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  1. rte4563

    Can you convert radial reinforcement to equivalent longitudinal reinforcement?

    I have radial reinforcement as seen with blue lines below. I was wondering; if I dont want to do radial reinforcement, can I convert this to longitudinal reinforcement in the X and Y direction instead? What I want; just regular reinforcement in the horizontal and vertical direction: Edit: The...
  2. rte4563

    Should I worry about this warning message in my FEA analysis (structural engineering)?

    The aspect ratio doesnt look too bad no? Mesh which is automaticall generated, looks like the base is rectangular ish:
  3. rte4563

    Should I worry about this warning message in my FEA analysis (structural engineering)?

    I have three separate parts (shell element plates) coming together at the bottom where I get my warning message - here the bottom concrete deck, a rectangular and circular concrete part all meet and my FEA software doesnt seem to like it, can I still run this safely or should I try to model it...
  4. rte4563

    What happens in my FEA analysis when I pin the top of walls from 1st floor?

    Is there any way this isn't a conservative assumption when you have RC concrete? I know it depends on a lot of factors but could you think of an example in a building like this that is RC concrete.
  5. rte4563

    What happens in my FEA analysis when I pin the top of walls from 1st floor?

    I need to check the capacity of the deck and walls in this building. My senior supervisor told me I can just put pinned at top of the walls from the 1st floor. So I only need to model the 2nd floor deck and walls since everything below has enough capacity. I wonder what happens then in my FEA...
  6. rte4563

    What is the horizontal force I get from the vertical force F (EC2 6.5.3)?

    If you look at figure 6.25 you can see I have a force "F" acting on an area "a" - what horizontal force does this give? I wanna make sure I have enough reinforcement in my concrete foundation to take this horizontal force that "spreads out" in the concrete, say if for example force "F" is 100 kN...
  7. rte4563

    When I add Point mass/Inertia - does it get added from step 0?

    When I add point mass to my model, does it get added to the initial step and propogates throughout all the steps?
  8. rte4563

    What could have caused the damage done to concrete columns?

    could you please expand on this?
  9. rte4563

    What could have caused the damage done to concrete columns?

    I have a short reinforced concrete columns which support a train track as sketched below: The upper part of column has had its concrete removed/pushed out on one side. Most logical conclusion would be its the train track which push the concrete out with horiontal forces, but in this specific...
  10. rte4563

    Point Mass/Inertia

    I have a concrete deck which is subjected to point loads in Newton. I am running a simple static analysis. I was wondering if I were to add point mass/inertia, of say 100kg would this be somehow wrong in a static analysis? For example make it non static somehow. I ask because I only have...
  11. rte4563

    What would be the transverse shear reinforcement in this case?

    I have a cross section as seen below, where the stirrup bars have a 12 mm diameter and center spacing of 150 mm. If I am asked what the transverse shear reinforcement is in the top part of the cross section (marked with black rectangle), is that the distance I've marked with the arrows in the...
  12. rte4563

    Why can I not extract displacement when doing a steady state dynamics modal analysis

    Error message says: "Mixing steps with time and mode number domains while creating an XYData object is prohibited" when I try to extract displacement at a node for the concrete foundation im looking at. This is the step im trying to extract the displacement from: Before this step I do a...
  13. rte4563

    Define stiffness in two directions?

    Easiest way would probably be to define the: E1, E2, E3 (Youngs moduli in global X,Y,Z direction) Nu12, Nu13, Nu23 (Poisson's ratio in global X,Y,Z direction) G12, G13, G23 (Shear moduli in global X,Y,Z direction)? when I have vertical/horizontal stiffness and the W*L*H of the rubber bricks?
  14. rte4563

    Define stiffness in two directions?

    I have a rubber brick which has a given stiffness (and a given Youngs modulus for its width*length*height) in the horizontal and vertical direction. Since the Youngs modulus is dependent on the dimensions of the rubber brick, I can't get both the vertical and horizontal stiffness to be...
  15. rte4563

    Steady-state linear dynamic analysis

    Thank you. I would then take the vibration speed at the same place on the foundation for one load at 150Hz another at 30Hz and then just add them? If I wanna distribute the concentrated force P1 in the picture I posted, for example over 3 nodes, can I simply divide the load on 3 and and put it...
  16. rte4563

    Steady-state linear dynamic analysis

    I am running a dynamic analysis as described here: https://classes.engineering.wustl.edu/2009/spring/mase5513/abaqus/docs/v6.6/books/stm/default.htm?startat=ch02s05ath30.html I have a concrete foundation which has a turbine (left side) and a generator (right side) on it. The loads from turbine...
  17. rte4563

    Dynamic loads applied at concrete foundation

    I have a concrete foundation which has a turbine (left side) and a generator (right side) on it. The loads from turbine have vibrating forces at frequency = 150 Hz, and the generator 30 Hz. There has been done a similar exercise earlier with a steady state modal analysis in Abaqus, but there was...
  18. rte4563

    Best way to connect reference point to points subjected to vertical load

    I apply inertia to these reference points (100kg, 200kg etc). Is there a way for me to check the final amount of kg applied to the model? I wanna check if the applied mass (kg) is the same amount of kg that comes out in the results, as a control to see if it has been applied correctly or not...
  19. rte4563

    Best way to connect reference point to points subjected to vertical load

    Another problem now if you dont mind[dazed] in the first picture I showed one reference point and 3 nodes. In reality I have about 7-8 reference points and all of them are connected to the same 15 nodes. I get the error message for the nodes: "INSTANCE XXX HAS TWO RIGID BODY REFERENCE NODES 2...
  20. rte4563

    Best way to connect reference point to points subjected to vertical load

    Does this look sort of right? I chose reference point as reference point, and region type as Pin (nodes). Edit: Maybe it would have better to use Tie (nodes)to tie rotational and translational DOF's.

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