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  1. ajose

    Shell Structure - FEA software

    Yes, i agree with every one states, all the FEM have the plate (shear), membrane (tension) or both on them. There are software for civil structures like SAP2000, RAM, Robot have the behavior you are looking for, they are not so good for solid elements because the meshing option, but they are...
  2. ajose

    Long Span Pedestrian Bridge Vibration

    The case cited by Jorton is very important and i would like to take it from this point. He said he became "nauseated", but that is not the worst impact on humans, the impact could be more severe. It is not casual that the codes state limits number of hours operating some equipment. So the...
  3. ajose

    Adding cover plates - weld under tension

    Your post is an interesting question and i would like to add some words about it. When you weld on stressed member of a structure you are dividing in phases the construction. First stage, the stressed member and the reinforcement doing nothing. Second stage, when additional loads come in there...
  4. ajose

    Long Span Pedestrian Bridge Vibration

    I would like to advise about a non structural factor on vibration and it is serviceability. If people get unconfortable to cross the bridge then they could try to avoid it. There is other criteris for vibration besides AASHTO like: AISC Degin guide 11 Floor vibration due to human activity...
  5. ajose

    Torsion resistance of concrete shearwall core

    The torsion design have three or more steps. Step one is design for bending flexure. Step two is design for shear force. Step three is design longitudinal bars for torsion. Step four is design for shear torsion. (This process is clear on codes) For main member for more than 6 stories on...
  6. ajose

    Long-slotted holes as expansion joint

    I do not agree the statement of the slot holes to build expansion joints have to be discarded. I have read the paper and it like the joint was not the proper one and was not carefully designed. The sloted hole is normally used on seated beam to void unseated. So the bolts are locked with two...
  7. ajose

    Heat of Hydration

    There is a description with explanation on EM 1110-2-542 Engineering and design. Thermal Studies of mass concrete structures. USACE (free internet download) ACI 207.1 Mass concrete (here it is a simple method proposed by Schmidt) Like concretemasonry and you can verify with this references...
  8. ajose

    Biaxial Shear and Mohr's Circle

    hi nhtr86 , Yes you are right it is not the right way of analysis. The 2D Mohr's circle is build with principal stresses S1, S2 (S1>S2). Because they are principal stresses have no shear so you have two points and one rule "there cannot be lower stresses than S2 or bigger stresses than S1"...
  9. ajose

    Stainless steel cable with aluminum fastener

    hi pqmm, With the two metals you are planning to use could be some problems. Before explain some simple way to find out the potential, first have to say that you can only know that there is a problem, not how fast could corrode. The problem is complex but you can divide it in two steps...
  10. ajose

    Yield line patterns

    hi 3JC, I don't know if you are already find the information you are looking for by now. The design method that you are qouting it is only mandatory on Special Moment Frame "SMF" and Intermedia Moment Frame "IMF". You can find some information about that including formulas in the reference...
  11. ajose

    Channel Web to W-Flange Column Connection

    hi Sidework, The answer is the bolt connection is able to transfer moment. And all the moment that connection allows. This connection is grouped in "ECCENTRICALLY LOADED BOLT GROUPS" and is the type "Eccentricity in the Plane of the Faying Surface", please got to AISC "Manual of Steel...
  12. ajose

    Sectored Axi-symmetric Model

    Hi ginsoakedboy, There is a diference in ANSYS about symmetry to build the model and symmetry to analize the model. It is easy to check on the project three. One of them is in model the other on analysis. Cyclic symmetry it is to build the model, so if you have the complete model there is no...
  13. ajose

    Dining Area Vibration Values

    Hi Galambos, For floor vibration it´s just enough to have the area loaded and some one walking. I have already test my theory on some one design. So if you are designing on stee there are several recomendations: AISC Design Guide 11 - Floor Vibrations Due To Human Activity Structural Steel...
  14. ajose

    Knee-Braced Frames

    I'm agree with the answer given by JoshPlum, JAE & Trainguy about the bracing, and i would like to add: Your detaling cannot be qualified like EBF, it is just a knee bracing. To qualified like EBF, the bracing goes from node beam-colum to beam or beam to beam. And this is for guarantee the...
  15. ajose

    Piping Support: Am I being unnecessarily cautious?

    Koot, You are right, i have work with supports analisys on several stages. I'm agree with you there are several steps when you talk about piping support. Let me roughly make some example based on my experience. The normal level, the one used in residencial ones it is enough work with the wet...
  16. ajose

    Bridge Jacking Loads

    JEmH, When i design a steel or concrete bridge i normally left the provision for replace the pad bearings (Bigger Diaphragms). I place on drawings the place for each jack so the bridge does not rotate. The equipment for replacement is jacks plus some compressor, and it is no hard to get on...
  17. ajose

    Ansys Advice

    DHK, Answering your question, yes ANSYS Multiphisycs Workbench, the one i have worked with, perform the plate buckling analisys. By now there are several ANSYS on market, the classical one and the workbench. Besides those you have Multiphisics, Mechanical, Civil, etc. The classical one has on...
  18. ajose

    3-D "brick" elements

    This is a very interesting issue. The model give some differences with prototype. Your question is not very clear, so my questions are going to be some general ones: I have some question about the match of the boundaries conditions including loads. The supports, area of supports or border...
  19. ajose

    Brick Arch

    I was looking at your picture, and have some question: Is there two planes, one at the entrance door and other at windows upstair the entrance door? The wall at the window upstair is supported on a slab or is it over the door wall? What are the door-window wall materials? What are the...
  20. ajose

    How do you document your calcs?

    I have made calculation in different software. For normal calculation that do not involved FEM (bar, framed structures are particularities) i used to work with microsoft excell but now i do it with mathcad. I usually insert diagrams made in microsoft word when there is no electronic drawing...

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