit me hard. I do not want to deal with reinforcement calculation of piles (retaining or foundation), diaphragms etc. What software do you use? Especially free.. I have used Response 2000, Blue5Soft. Do you have any recommendation? What I want to do simple...
  12. bdbd

    Bentley - Plaxis - SoilVision

    I am sure you saw that Bentley acquired Plaxis and SoilVision. Any thoughts on this?
  13. bdbd

    Permeability of Sand-Clay Mixtures

    Hello everyone, I had a really important problem and performed an extensive literature search, however, I couldn't find anything except few articles. My problem is: Sand's permeability. We all -I think- sand settles almost immediately due to high permeability. Howewever, in a project, I had a...
  14. bdbd

    COOPER E80 Dynamic Loading

    Hello everyone, I was looking for dynamic loading of Cooper E80? I have already modelled it with static line loads based on AREMA procedures, however, now I have to perform some dynamic analyses. Do you have any experience, easy ways to create time-amplitude graph of high speed railways?
  15. bdbd

    B/L Ratio for Raft In Finite Element

    Hello everyone, Previously I had ask this question. But, only get one answer. I really need to know if there is any literature about it. As I said, I appreciate your design methodology, but a paper or thesis would be better. http://www.eng-tips.com/viewthread.cfm?qid=401499 Hello, For a...
  16. bdbd

    Consolidation Behavior of Clay Under Different Saturation Ratios

    My question is related to consolidation test behavior under different saturation ratios. By standard, common oedometer tests are performed under 100% (approximately) saturation. They wet the soil for a period, then conduct the test. This will give full consolidation behavior. However, in site...
  17. bdbd

    Terzaghi Collection

    Hello, We all adore Terzaghi, but there is not a collection of his papers. Of course, NGI has an extensive collection but for us, engineers there is no online collection. Why can't we do a little something together? For example my limited Terzaghi collection can be found in the link...
  18. bdbd

    (Consolidation) Settlement of Piled Raft

    Hello everyone, This is a broad topic, but I just want to know what do you do in practice: I would like to know which theory do you use while estimating the settlement of piled raft? But please, assume that our piles are not rock socketed. For ease, you can assume piles are inside cohesive...
  19. bdbd

    Deep Foundation Software

    Which software do you use (when you use) for piled raft foundations? I usually work with structural engineer for iteration of pile capacities, they use SAP, ETABS etc. If I am alone in the design, I usually go with hand calculation, however, calculationg pile-raft load sharing ratio is not an...
  20. bdbd

    Sprimg Stiffness For Piles

    In my country of practice, structural engineers solve piles with beam elements that are defined by lateral and vertical springs. Aside from correctness of this method, I was wonderingg, how do you calculate the vertical spring stiffness? bowlea just gives a table, I hope to see (maybe directly...

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