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  1. Awre

    Interpolating Points

    I have three stacked blocks with widths denoted as B1, B2, and B3. Each block is 4 feet high
  2. Awre

    Lateral pressure from a concrete backfill

    I have a gravity wall composed of concrete block, the total height will be about 40 feet. The backfill at the bottom third of the wall will be filled with concrete for a width of 10 feet approximately. For the stability calculations, I think I can assume some shielding from lateral loads...
  3. Awre

    Required tension reinforcement

    Thanks @Just Some Nerd, does this apply even If I have a very small moment such as 0.2 kip-ft/ft or even less (0.03 k-ft/ft, etc)? Should I add moment steel because of this moment? Note that there are also minimum steel requirements, max spacing, etc. so, I may end up with more steel than it...
  4. Awre

    Required tension reinforcement

    There is a clause in the code that states: A minimum area of flexural reinforcement, Asmin, shall be provided at every section where tension reinforcement is required by analysis. My question (s): What does it mean that the tension reinforcement "would be required by analysis"? When this...
  5. Awre

    Lateral Earth Pressure in a limited space

    It is a hollow concrete modular block that will form a wall like what you see on highways, filled with soil. I was thinking about the soil pressure from the inside, at least on the front face; presumably, the pressure on both sides and the back will be nulled since the soil is on both sides of...
  6. Awre

    Lateral Earth Pressure in a limited space

    If I have a hollow concrete structure; 5 ft W X 10 ft L X 30 ft H that will be filled inside with soil, and nothing from outside "theoretically". I need to calculate the earth pressure on all the sides, and wondering if the full lateral earth pressure will be developed within this limited...
  7. Awre

    Modeling Simple Slab in STAAD - Need help with the results

    Thanks, @steveh49 ... So if I design for the 2.3 k-ft moments (of course after I apply the load factors and approperiate load combinations), is it acceptable? Where does it say in the model that the effective width is 7.5 ft? I am new to STAAD and still experimenting with it ... Thanks for...
  8. Awre

    Modeling Simple Slab in STAAD - Need help with the results

    I wanted to model an 8.67' X 31.5’ concrete slab with a 16,000 lb. load applied at the center and nothing else. I did not apply any self-weight or load factors in this exercise The slab will have fixed ends at all sides. Can anyone explain why I am getting apparently a very low maximum...
  9. Awre

    Friction coefficient for stone on stone

    I am checking the sliding of modular precast blocks wall, which are hollow blocks, filled with stones (less than 1"). What is the typical coefficient of friction between stones when it comes to sliding check? Thanks
  10. Awre

    Seismic Force for a gravity wall in AASHTO

    Hi bones206! I need to figure out the trapezoidal load distribution for the surcharge load, which is shown in the attached figure of my original post. It appears that the maximum at the surface is: Kh*Wsurcharge, correct? What is the minimum at the toe of the wall? And how to calculate the Fp...
  11. Awre

    Seismic Force for a gravity wall in AASHTO

    Thanks! Any idea on the surcharge load calculation part?... Thanks again
  12. Awre

    Seismic Force for a gravity wall in AASHTO

    Hi, I posted this in the Earth Retention Engineering forum, but I had no luck for three days. I am calculating the seismic force on a gravity wall per AASHTO. The concentrated dead load surcharge pressure distribution is not clear (to me!). How can I estimate the maximum, and minimum pressure...
  13. Awre

    Seismic Force for a gravity wall in AASHTO

    Hi, I am calculating the seismic force on a gravity wall per AASHTO. The concentrated dead load surcharge pressure distribution is not clear (to me!). How can I estimate the maximum, and minimum pressure values for the trapezoid to calculate Fp? Also, is Kaf is the same as Ka utilizing...
  14. Awre

    Historical steel sheet pile sections

    Hi All, Anyone has the the historical sheet pile sections and properties, which have been used over the years and categorized by year range? I recall I have seen something like this in the past. I appreciate if someone have it ans share.. Thanks
  15. Awre

    Round manhole resting on beams in a square arrangement

    Thanks JedClampett!..since I am not in the office, is the pic example available online? Also, since the load will be distributed alone circular surface, any idea on whether there would be spots along the loaded area in the beam be weaker; specially those spots that are closer to the edge; that...
  16. Awre

    Round manhole resting on beams in a square arrangement

    I have a round manhole, the base frame (round) is resting on 4 beams in a square arrangement. The bearing area on the concrete will be a segment of the circle on each side with maximum height of 6" from the edge of the beam (attached is a sketch). Since the load is not spanning the entire beam...
  17. Awre

    Modelling Slab, beam, and columns in STAAD with offsetting (?)

    I need to model a simple structure consists of slab, pile caps, beams, and piles in STAAD. I am modeling the centerlines, but when I look into the 3-D rendering it does not look great. Elements appears to be at different elevations(page of the attachment). What is right to model such...
  18. Awre

    Axial Load capacity for an partiall encased pile

    Thanks KootK and Lomarandil.. Can I reasonably assume the same with the following 2 scenarios: - the same 49' long HP with 30' encasement (~full of the exposed height and 60% of the total height) - 35' long HP at shallower areas (15' exposed + 20' to fixity) with 15' encasement (full of the...
  19. Awre

    Axial Load capacity for an partiall encased pile

    Hi, I have an HP pile in the water, 29 feet exposed height and assuming fixity at 20 feet below mud line.http://www.eng-tips.com/ The pile is encased by 24" diameter concrete from top until 15 feet down (almost half the exposed height is encased) How to calculate axial load? How to calculate the...
  20. Awre

    Capping for PAZ combined wall system

    I am looking for RC capping options for a PAZ combined steel sheet pile wall. The piles are about 1.5 m in diameter with 2 AZ-26 sheet pile in between. Since this would be on the water one of the options is to drop the face of the cap in front of the wall system to the water level which is...

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